Volume 13, Issue 1 (3-2017)
HSR 2017, 13(1): 126-133 |
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Moazeni M, Ebrahimi A, Rafiei N, Pourzamani H R. Removal of Arsenic (III) and Chromium (VI) from Aqueous Solutions Using Nanoscale ZeroValent Iron (nZVI) Particles and Determining Adsorption Isotherms. HSR 2017; 13 (1) :126-133
URL: http://hsr.mui.ac.ir/article-1-907-en.html
URL: http://hsr.mui.ac.ir/article-1-907-en.html
1- MSc Student, Student Research Committee, Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- Associate Professor, Environmental Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease AND Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- Associate Professor, Environmental Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease AND Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract: (1093 Views)
Background: Arsenic and chromium are heavy metals and common pollutants of water and wastewater sources. Nanoscale zerovalent iron (nZVI) can remove these pollutants due to their high potency. The aim of the present study was the removal of arsenic (III) and chromium (VI) from aqueous solutions using nZVI and determining adsorption isotherms.Methods: The Design-Expert software was used to determine the effect of different parameters such as pH, initial concentration, nZVI dosage, and contact time on arsenic and chromium removal. The final concentration of metals was measured using inductivity coupled plasma (ICP). Then, the best fitted adsorption isotherms were determined.Findings: The results showed that the optimum removal of arsenic occurred in the initial concentration of 10 mg/l, time of 5 minutes, pH of 7, and nZVI dosage of 5 g/l. Arsenic removal with nZVI in different concentrations followed the Langmuir isotherms. The arsenic response occurred rapidly with high concentration of nZVI in neutral environment. Arsenic removal efficiency had an inverse relationship with increased concentration. The chromium removal efficiency with nZVI was low.Conclusion: The results showed that nZVI had high efficiency in arsenic removal from aqueous solutions. Therefore, it can be used for the removal of this metal from polluted water and industrial wastewater. Nevertheless, chromium removal efficiency was low with nZVI.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2021/01/10 | Published: 2021/01/10
Received: 2020/07/16 | Accepted: 2021/01/10 | Published: 2021/01/10
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