水合MnO_2强化FeCl_3共沉降去除水中微量Cd(Ⅱ)  

Hydrous Manganese Dioxide Enhanced Ferric Chloride Co-precipitation for Removing Traces of Cadmium in Water

作　　者：杨威[1,2] 任南琪[3] 李圭白[3] 

机构地区：[1]哈尔滨工业大学环境科学与工程博士后流动站,黑龙江哈尔滨150090 [2]哈尔滨商业大学环境工程系,黑龙江哈尔滨150076 [3]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《化学与粘合》2014年第5期342-345,共4页Chemistry and Adhesion

基　　金：黑龙江省自然科学基金项目(编号:E200818);黑龙江省博士后基金项目

摘　　要：采用烧杯混凝实验,分别以实验室配水和松花江水为本底,研究了水合二氧化锰强化三氯化铁共沉降去除水中微量镉的效能。详细探讨了影响水合二氧化锰强化三氯化铁共沉降去除水中微量镉的主要因素。结果表明:两种水质条件下,水合二氧化锰均可强化FeCl3混凝去除水中的微量镉,镉的去除率明显高于单纯FeCl3混凝。水体pH值、浊度、腐殖酸等水质参数对于水合二氧化锰强化三氯化铁共沉降去除水中微量镉的效能有不同程度的影响。其中水体pH值对水合二氧化锰强化三氯化铁共沉降去除水中微量镉的影响十分显著,Cd(Ⅱ)的去除效果随着水体pH增加显著升高。The efficiency of hydrous manganese dioxide enhanced ferric chloride co-precipitation for removing traces of cadmium in water was stud- ied in jar tests with the water mixed in lab and the water from Songhua River as substrates. And the main factors which would influence the removal of Cd（ II ） was investigated in detail. The results indicated that the hydrous manganese dioxide had significantly enhanced the ferric chloride co-precipita- tion process for removing Cd（ II ） in different kinds of raw water. A higher removal rate of cadmium could be achieved with the aid of hydrous manganese dioxide in ferric chloride coagulation process which was much better than that of pure FeC13 coagulation. Some parameters of water, such as pH value, turbidity of raw water and humic acid had different effects on the removal of Cd（ II ）. The pH value was the key factor for hydrous manganese dioxide en- hanced ferric chloride co-precipitation for removing traces of Cd（ II ）. The removal rate would be much higher with the increase of pH value.

关 键 词：水合MnO2 FECL3 强化混凝 Cd(Ⅱ) 

分 类 号：TQ314.253[化学工程—高聚物工业]