新生态二氧化锰混凝特性及机制研究

Coagulative Characteristics and Mechanism of Fresh Manganese Dioxide

采用高锰酸钾与亚硫酸钠复合还原剂制备新生态二氧化锰并用其处理各种浊度原水,考察了该新生态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：所制备的新生态二氧化锰具有丰富的表面羟基,且比表面积较大,具有较高的化学吸附活性,在较低的投量（2 mg/L）下即具有显著的混凝效能,混凝的最佳pH值范围为7;9;该新生态二氧化锰的混凝除浊机制主要是吸附架桥作用.

This paper uses the potassium permanganate and the sodium sulfite compound reducing agent to make fresh manganese dioxide and processes each kind of turbidity raw water with it, inspects this fresh manganese dioxide＇s coagulate efficiency, the influencing factor and possible mechanism to reduce turbidity. The result indicates that this preparation has rich superficial hydroxyl, bigger specific surface and higher chemical adsorption activeness. In addition, under lower throws （2 mg/L）, it has the remarkable coagulation potency and the best coagulation pH value scopes vary from 7 to 9. This mechanism of fresh manganese dioxide which coagulates and eliminates the muddy mainly adsorbs the bridging function.