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Removal of Hexavalent Chromium from Groundwater Using Stannous Chloride Reductive Treatment

Abstract Mineral weathering and industrial activities cause elevated concentration of hexavalent chromium (Cr(VI)) in groundwater, and this poses potential health concern (>10 ppb) to southwestern USA. The conversion of Cr(VI) to Cr(III) – a fairly soluble and non-toxic form at typical pH of groundwater is an effective method to control the mobility and carcinogenic effects of Cr(VI). In-situ chemical reduction using SnCl2 was investigated to initiate this redox process using jar testing with buffered ultrapure water and native Arizona groundwater spiked with varying Cr(VI) concentrations. Cr(VI) transformation by SnCl2 is super rapid (<60 seconds) and depends upon the molar dosage of Sn(II) to Cr(VI). Cr(VI) removal improved significantly at ... (more)
Created Date 2019
Contributor Nguyen, Duong Thanh (Author) / Westerhoff, Paul K (Advisor) / Delgado, Anca G (Committee member) / Sinha, Shahnawaz (Committee member) / Arizona State University (Publisher)
Subject Environmental engineering / hexavalent chromium / in-situ chemical reduction / jar testing / stannous chloride
Type Masters Thesis
Extent 69 pages
Language English
Note Masters Thesis Civil, Environmental and Sustainable Engineering 2019
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS

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Description Dissertation/Thesis