|
International Journal of Environmental Science and Technology
Journal Prestige (SJR): 0.6  Citation Impact (citeScore): 2 Number of Followers: 6  Hybrid journal (It can contain Open Access articles)ISSN (Print) 1735-1472 - ISSN (Online) 1735-2630 Published by Springer-Verlag  [2469 journals]
|
- Correction to: Identification and salt tolerance evaluation of endophyte
fungi isolates from halophyte plants-
Free pre-print version: Loading...
Abstract: Abstract There was a mistake in the name of affiliation. It is written Bu Ali-Sina university, but it must be Bu-Ali Sina University ( the place of).
PubDate: 2022-07-01
-
- Correction to: A study on environmental issues of blasting using advanced
support vector machine algorithms-
Free pre-print version: Loading...
PubDate: 2022-07-01
-
- Correction to: Salinity‑based spatial evaluation of groundwater
quality for agricultural use-
Free pre-print version: Loading...
PubDate: 2022-07-01
-
- Correction to: Electrochemical mineralization of abattoir wastewater with
continuous system-
Free pre-print version: Loading...
PubDate: 2022-07-01
-
- Correction to: Treatability study of synthesized silica nanoparticles to
reduce pollution load of industrial wastewater-
Free pre-print version: Loading...
PubDate: 2022-07-01
-
- Correction to: Treatment of soluble coffee industrial effluent by
electro‑coagulation–electro‑oxidation process: multiobjective
optimization and kinetic study-
Free pre-print version: Loading...
PubDate: 2022-07-01
-
- Use of silicate by-products in water treatment processes and development
of eco-friendly self-polishing antifouling coatings-
Free pre-print version: Loading...
Abstract: Abstract The production waste involvement in processing and recycling—one of the urgent tasks in the development of environmentally oriented and resource-saving technologies. In this work, two types of silicate-containing materials of plant (silicon dioxide from rice husk) and technogenic (calcium hydrosilicate) origin are studied as sorbents for removal of heterotrophic bacteria from water and as fillers for eco-friendly marine antifouling coatings. Characterizations (morphology, chemical composition, specific surface area, zeta-potential), bacterial adsorption performance and prepared samples efficiency in antifouling coating were investigated. The results showed that the sample of calcium hydrosilicate obtained from technogenic raw materials has a macroporous needle-like structure and characterized by high removal efficiency to Escherichia coli and Bacillus subtilis in 0,05 M NaCl. Sample of biogenic silicon dioxide characterized by globular micromorphology with high value of specific surface area. Incorporation of inorganic filler particles of biogenic and technogenic samples in the coating enhanced the paint hardness. Improved antifouling performance was shown for coatings with SiO2 from rice husk coupled with bacterial antifouling extract during 9 months of field test.
PubDate: 2022-07-01
-
- Analysis of temporal and spatial changes of precipitation and flow rate in
arid regions with a statistical approach (case study: Central Plateau
catchment area of Iran)-
Free pre-print version: Loading...
Abstract: Abstract One of the characteristics of arid and semi-arid regions is low rainfall and lack of uniform distribution throughout the year, which has a direct effect on water resources in these regions. In this research, daily precipitation and flow rate data of 39 meteorological stations and 9 hydrometric stations in the period 1994–2015 have been used. To evaluate seasonal and annual changes, the average data was calculated, and also MK and SQMK tests were used to detect the type of trend and mutations of changes. Sen slope, correlation, and Pettitt tests were used to determine the slope of changes, type of relationship, and also to determine the breaking point in the data time series, respectively. The results show that in all seasons, Tashk, Bakhtegan, and Maharloo sub-basins had the highest average rainfall; however, flow rate and precipitation changing curve in this region has decreased. The time-changing curve in precipitation is decreasing in winter and spring and increasing in summer and autumn. Thus, the spatial study of the udic moisture regime shows an increase in systems' activity that affects the region in the hot (summer) and cold (autumn) seasons. The trend of leap changes in winter and summer (autumn) in 7 sub-basins with 95% confidence level has been decreasing (increasing) which has decreased (increased) the river water flow in these areas. The highest percentage of decreasing and increasing changes in precipitation is in region 9 with values of − 6.66 and 2.55. The trend of leap changes in annual precipitation and flow rate in 5 sub-basins with a 95% confidence level has been reduced. The decrease in rainfall in areas 8 and 9 have had a direct effect on flow rate and has caused a significant decrease. The correlation between rainfall and flow is positive in all sub-basins and the highest coefficient of determination is in regions 3 and 9 with 40%.
