改性滤料除锰效能及影响因素研究

Study on Manganese Removal Efficiency by Modified Filtering Medium and Influencing Factors

通过静态和动态试验,对改性滤料的除锰效能及其影响因素进行了考察。结果表明,改性滤料的除锰效能显著优于石英砂和天然锰砂的,其对水中锰离子的吸附属于典型的Freun-dlich吸附类型;在150 h的动态试验期间,改性滤料对锰的去除率>90%,出水锰浓度<0.1 mg/L;中性或弱酸性条件及高溶解氧浓度有利于改性滤料持续高效除锰。

The manganese removal efficiency by modified filtering medium and the influencing factors were investigated by static and dynamic tests. The results show that the manganese removal efficiency by modified filtering medium is obviously better than that by quartz sand and natural manganese sand, and the adsorption process by modified filtering medium follows Freundlich adsorption model. In the dynamic test period of 150 h, the manganese removal efficiency by the modified filtering medium is above 90% with the effluent concentration of manganese of less than 0.1 mg/L. It is favorable for the continuous and effective manganese removal by the modified filtering medium under the weak acid, neutral pH and high DO concentration condition.