Treatment of coal mine drainage with high concentrated iron and manganese by modified manganese sand filter
改性锰砂滤料处理高铁锰煤矿矿井水

Modified manganese sand filers material was successfully prepared by impregnation with KMnO4 solution. It was studied at the surface characteristics and filtration performances by the treatment of coal mine drainage with high concentrated iron and manganese. The results showed that: refer to the performance of iron and manganese, manganese sand filter was superior to quartz sand, haydite, and porcelain sand. KMnO4 solution impregnation improved the filter performance of manganese sand filter and its optimal concentration was 5%. For the treatment of coal mine drainage with high concentrated iron and manganese by filtration process with 5% KMnO4 solution, the optimal parameters were filtration cycle of 24 h, backwashing strength of 3.2 L/(s·m2), and backwash time of 5 min. Through surface area test and SEM analysis, it was found that the surface area of manganese sand filter increased and oxide film on the surface was formed after impregnated by KMnO4 solution. This enhanced the performance of the manganese sand filter, the higher concentration of KMnO4 solution, the better performance of manganese sand filter.