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Preparation of a novel polyfunctional and high adsorption capacity adsorbent by laccase-catalyzed self-polymerization of GAL and cross-linking with PEI

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Abstract

A novel polyfunctional and high adsorption capacity adsorbent was prepared by laccase-catalyzed self-polymerization of GAL and cross-linking with PEI. When the mass ratio of GAL and PEI is 2 : 1, the self-polymerization temperature, pH and time are 50 °C, 4.5 and 24 h respectively, and the cross-linking temperature, pH and time are 70 °C, 8–9 and 24 h respectively, the PGAL–PEI has an excellent adsorption capacity for metal ions. The absorbed amounts reached 159 mg g−1, 88.23 mg g−1, 320.8 mg g−1, 511.36 mg g−1, 234.2 mg g−1 and 174.8 mg g−1 for Zn(II), Fe(III), Cu(II), Pb(II), Cd(II) and Cr(III) respectively at 25 °C and pH = 5. The stability experiment showed that PGAL–PEI has good stability under acidic conditions. These findings suggest that PGAL–PEI has considerable potential for application in metal ion removal from waste water.

Graphical abstract: Preparation of a novel polyfunctional and high adsorption capacity adsorbent by laccase-catalyzed self-polymerization of GAL and cross-linking with PEI

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Publication details

The article was received on 15 Sep 2018, accepted on 01 Nov 2018 and first published on 06 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04689A
Citation: New J. Chem., 2019, Advance Article
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    Preparation of a novel polyfunctional and high adsorption capacity adsorbent by laccase-catalyzed self-polymerization of GAL and cross-linking with PEI

    C. Li, T. Wang, Y. Luo, F. Wang, H. Zhu and Y. Guo, New J. Chem., 2019, Advance Article , DOI: 10.1039/C8NJ04689A

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