Ecotoxicology Division, Indian Institute of Toxicology Research (Council of Scientific & Industrial Research), Post Box 80, Mahatma Gandhi Marg, Lucknow, UP 226 001, India.
Bull Environ Contam Toxicol. 2012 Feb;88(2):210-4. doi: 10.1007/s00128-011-0425-6. Epub 2011 Oct 14.
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).
拉尼娅（Rania）的制革废物非法处理导致六价铬（Cr(VI)）在土壤中积累，这是一种有毒重金属，对人类健康和环境构成威胁。在拉尼娅（Rania），从不同深度采集了 27 个土壤样本，以评估土壤中的 Cr(VI)水平。在 27 个样本中，有 5 个样本显示出 Cr(VI)的显著水平，平均浓度为 15.84 毫克/千克。将不同剂量的纳米零价铁（nZVI）施加到含有 Cr(VI)的土壤样本上，以修复 Cr(VI)。结果表明，0.10 g/L 的 nZVI 在 120 分钟内遵循假一级动力学完全还原 Cr(VI)。此外，为了在现场测试 nZVI 的功效，在污染现场进行了土壤堆肥实验。nZVI 在现场也表现出显著的 Cr(VI)还原，表明它是管理 Cr(VI)污染场地的有效工具。
