Capacity of Cr(VI) reduction in an aqueous solution using different sources of zerovalent irons

Jae E. Yang, Jong Sung Kim, Yong Sik Ok, Su Jung Kim, Kyung Yoal Yoo

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Zerovalent iron (ZVI) has drawn intense interest as an effective and inexpensive tool to enhance degradation of various environmental contaminants. Reduction of Cr(VI) to Cr(III) by ZVI merits environmental concern as a hazardous species is transformed into a non-hazardous one. Objectives of this research were to assess kinetics and capacity of Cr(VI) reduction by different sources of Z Vis, of which chemical parameters can base in situ application of ZVI to treat Cr(VI) contaminated water. Reduction kinetics were first-order and rapid showing that 50% of the initial Cr(VI) was reduced within 7.0 to 347 min depending on Cr(VI) concentration, temperature and ZVI source. The reduction rates were increased with decreasing the initial Cr(VI) concentrations and increasing the reaction temperatures. The J ZVI (Shinyo Pure Chemical Co., Japan) was more effective in Cr(VI) reduction than PU (Peerless Metal Powders, USA). The maximum reduction capacities of J and PU ZVIs at 25°C were 0.045 and 0.042 mmol g-1 Fe0, respectively. A relatively higher value of the net reaction energy (Ea) indicated that Cr(VT) reduction by ZVI was temperature dependent and controlled by surface properties of ZVI. Chemical parameters involved in the Cr(VI) reduction by ZVI such as temperature quotient, kinetic rates, and stoichiometry indicated that the ZVI might be effective for in situ treatment of the Cr(VI) containing wastewater.

Original languageEnglish
Pages (from-to)935-939
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume23
Issue number6
DOIs
Publication statusPublished - 2006 Nov 1

Keywords

  • Cr(VI) reduction
  • First-order kinetics
  • Reduction capacity
  • Zerovalent iron

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Capacity of Cr(VI) reduction in an aqueous solution using different sources of zerovalent irons'. Together they form a unique fingerprint.

  • Cite this