二氧化氯对水中锰离子去除的试验研究

Removal of Manganese From Portable Water With Chlorine Dioxide

通过氧化／混凝工艺静态模拟试验，考察了二氧化氯对水中锰离子去除的情况及其影响因素。试验表明，二氧化氯投加量、原水pH值、水中锰离子的初始浓度、预氧化时间和混凝剂投加量对除锰都有很大的影响。当原水锰离子质量浓度为5mg／L时，氧化剂预氧最佳pH值为7～9，二氧化氯最佳投加量分别为10mg／L，二氧化氯最佳预氧化时问分别为40min，最佳混凝剂的投加量分别为2mg／L。二氧化氯对锰离子的去除率分别为90．8％

Through static simulating experiment of oxidation - floeeulation process, removal effect of manganese with chlorine dioxide and influence factors were investigated. The experiment shows that dosage of oxidant, time of pre - oxidation, dosage of coagulant, pH value and initial concentration of manganese in the water have great influence on removal of manganese. The conclusion is as follows： the optimum pH values is 7 -9 ,the optimum dosage of oxidant is 10 mg/L, the optimum time of pre -oxidation is 40 rain,the optimum dosage of coagulant is 2 mg/L, when the initial concentration of manganese in the water is 5 mg/L,the removal efficiency is 90.8%.