水合二氧化锰的制备及其混凝特性  

Preparation and Coagulation Characteristic of Hydrated Manganese Dioxide

作　　者：杨威[1] 李星[2] 杨艳玲[2] 李圭白[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院 [2]北京工业大学建筑工程学院,北京100022

出　　处：《中国给水排水》2006年第15期37-39,43,共4页China Water & Wastewater

基　　金：黑龙江省自然科学基金资助项目(E200510);北京市教委科技发展计划项目(KM200610005020)

摘　　要：采用高锰酸钾与亚硫酸钠复合还原剂制备水合二氧化锰并用其处理人工配水，考察了该水合二氧化锰的混凝效能、影响因素及可能的除浊机制。结果表明：所制备的水合二氧化锰具有丰富的表面羟基，其比表面积约为181．595m^2／g，在较低的投量（3mg／L）下即具有显著的混凝效能，混凝的最佳pH值范围为7～9；该水合二氧化锰的混凝除浊机制主要是吸附架桥作用。Lab-scale coagulation experiments on the treatment of simulated raw water were carried out using hydrated manganese dioxide produced by potassium permanganate and sodium sulfite composite. The effects of the coagulation and the possible mechanisms were studied. The results indicate that hydrated manganese dioxide has abundant surface hydroxyl radical, its specific surface area is 181. 595 m^2/g. There are obvious effects of coagulation in raw water when the dosage is 3 mg/L and pH ranges 7 - 9. It infers that the mechanism of turbidity removal is interface adsorption and bridging action.

关 键 词：水合二氧化锰 混凝效能 剩余浊度 亚硫酸钠复合还原剂 

分 类 号：TU991.2[建筑科学—市政工程]