Subjects -> ENVIRONMENTAL STUDIES (Total: 913 journals)
    - ENVIRONMENTAL STUDIES (810 journals)
    - POLLUTION (31 journals)
    - TOXICOLOGY AND ENVIRONMENTAL SAFETY (54 journals)
    - WASTE MANAGEMENT (18 journals)

ENVIRONMENTAL STUDIES (810 journals)            First | 1 2 3 4 5     

Showing 401 - 378 of 378 Journals sorted alphabetically
International Journal of Environment and Sustainable Development     Hybrid Journal   (Followers: 17)
International Journal of Environment and Waste Management     Hybrid Journal   (Followers: 2)
International Journal of Environment, Workplace and Employment     Hybrid Journal   (Followers: 7)
International Journal of Environmental Engineering     Hybrid Journal   (Followers: 6)
International Journal of Environmental Health Engineering     Open Access   (Followers: 1)
International Journal of Environmental Health Research     Hybrid Journal   (Followers: 3)
International Journal of Environmental Policy and Decision Making     Hybrid Journal   (Followers: 3)
International Journal of Environmental Research     Hybrid Journal  
International Journal of Environmental Research and Public Health     Open Access   (Followers: 22)
International Journal of Environmental Science and Technology     Hybrid Journal   (Followers: 5)
International Journal of Environmental Studies     Hybrid Journal   (Followers: 5)
International Journal of Exergy     Hybrid Journal   (Followers: 2)
International Journal of Global Environmental Issues     Hybrid Journal   (Followers: 4)
International Journal of Global Sustainability     Open Access   (Followers: 2)
International Journal of Global Warming     Hybrid Journal  
International Journal of Greenhouse Gas Control     Partially Free   (Followers: 5)
International Journal of Hygiene and Environmental Health     Hybrid Journal   (Followers: 7)
International Journal of Logistics Research and Applications : A Leading Journal of Supply Chain Management     Hybrid Journal   (Followers: 16)
International Journal of Mining and Geo-Engineering     Open Access  
International Journal of Phytoremediation     Hybrid Journal   (Followers: 1)
International Journal of Process Systems Engineering     Hybrid Journal   (Followers: 1)
International Journal of Recycling of Organic Waste in Agriculture     Open Access   (Followers: 1)
International Journal of Reliability and Safety     Hybrid Journal   (Followers: 11)
International Journal of Renewable Energy Development     Open Access   (Followers: 6)
International Journal of Social Sciences and Management     Open Access   (Followers: 2)
International Journal of Soil, Sediment and Water     Open Access   (Followers: 4)
International Journal of Stress Management     Full-text available via subscription   (Followers: 6)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 7)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 4)
International Journal of Sustainable Materials and Structural Systems     Hybrid Journal   (Followers: 1)
International Journal of Sustainable Society     Hybrid Journal   (Followers: 2)
International Journal of the Commons     Open Access   (Followers: 2)
International Journal of Toxicology     Hybrid Journal   (Followers: 17)
International Journal of Water Resources and Environmental Engineering     Open Access   (Followers: 11)
International Review of Environmental and Resource Economics     Full-text available via subscription   (Followers: 4)
Iranian Journal of Health and Environment     Open Access  
ISLE: Interdisciplinary Studies in Literature and Environment     Hybrid Journal   (Followers: 3)
Isotopes in Environmental and Health Studies     Hybrid Journal  
JACEE (Journal of Advanced Civil and Environmental Engineering)     Open Access  
Jahangirnagar University Environmental Bulletin     Open Access  
Journal for the History of Environment and Society     Open Access   (Followers: 3)
Journal of Bioremediation & Biodegradation     Open Access   (Followers: 1)
Journal of Earth Science & Climatic Change     Open Access   (Followers: 14)
Journal of Petroleum & Environmental Biotechnology     Open Access   (Followers: 1)
Journal of Advances in Environmental Health Research     Open Access   (Followers: 2)
Journal Of Advances In Natural Sciences     Open Access   (Followers: 1)
Journal of Aging and Environment     Hybrid Journal   (Followers: 4)
Journal of Agricultural and Environmental Ethics     Hybrid Journal   (Followers: 8)
Journal of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
Journal of Agriculture and Ecology Research International     Open Access  
Journal of Air Pollution and Health (رتبه علمی- پژوهشی)     Open Access  
Journal of Anatolian Environmental and Animal Sciences     Open Access  
Journal of Applied Ecology     Hybrid Journal   (Followers: 207)
Journal of Applied Meteorology and Climatology     Hybrid Journal   (Followers: 42)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Applied Toxicology     Hybrid Journal   (Followers: 19)
Journal of Applied Volcanology     Open Access   (Followers: 7)
Journal of Applied Water Engineering and Research     Hybrid Journal  
