Fe^(2+)对成熟滤柱除锰效果的影响

The Influence of Fe^(2+) on Manganese Removal of Mature Filter Column

以哈尔滨呼兰区某地含高浓度铁锰地下水为处理对象,模拟实际情况中突发性Fe^(2+)污染对成熟滤柱除锰效果的影响。分别进行了曝气失效,Fe^(2+)浓度增大,滤速增大实验。实验结果表明:曝气失效的滤柱受Fe^(2+)污染后,出水锰增加,恢复曝气,6d后滤柱恢复除锰能力,出水锰达标(锰含量小于0.1mg/L);Fe^(2+)浓度从0.58mg/L逐步增加至2.09mg/L时,滤柱出现出水锰不达标情况,恢复至上一浓度1.56mg/L时,经过4d,出水锰达标;滤速从1m/h逐渐增大到5m/h,出水锰不达标,恢复至上一速度4m/h,经过7d,出水锰达标。

The groundwater containing high concentrations of iron and manganese in somewhere of Harbin Hulan district was taken as a sample. The experiments were performed respectively on aeration failure, increasing the concentration of Fe^2＋ and increasing the filtration rate in order to simu- late the influence of Fe^2＋ on manganese removal of mature filter column in sudden situation. The results indicated that the filter column was polluted by Fe^2＋ in aeration failure and the concentration of Mn^2＋ in filtered water increased. The filter column restored the manganese removal capacity by aer- ation in the next 6 days and the manganese of filtrated water was qualified （the concentration of Mn2. less than 0.1mg/L）. The manganese of filtrated water was not qualified when the concentration Fe^2＋ increased from 0.58mg/L to 2.09mg/L; The manganese of filtrated water was qualified after 4 days while the concentration of Fe^2＋ reduced to 1.56mg/L. Increasing the filtration rate from lm/h to 5m/h, the manganese of filtrated water was not quali- fied; when the filtration rate reached 4m/h, the manganese of filtrated water was qualified after 7 days.