Fe^(2+)对单级除铁除锰滤池除锰成熟期的影响  

Impact of Fe^(2+) on Manganese-removing Mature Period of Single-stage Iron and Manganese Removal Filter

作　　者：杨威[1,2] 倪小溪 余华荣[3] 杜星[3] 陈志和 刘伟[2] 李虹[3] 李圭白[3] 

机构地区：[1]哈尔滨商业大学环境工程系,黑龙江哈尔滨150076 [2]哈尔滨商业大学生命科学与环境科学研究中心,黑龙江哈尔滨150076 [3]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [4]哈尔滨利民经济技术开发区自来水公司,黑龙江哈尔滨150025

出　　处：《中国给水排水》2017年第7期6-10,共5页China Water & Wastewater

基　　金：黑龙江省自然科学基金资助项目(E200818)

摘　　要：以哈尔滨某地含高浓度铁锰地下水为处理对象,研究了进水Fe^(2+)浓度对单级非均匀级配石英砂滤料除铁除锰滤柱启动期间成熟期的影响。试验中,Fe^(2+)和Mn^(2+)可被单级滤柱相继去除,滤柱上层是棕褐色的除铁层,滤柱下层为黑褐色的除锰层,进水中的Fe^(2+)易于被去除,而Mn^(2+)的去除则受进水中Fe^(2+)浓度的影响。试验表明,锰质滤膜受Fe^(2+)污染可致滤膜中的锰被还原溶出,控制因素是锰膜对Fe^(2+)的单位吸附量,而非水中Fe^(2+)浓度。进水中Fe^(2+)浓度很低时,除锰成熟期较短(45 d),随着进水中Fe^(2+)浓度的增加,滤池中除铁层增厚,导致除锰层被压缩,除锰层中锰质活性滤膜受到Fe^(2+)污染的程度不断加重,滤池除锰成熟期显著延长。Groundwater containing high concentrations of iron and manganese in somewhere of Harbin was used to investigate the effect of iron and manganese removal by contact oxidation in the singlestage heterogeneous graded quartz sand filter. Fe2＋ and Mn2＋ could be removed consecutively in the filter. The filter comprised two layers, i.e. the upper was brown iron-removing layer and the lower was dark brown manganese-removing layer. The experiment results proved that the removal of Fe2＋ was very easy, while Mn2 ＋ removal was influenced by the concentration of Fe2 ＋ in the feed. It was showed that the manganese film could be reduced by Fe2＋ and Mn2＋ was generated in the reaction. The Mn2. dissolution was controlled by the Fe2＋, adsorption amount by unit manganese film, but not the Fe2＋ concentration in the feed. When the concentration of Fe2＋ of the groundwater was low, the manganese-removing mature period was short （45 days）. The higher concentration of Fe2＋ was, the lower position of the manganeseremoving filter layer was, the more damage to manganese film was, and manganese-removing mature period was increased significantly.

关 键 词：地下水 除铁除锰 Fe^2+浓度 非均匀级配滤料 除锰成熟期 

分 类 号：TU991.2[建筑科学—市政工程]