Journal of Arid Environments     Hybrid Journal   (Followers: 12)
Journal of Biochemical and Molecular Toxicology     Hybrid Journal   (Followers: 4)
Journal of Biosystems Engineering     Full-text available via subscription  
Journal of Chemical Ecology     Hybrid Journal   (Followers: 4)
Journal of Civil Engineering and Environmental Sciences     Open Access  
Journal of Climate     Hybrid Journal   (Followers: 56)
Journal of Climate Change and Health     Open Access   (Followers: 5)
Journal of Coastal Research     Hybrid Journal   (Followers: 31)
Journal of Contaminant Hydrology     Hybrid Journal   (Followers: 19)
Journal of Earth, Environment and Health Sciences     Open Access   (Followers: 2)
Journal of East African Natural History     Full-text available via subscription   (Followers: 7)
Journal of Ecology     Hybrid Journal   (Followers: 136)
Journal of Ecology and Environment     Open Access   (Followers: 3)
Journal of Economic Development, Environment and People     Open Access   (Followers: 11)
Journal of Energy & Natural Resources Law     Hybrid Journal   (Followers: 5)
Journal of Energy and Environment Technology of Graduate School Siam Technology College     Open Access  
Journal of Environment and Earth Science     Open Access   (Followers: 11)
Journal of Environment and Ecology     Open Access   (Followers: 10)
Journal of Environment Pollution and Human Health     Open Access   (Followers: 3)
Journal of Environmental Analysis and Progress     Open Access  
Journal of Environmental and Agricultural Studies     Open Access   (Followers: 1)
Journal of Environmental and Public Health     Open Access   (Followers: 16)
Journal of Environmental Assessment Policy and Management     Hybrid Journal   (Followers: 5)
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 5)
Journal of Environmental Economics and Policy     Partially Free   (Followers: 4)
Journal of Environmental Education     Hybrid Journal   (Followers: 7)
Journal of Environmental Engineering and Landscape Management     Open Access   (Followers: 8)
Journal of Environmental Engineering and Science     Hybrid Journal   (Followers: 2)
Journal of Environmental Extension     Full-text available via subscription  
Journal of Environmental Geography     Open Access   (Followers: 6)
Journal of Environmental Law     Hybrid Journal   (Followers: 22)
Journal of Environmental Management     Hybrid Journal   (Followers: 44)
Journal of Environmental Management     Open Access   (Followers: 1)
Journal of Environmental Management and Tourism     Open Access   (Followers: 13)
Journal of Environmental Media     Hybrid Journal  
Journal of Environmental Planning and Management     Hybrid Journal   (Followers: 26)
Journal of Environmental Policy & Planning     Hybrid Journal   (Followers: 14)
Journal of Environmental Professionals Sri Lanka     Open Access  
Journal of Environmental Protection     Open Access   (Followers: 1)
Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering     Hybrid Journal   (Followers: 5)
Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes     Hybrid Journal   (Followers: 5)
Journal of Environmental Science and Technology     Open Access   (Followers: 7)
Journal of Environmental Sciences     Full-text available via subscription   (Followers: 8)
Journal of Environmental Statistics     Open Access   (Followers: 4)
Journal of Environmental Studies and Sciences     Partially Free   (Followers: 2)
Journal of Environmental Sustainability     Open Access   (Followers: 7)
Journal of Environments     Open Access  
Journal of Exposure Science and Environmental Epidemiology     Hybrid Journal   (Followers: 6)
Journal of Fisheries and Environment     Open Access  
Journal of Forest and Natural Resource Management     Open Access  
Journal of Freshwater Ecology     Hybrid Journal   (Followers: 14)
Journal of Geography, Environment and Earth Science International     Open Access  
Journal of Geoscience and Environment Protection     Open Access  
Journal of Great Lakes Research     Hybrid Journal   (Followers: 5)
Journal of Green Building     Full-text available via subscription   (Followers: 10)
Journal of Hazardous Materials     Hybrid Journal   (Followers: 12)
Journal of Hazardous Materials Advances     Open Access  
Journal of Health Management     Hybrid Journal   (Followers: 10)
Journal of Health Organisation and Management     Hybrid Journal   (Followers: 29)
Journal of Housing and the Built Environment     Hybrid Journal   (Followers: 8)
Journal of Human Behavior in the Social Environment     Hybrid Journal   (Followers: 6)
Journal of Hydrology X     Open Access   (Followers: 5)
Journal of Industrial Ecology     Hybrid Journal   (Followers: 17)
Journal of Integrative Environmental Sciences     Hybrid Journal   (Followers: 4)
Journal of International Maritime Safety, Environmental Affairs, and Shipping     Open Access   (Followers: 1)
Journal of Iron and Steel Research International     Hybrid Journal   (Followers: 7)
Journal of Korean Society of Environmental Engineers     Open Access  
