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改性甘蔗渣对Cu2+和Zn2+的吸附机理

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齐亚凤, 何正艳, 余军霞, 池汝安. 改性甘蔗渣对Cu2+和Zn2+的吸附机理[J]. 环境工程学报, 2013, 7(2): 585-590.
引用本文: 齐亚凤, 何正艳, 余军霞, 池汝安. 改性甘蔗渣对Cu2+和Zn2+的吸附机理[J]. 环境工程学报, 2013, 7(2): 585-590.
shu
Qi Yafeng, He Zhengyan, Yu Junxia, Chi Ruan. Adsorption mechanism for Cu2+ and Zn2+ by modified bagasse[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 585-590.
Citation: Qi Yafeng, He Zhengyan, Yu Junxia, Chi Ruan. Adsorption mechanism for Cu2+ and Zn2+ by modified bagasse[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 585-590.
shu

改性甘蔗渣对Cu2+和Zn2+的吸附机理

  • 1.

    武汉工程大学化工与制药学院,绿色化工过程省部共建教育部重点实验室,武汉 430073

  • 基金项目:

    教育部创新团队项目 (IRT0974)

    教育部科学技术研究重点项目 (211114)

    武汉市晨光计划(201150431098)

  • 中图分类号: X703

Adsorption mechanism for Cu2+ and Zn2+ by modified bagasse

  • 1.

    Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China

  • Fund Project:

  • 摘要: 研究了均苯四甲酸二酐(PMDA)和乙二胺四乙酸二酐(EDTAD)改性甘蔗渣对重金属离子Cu2+和Zn2+的吸附性能,包括吸附动力学和吸附等温线。结果表明, 改性后的甘蔗渣对重金属离子Cu2+和Zn2+的吸附容量有显著提高,对Cu2+和Zn2+吸附等温线均符合Langmuir方程,吸附为单分子层吸附。根据Langmuir方程,PMDA和EDTAD改性甘蔗渣对Cu2+的吸附量分别为60.21和33.45 mg/g,对Zn2+的吸附量分别是70.53和36.53 mg/g。两种改性甘蔗渣对两种金属离子的吸附在30 min内均可完成,用准二级吸附动力学方程模拟动力学过程得到较好的线性相关性。以EDTA溶液为洗脱剂对吸附Cu2+和Zn2+的改性甘蔗渣进行洗脱再生,再生的吸附剂可反复使用。
    Abstract: The adsorption properties including adsorption kinetics and adsorption isotherm of the PMDA and EDTAD modified bagasse for heavy metal ions of Cu2+ and Zn2+ were investigated. Experimental results showed that the adsorption capacity of the PMDA and EDTAD modified bagasse was improved significantly. The adsorption data of the two metal ions both fitted Langmuir adsorption isotherm, which indicating that adsorption for metal ions was a monolayer adsorption. According to Langmuir model, the adsorption capacities of the PMDA and EDTAD modified bagasse for Cu2+ were 60.21 and 33.45 mg/g, and that for Zn2+ were 70.53 and 36.53 mg/g, respectively. Adsorption process could be finished within 30 min, and could be fitted better with pseudo-second-order kinetic model than pseudo-second-order and intra-particle diffusion kinetic model. The adsorbed Cu2+and Zn2+on the modified bagasse could be effectively desorbed in an EDTA solution, and the regenerated bagasse could be reused with little loss of the adsorption capacity.
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  • [1] 鲁栋梁, 夏璐. 重金属废水处理方法与进展. 化工技术与开发, 2008,37(12):32-35 Lu D. L., Xia L. Treatment method of heavy metal wastewater and its progress. Technology & Development of Chemical Industry, 2008,37(12):32-35(in Chinese)
    [2] 黄君涛, 熊帆, 谢伟立, 等. 吸附法处理重金属废水研究进展. 水处理技术, 2006,32(2):9-12 Huang J. T., Xiong F., Xie W. L., et al. Progress in researches on treatment of heavy metal wastewater by adsorption process. Technology of Water Treatment, 2006,32(2):9-12(in Chinese)
    [3] Wan Ngah W. S., Hanafiah M. A. K. M. Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: A review. Bioresource Technology, 2008,99(10):3935-3948
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  • 收稿日期:  2012-01-17
  • 刊出日期:  2013-02-02

改性甘蔗渣对Cu2+和Zn2+的吸附机理

  • 1. 武汉工程大学化工与制药学院,绿色化工过程省部共建教育部重点实验室,武汉 430073
  • 收稿日期:  2012-01-17
基金项目:

教育部创新团队项目 (IRT0974)

教育部科学技术研究重点项目 (211114)

武汉市晨光计划(201150431098)

摘要: 研究了均苯四甲酸二酐(PMDA)和乙二胺四乙酸二酐(EDTAD)改性甘蔗渣对重金属离子Cu2+和Zn2+的吸附性能,包括吸附动力学和吸附等温线。结果表明, 改性后的甘蔗渣对重金属离子Cu2+和Zn2+的吸附容量有显著提高,对Cu2+和Zn2+吸附等温线均符合Langmuir方程,吸附为单分子层吸附。根据Langmuir方程,PMDA和EDTAD改性甘蔗渣对Cu2+的吸附量分别为60.21和33.45 mg/g,对Zn2+的吸附量分别是70.53和36.53 mg/g。两种改性甘蔗渣对两种金属离子的吸附在30 min内均可完成,用准二级吸附动力学方程模拟动力学过程得到较好的线性相关性。以EDTA溶液为洗脱剂对吸附Cu2+和Zn2+的改性甘蔗渣进行洗脱再生,再生的吸附剂可反复使用。

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