Abstract
Peanut shell (PNS) was used to prepare a novel adsorbent to achieve resource recovery of the agricultural residue. The hydroxyl groups of peanut shell were turned into –C(CH3)2–Br pendant groups to initiate polymerization of acrylonitrile. Graft copolymer peanut shell/polyacrylonitrile (PNS-g-PAN) was modified by hydroxylamine hydrochloride to transform the cyano groups into amidoxime (AO) groups. The modified copolymer of AO-PNS-g-PAN was used as adsorbent. The maximum adsorption capacity for Hg(II) was 4.45 mmol g−1. The adsorption process fitted well the Freundlich isotherm model and followed pseudo-second-order model. The modified copolymer demonstrated its potential as an efficient adsorbent to solve the problem of Hg(II) contamination.
Graphical abstract
The peanut shell (PNS) macroinitiator was obtained by acylation of hydroxyl groups on the cellulose backbone of the peanut shell and initiated by Cu(0)-mediated RDRP of acrylonitrile. PNS-g-PAN was modified by NH2OH·HCl and used to remove heavy metal ions. The maximum adsorption capacity of Hg(II) was 4.45 mmol g−1.
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Acknowledgments
The finance was supported by the National Natural Science Foundation of China (Nos. 21404051 and 21404052), the Natural Science Foundation of Shandong Province (Nos. ZR2014BQ016 and BS2014CL040), the Talent Introduction Special Funds of Ludong University (Nos. 2014012 and 2014017), the Natural Science Foundation for Distinguished Young Scholars of Shandong province (No. JQ201203).
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Bai, L., Wang, D., Chen, H. et al. Synthesis of peanut shell/polyacrylonitrile copolymer via Cu(0)-mediated RDRP and its adsorption behavior after modification. Polym. Bull. 72, 2455–2469 (2015). https://doi.org/10.1007/s00289-015-1423-3
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DOI: https://doi.org/10.1007/s00289-015-1423-3