Reaction of 1,1,1,-tricholoethane with zero-valent metals and bimetallic reductants

Article Abstract:

An examination of the reaction of 1,1,1-trichloroethane (1,1,1-TCA) with zero-valent metals showed that the assumed stepwise hydrogenation of 1,1,1-TCA to result in its eventual degradation to ethane was not observed. Zinc reacting with 1,1,1-TCA yielded ethane and 1,1-dichloroethane (1,1-DCA), while reaction with iron, nickel/iron and copper/iron resulted in the formation of cis-2-butene, ethylene, and 2-butyne. The reaction products were consistent with a reduction scheme characterized by successive one-electron reductions to form radicals and carbenoids, that consequently form some of the final products.

Organic water pollutants, Organic water pollution, Aquifers

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Pathways of chlorinated ethylene and chlorinated acetylene reaction with Zn(0)

Article Abstract:

Zinc was used to determine the reaction of zero-valent metals with water contaminants such as chloroethylenes and chloroalkanes to formulate a new method for treating polluted groundwater. Results showed the reduction of tetrachloroethylene and trichloroethylene to have negative results due to the formation of byproducts such as trans-dichloroethylene, considered a tougher species. However, environmental gains can be achieved by bypassing the development of harmful byproducts.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Chlorinated Hydrocarbons NEC, Water, Underground, Groundwater, Chlorocarbons

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Significance of trophic transfer in predicting the high concentration of zinc in barnacles

Article Abstract:

Researchers from the Hong Kong University of Science and Technology determined the rate of assimilation of zinc by barnacles (Balanus amphitrite) which were collected from several sites in Hong Kong and Southern China. A radiotracer technique was used to determine the rate of zinc assimilation.

China, Science & research, Hong Kong University of Science and Technology, Barnacles

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