Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

doi:10.1016/j.cjche.2016.07.008

›› 2016, Vol. 24 ›› Issue (10): 1344-1352.DOI: 10.1016/j.cjche.2016.07.008

• Separation Science and Engineering • 上一篇下一篇

Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

Xiaoxia Yao¹, Huicai Wang^1,2, Zhenhua Ma¹, Mingqiang Liu¹, Xiuqing Zhao¹, Dai Jia¹

1 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
2 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China

收稿日期:2015-07-23 修回日期:2016-05-04 出版日期:2016-10-28 发布日期:2016-11-19
通讯作者: Huicai Wang,E-mail address:wanghuicai@tjpu.edu.cn.
基金资助:
Supported by the Tianjin and MOST Innovation Fund for Small Technology-based Firms (14ZXCXGX00724, 13C26211200305) and Science and Technology Support Program (13ZCZDSF00100).

Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

Xiaoxia Yao¹, Huicai Wang^1,2, Zhenhua Ma¹, Mingqiang Liu¹, Xiuqing Zhao¹, Dai Jia¹

1 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
2 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China

Received:2015-07-23 Revised:2016-05-04 Online:2016-10-28 Published:2016-11-19
Supported by:
Supported by the Tianjin and MOST Innovation Fund for Small Technology-based Firms (14ZXCXGX00724, 13C26211200305) and Science and Technology Support Program (13ZCZDSF00100).

摘要/Abstract

摘要： A fast and selective adsorbent for Hg(II) from aqueous solutions using thiourea (TU) functionalized polypropylene fiber grafted acrylic acid (PP-g-AA), PP-g-AA-TU fibers,was characterized by Fourier transforminfrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption behavior of the functionalized chelating fibers for Hg(II) was investigated by static adsorption experiments, and the effects of some essential factors on adsorption of Hg(II) were examined, such as pH, initial concentration, adsorption time, coexisting cations, and temperature. The results showed that the adsorptive equilibrium could be achieved in 10 min, and the equilibrium adsorption quantity of PP-g-AA-TU fibers was 20 times that of PP-g-AA fibers. The PP-g-AA-TU fibers showed a very high adsorption rate and a good selectivity for Hg(II) over a wide range of pH. The adsorption isotherm can be well described with Langmuir model, with the maximum adsorption capacity for Hg(II) up to 52.04 mg·g^-1 and the removal of Hg(II) more than 97%. The kinetic data indicate that the adsorption process is best-fitted into the pseudo-second-order model.

关键词: Thiourea, Chelating fiber, Adsorption, Mercury ions, Aqueous solution

Abstract: A fast and selective adsorbent for Hg(II) from aqueous solutions using thiourea (TU) functionalized polypropylene fiber grafted acrylic acid (PP-g-AA), PP-g-AA-TU fibers,was characterized by Fourier transforminfrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption behavior of the functionalized chelating fibers for Hg(II) was investigated by static adsorption experiments, and the effects of some essential factors on adsorption of Hg(II) were examined, such as pH, initial concentration, adsorption time, coexisting cations, and temperature. The results showed that the adsorptive equilibrium could be achieved in 10 min, and the equilibrium adsorption quantity of PP-g-AA-TU fibers was 20 times that of PP-g-AA fibers. The PP-g-AA-TU fibers showed a very high adsorption rate and a good selectivity for Hg(II) over a wide range of pH. The adsorption isotherm can be well described with Langmuir model, with the maximum adsorption capacity for Hg(II) up to 52.04 mg·g^-1 and the removal of Hg(II) more than 97%. The kinetic data indicate that the adsorption process is best-fitted into the pseudo-second-order model.

Key words: Thiourea, Chelating fiber, Adsorption, Mercury ions, Aqueous solution

Xiaoxia Yao, Huicai Wang, Zhenhua Ma, Mingqiang Liu, Xiuqing Zhao, Dai Jia. Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber[J]. , 2016, 24(10): 1344-1352.

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Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

Adsorption of Hg(II) from aqueous solution using thiourea functionalized chelating fiber

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