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微波法制备污泥活性炭研究

Keywords: 污泥,微波,活性炭,吸附

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Abstract:

采用微波加热法,以污水厂剩余污泥为原料,磷酸为污泥活化剂制备污泥活性炭。微波功率、辐照时间和磷酸浓度对污泥活性炭吸附性能具有显著影响,在最佳工艺条件微波功率480W、辐照时间315s和磷酸浓度40%条件下制得的活性炭碘值301mg/g,比表面积168m2/g,污泥中重金属绝大部分被固化。与传统商品炭相比,污泥炭孔隙结构以中孔为主。利用该活性炭处理城市生活污水处理厂出水,COD去除率可达87%以上,污泥炭的吸附等温线用Langmuir等温吸附模型进行描述。

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