零价铁去除三氯乙烯及四氯乙烯对比实验研究

文章以三氯乙烯(TCE)和四氯乙烯(PCE)为目标污染物,采用批实验方法,研究零价铁的纯度、粒径、投加量对零价铁去除氯代烃的影响,同时分析TCE、PCE两种污染物共存对零价铁去除TCE和PCE的影响。实验结果表明:(1)在实验范围内,零价铁的纯度越高,粒径越小,投加量越大,零价铁对TCE和PCE的去除效果越好;(2)零价铁对四氯乙烯的去除效果比对三氯乙烯的去除效果好;(3)三氯乙烯、四氯乙烯共存时会相互竞争与零价铁的反应位点,从而降低各组分的去除效率。

Removal of TCE and PCE by Zero-valent Iron

A bench-scale experiment was conducted to examine removal of chlorinated hydrocarbons, e.g, trichloroethylene ( TCE) and tetrachloroethylene ( PCE) from water by zero-valent iron. The result indicates that zero-valent iron with purer quality and smaller particle size brings about better removals of TCE and PCE and dosage of zero -valent iron is also proportional to the removals. Zero-valent iron’s removal of TCE is better than that of PCE. When both TCE and PCE co-exist in the solution the removals decline due to the competitiveness with each other as to the reaction sites of the iron particles surface.