Laser-induced efficient reduction of Cr(VI) catalyzed by ZnO nanoparticles

M. Qamar, M. A. Gondal*, Z. H. Yamani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

The present study demonstrates the complete removal of Cr(VI) in aqueous suspensions of zinc oxide nanoparticles using a novel laser-induced photocatalytic process without the use of any additive. The study showed that ∼95% Cr(VI) was removed within short time (60. min) of laser exposure in the presence of ZnO. However, the removal of chromium using conventional setup under identical conditions was found to be negligible. Effect of critical parameters, such as laser energy, catalyst concentration, chromium concentration, and added electron donor and acceptor on the photocatalytic reduction process was also investigated. The data regarding temporal behavior of metal removal was fitted to first-order kinetic and reaction rate was computed.

Original languageEnglish
Pages (from-to)258-263
Number of pages6
JournalJournal of Hazardous Materials
Volume187
Issue number1-3
DOIs
StatePublished - 15 Mar 2011

Bibliographical note

Funding Information:
The support by Center of Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM) is gratefully acknowledged under project # 08-NAN-93-4.

Keywords

  • Chromium removal
  • Laser applications
  • Photocatalysis
  • Semiconductor
  • Water purification

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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