Numerical Implementation of Electrokinetics for Removal of Heavy Metals from Granite Waste

Document Type : Research Article

Authors

Department of Biotechnology, Koneru Lakshmaiah Education Foundation (Deemed to be a University), Green Fields, Vaddeswaram-522502, Guntur, Andhra Pradesh, INDIA

Abstract

The goal of the study is to incorporate the electrokinetic models and estimate the remediation time for maximum removal of Heavy Metals (HMs) from polluted soils. Most of the conventional electrokinetic technologies have not considered the electrokinetic models in the removal of HMs from polluted soils. We addressed this problem and incorporated the electrokinetic and applied it to the experimental ElectroKinetic Soil Remediation (EKSR) process particularly, to extract the numerical data between the removal performance of HMs versus remediation time with the help of the MATLAB program. In the experimental study, chelating chemical agents (citric acid and ethylenediaminetetraacetic acid (EDTA)) were used in EKSR process under a constant voltage gradient (2V/cm) for the removal of Chromium (Cr), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn) and Manganese (Mn) ions from granite dump soil. We experimentally investigated that the removal performance of HMs in chelating agents enhanced EKSR was about 6 to7 times more than when unenhanced in 20 days of treatment. Furthermore, we estimated the remediation time of about 52 to 54 days for the complete removal of HMs using electrokinetic models. The study may be useful for the researcher particularly, in soil decontamination studies to overcome the uncertainty in the process optimization and scale up the process to the pilot plant and field level. 

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References

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