强化混凝去除微污染水源水中镉(Ⅱ)的研究  

Removal of cadmium (Ⅱ) from micro-polluted raw water by enhanced coagulation process

作　　者：陈伟玲[1] 李明玉[1] 任刚[1] 林达红[1] 袁永钦 申石泉 

机构地区：[1]暨南大学环境工程系,广州510630 [2]广州市自来水公司,广州510160

出　　处：《给水排水》2008年第11期129-132,共4页Water & Wastewater Engineering

基　　金：广东省科技计划重大专项(2006A36802001);广东省“十一五”重大科技专项(2007A032400001)

摘　　要：针对微污染水源水中的Cd(Ⅱ)污染去除,以聚硫酸铁(PFS)为混凝剂,采用强化混凝对水中微量Cd(Ⅱ)的去除进行了研究。考察了pH、PFS投加量、Cd(Ⅱ)初始浓度和原水浊度等因素对Cd(Ⅱ)去除的影响。结果表明,在pH≥9的条件下,当原水中Cd(Ⅱ)为0.1mg/L时,投加3.75mg/L的PFS(以Fe计),可使滤后水Cd(Ⅱ)剩余浓度降至0.005mg/L以下,满足《生活饮用水卫生标准》(GB5749—2006)要求;当水中Cd(Ⅱ)初始浓度较高时,适当增加PFS投加量即可使镉得到有效去除。强化混凝是去除微污染水源水中Cd(Ⅱ)污染的经济、有效方法之一。The removal of cadmium （Ⅱ） from micro polluted raw water by enhanced coagula tion was studied using polyferric sulfate（PFS） as the coagulant. The effects of the pH, the dosage of PFS, the concentration of cadmium （Ⅱ） ion and the turbidity of raw water on the cadmium （Ⅱ） removal were investigated. The experimental results showed that, under the condition of the pH19, the residual concentration of cadmium （Ⅱ） was lower than 0. 005 mg/L; when the dosage of PFS was 3.75 mg/L and the cadmium （Ⅱ） concentration 0. 1 mg/L in water; when the concentration of cadmium （Ⅱ） is higher than 0.1 mg/L in water, cadmium （Ⅱ） could also be removed under the condition of increasing the dosage of PFS. In conclusion, the enhanced coagulation is one of the effective and economic methods to remove cadmium （Ⅱ） from micro-polluted raw water.

关 键 词：微污染水源水 镉(Ⅱ) 强化混凝 聚硫酸铁 

分 类 号：TU991.2[建筑科学—市政工程] TU991.22