PubDate: 2022-07-01
-
- Automatic identification and tracking of meso-scale eddies in the Persian
Gulf using the pattern mining approach-
Free pre-print version: Loading...
Abstract: Abstract Meso-scale eddies with a diameter of less than 150 km and a time-scale of about one month are in fact rotations (distortions) which are observed in the continuous spatio-temporal fluid field as an evolving pattern over space and time. Ubiquitous eddy fields, including coherent vortices, are important in all aspects of oceanography such as biological, chemical and physical and have major effects on marine ecosystem and adjacent lands. In the present study, using pattern mining approach, the eddy identification automatic algorithm in the Persian Gulf called "Persian Gulf Eddy Scan" was developed and implemented in MATLAB. In order to prepare the input data for the aforementioned algorithm, first the ROMS numerical model with climate forcings was implemented for the Persian Gulf. The algorithm input data include average daily free surface water height, sea surface temperature and salinity with a grid resolution of 5 km. Finally, using this algorithm, 48 meso-scale eddies (including cyclonic and anti-cyclonic) with a lifespan of at least 3 weeks were identified and tracked automatically in the Persian Gulf for one year. The high compliance of the results with the former studies shows its capability in detecting meso-scale eddies.
PubDate: 2022-07-01
-
- Assessing the effectiveness of magnetic nanoparticles
coagulation/flocculation in water treatment: a systematic literature
review-
Free pre-print version: Loading...
Abstract: Abstract In this study, a systematic review was performed based on the publications, which report applications of magnetic nanoparticles in coagulation/flocculation technology for water treatment. Through a series of screening steps, eight themes were developed, which composed of 62 relevant articles. The application of magnetic coagulant/flocculant and their effectiveness in water treatment were discussed based on the themes. The findings explained the roles and benefits of integrating magnetic nanoparticles in coagulation/flocculation in water treatment process, as follows: (1) ability to reduce the utilization of conventional coagulant/flocculant due to high charge density provides by magnetic nanoparticles (Fe2+ and Fe3+); (2) shorten the duration of coagulation/flocculation process due to magnetic dipole attraction between magnetic nanoparticles and destabilized pollutants; and (3) recovery of used/exhausted magnetic coagulant/flocculant can be achieved using an external magnetic field, thus reducing materials cost. In-depth studies on magnetic flocs physico-chemical characteristics are recommended for further studies to enable the understanding of the fundamental mechanism of the coagulation/flocculation process. The toxicological and economic implications related to magnetic coagulation/flocculation applications in wastewater treatment are also recommended for investigation.
PubDate: 2022-07-01
-
- Investigation of design configurations and effective parameters on
productivity enhancement of vertical diffusion solar stills-
Free pre-print version: Loading...
Abstract: Abstract Solar distillation is one of the most promising solutions to provide freshwater in limited-population communities with high availability of solar radiation and poor accessibility to safe and clean water. Until now, several types of solar stills have been developed including wick-type stills, stepped stills, inclined and double-slope stills, tubular stills, and pyramid stills. Among them, vertical diffusion solar stills (VDSSs) have been newly developed, offering several priorities over conventional types. This study presents a detailed review of VDSSs by investigating effective parameters and employed techniques to enhance the productivity of these solar stills. For this purpose, design factors along with operational parameters including heat energy input, type of carrier gas, basin water depth, and feedwater flow rate are studied and profoundly discussed. Additionally, enhancement techniques including feedwater preheating, shape modifications, waste heat utilization, and integration with reflectors are studied. According to the literature, the productivity of VDSSs is enhanced by a reduction of the diffusion gap and a decrease in the number of effects. In some studies, the use of waste heat and electricity as energy inputs has led to higher productivity in comparison with solar energy. Moreover, considering design factors, a modified configuration can increase productivity by 44%. In this review, the environmental and economic aspects of VDSSs are also discussed. Numerical analyses have predicted that a passive VDSS with a multiple-chamber configuration and 13.85% exergy efficiency could cut 67.93 tons (average) of CO2 emission during its 20-year lifetime, while its financial payback time is 0.63 years. The studies have also demonstrated that an optimized VDSS can reach the water price of 6.1 USD/m3 which makes this technology more attractive than other low-capacity stills from economic aspects.
PubDate: 2022-07-01
-
- Detection and remediation of bisphenol A (BPA) using graphene-based
materials: mini-review-
Free pre-print version: Loading...
