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Issue 63, 2016
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Thiourea modified polyacrylnitrile fibers as efficient Pd(II) scavengers

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Abstract

A series of thiourea modified fibers were prepared and characterized. The N-(2-aminoethyl)thiourea functionalized polyacrylonitrile fiber (AETU-PANF) was then evaluated for palladium absorption. The absorption process follows a pseudo-second-order model and the equilibrium data fit well to the Langmuir isotherm model. The maximum absorption capacity according to the Langmuir model was 169.2 mg g−1 with an absorption limit of 0.03 ppm. Wetted AETU-PANFs exhibited excellent absorption properties in organic solutions and the sorption rates were higher in organic solvents than in aqueous solutions. This is due to a special microenvironment that is formed inside the AETU-PANFs. The AETU-PANFs were also used to remove palladium from an organic solution containing active pharmaceutical ingredients. The Pd content was reduced from 310 ppm to 0.07 ppm.

Graphical abstract: Thiourea modified polyacrylnitrile fibers as efficient Pd(ii) scavengers

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Publication details

The article was received on 14 Apr 2016, accepted on 01 Jun 2016 and first published on 02 Jun 2016


Article type: Paper
DOI: 10.1039/C6RA09689A
RSC Adv., 2016,6, 58088-58098

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    Thiourea modified polyacrylnitrile fibers as efficient Pd(II) scavengers

    J. Cao, G. Xu, Y. Xie, M. Tao and W. Zhang, RSC Adv., 2016, 6, 58088
    DOI: 10.1039/C6RA09689A

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