双长链阳离子表面活性剂催化高锰酸钾氧化降解三氯乙烯反应研究

Study on oxidation degradation of trichloroethylene by potassium permanganate catalyzed by double long-chain cationic surfactants

通过目测溶液颜色和用离子色谱仪跟踪检测氯离子量的变化,考察了3种双长链阳离子表面活性剂对高锰酸钾氧化降解三氯乙烯(TCE)的催化加速作用.结果表明:在相同条件下,与十六烷基三甲基溴化铵(CTAB)相比,双长链阳离子表面活性剂催化加速TCE降解的效果更好,其加速倍数可达CTAB的5倍以上.在不搅拌的情况下,双长链阳离子表面活性剂的催化加速作用也获得了满意的结果.

By means of the observed color change of potassium permanganate （KMnO4） solution and the concentration change of chloride detected by ion chromatograph, the oxidation of trichloroethylene （TCE） by potassium permanganate with three kinds of double long-chain cationic surfactants as promoters was investigated. The results show that double long-chain cationic surfactants as promoters can significantly accelerate the rICE degradation, and the rate of TCE decomposition in the presence of double long-chain cationic surfactants is five times more than that in the presence of cetyltrimethylammonium bromide （CTAB）. Moreover, the degradation of TCE catalyzed by double long-chain cationic surfactants without stirring is satisfying.