膨润土复合吸附剂中碱性材料筛选及对酸性矿山废水处理  

Selection of the Basic Refractories in Bentonite Composite Granule Adsorbent for Treating Acid Mine Drainage

作　　者：肖利萍[1] 高小雨[1] 丁蕊[1] 裴格[1] 魏芳[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》2013年第5期60-63,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51174267);辽宁省"百千万人才工程"(2009921106);辽宁省高校科研立项计划(2008300);格平绿色助学行动辽宁环境科研"123工程"

摘　　要：针对矿山废水呈酸性、含大量重金属离子问题,以膨润土为主要原料,掺加少量碱性材料,高温焙烧制成膨润土复合颗粒吸附剂。从碱度的释放、Mn2+去除率、饱和吸附量及颗粒散失率4方面对钢渣、白云石、粉煤灰、石灰石、炉渣和火山岩6种碱性材料进行对比研究,确定最佳膨润土复合颗粒吸附剂,并用其处理实际酸性矿山废水(AMD)。结果表明,钢渣是膨润土复合颗粒的最佳碱性材料,释放总碱度(以CaCO3计)为122.13mg/g;膨润土-钢渣复合颗粒对模拟废水中Mn2+去除率达99.31%,300h吸附量达130.15mg/g;其散失率小,为2.22%,强度大;膨润土-钢渣复合颗粒对实际酸性矿山废水中Mn2+、Fe2+去除率分别为89.66%、99.28%,去除效果良好。Aiming at the problem of mine drainage being acid and containing heavy metal ions, with bentonite as the main material, adding a small amount of basic refractories, bentonite composite granule adsorbent is prepared under high-temperature calcinations. The comparative study on six kinds of basic refractories which are steel slag, dolomite, fly ash, limestone, slag, volcanic from the release of alkalinity, the removal efficiency of Mn2＋, saturated adsorption capacity and the lost ratios of the granule four aspects, to determine the best multifunction bentonite composite granule adsorbent. The results show that steel slag is the best basic refractories in bentonite composite granule, the release of total alkalinity （by CaCO3） of 122.13 mg/g; the removal efficiency of Mn2＋ is 99.31%, adsorptive capacity is 130.15 mg/g for 300 h; the lost ratios of the granule of 2.22% and the granule is adamant; the bentonite-steel slag composite granule adsorbent treats actual acid mine drainage （AMD） well, the removal efficiency of Mn2＋ and Fe2＋ is 89.66% and 99.28%.

关 键 词：酸性矿山废水 重金属离子 膨润土 复合颗粒吸附剂 碱性材料吸附作用 

分 类 号：TQ424.24[化学工程] X751[环境科学与工程—环境工程]