金属铁去除水中Cr^(6+)的影响因素研究  

Study on influencing factors of Cr^(6+) removal in water by metal iron

作　　者：李红江[1,2] 姜永海[2] 席北斗[2] 董东林[1] 惠媛[2] 韩亮[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]中国环境科学研究院,北京100012

出　　处：《环境工程学报》2011年第3期503-506,共4页Chinese Journal of Environmental Engineering

基　　金：国家公益性行业科研项目(200909079);国家"973"重点基础研究发展规划项目(2005CB724203)

摘　　要：研究Fe/Cr6+比值和不同浓度的NO3-、Cl-和SO42-对金属铁去除Cr6+效果的影响。结果表明,金属铁对水中Cr6+有很好的还原去除效果;当金属铁的使用量为Cr6+量的1/2 000时,铁对Cr6+的去除效果较差且易失去活性,而当金属铁的使用量为Cr6+量的8 000倍时,铁对Cr6+的去除效果较好且其活性的持续性较强;3种阴离子(NO3-、Cl-和SO42-)均能提高金属铁对重金属Cr6+去除率,但在反应初期,3种阴离子对金属铁去除水中Cr6+影响的差异性不显著,随着反应时间的增加,SO24-对金属铁去除水中Cr6+的促进作用逐渐强于Cl-和NO3-,3种阴离子对金属铁去除Cr6+效率促进作用的大小顺序为SO24->Cl->NO3-。The influence of Fe/Cr6＋ ratio and the effect of NO-3,Cl-,SO2-4 concentrations on Cr6＋ removal are studied in this research.The results show that Cr6＋ in the contaminated water can be removed by metal iron.The removal efficiency decreases and the metal iron activity subjects to devitalize under Fe/Cr6＋ ratio lower than 2 000,while the removal efficiecncy and metal iron activity can be improved when Fe/Cr6＋ ratio is higher than 8 000.Three kinds of anions（NO-3,Cl-,SO2-4） can accelerate the removal process of Cr6＋.However,there is no evident discrepancy for the influence of three kinds anions on Cr6＋ removal at initial reaction,while the promotion function of SO2-4 for Cr6＋ removal is more effective than Cl-and NO-3 afterward.The sequence of promotion ability of metal iron to Cr6＋ removal is： SO2-4 Cl- NO-3.

关 键 词：金属铁 Cr6+ 去除率 无机阴离子 

分 类 号：X523[环境科学与工程—环境工程]