Journal of Land Use Science     Hybrid Journal   (Followers: 3)
Journal of Management and Sustainability     Open Access   (Followers: 7)
Journal of Mega Infrastructure & Sustainable Development     Hybrid Journal  
Journal of Natural Resources and Development     Open Access   (Followers: 2)
Journal of Natural Sciences Research     Open Access   (Followers: 1)
Journal of Occupational and Environmental Hygiene     Hybrid Journal   (Followers: 6)
Journal of Operational Oceanography     Hybrid Journal   (Followers: 5)
Journal of Organizational Behavior     Hybrid Journal   (Followers: 60)
Journal of Outdoor and Environmental Education     Hybrid Journal   (Followers: 2)
Journal of Pharmacological and Toxicological Methods     Hybrid Journal   (Followers: 7)
Journal of Plant Science and Phytopathology     Open Access  
Journal of Policy Analysis and Management     Hybrid Journal   (Followers: 28)
Journal of Population and Sustainability     Open Access  
Journal of Reliable Intelligent Environments     Hybrid Journal  
Journal of Renewable and Sustainable Energy     Hybrid Journal   (Followers: 11)
Journal of Research in Forestry, Wildlife and Environment     Open Access   (Followers: 5)
Journal of Rural and Community Development     Open Access   (Followers: 1)
Journal of Safety Engineering     Open Access   (Followers: 37)
Journal of Safety Research     Hybrid Journal   (Followers: 89)
Journal of School Violence     Hybrid Journal   (Followers: 6)
Journal of Sustainability and Environmental Management     Open Access   (Followers: 1)
Journal of Sustainable Development     Open Access   (Followers: 24)
Journal of Sustainable Development Studies     Open Access   (Followers: 15)
Journal of Sustainable Society     Open Access   (Followers: 2)
Journal of the American Planning Association     Hybrid Journal   (Followers: 18)
Journal of the Atmospheric Sciences     Hybrid Journal   (Followers: 83)
Journal of Tropical Ecology     Hybrid Journal   (Followers: 15)
Journal of Urban and Environmental Engineering     Open Access   (Followers: 5)
Journal of Urban Ecology     Open Access   (Followers: 5)
Journal of Vietnamese Environment     Open Access   (Followers: 1)
Journal of Water and Environmental Nanotechnology     Open Access   (Followers: 1)
Journal of Water Security     Open Access   (Followers: 6)
Julius-Kühn-Archiv     Open Access  
Jurnal Kesehatan Lingkungan     Open Access  
Jurnal Manusia dan Lingkungan     Open Access  
Jurnal Pengendalian Pencemaran Lingkungan     Open Access  
Jurnal Presipitasi     Open Access   (Followers: 1)
Jurnal Rekayasa Kimia & Lingkungan     Open Access  
Jurnal Sains & Teknologi Lingkungan     Open Access  
Jurnal Wilayah dan Lingkungan     Open Access  
Knowledge Management Research & Practice     Hybrid Journal   (Followers: 16)
Koedoe : African Protected Area Conservation and Science     Open Access   (Followers: 2)
Lake and Reservoir Management     Hybrid Journal   (Followers: 7)
Landscape Ecology     Hybrid Journal   (Followers: 61)
Landscapes     Hybrid Journal   (Followers: 18)
Latin American Journal of Management for Sustainable Development     Hybrid Journal  
Letras Verdes. Revista Latinoamericana de Estudios Socioambientales     Open Access  
Limnological Review     Open Access   (Followers: 3)
Living Reviews in Landscape Research     Open Access  
Local Environment: The International Journal of Justice and Sustainability     Hybrid Journal   (Followers: 8)
Low Carbon Economy     Open Access   (Followers: 4)
Luna Azul     Open Access  
M+A. Revista Electrónica de Medioambiente     Open Access  
Macquarie Journal of International and Comparative Environmental Law     Full-text available via subscription   (Followers: 7)
Madagascar Conservation & Development     Open Access   (Followers: 2)
Management International Review     Hybrid Journal   (Followers: 7)
Management of Environmental Quality: An International Journal     Hybrid Journal   (Followers: 2)
Management of Sustainable Development     Open Access   (Followers: 4)
Marine Ecology     Hybrid Journal   (Followers: 27)
Marine Ecology Progress Series MEPS     Hybrid Journal   (Followers: 34)
Marine Environmental Research     Hybrid Journal   (Followers: 31)
Marine Pollution Bulletin     Hybrid Journal   (Followers: 36)
Materials for Renewable and Sustainable Energy     Open Access   (Followers: 6)
Medio Ambiente y Urbanizacion     Full-text available via subscription  
Mediterranean Geoscience Reviews     Hybrid Journal  
Membranes     Open Access   (Followers: 3)
Metabarcoding and Metagenomics     Open Access  
Michigan Journal of Sustainability     Open Access   (Followers: 1)
Microbial Risk Analysis     Full-text available via subscription  
Microplastics and Nanoplastics     Open Access   (Followers: 1)
Mine Water and the Environment     Hybrid Journal   (Followers: 4)
Mitigation and Adaptation Strategies for Global Change     Open Access   (Followers: 8)
Modeling Earth Systems and Environment     Hybrid Journal   (Followers: 1)
Monteverdia     Open Access   (Followers: 1)
Multequina     Open Access  

