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硫酸改性污泥活性炭对水中Cr~(6+)的吸附

Keywords: 污泥活性炭,硫酸,六价铬,吸附动力学

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Abstract:

用硫酸改性污泥活性炭考察硫酸浓度及改性时间对活性炭吸附容量的影响,在最佳改性条件下研究了振荡时间、初始浓度、pH值对活性炭吸附Cr6+的影响.并对改性前后污泥活性炭吸附Cr6+的等温吸附特性、动力学模型进行分析.结果表明:采用体积比为1∶5的硫酸,改性2h,活性炭对Cr6+吸附容量达9.44mg/g,较原污泥活性炭提高了53%;改性前后污泥活性炭对Cr6+的吸附均符合Langmuir等温吸附模型和准二级动力学模型.

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