零价纳米铁批处理水中Cr(Ⅵ)的研究  

Cr(Ⅵ)Batch Removal from Aqueous Solution with Nanoscale Zero-Valent Iron

作　　者：冯婧微[1,2] 梁成华[1] 王黎[2] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110161 [2]沈阳化工大学环境与生物工程学院,辽宁沈阳110142

出　　处：《安徽农业科学》2011年第15期9191-9193,共3页Journal of Anhui Agricultural Sciences

基　　金：国家科技重大项目(2008ZX07528-006-2)

摘　　要：[目的]研究纳米零价铁(NZVI)对水中Cr(Ⅵ)的脱除效果及影响Cr(Ⅵ)脱除的主要因素。[方法]以Cr(Ⅵ)为研究对象,采用NaBH4液相还原Fe3+制备纳米级零价铁(NZVI),分析了0.01、0.03、0.04、0.05、0.07 g的NZVI对初始浓度为10.0、20.0、30.0、50.0、70.0 mg/L,温度分别为15、20、25、30、40℃,pH分别为3、5、7、8、9条件下的Cr(Ⅵ)去除率的影响。[结果]纳米零价铁可在极低投加量下有效去除溶液中Cr(Ⅵ),在25℃、pH为5、常压、恒温振荡器转速200 r/min、NZVI加入量0.05 g/100 ml的条件下,水体中20 mg/LCr(Ⅵ)的去除率大于90%。[结论]纳米零价铁能快速去除水体中Cr(Ⅵ),溶液pH,Cr(Ⅵ)初始浓度,温度,投加量等是影响Cr(Ⅵ)脱除的主要因素。[Objective] The aim was to research the effects of Cr（Ⅵ） and the factors of removing dissolved Cr（Ⅵ） with nanoscale zero valent iron.[Method] With Cr（Ⅵ） as the material,nanoscale zero-valent iron was synthesized in aqueous solutions by reduction of Fe3＋ with NaBH4.The effects on removal ratio were analysed under the initial concentration of Cr（Ⅵ） were 10.0、20.0、30.0、50.0、70.0 mg/L,temperatures were 15、20、25、30、40 ℃,the pH were 3、5、7、8、9 for the NZVI dosage were 0.01、0.03、0.04、0.05、0.07 g.[Result] Cr（Ⅵ） could be removed effectively with NZVI and the removal ratio was more than 90% with an initial pH of 5 at 25 ℃,and 0.05g/100 ml NZVI when the Cr（Ⅵ） concentration was 20.0 mg/L.[Conclusion] Cr（Ⅵ） could be removed by NZVI,the pH,Cr（Ⅵ） initial concentration,temperature and the NZVI dosage were the main factors of effecting Cr（Ⅵ） removal.

关 键 词：NZVI 铬 影响因素 

分 类 号：X52[环境科学与工程—环境工程]