  First | 1 2 3 4 5     

Similar Journals
Journal Cover
Nanotechnology for Environmental Engineering
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2365-6379 - ISSN (Online) 2365-6387
Published by Springer-Verlag Homepage  [2469 journals]
  • A study on the design education method using 3D pen in an era of
           manufacturing change

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      Abstract: Abstract With the development of 3D printing technology, there will be a lot of changes in manufacturing. Recently, research on 3D pen using 3D printing technology is increasing. Unlike 3D printing, 3D pen can print products instantly. So, 3D pen will be applied in various fields. In this study, the design education method using 3D pen was studied. The results of this study are as follows. First of all, design education using 3D pen can develop students’ creativity and problem-solving skills. In particular, this curriculum can be used in making education. The results of studies are expected to be important data for future education. Moreover, these results could be the basis for making textbooks for future schools. In the future, 3D pen should also be developed for students to use in practice.
      PubDate: 2022-06-01
       
  • Green synthesised iron oxide nanoparticles decorated on biochar for
           enhanced natural attenuation in simulated petroleum compromised soil

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      Abstract: Abstract Nanobioremediation is an emerging technique for pollution management. This study aimed to enhance the natural attenuation process during remediation of petroleum polluted soil using a nanocomposite consisting of green synthesised iron oxide nanoparticles decorated on cow bone-derived biochar. The biochar used was produced via slow pyrolysis at 500 °C under low oxygen conditions while the iron oxide nanoparticles were synthesised using extracts from leaves of the pea eggplant (Solanum torvum). The iron oxide-biochar nanocomposite (BCNP) was applied to soil in microcosms at 10% w/w and 15% w/w amendment levels, and the set-ups were monitored for 60 days. At the end of the study, the total cultivable heterotrophic bacterial abundance in the BCNP amended soils were 7.37–8.92 times greater than the observed abundance in the biochar controls. Similarly, total petroleum hydrocarbon removal levels were 28.4 and 26.2% greater (at 10% w/w and 15% w/w BCNP, respectively) than obtained with the plain biochar controls. Klebsiella pneumoniae, Pseudomonas spp. and Bacillus spp. were the predominant cultivable heterotrophic bacterial isolates while Pseudomonas spp., Acinetobacter spp. and Enterobacter spp. dominated amongst the cultivable hydrocarbon utilising bacteria. Metagenomic analysis revealed that the initial dominance of Proteobacteria and Acidobacteria phyla at the onset of the study gave way to the dominance of the Proteobacteria as the study proceeded with Pseudomonas spp. dominating at the genus taxonomic rank. The iron oxide nanoparticle decorated biochar proved effective in boosting natural attenuation in petroleum-compromised soil.
      PubDate: 2022-06-01
       
  • Synthesis, characterisation and adsorption applications of PMMA/ZnO-based
           nanocomposite material

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      Abstract: Abstract The synthesis and adsorption applications of polymethyl methacrylate (PPMA)- and zinc oxide nanoparticles (ZnO NPs)-based adsorbent (PMMA/ZnO) were investigated in this work. FESEM, EDX, FTIR and P-XRD techniques were used to characterise the PMMA/ZnO nanocomposite-based adsorbent. PMMA/ZnO was utilised in the adsorption-based removal of toxic Pb2+, Cd2+ and Cr6+ ions from aqueous solutions. PMMA/ZnO was highly capable of removing Pb2+, Cd2+ and Cr6+ ions at optimised conditions such as 60 min of agitation, 1 g of PMMA/ZnO, pH of 6 and temperature of 60 °C, respectively. Under laboratory conditions, different isotherm and kinetic models were used to evaluate the appropriateness of the adsorption process. The suitability order of isotherm models was Freundlich > Langmuir > Elovich, with rate constants of 5.216, 12.0336 and 4.926 g mg−1 min−1 for Pb2+, Cd2+ and Cr6+ ions, respectively, evaluated using the pseudo-second-order model.
      PubDate: 2022-06-01
       
  • Porous ZnO/hydroxyapatite nanomaterials with effective photocatalytic and
           antibacterial activities for the degradation of antibiotics

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      Abstract: Abstract Simultaneous photocatalytic and antimicrobial activity is considered a very promising technology for water treatment. By studying their antimicrobial activity, the present study evaluates effect of the association of porous hydroxyapatite with zinc oxide to improve the photodegradation of antibiotics in water and to trap the by-products. Coexistence in the nanocomposite of zinc oxide with porous apatite, prepared from phosphate rock, is a key factor promoting strong photocatalytic and antibacterial activities. Toxicity of the water discharged after the photocatalytic treatment was studied. Owing to the simplicity of the synthesis of ZnO–hydroxyapatite nanocomposites from Moroccan natural phosphate and their versatility, the present approach holds promise for the development of multifunctional photocatalysts and antibacterial agents for environmental applications.
      PubDate: 2022-06-01
       
  • Improving the operation safety of the high-speed train by catenary carrier
           communication and nanotechnology

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      Abstract: Abstract The birth of nanotechnology plays a leading role. China’s high-speed railway train operation has high reliability, but its safety still has defects. The main problem is that the information source received by the vehicle receiving end is single, which cannot fully guarantee the security of the information at the output end of the vehicle equipment. In this paper, some solution is presented, that is how to make full use of the carrier communication technique and nanotechnology by catenary to transmit the train operation information, take it as the redundant source of high-speed train communication, and improve the safety of the output information.
      PubDate: 2022-06-01
       
  • A study on the environmental upgrade path of the commercial district in
           Liangping District, Chongqing

