Reductive elimination of chlorinated ethylenes by zero-valent metals

Article Abstract:

Halogenated ethylenes undergo reductive beta-elimination to alkynes under environmental conditions. To test this hypothesis, zero-valent metals such as iron and zinc were used to degrade contaminants such as dichloroethylenes and chlorinated ethylenes, respectively, under controlled conditions. The results confirmed previous findings that reductive beta-elimination pathways are involved in the reaction of chloroethylenes with zero-valent metals.

Biodegradation, Elimination reactions

---

Reductive dechlorination of tetrachloroethylene and trichloroethylene catalyzed by vitamin B12 in homogeneous and heterogeneous systems

Article Abstract:

An approach for the treatment of wastewaters containing trichloroethylene (TCE) and tetrachloroethylene (PCE) was evaluated. TCE and PCE were treated using homogeneous and heterogeneous vitamin b12 systems in a batch experiment using titanium(III) citrate as reductant. Carbon mass recovery from TCE and PCE reduction was approximately 89% and 81-84%, respectively, relative to the control for both systems. Overall, reduction of PCE occurred much more rapidly than reduction of TCE. The degradation of TCE was faster in the heterogeneous system than in the homogeneous system. The reactions were suggested to have taken place ia sequential hydrogenolysis.

Usage, Bioremediation, Sewage, Oxidation-reduction reaction, Oxidation-reduction reactions, Vitamin B12, Biological sewage treatment

---

Similar abstracts:

• Abstracts: Reductive dechlorination of cis-1,2,-dichloroethene and vinyl chloride by "dehalococcoides ethenogenes."(dechlorinating chloroethenes)(Statistical Data Included)
• Abstracts: Electrochemical and column investigation of iron-mediated reductive dechlorination of trichloroethylene andn perchloroethylene
• Abstracts: The decision Delphi as a tool of technology policy - the Austrian experience
• Abstracts: Dynamic sorptive behavior of tributyltin on quartz sand at low concentration levels: effect of pH, flow rate, and monovalent cations

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.