Evaluation of Enhanced Electrokinetic Remediation of Arsenic from Cold Filter Cake: Zinc-Leaching Sediment

AbstractIn recent years, mining pollution has become a serious worldwide public health concern. One major issue in this field is concerned with arsenic-contaminated sediment. This paper, therefore, intends to determine the extent to which enhanced electrokinetic (EK) remediation is effective for rem...

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Bibliographic Details
Published in:Journal of environmental engineering (New York, N.Y.) N.Y.), 2022-12, Vol.148 (12)
Main Authors: Asadollahfardi, Gholamreza, Yazdani, Mahdie, Sarmadi, Mohammad Sina, Khodadadi Darban, Ahmad
Format: Article
Language:English
Subjects:
Acetic acid
Arsenic
Arsenic removal
Caustic soda
Citric acid
Contaminated sediments
Edetic acid
Efficiency
Electric potential
Electrokinetics
Evaluation
Filter cake
Industrial pollution
Leaching
Metal concentrations
Pollutant removal
Pretreatment
Public health
Remediation
Sediment pollution
Sodium hydroxide
Soil contamination
Technical Papers
Voltage
Zinc
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Summary:AbstractIn recent years, mining pollution has become a serious worldwide public health concern. One major issue in this field is concerned with arsenic-contaminated sediment. This paper, therefore, intends to determine the extent to which enhanced electrokinetic (EK) remediation is effective for remedying a case study of arsenic-contaminated sediment. The first section of this paper is devoted to determining the best enhancement agent at various solution concentrations and better discovering soil–metal action and reaction by leaching experiments. The sediment was collected from the zinc processing plant cold filter cake (CFC) in Shams Abad Industrial City, Iran, with a 5,700  mg/kg concentration of arsenic. In the second section of the study, ethylenediaminetetraacetic acid, citric acid, and sodium hydroxide as electrolyte conditioning solutions and sodium hydroxide for pretreatment have been evaluated as enhancement techniques for the remediation of arsenic-contaminated sediment during the electrokinetic method in tests with a duration of 8 days. Also, increasing the voltage gradient from 1 to 1.5  V/cm was assessed as another enhancement technique for improving the electrokinetic removal efficiency of arsenic. Finally, the result of experiments showed no significant increase in arsenic removal efficiency in using pretreatment and increasing the applied voltage; however, interestingly, using citric acid 0.5 M as the catholyte solution enhanced the removal efficiency up to 33.51%.
ISSN:0733-9372
1943-7870
DOI:10.1061/(ASCE)EE.1943-7870.0002077