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作者单位:Lei Wang (1) Panliang Liu (1) (2) Tianxiang Chen (1)
1. College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen, 361024, People’s Republic of China 2. College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, People’s Republic of China
刊物类别:Physics and Astronomy
刊物主题:Physics Mechanics Characterization and Evaluation Materials Mechanical Engineering Inorganic Chemistry Nuclear Physics, Heavy Ions and Hadrons
出版者:Springer Netherlands
ISSN:1572-8986
文摘
In the present study, efficient dechlorination and decomposition of dichloromethane (DCM) induced by glow discharge plasma (GDP) in contact with an aqueous solution was investigated. Experimental results showed that DCM underwent effective dechlorination and decomposition under the action of GDP. Both the removal and the dechlorination of DCM increased with increasing pH and with the presence of hydroxyl radical scavengers and decreased with quenchers of hydrated electrons. Formic acid and formaldehyde were the major intermediate byproducts. Final products were carbon dioxide and chloride ion. Hydrated electrons were the most important active species responsible for initiation of the reaction. Hydrolysis of the resulting chloromethyl radicals played an important role in mineralization of chlorine atoms of the molecule. Hydroxyl radicals were mainly involved in the oxidation of the intermediate byproducts. Reaction mechanism was proposed based on the dechlorination kinetics and the distribution of intermediate byproducts. Keywords Glow discharge Dechlorination Reaction mechanism Aqueous