零价铁去除三氯乙烯研究  

Study on the Removal of Trichloroethylene by Fe^0

作　　者：蔡静[1,2] 单爱琴[1,2] 李海花[1,2] 李玲[1,2] 黄媛媛[1,2] 

机构地区：[1]中国矿业大学江苏省资源环境信息工程重点实验室,江苏徐州221116 [2]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《安徽农业科学》2010年第19期10209-10211,共3页Journal of Anhui Agricultural Sciences

基　　金：江苏省自然科学基金项目(BK2008134);中国矿业大学科技基金项目(2006B021)

摘　　要：[目的]研究零价铁(Fe0)对三氯乙烯(TCE)的去除作用。[方法]通过分批试验,利用廉价铁粉对水中TCE进行还原脱氯,研究了Fe0的纯度、粒径、投加量、酸洗预处理及不同的pH值条件对TCE去除的影响。[结果]Fe0的纯度越高,粒径越小,TCE的去除效果越好;在试验范围内,Fe0的投加量越大,TCE的去除效率越高;酸洗预处理可以明显提高Fe0对TCE的去除率;在试验范围内,不同pH值下Fe0去除TCE的效率为:pH值6>pH值7>pH值8,说明偏酸性的条件有利于Fe0对TCE的去除。[结论]研究的结果将为地下水TCE污染的场地修复技术提供理论基础。[Objective] The aim was to research the removal of trichloroethylene（TCE）by Fe0.[Method] Influences of Fe0 purity,particle size,amount,acid-washing pretreatment and the different pH values on reductive dechlorination of TCE in water solution by cheap iron powers were studied with the method of batch experiment.[Result] The results indicated that better removal efficiency of TCE was obtained with higher Fe0 purity and smaller Fe0 size.With more Fe0 amount was added,higher removal efficiency of TCE was got.Removal efficiency of TCE was improved obviously by acid-washing pretreatment.Under the test conditions,removal efficiency of TCE at different pH values were：pH=6pH=7pH=8.That is to say the acid condition is better for the removal of TCE by Fe0.[Conclusion]The result of the research can provide theoretical basis for site remediation technologies of TCE pollution in groundwater.

关 键 词：零价铁 三氯乙烯 还原脱氯 

分 类 号：X52[环境科学与工程—环境工程]