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Issue 62, 2017
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Novel poly(aniline-co-3-amino-4-methoxybenzoic acid) copolymer for the separation and recovery of Pd(II) from the leaching liquor of automotive catalysts

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Abstract

In this study, novel polyaniline-3-amino-4-methoxybenzoic acid (PANI–AMB) copolymers were prepared and used as adsorbents for the separation and recovery of Pd(II) from a mixed solution containing Pt, Pd, and Rh. Batch sorption studies were carried out, and the main adsorption parameters were systematically investigated. Furthermore, the relevant thermodynamic parameters, isotherms, and kinetic models were also evaluated. Results revealed a high adsorption capacity of 278.5 mg g−1 for Pd(II). Separation factors βPd/Pt and βPd/Rh were 4.3 × 103 and 5.3 × 103, respectively. Results obtained from scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) measurements indicated that the sorption of Pd(II) occurs mainly by chelation between Pd(II) and –NH–/–N[double bond, length as m-dash]/–COOH/–OCH3 and is accompanied by a redox mechanism involving the reduction of Pd(II) to Pd(0). The new PANI–AMB adsorbent showed efficient adsorption and separation of palladium from the leaching liquor of spent automotive catalysts, as well as good stability and reusability.

Graphical abstract: Novel poly(aniline-co-3-amino-4-methoxybenzoic acid) copolymer for the separation and recovery of Pd(ii) from the leaching liquor of automotive catalysts

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Publication details

The article was received on 08 Jun 2017, accepted on 05 Aug 2017 and first published on 11 Aug 2017


Article type: Paper
DOI: 10.1039/C7RA06404G
Citation: RSC Adv., 2017,7, 39244-39257
  • Open access: Creative Commons BY license
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    Novel poly(aniline-co-3-amino-4-methoxybenzoic acid) copolymer for the separation and recovery of Pd(II) from the leaching liquor of automotive catalysts

    L. Zhong, J. Zhang, Q. Zhang, M. Chen and Z. Huang, RSC Adv., 2017, 7, 39244
    DOI: 10.1039/C7RA06404G

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

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