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      Abstract: Abstract Liangping district, which is located in both the Three Gorges Reservoir area of Northeast Chongqing and Chengdu-Chongqing economic circle, is acting as a bridge and pivot between the “Belt and Road” and the “Yangtze River Economic Zone.” High-quality business districts play a vital role in gathering popularity, developing the economy and improving residents’ living standards. Therefore, Liangping district should make a comprehensive consideration of the development situation of business, overall planning of the whole region, construction requirements from Chengdu-Chongqing economic zone and the Three Gorges Reservoir area. From the commercial area positioning, dislocation development, intelligent promotion, mode innovation, cultural construction and other aspects, the implementation of “environmental engineering,” strengthen the overall layout, improve the supporting facilities, enrich the commercial format, strengthen comprehensive services, improve the commercial area operating soft and hard environment, realize the commercial area upgrade.
      PubDate: 2022-06-01
       
  • Safety management of environmental construction projects based on BIM and
           RFID technology

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      Abstract: Abstract With the continuous development of China's economy, the pace of urbanization is accelerating, and the upstream and downstream industrial correlation of urban engineering construction projects is even more complex. Therefore, each management link of the environmental construction project has a direct impact on the effectiveness of the project, especially for safety management. The step-wise application of BIM and RFID technologies provides a more viable method for the safety management of construction projects. This paper aims to study the safety management of construction projects based on BIM and RFID technologies. This article selects the construction project safety management as the research object, applies BIM and RFID technology to the construction project safety management process, summarizes the application of BIM and RFID technology in the construction project safety management, and designed the technical construction project safety management platform based on BIM and RFID.
      PubDate: 2022-06-01
       
  • Mechanical strength optimization and simulation of cement kiln dust
           concrete using extreme vertex design method

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      Abstract: Abstract Extreme vertex design (EVD) method was adapted for the experimental investigation involving the incorporation of industrial waste known as cement kiln dust (CKD) for concrete production; to encourage reuse and recycling of wastes and to achieve eco-friendly construction materials. This design method is mostly suited for factor levels impose with multiple constraints. Components’ constraint formulation was imposed expertly through the relevant literatures to determine the mixture-simplex bounded regions. The laboratory results obtained indicate maximum compressive-strength of 34.85 N/mm2 with concrete mixture-ratio of 13.0434%-cement, 13.043%-CKD, 26.09%-fine-aggregate, 34.78%-coarse-aggregate and 13.0434%-water while the minimum of 18 N/mm2 was obtained with mixture-ratio of 13.79%-cement, 2.299%-CKD, 39.08%-fine-aggregate, 36.78%-coarse-aggregate and 8.05%-water. The generated results were utilized for model-development and statistical-analysis. The statistical influence and diagnostic test results showed a good statistical correlation and points of great influence. The desirability-function was further deployed to achieve numerical and statistical optimization in-order to derive the optimal-solution for the factor-levels combination at 0.15:0.15:0.3:0.4 for cement, CKD, fine-aggregate and coarse-aggregate, respectively. A desirability computation result of 0.907 was obtained with optimal-response of 33.283 N/mm2. Model simulation was further carried out to test the EVD-model’s applicability using Student’s t-test and ANOVA. The results of statistical analysis indicated p-value > 0.05, showing no significant difference between the EVD-model simulated results and actual values.
      PubDate: 2022-06-01
       
  • Comparative analysis of PWM techniques for 15-level cross-connected H
           bridge inverter

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      Abstract: Abstract The total harmonic distortion of the voltage plays an important role in selecting filter components. Multilevel inverters are one of the solutions for reducing total harmonic distortion and filter components. This paper discusses about third harmonic PWM controlled three-phase 15-level cross-H bridge multilevel inverter fed induction motor. The total harmonic distortion and losses of switches are calculated for third harmonic PWM, and the same are compared with a single pulse PWM controlled 3-Ø 15-level cross-H bridge multilevel inverter fed induction motor. The simulation of the third harmonic PWM and single pulse PWM fed 3-Ø 15-level cross-H bridge multilevel inverter fed induction motor is performed in MATLAB/SIMULINK environment.
      PubDate: 2022-06-01
       
  • Degradation of 4-aminopyridine using bio-mediated Ag-doped Cu2O
           nanoparticles under visible light

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      Abstract: Bio-mediated Ag-doped cuprous oxide nanoparticles (Ag@Cu2O NPs) were synthesised using Tabernaemontana divaricate leaves extract, as a reducing agent for the reduction Ag+ to Ag0. Synthesised Ag@Cu2O NPs were characterised by several techniques such as UV–Vis spectroscopy, FT-IR and XRD. Doping Ag onto Cu2O nanoparticles reduced the bandgap of Cu2O to 1.8 eV from 2.1 eV and enhanced photocurrent. The crystallite size of prepared Ag@Cu2O NPs was estimated to be 48 nm using Scherrer’s equation. The photocatalytic activity of Ag@Cu2O NPs was tested against 4-aminopyridine under visible light. The synthesised photocatalysis showed 95% degradation efficiency and 98% chemical oxygen demand removal for 4-aminopyridine at optimized conditions (4-aminopyridine: 5 ppm, catalyst dosage: 0.8 g/L and temperature 30 °C) after 235 min of reaction time at pH 3. Graphical abstract
      PubDate: 2022-06-01
       
  • Green synthesis of silver nanoparticles from Euphorbia and its biological
           activities

