矿物材料/PAM吸附-混凝处理含Mn2+酸性矿山废水 |
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引用本文: | 肖利萍,李莹,刘喆.矿物材料/PAM吸附-混凝处理含Mn2+酸性矿山废水[J].非金属矿,2016(2). |
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作者姓名: | 肖利萍 李莹 刘喆 |
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作者单位: | 辽宁工程技术大学建筑工程学院,辽宁阜新,123000 |
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基金项目: | 国家自然科学基金(51174267、51474122);辽宁省“百千万人才工程”项目(2014921069);辽宁省高校科研立项计划(2008300)。 |
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摘 要: | 采用环境矿物材料膨润土、钢渣、膨润土-钢渣复合粉末及复合颗粒对含Mn2+酸性矿山废水进行对比处理试验,确定最佳吸附剂及其与聚丙烯酰胺(PAM)联用技术的最佳反应条件。结果表明,5∶5膨润土-钢渣复合粉末对含Mn2+酸性矿山废水处理效果最好;对于pH值为3~3.5、Mn2+质量浓度为50 mg/L的酸性矿山废水,当复合吸附剂用量为3 g/L、PAM投加量为0.4 mg/L、吸附时间为120 min时,Mn2+去除率可达96.12%,处理后溶液pH值为8.91,浊度为4.0 NTU,可达标排放。膨润土-钢渣复合粉末与PAM吸附-混凝联用对含Mn2+酸性矿山废水的处理效果比单独吸附有较大程度提高,可实现泥水分离,且处理成本较低,值得推广应用。
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关 键 词: | 膨润土 钢渣 吸附 混凝 Mn2%2B 协同作用 |
Adsorption-Coagulation of Acid Mine Wastewater Containing Mn2+ by Environment Mineral Material and PAM |
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Abstract: | AbstractEnvironmental mineral materials such as bentonite, steel slag, composite power and particle of two materials were prepared to treat acid mine drainage containing Mn2+; the optimum adsorption material and best reaction condition were determined. The experimental results showed that 5∶5 bentonite-slag composite powder performed best. For acid mine wastewater with initial pH value 3~3.5 and concentration of 50 mg/L, the removal rate of Mn2+ was 96.12% when adsorbent dose was 3 g/L, PAM dose was 0.4 mg/L and adsorption time was 120 min. The wastewater pH value was 8.91 and turbidity was 4.0 NTU which can met discharge standard. The bentonite-slag composite powder combined with PAM had greater effect than sole adsorption process realizing spate separation and reducing the cost. It is worth to extensive application. |
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Keywords: | bentonite steel slag adsorption coagulation Mn2+ synergistic reaction |
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