Abstract
Hexavalent chromium (Cr(VI)) is toxic and generally mobile in groundwater, unlike Cr(III) which is nontoxic and typically precipitates out of the water. Zerovalent iron (ZVI) or iron filings are commonly used in groundwater remediation to reduce Cr(VI) to Cr(III). This study was designed to investigate whether mineral olivine (which has historically been commercially mined in western North Carolina) could be employed as a reducing agent in the remediation of Cr(VI). Batch experiments were conducted by mixing Cr(VI) solutions (0.5-5ppm) with two different sources of olivine as well as iron filings, and measuring the chromium remaining in solution. Samples were analyzed for Cr(VI) using the AA spectrometry. Results showed that both the iron filings and two olivine samples were effective in reducing chromium at a pH of 4. However at a pH of 6, only one of the olivine types and the iron filings were effective at reducing Cr(VI).
How to Cite
Pasour, M., (2022) “Hexavalent Chromium Reduction by Mineral Olivine”, Capstone, The UNC Asheville Journal of Undergraduate Scholarship 35(1).
4
Views
1
Downloads