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KINETICS OF TRICHLOROETHENE REDUCTION BY ZEROVALENT IRON AND TIN: PRETREATMENT EFFECT, APPARENT ACTIVATION ENERGY, AND INTERMEDIATE PRODUCTS
Citation:
Su, C. AND R W. Puls*. KINETICS OF TRICHLOROETHENE REDUCTION BY ZEROVALENT IRON AND TIN: PRETREATMENT EFFECT, APPARENT ACTIVATION ENERGY, AND INTERMEDIATE PRODUCTS. ENVIRONMENTAL SCIENCE & TECHNOLOGY 33(1):163-168, (1999).
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The degradation of trichloroethene (TCE) at 2 mg L-1 in headspace free aqueous solution by zerovalent iron (Feo) and tin (Sno) was studied in batch tests at 10, 25, 40, and 55 degrees C and HCI-treated Feo and Sno at 25 and 55 degrees C. The HCI-washing increased metal surface area and observed rate constant (k) values but generally decreased ksa values. Our results indicate that TCE reduction by Feo and Sno is likely controlled primarily by chemical reaction-limited kinetics rather than by mass transport of the TCE to the metal surface. Both reductive B-elimination reaction and hydrogenolysis reaction are likely involved in the reduction of TCE by both Feo and Sno.
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KINETICS OF TRICHLOROETHENE REDUCTION BY ZEROVALENT IRON AND TIN: PRETREATMENT EFFECT, APPARENT ACTIVATION ENERGY, AND INTERMEDIATE PRODUCTS