Related Experiment Video
Updated: May 21, 2026

Determining the Chemical Composition of Corrosion Inhibitor/Metal Interfaces with XPS: Minimizing Post Immersion Oxidation
Published on: March 15, 2017
Effect of SO on 1,1,1-trichloroethane degradation by Fe(0) in aqueous solution
Jie Yu1, Wenxia Liu, Aibin Zeng
1Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China.
Abstract:
Sulfate in groundwater has been previously shown to change the reactivity of Fe(0) in permeable reactive barriers for reducing chlorinated organics. To better understand the effect and mechanism of SO, the degradation of 1,1,1-trichloroethane (TCA) by Fe(0) in unbuffered aqueous solutions with and without SO was investigated. In a Fe(0) -TCA-H2 O system with initial pH of 2.0 to 10.0, the maximum removal rate of TCA was achieved at the initial pH 6.0 with pseudo-first-order constant Kobs 9.0 × 10(-3) /min. But in a Fe(0) -TCA-Na2 SO4 -H2 O system, the removal rate of TCA decreased remarkably with a reduction in Kobs to 1.0 × 10(-3) /min, and the pH varied from 6.0 to 9.6, indicating an inhibition of TCA dehydrochlorination by SO. Sulfate remarkably inhibited TCA degradation via changing the route of Fe(0) dissolution. It accelerated the dissolution of Fe(0) and transformed the intermediate form Fe(OH)ads to Fe2 (SO4 )ads , which weakened the affinity between Fe and TCA, and thus depressed the degradation of TCA by Fe(0) .
More Related Videos
Related Concept Videos
E1 Reaction: Kinetics and Mechanism
Microbial Bioremediation of Pesticides
Extraction: Advanced Methods
Ladder Diagrams: Redox Equilibria
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Complexation Equilibria: The Chelate Effect
Carboxylic Acids to Acid Chlorides

