title: Removal of Cr(VI) by nanoscale zero-valent iron (nZVI) from soil contaminated with tannery wastes.
abstract: The illegal disposal of tannery wastes at Rania, Kanpur has resulted in accumulation of hexavalent chromium [Cr(VI)], a toxic heavy metal in soil posing risk to human health and environment. 27 soil samples were collected at various depths from Rania for the assessment of Cr(VI) level in soil. Out of 27 samples, five samples had shown significant level of Cr(VI) with an average concentration of 15.84 mg Kg(-1). Varied doses of nanoscale zero-valent iron (nZVI) were applied on Cr(VI) containing soil samples for remediation of Cr(VI). Results showed that 0.10 g L(-1) nZVI completely reduces Cr(VI) within 120 min following pseudo first order kinetics. Further, to test the efficacy of nZVI in field, soil windrow experiments were performed at the contaminated site. nZVI showed significant Cr(VI) reduction at field also, indicating it an effective tool for managing sites contaminated with Cr(VI).
authors: Ecotoxicology Division, Indian Institute of Toxicology Research (Council of Scientific & Industrial Research), Post Box 80, Mahatma Gandhi Marg, Lucknow, UP 226 001, India.
authors: Ritu
authors: R
authors: Singh
authors: Virendra
authors: V
authors: Misra
authors: Rana Pratap
authors: RP
authors: Singh
mesh_terms: D002857:Chromium / Q000032:analysis / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D013633:Tanning
chemical_list: D012989:Soil Pollutants; D002857:Chromium; D007501:Iron