pH和腐殖酸对高铁酸盐去除水中铅_镉的影响.pdfVIP

第 35 卷 　第 5 期 哈 　尔 　滨 　工 　业 　大 　学 　学 　报 Vol 35 No 5 　 2 0 0 3 年 5 月 J OU RNAL OF HA RB IN IN ST I TU TE OF TECHN OL O GY 　 May , 2003 　　　　　　 p H 和腐殖酸对高铁酸盐去除水中铅 、镉的影响 梁咏梅 ,刘 　伟 ,马 　军 ( 哈尔滨工业大学 市政环境工程学院 ,黑龙江 哈尔滨 150090 , Email :Liang- hit @sohu . com) 摘 　要 : 利用静态试验研究了p H 和腐殖酸对高铁酸盐预处理去除铅 、镉的影响. 结果表明:高铁酸盐预处 理对水中微量铅 、镉有良好的去除效果 ,1 mg/ L 高铁酸盐可使铅 、镉的去除率比单纯硫酸铝混凝的铅 、镉去 除率提高 20 %左右. 中性和碱性条件下铅 、镉的去除率均高于酸性条件 ,铅的去除率高于镉. 水中腐殖酸浓 度升高使铅的去除率降低 ,对镉的去除率影响不大 ,高铁酸盐能够部分消除腐殖酸的影响 ,提高铅的去除率. 关键词 : 高铁酸盐 ;铅 ;镉 ;吸附;重金属 中图分类号 : TU99 1. 2 文献标识码 : A 文章编号 : 0367 - 6234 (2003) 05 - 0545 - 04 Eff ect of p H and humic acid on removal of lead and cadmium by combined f errate pretreatment and al um coagulation L IAN G Yongmei , L IU Wei ,MA J un ( School of Municip al Environmental Engineering , Harbin Institute of Technology , Harbin 150090 ,China , Email :Liang- hit @sohu . com) Abstract : A st atic test was conducted to evaluate t he effect of p H and humic acid on removal of t race lead and cadmium from t he water by ferrate p ret reat ment . It was found t hat t he removal efficiency of lead and cadmium was p romoted by 20 percent by ferrate p ret reat ment comp ared to coagulation t reated wit h alumini um sulfate only . A better removal was achieved in neut ral and basic condition t han in acid condition , t he re moval efficiency of lead is higher t han t hat of cadmium . The removal efficiency of lead decreased while t he humic acid concent ration increased , and t he negative effect of humic acid on lead removal could be reduced to some extent by ferrate p ret reat ment . Key words : ferrate ; lead ; cadmium ; adsorption ; heavy met al