Abstract: Abstract The widespread use of bisphenol A (BPA), a plastic additive, is becoming a troubling trend due to its harmful effects on the environment. To date, graphene-based materials (GBMs) have piqued interest among researchers in the detection and remediation of BPA attributed to their salient properties of having large surface area, high conductivity, high functionalities, etc. Recent progress in GBMs has provided researchers with a wide array of synthesis techniques for various applications. Unfortunately, literature pertaining GBMs lagged in providing up-to-date research in BPA detection and remediation. Often, published review articles focused on the wide array of pollutants detection and remediation without a specific focus on a single pollutant. Hence, this review intends to reduce the knowledge gap by focusing on the recent studies pertaining usage of GBMs applications as electrochemical-based sensors and remediators via adsorption and photocatalysis of BPA. In sensing applications, GBMs sensors have evolved to be among the preferred choice for the detection of BPA. Provided that ample comprehensive reviews on the usage of GBMs as adsorbents and photocatalyst for various pollutants have been previously published, we focused our discussion solely on BPA as the model pollutant by providing up-to-date information on their synthesis route and performance ability. Certainly, this review will be useful to new entrants and experienced researchers intending to employ GBMs as the material of interest for the detection and remediation of BPA.
PubDate: 2022-07-01
-
- Urban and agricultural environmental geochemistry and identification of
heavy metals in the soil of Sari City (Mazandaran Province, Iran)-
Free pre-print version: Loading...
Abstract: Abstract Urban geochemistry is the knowledge of applying the principles of geochemistry to find out the cause of the distribution of chemical elements in the ecosystem and to discover its impact on the health of living organisms. There are over 3000 years that cities have been built around the world and home to large numbers of people. It is predicated that the growing trend of population and urbanization reach to 60% until 2030. In general, urbanization means the spatial and economic concentration of people. Rapid-scale changes such as earthquakes, subsidence, and flooding in the natural environment concern people today, but the consequences of overexposure to chemical elements, organic material, and heavy metals such as mercury, lead, or dioxins causing permanent handicap are not known for people. Organisms are always in exchange of elements with the environment and human health requires receiving essential and nonessential elements in certain concentrations, and more or fewer elements in the human body will cause disease. Due to the importance of determining the concentration of heavy and toxic elements in urban soil sources, this study was conducted to identify geochemical contaminants in the soil of the Sari City area. The concentration of heavy metals with special importance of environmental aspect was sampled using the soil sampling standard in 196 stations from both topsoil and deep soil. Then, preparing and using the ICP-OES (Germany-G mbh) instrument was chemically analyzed. After processing the data and preparing environmental geochemical maps, metals affecting the pollution of urban and suburban soils of Sari City, which is used for agriculture and paddy, were identified. The results show that the lead concentration in the topsoil and deep soil does not have the same correlation and there is a possibility of differences in the origin of lead in the soil at these two depths. The concentration of arsenic and chromium at these two depths has the same correlation, and this probably confirms the same origin of these elements in the soil. In topsoil, the maximum correlation is seen between iron, vanadium, and aluminum. While in deep soil, the maximum correlation is related to arsenic, cadmium, copper, zinc, and potassium. Calculation of the index of geoaccumulation of elements shows that cadmium, potassium, and magnesium are in the class of non-contaminated to moderate contamination. Aluminum, arsenic, calcium, iron, manganese, and phosphorus are in the class of moderate contamination and in the class of moderate to high contamination. Also, chromium, copper, nickel, vanadium, and zinc are in the high contamination class and barium is in the high contamination to extreme contamination class. The results of calculating the pollution index also show that in three sampling sites in the southwest of the region, the area of Barik Absar and Sorkh Kala villages in the southeast of Nudeh region and Khan Abasi village, the pollution index is in the moderate risk class probably due to its proximity to wood and paper industries.
PubDate: 2022-07-01
-
- Bioconversion of animal hair waste using salt- and sulphide-tolerant
Bacillus sp. KLP1 and depilation using keratinase-
Free pre-print version: Loading...
