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首页> 外文会议>International Conference on Energy, Environment and Sustainable Development >Removal of Arsenic from Landfill Leachate by Selected Low-cost Sorbents: an Experimental Study at the Zixiaguan Landfill of Wuhan City, Central China
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Removal of Arsenic from Landfill Leachate by Selected Low-cost Sorbents: an Experimental Study at the Zixiaguan Landfill of Wuhan City, Central China

机译：选定的低成本吸附剂从垃圾填埋渗滤液中取出砷：中国中部武汉市紫竹川垃圾填埋场实验研究

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摘要

The leachate from the Zixiaguan landfill of Wuhan City contains a lot of undesirable or toxic chemicals, among which arsenic may have the most serious threat to environment and human health. Lowering the arsenic concentration in the leachate is therefore of extreme importance. In this study, natural sediments obtained from Wuhan City, including clay, silty soil and silty sand, were used as low-cost sorbents to remove arsenic from solution. The results of the batch sorption experiments indicate that the sorption processes of clay and silty sand match well with linear isothermal sorption model, while that of silty soil is in good accordance with Langmuir isothermal sorption model. Among the three sorbents, clay has the best ability for arsenic removal from solution. Further experiments were carried out to determine the optimum sorption conditions for clay sorbent, the results showing that as the ratio of sorbent dosage to solution volume is 25.0 g/L, the reaction time is 120 min, and the pH of solution equals 7.0, the removal rate of arsenic from the leachate by clay sorbent reaches the highest value of 99.3%.
机译：武汉市紫竹川垃圾填埋场的渗滤液含有许多不良或有毒化学品，其中砷可能对环境和人类健康有最严重的威胁。因此，降低渗滤液中的砷浓度非常重要。在这项研究中，使用武汉市（包括粘土，粉质土壤和粉煤）获得的天然沉积物作为低成本吸附剂，以从溶液中除去砷。分批吸附实验的结果表明，粘土和粉状砂的吸附过程与线性等温吸附模型良好，而粉质土壤的含量良好是良好的琅勃勃等温吸附模型。在三种吸附剂中，粘土具有从溶液中除去砷的最佳能力。进行进一步的实验以确定粘性吸附剂的最佳吸附条件，结果表明，随着吸附剂剂量与溶液体积的比例为25.0g / L，反应时间为120分钟，溶液的pH值等于7.0，通过粘土吸附剂从渗滤液中取出砷的去除率达到99.3％的最高值。

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