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      Degradation of trichloroethylene by Fe(II) chelated with cross-linked chitosan in a modified Fenton reaction

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      Journal of Hazardous Materials

      Elsevier BV

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          Abstract

          Degradation of trichloroethylene (TCE) by a modified Fenton reaction was investigated in aqueous solution. Fenton reaction can be significantly enhanced in the presence of Fe(II) chelated by cross-linked chitosan (CS) with glutaraldehyde (GLA) at neutral pH. A remarkable oxidative degradation of TCE (1.838 h(-1)) was observed in the modified Fenton system with Fe(II)-CS/GLA (10 mM and 2 g L(-1), respectively) and H(2)O(2) (318 mM), while no significant degradation (0.005 h(-1)) was observed in the classic Fenton reaction system with Fe(II) (10 mM) and H(2)O(2) (318 mM) at pH 7 in 5 h. The kinetic rate constants for the degradation of TCE in the modified Fenton system was dependent on the initial suspension pH, Fe(II) loading, CS/GLA dosage, and concentration of H(2)O(2). We observed the formation of surface Fe(II)-CS/GLA complex using microscopic analyses and identified Fe oxidation (Fe(II) to Fe(III)) coupled with H(2)O(2) reduction on the Fe(II)-CS/GLA surfaces during the modified Fenton reaction. Copyright 2010 Elsevier B.V. All rights reserved.

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          Author and article information

          Journal
          Journal of Hazardous Materials
          Journal of Hazardous Materials
          Elsevier BV
          03043894
          June 2010
          June 2010
          : 178
          : 1-3
          : 187-193
          Article
          10.1016/j.jhazmat.2010.01.062
          20129729
          © 2010

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