Abstract: Abstract Keratinase is a potential industrial enzyme for handling keratinaceous solid wastes and also a cleaner dehairing alternative to chemical methods in tanneries. The cleaner technologies towards circular economy approach are gaining importance in leather manufacturing sector. In this study, a new bacterial strain Bacillus sp. KLP1, exhibiting high tolerance to sodium chloride and sodium sulphide, was isolated. This new strain was effectively used for degrading the animal hair waste and also as a biocatalyst for removal of hair (dehairing) from sheep skins. The strain completely degraded the hair and produced 2600 U/ml of keratinase under optimized conditions within 72 h. The crude keratinase exhibited an optimal activity at pH 9 and 60 °C. It also showed tolerance to 0.6 M NaCl and 0.012 M Na2S. The keratinolytic protease showed complete hair removal under the industrial conditions at pH 9 within 9 h. In addition, the crude keratinase completely hydrolysed the sheep hair into free amino acids in 16 h. These results clearly show the use of crude keratinase for both dehairing of skins and also hydrolysis of hair to amino acids addressing eco-processing and solid waste management in tanning industry. Thus, the use of the new strain in leather processing leads to sustainable solid waste management and cleaner dehairing process through an environmental-friendly holistic approach alternative to chemical-based leather processing.
PubDate: 2022-07-01
-
- Treatability study of synthesized silica nanoparticles to reduce pollution
load of industrial wastewater-
Free pre-print version: Loading...
Abstract: Nanomaterials hold great potential to reduce pollution load from industrial wastewater. The silica nanoparticles (SNPs) were synthesized by sol–gel method and characterized by FTIR spectroscopy, XRD analysis and UV–visible spectroscopy. These SNPs were applied on industrial wastewater for reduction of pollution load, collected from Blund Dyestuff industry. To calculate treatment efficacy all parameters like color, total dissolve solids and conductivity were measured before and after treatment. Response surface methodology (RSM) was applied to design reaction layout for five groups of synthesized SNPs to evaluate the best among all. SNPs were also used in combination with natural coagulant; Potassium Aluminum Sulfate (alum) which boosted the activity of synthesized SNPs. It was observed that silica nanoparticles (SN-3) calcinated at 700 °C showed better results among the five types of SNPs. It reduced color up to 75%, conductivity 25% and TDS up to 35% at dose 0.16 g/100 ml of wastewater, 4 h contact time and 8 pH of original solution along with 8 mL of 10% alum solution. Other groups of SNPs showed reductions as well but lesser, as compared to SN-3. Graphical abstract
PubDate: 2022-07-01
-
- Investigation on microstructure and selected properties of aluminum
oxide–copper–nickel ceramic–metal composites-
Free pre-print version: Loading...
Abstract: Abstract A new ternary system of ceramic–metal composites has been fabricated from alumina, copper, and nickel powders by the slip casting method. The research aimed to avoid copper leaking during the sintering process of the formation while processing the CuNi phase. Five different compositions were examined, differing in the ratio of nickel to copper. Stable slurries with good casting properties were prepared for all compositions. The final composites after the sintering process were characterized by a homogeneous distribution of the metallic phase, but they differed in the microstructure characteristics. The addition of nickel limits the outflow of the liquid phase (copper) during sintering but does not eliminate it. This resulted in a reduction in the hardness of the samples compared to the reference material.
PubDate: 2022-07-01
-
- Satellite-based monitoring of lake Urmia basin health with focus on its
ecosystem regulating services by applying total ecosystem health (TEH)
model-
Free pre-print version: Loading...
Abstract: Abstract In recent decades, most of the natural and semi-natural ecosystems around the world have experienced excessive environmental loads due to human unsustainable activities that threaten their health and sustainability. Accordingly, the idea of ecosystem health has been proposed to monitor simultaneously the structure, function as well as the services that an ecosystem provides. In this research, moderate resolution imaging spectroradiometer 8-day land surface temperature product was used to measure temperature and land cover changes of Lake Urmia Basin for three months of June, July and August in a time period of 2000–2018. Time series data analysis was carried out using linear regression, Fourier series and Mann–Kendall test. Moreover, Moran index was used to analyze changes of the spatial pattern of indicators. To show the influence of Lake Urmia ecosystem services on its overall health, Total Ecosystem Health model was established by introducing normalized difference vegetation index, lake temperature, Moran index and temperature of the basin as indicators of Vigor, Structure, Resilience and Ecosystem Services, respectively. Based on output of the model, 54, 41 and 4% of the regions have obtained weak, moderate and strong ecosystem health, respectively. The results showed that despite the moderating role of Lake Urmia as a temperature regulator for its surrounding areas especially within 10 km, the decline of ecosystem health status in 95% of regions has occurred during the years 2000–2018. Therefore, to benefit from the ecosystem regulating services, the sustainability of other components involved in the total ecosystem health should be also ensured.
PubDate: 2022-07-01
-
- Purification of filtering drainage wastewater of solid waste landfills
with modified coagulant solutions-
Free pre-print version: Loading...
