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以高锰酸钾还原法制备的水合MnO2对模拟原水进行了混凝实验,探讨了水合MnO2作为新型净水剂在给水处理中应用的可行性;并对水合MnO2粒子的结构及界面性质进行了表征,探讨了其除污染的可能机制。结果表明:该水合二氧化锰具有丰富的表面羟基、晶型为δ-MnO2、比表面积为151.422m2/g。在较低投量时(2~3mg/L)即表现出对原水的优良的混凝效能,可使滤后水浊度降至1NTU以下。
The experiment of coagulation of simulated raw water with hydrated MnO2 prepared by potassium permanganate reduction method was carried out and the feasibility of applying hydrated MnO2 as a new type of water purification agent in water treatment was discussed. The structure and interfacial properties of hydrated MnO2 particles were also studied Characterization, discussed its possible mechanism of decontamination. The results show that the hydrated manganese dioxide has abundant surface hydroxyl groups, the δ-MnO2 crystal form and the specific surface area of 151.422m2 / g. In the lower dosage (2 ~ 3mg / L) that showed excellent coagulation efficiency of raw water, filtered water turbidity dropped to 1NTU or less.