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脱灰煤基活性炭吸附处理含镉废水

Keywords: 煤基活性炭,含镉废水,吸附,分形动力学

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Abstract:

考察了硝酸脱灰煤样自制活性炭对Cd(Ⅱ)的吸附去除特征。结果表明,随煤样粒径的减小,活性炭的吸附能力增强,吸附过程符合分形动力学特征;随着镉浓度的升高,活性炭对镉的吸附量增加,活性炭吸附镉符合Langmuir等温方程,镉离子在活性炭上的吸附属单分子层吸附;煤基活性炭适宜的吸附除镉条件为粒径0.054mm、Cd(Ⅱ)初始浓度35mg/L、活性炭用量0.05g、吸附时间1h,此时的吸附容量达40mg/g。

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