Abstract: Abstract This article presents the experimental studies results of the filtering drainage wastewater purification of solid waste landfills with modified reagent solutions. Experimental studies were conducted at solid waste landfills in Ukrainian cities. Modification of the coagulant solution was conducted in a special device, which provides for the creation of ionic associates resulting from magnetic treatment and their fixation with anodically dissolved iron. The effect of the modified coagulant solution was substantiated theoretically at the wastewater treatment process. The effect of the modified coagulant solution was studied to the granular medium protective effect increase and the time of the limiting head losses reach at rapid filters during the filtrate tertiary treatment of solid waste landfills. It was found that the modified coagulant solution use makes it possible to intensify the processes of wastewater treatment in solid waste landfills by an average of 25–30%. The dependence of predicting the changes in biochemical oxygen demand of treated wastewater was proposed to confirm the technological procedure for the filtration wastewater purification from solid waste landfills using a modified coagulant solution and biodisks.
PubDate: 2022-07-01
-
- Investigation on baler technology for ex situ paddy residue biomass
management with energy consumption analysis for wheat establishment-
Free pre-print version: Loading...
Abstract: Abstract A study was conducted on implementation of baler technology for ex situ management of paddy residue biomass along with the comparison of energy consumption in wheat establishment under three field mechanical treatments MT2, MT3 and MT4 with MT1 (farmer’s practice). During the study, it was observed that effective field capacity, average bale density, of baler machine was maximum for MT3. Comparable grain yield and total return were observed in MT3 and MT2. Benefit/cost ratio was maximum in MT2 and minimum in MT1. The maximum (3286.22 MJ.ha−1) and minimum (1959.02 MJ.ha−1) energy consumption was observed in MT1 and MT2, respectively. The component of direct and non-renewable energy sources was maximum (3043.29 and 3257.76 MJ.ha−1) in MT1 and was minimum (1778.31 and 1943.66 MJ.ha−1) in case of MT2. The maximum CO2 emission due to machinery and fuel input was estimated in MT1. The results indicate that ex situ management of paddy residue biomass by mechanical collection of biomass with baler technology and sowing of wheat afterwards with NTD is beneficial alternative to farmer’s practice. It helps in avoidance of on-farm burning of paddy residue causing abatement in environmental pollution and makes the availability of residue biomass by storing it in the form of bales for more suitable end use than on-farm burning.
PubDate: 2022-07-01
-
- Treatment of soluble coffee industrial effluent by
electro-coagulation–electro-oxidation process: multiobjective
optimization and kinetic study-
Free pre-print version: Loading...
Abstract: Abstract This study examines the integrated electro-coagulation–electro-oxidation (EC–EO) process as an alternative for the treatment of an industrial effluent originating from a soluble coffee production. Experiments were carried out in a laboratory-scale batch cell reactor. Monopolar configuration of electrodes was employed (EC: anode: iron and cathode: stainless steel; EO: anode: boron-doped diamond-Si and cathode: stainless steel), operating in galvanostatic mode. The effect of main operation parameters on decolorization, chemical oxygen demand (COD) and total organic carbon (TOC) degradation and total operation costs was studied. The experimental design, analysis of variance, response surface methodology and constrained optimization algorithms let to establish the most effective operation conditions as follows: for EC (support electrolyte = 4.32 g of Na2SO4/L; current density (J) = 150 A/m2; gap between electrodes = 3 mm; stirring velocity = 350 RPM; electrolysis time (t) = 60 min; and EC’s initial pH (pHi, EC) = 4.71 (the pH of raw wastewater)); and for EO (J = 300 A/m2; t = 100 min; gap between electrodes = 3 mm; stirring velocity = 125 RPM; and pHi, EO = 7.0). The integrated EC–EO process let to accomplish ca. 98% decolorization, ca. 73% of both COD and TOC removal, more oxidized (Average Oxidation State = 0.149), biocompatible (BOD5/COD ratio = 0.404) and less toxic effluent (median lethal concentration of an analyte which causes 50% population death, LC50 lower than 126.43 ppm of raw wastewater), generating 3.782 g/L of sludge, with total operation costs of 8.43 USD/m3. During EC, contaminants with molecular weight (MW) higher than 30 kDa were effectively decomposed. The integrated EO process additionally let to break down pollutants with MW in the range of 5 to 10 kDa. The EC–EO total operation time of 160 min. was required to meet Colombian permissible discharge limits.
PubDate: 2022-07-01
-
