不同锰砂滤料对地下水除锰的去除能力分析

The Removal Ability Analysis of Different Manganese Sand Filter Materials in Groundwater

目的掌握不同锰砂滤料对地下水中锰离子的去除速率和去除机理,为选择理想的锰砂滤料提供科学依据.方法选择水厂滤池成熟滤料和4种不同品质的锰砂分别装在5组滤柱中对同一原水进行处理,测定滤柱出水锰离子质量浓度,分析其成熟期、并与反应速率方程进行拟合,综合分析锰砂的去除能力.结果 B柱马山高品质天然锰砂成熟期为28 d、C柱马山低品质天然锰砂和E柱葫芦岛杨家杖天然锰砂滤料成熟期为66 d、D柱河南巩义天然锰砂成熟期为86 d.在锰砂滤料形成活性滤膜后,不同锰砂都表现出了一级反应速率方程的特征,B柱马山高品质锰砂的成熟期最短,去除速率高,是除锰理想的锰砂滤料.结论锰砂品质对生成活性滤膜和成熟期影响很大,锰砂生成活性滤膜后的质量浓度随时间变化曲线符合一级反应速率方程.

The paper is to present removal rate and removal mechanism of different manganese sand filter to the manganese ions in groundwater in order to provide a scientific basis for choosing the ideal manganese sand filter material. Mature water filter, filter material and four different manganese sand respectively in five groups in the filter column to deal with the same raw water were prepared. Measuring filter column effluent concentration of manganese in different time and analyzing its mature period, the reaction rate equation fitting was attained, and could comprehensively analyze the manganese sand removal ability. The results show that B column, Mashan natural manganese sand （ MnO2 content 32.76% ） mature period is 28 days; C column,Mashan natural manganese sand（ MnO2 content is 26. 4% ）and the E column, Huludao Yangjiazhang natural manganese sand filter material mature period is 66 days;D column, Henan Gongyi natural manganese sand mature period is 86 days. In the formation of manganese sand filter, active filter membrane, different manganese sand showed the characteristics of the first order reaction rate equation;B column the maturity of the high quality of Mashan manganese sand is the shortest, high removal rate, and is one of the ideal of manganese sand filter materials. The conclusions show that manganese sand quality has a great influence on generate active filter membrane and maturity;manganese sand generates pseudo-first-order reaction rate equation of active after the membrane filter.