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化工进展  2015 

亚甲基蓝在石棉尾矿酸浸渣上的吸附行为

DOI: 10.16085/j.issn.1000-6613.2015.07.039, PP. 2043-2048

Keywords: 石棉尾矿,酸浸渣,亚甲基蓝,吸附

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Abstract:

采用XRD、FT-IR等手段分别对石棉尾矿和石棉尾矿酸浸渣进行表征。利用活化煅烧的石棉尾矿酸浸渣对亚甲基蓝(MB)进行静态吸附研究,探讨了吸附剂投加量、吸附时间、pH值、离子强度和温度等因素对吸附作用的影响。结果表明pH值、离子强度和温度对亚甲基蓝在石棉尾矿酸浸渣上的吸附影响较大。当pH<4.5时,吸附量随着pH值的增大而增大,随后pH值增大,吸附量基本不变;亚甲基蓝在石棉尾矿酸浸渣上的吸附随离子强度的增大而降低;通过相关热力学研究计算吸附过程为吸热过程,即高温利于吸附;亚甲基蓝在石棉尾矿酸浸渣上的吸附动力学符合Lagrange准二级方程;热力学符合Langmuir等温线方程。

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