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      Abstract: Abstract Nanotechnology is important in all fields of science. Silver nanoparticles, among the many metal nanoparticles, play an essential role in a wide range of applications in diverse fields. Nanoparticles are created using a variety of physical and chemical approaches. Synthesis utilising plant extracts, on the other hand, appears to be more important because it avoids the drawbacks of traditional procedures, such as time-consuming, high-energy needs, and the use of dangerous chemicals. Plant extract-based silver nanoparticle synthesis is usually eco-friendly, environmentally benign, low-cost, and readily scaled up for large-scale synthesis, and it is always preferable due to its advantages over other conventional approaches. Euphorbia plants are therapeutic as well as pharmacologically important. They contain a variety of phytoconstituents with a wide range of possible bioactivities and functional groups. Proper awareness of the participation of phytometabolites during the creation of nanoparticles is highly advised for better nanotechnology advancements. Previous research on the Euphorbia genus indicated phytoconstituents’ potential applications in a variety of disciplines. Due to the scarcity of research in this subject, the manufacture of silver nanoparticles and subsequent analysis of the role of phytometabolites will be extremely beneficial. The utilisation of several extracts from different Euphorbia plant species for the green production of silver nanoparticles is discussed here. Different phytochemicals involved in the nanoparticles’ synthetic mechanism and phytoconstituents that act as stabilising, capping agents during nanoparticle production are also described. The bioactivities of the produced silver nanoparticles varied, with antibacterial characteristics being the most important. In this review, the antifungal, antiparasitic, nematicidal, anticancer, anti-inflammatory, antiplasmodial, antioxidant, and larvicidal capabilities of biosynthesised silver nanoparticles are briefly discussed.
      PubDate: 2022-06-01
       
  • Denitrification performance of kaolin and modified kaolin for the
           treatment of nitrate contaminated water: isotherm and kinetic studies

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      Abstract: Abstract The present study focuses on nitrate removal from water using kaolin and modified kaolin in a batch system. The adsorption studies were executed to study the influence of initial pH (2.0–7.0), contact time (5–240 min), adsorbent dosage (1–30g/L), and initial nitrate concentration (50–250 mg/L) using kaolin and modified kaolin as adsorbents. The percentage removal of nitrate was noted to be maximum at pH 2.0. The maximum adsorption capacity of kaolin and modified kaolin was observed at 104.17 mg/g and 109.89 mg/g respectively. Denitrification process followed pseudo second-order kinetic model. The groundwater samples collected from 21 different regions of Bangalore city in India were analyzed for nitrate concentration. It was observed that the nitrate concentration of collected groundwater samples was ranging from a minimum of 3.42 mg/L to a maximum of 75.69 mg/L. Sample collected from Mandur area corresponds to the high nitrate concentration (75.69 mg/L). Higher percentage nitrate removal from the groundwater sample was achieved by modified kaolin (93.10%) compared to kaolin (66.86%). It can be concluded that modified kaolin has exhibited higher potential of nitrate removal compared to kaolin.
      PubDate: 2022-06-01
       
  • Visible light responsive S-Doped TiO2 nanoparticles: synthesis,
           characterization and photocatalytic degradation of pollutants

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      Abstract: Abstract Heterogeneous catalyst (TiO2) based reactions have appeared as an important destructive methodology for the removal of various organic and inorganic contaminants. The unique properties of TiO2 such as stability against photo corrosion, sufficient bandgap, easy accessibility, and self-surface cleaning make it more promising photocatalyst. However, one of the major limitations of TiO2 is broader bandgap that makes it active only in the UV region. Thus the current emphasis of research in photocatalysis field is to make titanium dioxide, a solar light receptive photocatalyst. The present study reports a greener synthetic approach for the synthesis of sulphur doped TiO2 using titanium isopropoxide and thiophenol as an initial precursors. The synthesized photocatalysts were calcinated at different temperatures and depicted by using SEM–EDS, HR-TEM, PL, UV–Vis, FT-IR, XPS and XRD. The photocatalytic response was examined for various model compounds such as Rhodamine 6G (synthetic dye), Quinalphos (an organophosphate pesticide), and Diclofenac (a pharmaceutical waste).
      PubDate: 2022-06-01
       
  • Effect of silver nanoparticles on nitrogen-cycling bacteria in constructed
           wetlands

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      Abstract: Abstract Silver nanoparticles (AgNPs) are one of the most popular engineered nanomaterials (ENMs) because of their anti-microbial properties. In wastewater treatment ecosystems, ENMs can be removed by plant uptake or adsorption on biofilms. However, AgNPs can inhibit the activities of plants and microorganisms. This review outlines the effects of AgNPs on nitrogen-cycling bacteria in constructed wetlands (CWs).. Environmental conditions like organic matter, pH, ionic strength of soil along with the size, concentration, surface coating, speciation, and aggregation of AgNPs influence the toxicity. Bacterial activity is hampered by disruption of the cell membrane and extracellular polymers, reactive oxygen species (ROS) imbalance, DNA damage, inhibition of gene expression, protein functions, and energy production. Compared to heterotrophic bacteria, generally, nitrifying bacteria are more sensitive to AgNPs. Bacterial inhibition leads to a significant decrease in community diversity and reduction in nitrogen removal efficiency (NRE). Recovery of NRE is correlated with the resistance and functional redundancy of the community. Exposure to sublethal AgNP concentrations can upregulate nitrogen-cycling genes. The hormetic response and bacterial resilience are more evident in communities with high diversity. Plants enrich the diversity of nitrogen-cycling bacteria in planted CWs in the presence of AgNPs. Compared to unplanted CWs, the planted wetlands are resistant to AgNPs and consequently exhibit a better NRE after long-term exposure. Future endeavors to analyze the influence of AgNPs should be preceded by a long-term assessment of the complex interactions in actual treatment systems that are often overlooked in studies using synthetic wastewater.
      PubDate: 2022-06-01
       
