赤泥复合颗粒对Fe^(2+)和Mn^(2+)的吸附-聚沉性能  

The Adsorption-precipitation Effect on the Treatment of Fe^(2+) and Mn^(2+) by Red Mud Composite Particles

作　　者：肖利萍[1] 李莹[1] 郭悦[1] 刘喆[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《非金属矿》2016年第3期23-25,共3页Non-Metallic Mines

基　　金：国家自然科学基金(51174267;51474122);辽宁省"百千万人才工程"项目(2009921106);辽宁省高校科研立项计划(2008300)

摘　　要：针对煤矿酸性废水中存在大量Fe^(2+)、Mn^(2+)和H+的污染问题,采用赤泥复合颗粒、脱碱复合颗粒及单独加碱对含Fe^(2+)和Mn^(2+)的煤矿酸性废水进行对比处理试验研究,并探讨了复合颗粒对Fe^(2+)和Mn^(2+)的去除机理。结果表明,赤泥复合颗粒释放总碱度为186.68 mg/g(以Ca CO3计),具有较强的p H值提升能力;复合颗粒通过吸附、沉淀、聚沉协同作用去除Fe^(2+)和Mn^(2+),且以沉淀作用为主,投加量为2 g/L时的去除率分别为83.26%和67.27%;复合颗粒对Fe^(2+)和Mn^(2+)的吸附均符合Freundlich吸附等温方程,倾向于多分子层吸附;赤泥复合颗粒既能降低酸度,又能吸附重金属离子,可作为处理含Fe^(2+)、Mn^(2+)煤矿酸性废水的优良吸附材料。In order to solve the problem of large amount of Fe^2＋, Mn^2＋ and H^＋ in acid mine drainage, the comparative study on Fe^2＋ and Mn^2＋removal efficiency of red mud composite particles, alkali-remove particles and alone with alkali was conducted and the remove mechanism of acid mine drainage containing Fe^2＋ and Mn^2＋ by composite particles was revealed. The results showed that the release of total alkalinity of red mud composite granule is 186.68 mg/g, which have a better ability of p H value improving. The composite particles adsorb, precipitate and coagulate Fe^2＋and Mn^2＋mainly depending on precipitate. The removal rate were 83.26% and 67.27% respectively when adsorbent dosage was 2 g/L. The adsorption for Fe^2＋and Mn^2＋ conform to Freundlich adsorption isotherm equation. They tend to be multimolecular layer adsorption. It was revealed that red mud composite particles could reduce acidity, adsorb heavy metal and treated acid mine drainage containing Fe^2＋, Mn^2＋.

关 键 词：赤泥复合颗粒 煤矿酸性废水 除Fe^2+、Mn^2+ 吸附 聚沉 协同作用 

分 类 号：X703[环境科学与工程—环境工程] X752