title: Removal of hexavalent chromium from contaminated ground water using zero-valent iron nanoparticles.
abstract: Batch experiments were conducted on ground water samples collected from a site contaminated with Cr(VI) to evaluate the redox potential of zero-valent iron (Fe(0)) nanoparticles for remediation of Cr(VI)-contaminated ground water. For this, various samples of contaminated ground water were allowed to react with various loadings of Fe(0) nanoparticles for a reaction period of 60 min. Data showed 100% reduction of Cr(VI) in all the contaminated ground water samples after treatment with 0.20 gL(-1) of Fe(0) nanoparticles. An increase in the reduction of Cr(VI) from 45% to 100% was noticed with the increase in the loading of Fe(0) nanoparticles from 0.05 to 0.20 gL(-1). Reaction kinetics of Cr(VI) reduction showed pseudo first-order kinetics with rate constant in the range of 1.1 × 10(-3) to 3.9 × 10(-3) min(-1). This work demonstrates the potential utility of Fe(0) nanoparticles in treatment and remediation of Cr(VI)-contaminated water source.
authors.affiliation: Ecotoxicology Division, Indian Institute of Toxicology Research (Council of Scientific and Industrial Research), Post Box 80, Mahatma Gandhi Marg, Lucknow, 226 001 UP, India. ritu2735@gmail.com
authors.forename: Ritu
authors.initials: R
authors.lastname: Singh
authors.forename: Virendra
authors.initials: V
authors.lastname: Misra
authors.forename: Rana Pratap
authors.initials: RP
authors.lastname: Singh
mesh_terms: D002857:Chromium / Q000032:analysis* / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods*; D040362:Geographic Information Systems; D060587:Groundwater / Q000737:chemistry*; D007194:India; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion; D007501:Iron