Fe0去除地下水中六价铬的研究.pdfVIP

2011, 16( 2) : 160- 164 Journal of China Agricultural University 0 Fe * 李雅 张增强 唐次来 易磊 ( , 12100) 为了研究零价铁去除水中Cr( Ö) 的效果及影响因素在实验室条件下, 通过批试验, 考 了铁粉预处理 铁粉用量初始pH 及阳离子对六价铬去除的影响结果表明: 零价铁能够有效快速的去除污染水体中的六价 铬, 机理为氧化还原和共沉淀; 其去除率受铁粉预处理铁粉投加量初始 pH 及阳离子的影响; 在酸性条件下, Fe2+ 浓度可以作为六价铬是否完全去除的指示剂 零价铁; 六价铬; 地下水; 氧化还原; 共沉淀 X 523 100 -4333( 2011) 02-0160-05 A Simulationon reduction of hexavalent chromium from groundwater using zero valent iron * LI Ya, ZHANGZeng- iang , TANGC-i lai, YI Lei ( College of Resource and Environmen, Northwest Agriculture Forestry University, Yangling 12100, China) Abstract In order to provide guidance for practical application in the remediation of groundwater pollution, the influencing factors of reduction of hexavalent chromium from solution w ere studied by batch experiment at laboratory scale, such as pretreated, amount of iron, initial pH and cation. The results show ed that hexavalent chromium was removed quickly and effectively by zero valent iron, removal mechanism was redox and coprecipitation; the removal ratio was effected by the pretreatment with acid and nickelaqe, the amount of iron, initial pH and cation; Fe2+ could be used as an indicator for complete reduction of hexavalent chromium in the acidic condition. Key words zero valent iron; hexavalent chromium; groundw ater; redox; coprecipitation [ 4-6] ( Cr) , Cr( Ö) , , , , [ ] , [ 1] , , Cr( Ó) Cr ( Ö) , Cr( Ö) , ,