Hybrid journal (It can contain Open Access articles) ISSN (Print) 1756-8463 - ISSN (Online) 1756-8471 Published by Inderscience Publishers[451 journals]
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Authors:Luana Dalacorte, Edson Campanhola Bortoluzzi Pages: 93 - 105 Abstract: Metabasalt powder has been suggested as an agent to fix metals. The present study aimed to test the metal sorption onto metabasalt powder at different pH conditions and contact times in order to define the optimal conditions to ad/desorb copper and zinc. A competitive assay was performed using 8,945 mg/kg of copper and 11,518 mg/kg of zinc. Copper adsorption was 40.8% and 99.1% of the total concentration at pH 4.0 and 7.0, respectively, while the amounts of adsorbed zinc were 58% and 68% of the total concentration at pH 6.0 and 7.0. The maximum copper and zinc desorption magnitudes from the metabasalt were observed at pH 6.4 and 7.0, respectively, but the amounts did not represent half of the total adsorbed. These findings allow choosing effective parameter levels when metabasalt is used as an absorbent agent. Keywords: metabasalt; sorption; remediation agent; contaminated environments Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 93 - 105 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118464 Issue No:Vol. 11, No. 2 (2021)
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Authors:Subhash Kumar, V.N. Raibhole Pages: 106 - 117 Abstract: This paper focuses on the working of a two fluid gas absorption refrigeration unit, intended to operate in an atmospheric environment, with a compartment temperature of 15°C. Gas absorption systems, unlike vapour-compression systems, use a waste heat source from multi-cylinder CI engine to facilitate refrigeration. Two fluid gas absorption refrigerators use electric based heater installed generator and no moving parts, such as pumps and compressors, and operate at a single system pressure. Unlike the vapour-compression cycle, which utilises pressure gains and drops to produce refrigeration, the three fluid gas absorption cycles uses the principle of partial pressure between two fluids to create the cooling effect. This paper compares the performance of absorption refrigeration cycles that are used for refrigeration temperatures under atmospheric temperature. The corresponding results can look as if the coefficient of performance (COP) is directly proportional to the growing generator and evaporator temperatures however reductions with increasing condenser and absorbent temperatures, the COP of the system varied between 0.6 to 0.86. Keywords: coefficient of performance; COP; vapour compression refrigeration system; VCRS; vapour absorption refrigeration system; VARS; NH3-H2O; Tg; Tc; Te Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 106 - 117 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118455 Issue No:Vol. 11, No. 2 (2021)
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Authors:K.J. Sosamony, P.A. Soloman Pages: 118 - 131 Abstract: One of the major industries causing environmental pollution is the textile industry. As the biodegradability of textile effluent is low, direct biological treatment is not feasible. Hence, steps are to be taken to enhance the biodegradability before biological treatment. This study has been focused on solar photo Fenton-like process (nZVI in place of Fe<SUP align="right">2+</SUP>), named as advanced solar photo Fenton (ASPF) process, in which biologically produced nano zero valent iron (nZVI) is used. The results prove that nZVI can be synthesised successfully from Amaranthus Dubius leaf extract and it can be used effectively in the ASPF process for textile effluent treatment. Response surface methodology (RSM) with Box Behnken design (BBD) has been used for the analysis and optimisation of the process parameters in ASPF process. The biodegradability index (BI) improved from 0.21 to 0.40 under optimum conditions of pH 2.6, H<SUB align="right">2O<SUB align="right">2 62.6 mM, nZVI 38.7mg/l and contact time 15 minutes. Keywords: advanced solar photo Fenton; ASPF; biosynthesis; nano zero valent iron; nZVI; Box Behnken design; BBD; biodegradability index; BI Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 118 - 131 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118454 Issue No:Vol. 11, No. 2 (2021)
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Authors:Gabrielle Nunes Da Silva, Isabella Escobar Dos Santos, Rayssa Vogeler Berquó Jacob, Roberta Santos De Souza, LÃvia De Oliveira Ganem, Daniele Maia Bila, Sergio Machado Corrêa, Alfredo Akira Ohnuma Jr. Pages: 132 - 143 Abstract: The composition of rainwater is influenced by natural and anthropogenic sources. Here we evaluate the water after passage through a rainwater capture system (SAP) installed in the State University of Rio de Janeiro (UERJ), Rio de Janeiro in the period from November 2016 to April 2017, at points defined as first-flush 1, first-flush 2 and dead water. The fundamental parameters were pH, conductivity, total dissolved solids and turbidity by turbidimeter and multiparameter probe. It is verified that the quality of the rainwater is changed after passing through the catchment system, the results of the physical-chemical analysis indicated nonconformity with the Municipal Law of Niterói (2856/2011) and of the NBR (Brazilian Regulatory norms) 15527 standards, mainly for turbidity of 5 UNT. Microfiltration is suggested for turbidity equation. It is also recommended that an in-depth analysis should be conducted of the quality of the rainfall to characterise the samples of microbiological parameters, pollutants and metals. Keywords: water quality; rainwater harvesting; first flush Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 132 - 143 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118447 Issue No:Vol. 11, No. 2 (2021)
