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不同炭材料吸附Cr(VI)的热力学研究

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单鑫, 陈荟蓉, 禹洪丽, 韩彩芸, 朱文杰, 李曦同, 罗永明. 不同炭材料吸附Cr(VI)的热力学研究[J]. 环境工程学报, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
引用本文: 单鑫, 陈荟蓉, 禹洪丽, 韩彩芸, 朱文杰, 李曦同, 罗永明. 不同炭材料吸附Cr(VI)的热力学研究[J]. 环境工程学报, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
shu
Shan Xin, Chen Huirong, Yu Hongli, Han Caiyun, Zhu Wenjie, Li Xitong, Luo Yongming. Study of thermodynamics for adsorption of Cr(VI) by different carbon materials[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
Citation: Shan Xin, Chen Huirong, Yu Hongli, Han Caiyun, Zhu Wenjie, Li Xitong, Luo Yongming. Study of thermodynamics for adsorption of Cr(VI) by different carbon materials[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
shu

不同炭材料吸附Cr(VI)的热力学研究

  • 1.

    昆明理工大学环境科学与工程学院, 昆明 650500

  • 基金项目:

    国家自然科学基金资助项目(U1402233,21307046)

    云南省自然科学基金资助项目(201422060,2015FB120)

    云南省教育厅项目(2014Y077)

  • 中图分类号: X523

Study of thermodynamics for adsorption of Cr(VI) by different carbon materials

  • 1.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • Fund Project:

  • 摘要: 以4种碳基材料作为吸附剂,研究了不同吸附剂对Cr(VI)的去除效果,并对吸附热力学进行了研究。研究结果表明,木质活性炭和煤质活性炭对Cr(VI)的吸附效果较好;温度对木质活性炭与煤质活性炭的吸附能力影响较大,随着温度由298 K提升至343 K,其对Cr(VI)吸附能力提高50%以上,在343 K其最大吸附量分别为160.72 mg/g和151.88 mg/g;热力学参数研究说明2种活性炭吸附的过程为熵增过程;且随着温度升高,ΔG0的值变小,说明升高温度使吸附过程的自发程度增高。
    Abstract: Four carbon-based materials were employed as adsorbents to remove Cr(VI) from aqueous solution. Cr(VI) removal efficiency was investigated under different experimental conditions. The results demonstrated that wood-based activated carbon and coal-based activated carbon exhibited better Cr(VI)-adsorption performance. The experimental data indicating better Cr(VI) adsorption by wood-based and coal-based activated carbon illustrated that adsorption temperature plays a key role in determining adsorption performance. With rising temperature (298 to 343 K), the Cr(VI) adsorption capacity increased by more than 50%. The maximum Cr(VI) adsorption capacity of wood-based and coal-based activated carbon at 343 K were 160.72 and 151.88 mg/g, respectively. Thermodynamic parameters showed that the Cr(VI) adsorption processes of the two activated carbons were both entropy-increasing processes. As the temperature rose, the value of ΔG0 became smaller, which increased the degree of spontaneous adsorption.
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  • 收稿日期:  2015-02-20
  • 刊出日期:  2016-03-18
单鑫, 陈荟蓉, 禹洪丽, 韩彩芸, 朱文杰, 李曦同, 罗永明. 不同炭材料吸附Cr(VI)的热力学研究[J]. 环境工程学报, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
引用本文: 单鑫, 陈荟蓉, 禹洪丽, 韩彩芸, 朱文杰, 李曦同, 罗永明. 不同炭材料吸附Cr(VI)的热力学研究[J]. 环境工程学报, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
shu
Shan Xin, Chen Huirong, Yu Hongli, Han Caiyun, Zhu Wenjie, Li Xitong, Luo Yongming. Study of thermodynamics for adsorption of Cr(VI) by different carbon materials[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
Citation: Shan Xin, Chen Huirong, Yu Hongli, Han Caiyun, Zhu Wenjie, Li Xitong, Luo Yongming. Study of thermodynamics for adsorption of Cr(VI) by different carbon materials[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1109-1115. doi: 10.12030/j.cjee.20160317
shu

不同炭材料吸附Cr(VI)的热力学研究

  • 1. 昆明理工大学环境科学与工程学院, 昆明 650500
  • 收稿日期:  2015-02-20
基金项目:

国家自然科学基金资助项目(U1402233,21307046)

云南省自然科学基金资助项目(201422060,2015FB120)

云南省教育厅项目(2014Y077)

摘要: 以4种碳基材料作为吸附剂,研究了不同吸附剂对Cr(VI)的去除效果,并对吸附热力学进行了研究。研究结果表明,木质活性炭和煤质活性炭对Cr(VI)的吸附效果较好;温度对木质活性炭与煤质活性炭的吸附能力影响较大,随着温度由298 K提升至343 K,其对Cr(VI)吸附能力提高50%以上,在343 K其最大吸附量分别为160.72 mg/g和151.88 mg/g;热力学参数研究说明2种活性炭吸附的过程为熵增过程;且随着温度升高,ΔG0的值变小,说明升高温度使吸附过程的自发程度增高。

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