聚合氯化铝对消毒副产物前体物的混凝去除效能  

Removal Efficiency of Disinfection By-product Precursors by PACl Coagulation

作　　者：胡晓勇[1] 王盼盼[2] 

机构地区：[1]黑龙江省城市规划勘测设计研究院市政二所,黑龙江哈尔滨150040 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《中国给水排水》2016年第17期61-64,69,共5页China Water & Wastewater

摘　　要：通过对东北某江水进行强化混凝试验,研究聚合氯化铝对不同分子质量组分、不同pH值条件下的消毒副产物三卤甲烷生成势(THMFP)、卤乙酸生成势(HAAFP)的影响。结果表明,当聚合氯化铝投加量为2.0 mg/L时,三卤甲烷生成势、卤乙酸生成势均呈现下降的趋势。当pH值为5.0时,水解产物以Keggin-Al_(13)形态为主,对THMFP的去除效果最好,混凝机理以电中和为主。当pH值为8.0时,水解产物以Al(OH)_3、Al(OH)_4^-形态为主,对HAAFP的去除效果最好,混凝机理以吸附架桥、网捕卷扫为主。Coagulation experiments of a northeast river water were conducted to investigate the re- moval performance of trihalomethane formation potential （THMFP） and haloaeetic acid formation poten- tial （HAAFP）, two major disinfection by-products （DBPs）, by polyaluminium chloride （PACl） coagu- lation under different components and pH values. The results showed that THMFP and HAAFP were both reduced by the addition of PACl of 2.0 mg/L. When the pH value was 5.0, hydrolysis product of PAC1 was mainly composed of Keggin-Al13, and the best removal efficiency of THMFP was obtained, due to the charge neutralization mechanism. When the pH was 8.0, hydrolysis product of PAC1 was mainly com- posed of Al （OH） 3 or Al（OH） 4 , and the best removal efficiency of HAAFP was obtained, due to the ad- sorption-bridging and sweep flocculation mechanism.

关 键 词：混凝 聚合氯化铝 三卤甲烷生成势 卤乙酸生成势 水解产物 

分 类 号：TU991.2[建筑科学—市政工程]