Universität zu Köln

Bhattacharya, Mainak, Shriwastav, Amritanshu ORCID: 0000-0002-1964-4207, Bhole, Shrikant, Silori, Rahul ORCID: 0000-0002-9897-801X, Mansfeldt, Tim ORCID: 0000-0002-7557-6827, Kretzschmar, Ruben and Singh, Abhas ORCID: 0000-0001-9139-2617 (2020). Processes Governing Chromium Contamination of Groundwater and Soil from a Chromium Waste Source. ACS Earth Space Chem., 4 (1). S. 35 - 64. WASHINGTON: AMER CHEMICAL SOC. ISSN 2472-3452

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Abstract

Chromium (Cr) contamination of natural resources from unregulated disposal of pretanning industrial waste, chromite ore processing residue (COPR), is a serious environmental concern, especially in developing countries. Although there have been studies on COPR characterization, the fate and transport of chromium emanating from COPR remains poorly understood. In this study, processes governing Cr contamination in groundwater and soil near known COPR disposal sites were investigated. Field sampling of groundwater, irrigated soil, and COPR was conducted near Kanpur (India) to identify the extent and forms of chromium contamination. Both dissolved and suspended fractions of groundwater were analyzed to evaluate the presence of any Cr-containing colloids. At certain locations with elevated Cr levels, the saturation state of sampled groundwater was evaluated to be near equilibrium with respect to BaCrO4(5) through speciation modeling of wet chemical data. Colloidal forms of Cr, such as BaCrO4(5) or as Cr adsorbed on other non-Cr containing phases, were suggested through measured differences in total and dissolved Cr concentrations and SEM-EDS evidence of Ba and Cr on filtrate residues. As BaCrO4(5) was not detected in COPR, the presence of these colloids in groundwater could be indicative of secondary precipitation of Cr upon interaction with Ba present in the subsurface. Rapid formation of colloidal BaCrO4(5) was also supported through controlled batch experiments with Cr(VI)- and Ba-spiked ultrapure water and groundwater. These results indicate the importance of secondary precipitation of colloidal BaCrO4(5) in determining eventual Cr(VI) solubility in aquifers impacted by Cr originating from COPR dissolution.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bhattacharya, Mainak UNSPECIFIED UNSPECIFIED UNSPECIFIED Shriwastav, Amritanshu UNSPECIFIED orcid.org/0000-0002-1964-4207 UNSPECIFIED Bhole, Shrikant UNSPECIFIED UNSPECIFIED UNSPECIFIED Silori, Rahul UNSPECIFIED orcid.org/0000-0002-9897-801X UNSPECIFIED Mansfeldt, Tim UNSPECIFIED orcid.org/0000-0002-7557-6827 UNSPECIFIED Kretzschmar, Ruben UNSPECIFIED UNSPECIFIED UNSPECIFIED Singh, Abhas UNSPECIFIED orcid.org/0000-0001-9139-2617 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-352065
DOI:	10.1021/acsearthspacechem.9b00223
Journal or Publication Title:	ACS Earth Space Chem.
Volume:	4
Number:	1
Page Range:	S. 35 - 64
Date:	2020
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2472-3452
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Geographisches Institut
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HEXAVALENT CHROMIUM; CHROMATE ADSORPTION; UTTAR-PRADESH; RESIDUE COPR; GANGA PLAIN; TANNERY; CR(VI); WATER; SOLUBILITY; KANPUR Multiple languages Chemistry, Multidisciplinary; Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/35206