二元金属体系对水中多氯有机物的催化还原脱氯特性

Dechlorination of three polychlorinated hydrocarbons in water using bimetallic systems.

采用二元金属作为还原和催化剂，对水中三氯甲烷、四氯化碳和三氯乙烯的还原特性进行了实验研究。结果表明，Ｆｅ／Ｐｄ和Ｆｅ／Ｎｉ体系对所有３种有机物具有良好的催化脱氯特性，３０ｍｉｎ内脱氯率大于８５％。对三氯甲烷，仅用零价铁即可达到近８０％的脱氯效率。水中的铁浓度和ｐＨ值在反应初期随反应时间而增高，反应后期却降低，文中对此原因作了理论分析。

Dechlorination of trichloromethane, phenixin, and trichloroethethylene in water was studied by using bimetallic catalytic reduction. Fe/Pd and Fe/Ni systems prove to be very effective for dechlorination of these three polycholrinated hydrocarbons with the dechlorination efficiencies above 85%. In the case of trichloromethane, zerovalent iron alone had efficient dechlorination capability. Fe2+ concentration and pH value of the solution increased with reaction time in the first stage, and then reduced. The dechlorination mechanism is also discussed in the paper.