  • Improved photocatalytic efficiency of bio-synthesised SnO2 nanoparticle in
           dye degradation

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      Abstract: The main objective of this study is to examine the photocatalytic activity of SnO2 nanoparticle synthesised by utilising the leaf extract of Pithecellobium dulce as a natural oxidant. One-pot green route procedure was followed by calcination at 300 °C. The green synthesised SnO2 nanoparticle (GS-SNPs) was characterised by various analytical techniques such as UV–Vis diffuse reflectance Spectroscopy (UV–Vis DRS), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy and thermogravimetric analysis. The size and surface morphology of the particle was studied by scanning electron microscopy, transmission electron microscopy (TEM) and atomic force microscopy. From the results of XRD study, it was found that the average crystalline size of SnO2 nanoparticle (GS-SNPs) to be 5–9.5 nm. Furthermore, it was confirmed in the range of 5–10 nm as determined by TEM. The photocatalytic activity was tested with amaranth dye and methyl orange with variable concentration (5.0, 7.5, 10, 12.5 and 15 ppm) for optimisation. The efficiency of dye degradation was found to be concentration dependent, and the degradation results were better for amaranth dye than methyl orange with rate constant value of 6.3 × 10–2 and 3.0 × 10−2 min−1. The optimised characteristics are catalyst dosage as 30 mg for 60 min of exposure which resulted in 90.6% for the dye removed. From the observations, it can be concluded that GS-SNPs could open up the possibility of high value exploitation of green-based nanomaterial as efficient photocatalyst in pharmaceutical and chemical industry with minimum cost and non-hazardous environmental impacts. Graphical
      PubDate: 2022-06-01
       
  • Fabrication of ulvan-based ionically cross-linked 3D-biocomposite:
           synthesis and characterization

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      Abstract: Abstract Polysaccharides are among the multifunctional and highly abundant biomolecules of the plant kingdom. Their diversities range from being a homopolymer to heteropolymers with a vast list of applications precisely for the marine algae-derived sulfated polysaccharides. Ulvans, a green marine macroalgae-derived sulphated heteropolymer, have been modified by number of methodologies to prepare biocomposites, tissue scaffolds, hydrogels, aerogels, thin films, etc. The present study demonstrates for the first time use of ionic cross-linking using calcium as a green cross linker to construct a 3D scaffold. The assessment of cross-linking by 1H NMR shows potential involvement of methyl group of l-rhamnose, whereas surface analysis from FE-SEM-EDX rendered heterogeneous spores with a homogeneous distribution of calcium and sulphur. The characterization confirms functional group modifications taking place in the back-bone potentially due to calcium binding. The combined physico-chemical response of the scaffold makes it a potential alternative for a chemically cross-linked synthetic polymers for drug delivery, controlled release, and tissue engineering applications.
      PubDate: 2022-04-28
       
  • Photocatalytic hydrogen production on the surface of cadmium sulphide and
           other different doping nanomaterials dispersed on zinc oxide

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      Abstract: Abstract Since hydrogen currently has the potentials to satisfy the energy supplying necessities as a clean source of non-fossil fuel, hydrogen production from water splitting using synthesized semiconductor nanoparticles through a photocatalytic process reaction that is induced by employing solar energy is carried out through this research project. In order for a photocatalyst to function in water splitting and result to produce hydrogen, it ought to possess a suitable band gap. Hence, the semiconductor is utilized and doped to enhance its activity and establish higher hydrogen production efficiency. This is executed by preparing the semiconductor zinc oxide (ZnO) nanoparticles by the sol–gel method as the photocatalytic reagent and doping it with different concentrations by weight of cadmium sulphide (CdS) quantum dots in addition to silver vanadate (AgVO3) and silver phosphate (Ag3PO4) nanoparticles to enhance the hydrogen production process accomplished by the means of a sun simulator acting as the solar energy source with using methanol as hole scavenger where the hydrogen produced is evolved from the water and methanol solution mixture. The resulted volume readings of each photocatalyst were recorded and plotted versus the time to compare the water splitting rates for each photocatalyst; also, the amount of hydrogen produced from each photocatalyst was calculated. Moreover, the structures of the prepared nanoparticle samples were characterized through XRD, FTIR, SEM, EDX and mapping tests. Eventually, the results showed that the best production rate photocatalyst was the ZnO that was doped with CdS 10% concentration by weight which also produced the highest amount of hydrogen that was of a value about 1.6656 mmol min−1.
      PubDate: 2022-04-28
       
  • Green synthesis of sulfur nanoparticles using Allium sativum: Its effects
           on the growth of Pogostemon cablin Benth. and the chemical
           characterization of the patchouli oil after being harvested

