生物滤池地下水除铁除锰过程中漏锰现象研究

Manganese leakage of the process of iron and manganese removal from groundwater in bio-filter

针对生物滤池地下水同步除铁除锰过程中的"漏锰"现象进行研究。结果表明,"漏锰"现象是由亚铁离子与锰氧化物的反应引起的;砂样生物活性、溶解氧及浸泡时间等对亚铁离子与锰氧化物的反应影响不大;增加浸泡次数可使"漏锰"现象得到缓解;出水锰浓度与砂样质量和亚铁离子含量均呈二次抛物线关系,底物浓度越大,出水锰含量增大越快;酸性条件可以促进亚铁离子和锰氧化物的反应,碱性条件下"漏锰"现象不易发生。

The manganese leakage phenomenon of the process of iron and manganese removal simultaneously from groundwater in bio-filter was studied. The results showed that manganese leakage phenomenon was risen by the reaction between ferrous ions and manganese oxides. The bioactivity of sand specimen, dissolved oxygen and soaking time had less influence on the reaction between ferrous ions and manganese oxides. The manganese leakage could be released through the increase of soaking times. The effluent manganese concentration presented the quadratic parabola with sand specimen quality, concentration of ferrous ions. The increase of effluent manganese content was faster with the increace of substrate concentration. The acidic condition could promote the reaction between ferrous ions and manganese oxides, and the manganese leakage was difficult to happen in the alkalic condition.