Open AccessMitigation of Contamination Levels and Ecological Risk of Toxic Metal Contaminated Soil using CA-EKSR Process
Author(s) -
Reddy G Koteswara
Publication year - 2019
Publication title -
international journal of chemtech research
Language(s) - English
Resource type - Journals
eISSN - 2455-9555
pISSN - 0974-4290
DOI - 10.20902/ijctr.2019.120615
Subject(s) - human decontamination , environmental remediation , contamination , environmental science , environmental chemistry , soil contamination , electrokinetic remediation , pollution , chemistry , waste management , ecology , biology , engineering
Many studies have focussed on decontamination of the soil by incorporatingelectrokinetic technologies. However, these not considered to determine the contamination anddecontamination levels before and after treatment. We addressed this problem and determinedthe decontamination levels of toxic metals(TMs) after treatment. In this study, TMscontaminated granite mining soil was treated with the chelating agents and electrokinetic soilremediation (CA-EKSR) process. After 20 days of treatment, we determined thedecontamination levels and ecological risk indices of TMs through pollution index (PI), Geoaccumulation index (Igeo) and potential ecological risk indes (RI). The removal performance ofTMs was found in CA-EKSR (cirtric acid and EDTA as chelating agents) treatment about 5-6times ore than when conventional treatment. The overall ecological risk index (RI) was reducedfrom 224 to 35.6, after treatment with chelating agent, which indicated that the soil has lowenvironmental risk. It is observed that the CA-EKSR treatment was an effective in theremediation and mitigation of TMs from contaminated mining waste. The study is useful forthe researchers to investigate the soil quality, contamination levels and ecological risk indicesparticularly in the soil decontamination studies