Abstract:

The dechlorination of chloroalkane in aqueous solution by catalytic reduction for the typical chlorinated organic matter tetrachloromethane and tetrachloroethane by using waste iron paring as reducing agent and adding catalyst and polarizing materials has been studied. Results show that chlorinated organic matter can be reductive dechlorination with zero-valent iron, so the toxicity of chlorinated organic matter is reduced quickly. The effect of the concentration of organic matter on the reaction speed is studied. The intermediate products in the course of reaction are analyzed. The results show that the intermediate product of tetrachloromethane is dichloromethane while the intermediate product of tetrachloroethane is dichloroethylene. The main reaction mechanism is that the chlorinated organic matter gain electrons directly, and let reductive dechlorination take place.

Key words: chlorine-containing organic matter, reductive dechlorination, catalytic reduction, zero-valent iron

摘要：

以四氯化碳和四氯乙烷为代表物，研究了水溶液中氯代烷烃的催化还原脱氯技术，使用的还原剂为废铁刨花并添加催化剂和极化材料，结果表明该方法能使氯代有机物在零价铁体系中有效地发生还原反应，能迅速脱氯为氯离子，降低氯代有机物的毒性。探讨了有机物浓度对反应速率的影响，并分析了还原脱氯速率和反应中间产物，四氯化碳的反应产物主要是二氯甲烷，而1，1，2，2-四氯乙烷的主要反应产物是二氯乙烯。氯代有机物直接得到电子而发生还原脱氯是其主要反应机理。

关键词: 含氯有机物, 还原脱氯, 催化还原, 零价铁

CLC Number: 

• TU991.2