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      Abstract: Green synthesis of sulfur nanoparticles was successfully carried out using sodium thiosulfate pentahydrate in the presence (gSNPs) and in the absence (SNPs) of aqueous garlic extract (Allium sativum) as well as their effect on plant growth of Pogostemon cablin Bent. The synthesized gSNPs and SNPs were characterized by FT-IR, XRD, SEM–EDX, and Nano Zetasizer. The FT-IR analysis showed that S–S bond of gSNPs and SNPs was absorbed in a wave number range of 400—500 cm−1. The XRD analysis results showed that gSNPs and SNPs have a crystal form with an average size of 45.0 and 48.0 nm, respectively. The SEM–EDX analysis showed that mass percentage of a sulfur atom of gSNPs and SNPs was 28.1% and 44.4%, respectively. Meanwhile, Nano Zetasizer analysis exhibited that gSNPs and SNPs have the zeta potential values at -10.4 and -10.3 mV, respectively. The effect of sulfur nanoparticles on plant growth of Pogostemon cablin Benth. was studied by foliar spray application at concentrations of 150, 300, and 600 ppm. The results showed that the plants treated with the sulfur nanoparticles produced healthier Pogostemon cablin Benth. plant in each of the plant growth parameters (including the height of the plant, amount of leaves, amount of stem, diameter of the stem, length of the roots, dried and wet weight of the roots, and weight of the plant). The chemical characterization of the patchouli oil after being harvested using GC–MS showed that the percentages of patchouli alcohol (C15H26O) to patchouli plants from treatment of control, IAA, gSNPs, and SNPs were 31.98%, 30.69%, 35.14%, and 35.10%, respectively. Graphical abstract
      PubDate: 2022-03-05
      DOI: 10.1007/s41204-022-00217-5
       
  • Silver nanoparticles synthesized from Launaea sarmentosa extract:
           synthesis, characterization, and antimalarial activity

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      Abstract: Abstract This paper describes a simple and effective green approach for synthesizing silver nanoparticles using Launaea sarmentosa aqueous plant extract. Phytoconstituents screening revealed the presence of tannins and phenolics, terpenoids, and alkaloids, all of which function as both bio-reductants and capping agents for silver nanoparticles formation. The influence of several experimental parameters in the synthesis of silver nanoparticles was optimized. Spectrophotometric analysis with a maximum absorbance peak of 430 nm was accomplished to confirm the successful formation of green silver nanoparticles. A range of characterization techniques was used to study the physicochemical properties of synthesized silver nanoparticles. The results demonstrated spherical and high-stability silver nanoparticles with an average diameter of approximately 30 nm. The silver nanoparticles greenly synthesized from Launaea sarmentosa extract exhibited good antiplasmodial potential against Plasmodium falciparum K1 strain with a 50% inhibitory concentration of 17.21 ± 1.18 µg mL−1 and a 100% growth inhibitor percentage of 312.5 µg mL−1. The proposed method provides a sustainable, low-cost, non-toxic, rapid, and reliable procedure to create silver nanoparticles, which could be a promising alternative treatment for malaria.
      PubDate: 2022-03-04
      DOI: 10.1007/s41204-022-00239-z
       
  • Utilization of Zn–Al–Cl layered double hydroxide as an adsorbent for
           the removal of anionic dye Remazol Red 23 in aqueous solutions: kinetic,
           equilibrium, and thermodynamic studies

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      Abstract: The Zn–Al–Cl Layered Double Hydroxide (Zn–Al–Cl LDH) was synthesized at constant pH by coprecipitation method and then used as an adsorbent for the removal of a reactive azo dye Remazol Red 23 (RR-23). The structural and morphological properties of the synthesized Zn–Al–Cl LDH were determined using X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), Brunauer–Emmett–Teller surface area, Scanning Electron Microscopy, Energy Dispersive X-ray Spectroscopy, Thermogravimetry Analysis, and Differential Thermal Analysis, and the determination of the point of zero charge pHpzc. The adsorption characteristics were studied by optimizing different parameters such as solution pH, contact time, and initial dye concentration. The maximum adsorption capacity was obtained in the pH ranging from 4 to 7. XRD and FTIR results of Zn–Al–Cl LDH before and after adsorption showed that the removal of the dye is due to its adsorption on the surface of the LDH and that there is no intercalation of the dye since no change in the basal spacing was observed. The kinetic data obtained were examined using the pseudo-first and pseudo-second-order equations. The equilibrium adsorption data were studied using the Freundlich and Langmuir models. The adsorption behavior of Zn–Al–Cl LDH fits perfectly the Langmuir isotherm and the pseudo second-order kinetic model. Thermodynamic studies revealed that the RR-23 dye adsorption on Zn–Al–Cl LDH was exothermic and governed by a physisorption \((\Delta_{{{\text{ads}}}} H^{0} < 0)\) , spontaneous \((\Delta_{{{\text{ads}}}} G^{0} < 0)\) and increased the randomness \((\Delta_{{{\text{ads}}}} S^{0} > 0)\) in the adsorbent/adsorbate system. The regeneration study was also conducted in three cycles with 98, 91, and 74% removal efficiency of RR-23. Graphical abstract
      PubDate: 2022-03-04
      DOI: 10.1007/s41204-022-00237-1
       
 
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