Open AccessA Comparative Study on Conversion of Soluble Cr(VI) into Insoluble Cr(VI) and Reduction of Cr(VI) in Contaminated Groundwater at COPR Dump Site
Author(s) -
Vanitha Murugaiyan,
S. Selvaraj,
P. Selvaraj
Publication year - 2019
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2019.21688
Subject(s) - chemistry , groundwater , chromate conversion coating , precipitation , chromium , environmental chemistry , zinc , geology , organic chemistry , meteorology , physics , geotechnical engineering
The most common methodology for removal of Cr(VI) in literatures is the combination of reduction and precipitation process. The disadvantages of this method are presence of high total dissolved solids in the treated water and sludge generation. In order to find a new solution, efforts have been focussed to convert Cr(VI) present in the groundwater, into the useful products like zinc chromate and barium chromate under appropriate conditions. The efficiency of these conversions is compared with the efficiency of the reduction and precipitation process adopted in this study, using sodium metabisulphite. These experimental studies were carried out with stimulated water containing 2000 mg/L of Cr(VI) and then extended to Cr(VI) contaminated groundwater with same concentration. The results are compared and validated through batch experiments.