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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。
The reduction of trichloromethane, carbon tetrachloride and trichlorethylene in water was studied experimentally using binary metals as reductants and catalysts. The results show that Fe / Pd and Fe / Ni systems have good catalytic dechlorination characteristics for all three kinds of organic compounds, and the dechlorination rate is more than 85% within 30 min. For chloroform, nearly 80% dechlorination efficiency is achieved with zero-valent iron alone. The iron concentration and pH in water increased with the reaction time in the initial reaction period and decreased in the late reaction period. The theoretical analysis was made in this paper.