赤泥亚铁混合材料强化混凝除铬研究  

REMOVAL OF CHROMIUM BY ENHANCED COAGULATION PROCESS USING RED MUD COMBINED WITH FERROUS SULFATE

作　　者：陈浩[1,2] 李亦然[1] 王军[1] 王红宇[2] 栾兆坤[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]浙江工业大学,浙江杭州310014

出　　处：《水处理技术》2011年第12期15-19,共5页Technology of Water Treatment

基　　金：863应急项目(2008AA06A409-3);国家科技部"科研院所技术开发研究专项资金"(2010EG111022)

摘　　要：研究了赤泥亚铁混合材料在化学混凝工艺中的除铬效果及强化作用机理。结果表明,适宜处理条件为:Fe(II)与Cr(VI)的摩尔比为3:1,赤泥和硫酸亚铁的质量比为13:12,赤泥过筛筛孔为96μm,pH为6.7。在此条件下,对质量浓度为30 mg.L-1的含铬废水的去除率可达98.5%;Cd2+和Ni2+对赤泥亚铁混合材料除铬有一定的促进作用。与传统化学混凝工艺比较,以赤泥亚铁混合材料作为混凝剂的铬去除率和絮体沉降性均得到了提高。The effect and mechanism of chemical coagulation process using red mud combined with ferrous sulfate on the removal of chromium were studied. The results showed that the optimal conditions were as follows： the molar ratio of Fe（Ⅱ） and Cr（Ⅵ） was 3：1, the mass ratio of red mud and ferrous sulfate was 13：12, the sieve pore size for red mud was 96μm, the pH value of solution was adjusted to 6.7. The removal percentage of 98.5% was attained under the optimal conditions to remove the chromium of 30 mg· L-1 wastewater. Compared with the traditional chemical coagulation process, ratio of chromium elimination and settleability of flocs were improved using red mud combined with ferrous materials as coagulant. The effect of Cd2＋ and Ni2＋ on the removal of chromium was also studied in the experiment.

关 键 词：赤泥 硫酸亚铁 强化混凝 除铬 

分 类 号：X703.1[环境科学与工程—环境工程]