Adsorption of heavy metals by a porous bioadsorbent from lignocellulosic biomass reconstructed in an ionic liquid

Journal of Agricultural and Food Chemistry
Lin-Xin ZhongRun-Cang Sun

Abstract

A novel porous bioadsorbent for metal ion binding (Pd(2+) and Cd(2+)) was successfully prepared from lignocellulosic biomass in ionic liquid by homogeneous succinoylation and sequent chemical cross-linking. The morphology of the bioadsorbent and the interaction between bioadsorbent and metal ions was revealed by scanning electron microscopy and Fourier transform infrared spectroscopy. Results showed that the adsorption mechanism of the bioadsorbent was an ion exchange. A lower dose of cross-linker or higher carboxyl content increased the adsorption capacities of Pd(2+) and Cd(2+). The adsorption capacities of Pd(2+) and Cd(2+) remarkably increased as the pH of metal ion solutions increased. The pores in the bioadsorbent greatly favored the diffusion and adsorption of metal ions, and the adsorption equilibrium time was about 50 min. The adsorption of metal ions could be well explained by the Langmuir model, and the maximum adsorption capacities of Pd(2+) and Cd(2+) were 381.7 and 278.6 mg/g.

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Citations

Dec 1, 2017·International Journal of Environmental Research and Public Health·Xiaotao ZhangZhangjing Chen
Oct 30, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Huixin ZhangJie Zhang
Jan 15, 2020·Environmental Science and Pollution Research International·Maria Roniele Félix OliveiraCarlucio Roberto Alves
Jul 30, 2020·Environmental Technology·Gustavo Bordon SiaFlávia Vieira da Silva Medeiros
Nov 8, 2018·The Science of the Total Environment·José A Fernández-LópezMarta Doval Miñarro
Jun 11, 2014·Journal of Agricultural and Food Chemistry·Xiao-kun OuYangChong-Yu Wang
Jun 13, 2020·Ecotoxicology and Environmental Safety·Kovo G Akpomie, Jeanet Conradie

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