合肥地区地表水锰污染来源及处理实践

Source and Treatment Practice of Manganese Pollution in Surface Water of Hefei

近年来,多地出现地表水锰超标现象。为了应对锰超标风险,文中对合肥地区地表水锰污染状况及来源进行研究,发现该地区锰污染主要是内源性污染,表现为6月—10月锰含量高,11月—次年5月锰含量低的特征。地表水锰污染处理方法根据水中锰的分布,采取优化取水条件,削减供水原水锰源和强氧化剂氧化处理工艺措施。生产试验表明,封闭取水底部,采取中上层水,生产工艺中因地制宜,采用高锰酸钾和氯气氧化法处理,是地表水应急除锰的最佳选择,能够达到工艺简单、效果明显的目的。

In recent years, excessive manganese in surface water has appeared in many places. In order to cope with the risk of manganese exceeding the standard, this paper studied the status and sources of manganese pollution of surface water in Hefei area,and found that manganese pollution in this area was mainly endogenous pollution, which was characterized by high manganese content from June to October and low manganese content from November to May of the next year. Surface water manganese pollution treatment method was based on the distribution of manganese in the water, adopting the measures of optimization of water intake conditions, reduce of manganese source in raw water and application of strong oxidant oxidation. Result of production test shows that sealing the bottom of water intake, adopting upper-middle layer water, adapting to local conditions and applying potassium permanganate and chlorine oxidation method is the best choice for emergency manganese removal from surface water. It can achieve the purpose of simplifying process and obtaining obvious effects.