Issue 63, 2016

Thiourea modified polyacrylnitrile fibers as efficient Pd(ii) scavengers

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

Supplementary files

Article information

Article type
Paper
Submitted
14 Apr 2016
Accepted
01 Jun 2016
First published
02 Jun 2016

RSC Adv., 2016,6, 58088-58098

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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