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Authors:Gabrielle Nunes Da Silva, Isabella Escobar Dos Santos, Rayssa Vogeler Berquó Jacob, Roberta Santos De Souza, LÃvia De Oliveira Ganem, Daniele Maia Bila, Sergio Machado Corrêa, Alfredo Akira Ohnuma Jr. Pages: 144 - 154 Abstract: Population growth and limited livable lands lead to the contradiction between man and land. Land use planning and design can alleviate the contradiction to a great extent. This paper briefly introduced geographic information system (GIS) technology. It then analysed the local land ecological sensitivity and the spatial coincidence of land use planning and design of Anxiang County, Changde, Hunan using GIS technology, and the data collected from Land and Resources Bureau. The results showed that the local land ecological sensitivity of Anxiang County was slightly high; therefore, it is necessary to pay attention to the local environmental protection when carrying out land planning. The index measurement and the distribution of spatial coincidence both demonstrated that Anxiang County protected the farmland well in the execution of land planning in 2019. Still, the excessive development of transportation and water conservancy invaded other building lands. Several improvement suggestions were put forward against the analysis results. Keywords: geographic information system; GIS; land planning; spatial coincidence; ecological sensitivity Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 144 - 154 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118461 Issue No:Vol. 11, No. 2 (2021)
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Authors:Mahdi Haroun, Abdelazim Altawil, Gammaa Osman Pages: 155 - 168 Abstract: The present study aims to examine chemical characteristics and heavy metal of tannery wastewater and sludge and to assess their influences on alterations in soil properties of disposal areas in terms of degree of heavy metal contamination and soil solution. Result revealed that soil layers exhibit greater values of soluble cations, anions, and electrical conductivity in tannery wastewater, sludge. Unlimited fluctuation in concentrations of heavy metals in soil profile was detected. Depending on estimated contamination factor (CF) and enrichment factor (EF), soil samples were found to be enriched and polluted with chromium. Simple correlation analysis showed significant progress between heavy metals and soil solution composition parameters. This proposes that both wastewater and sludge of tannery activities are accountable for altering properties of soil solution in term of chemistry and metal toxicity inducement into the soil atmosphere. Accordingly, tannery effluents, wastes, and sludge should not be allowed to be disposed into the environment without proper treatments. Keywords: tannery wastewater; tannery sludge; metals contamination; enrichment factor; contamination factor; Sudan Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 155 - 168 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118463 Issue No:Vol. 11, No. 2 (2021)
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Authors:D. Mohammad Isa, S. Abdullah, N.A. Mohd Noor, H.B. Ismail Pages: 169 - 182 Abstract: Effective microorganisms (EM) have been used for the treatment of the various types of wastewater through the enhancement of the microbes' activities, ecofriendly materials and are suitable for the removal of organic pollutants. The objectives of this study are to determine the optimum dosage of EM in mudballs and to analyse their efficiency as wastewater quality improvement. The water quality samplings were taken from the nearby sewage treatment plant and the tested parameters were BOD, COD, SS and turbidity. The results indicated the optimum number of the mudballs were two and six produced by fruit, vegetable waste and yeast which, depending on the water quality parameter, contribute to higher percentage in the reduction of SS, turbidity, COD and BOD. EM has shown the great potential as water quality improvement in wastewater and it can be used as a bioremediation product. Thus, this is part of the government's aspirations towards environmentally-friendly wastewater treatment. Keywords: effective microorganism; water quality improvement; environmentally friendly; bioremediation; mudball Citation: International Journal of Environmental Engineering, Vol. 11, No. 2 (2021) pp. 169 - 182 PubDate: 2021-10-26T23:20:50-05:00 DOI: 10.1504/IJEE.2021.118462 Issue No:Vol. 11, No. 2 (2021)
Hybrid journal (It can contain Open Access articles)
[451 journals]
