Issue 2, 2012
From the journal:

RSC Advances

A novel efficient cationic flocculant prepared through grafting two monomers onto chitosan induced by Gamma radiation†

Jian-Ping Wang,ab   Yong-Zhen Chen,a   Yi Wang,b   Shi-Jie Yuan,a   Guo-Ping Shenga  and  Han-Qing Yu*a  

* Corresponding authors

a Department of Chemistry, University of Science & Technology of China, Hefei, China
E-mail: hqyu@ustc.edu.cn
Fax: +86 551 3601592
Tel: +86 551 3607592

b Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.

Abstract

Two monomers, acrylamide (AM) and (2-methacryloyloxyethyl) trimethyl ammonium chloride (DMC) were grafted onto chitosan simultaneously in acid-water solution initiated by the highly efficient and environmentally friendly gamma ray radiation at ambient temperatures. The copolymer obtained was analyzed using Fourier-transform infrared, X-ray powder diffraction and thermogravimetric analysis. The cationic degree of the copolymer was determined by the colloid titration method. Its flocculation properties were evaluated in 0.25% (wt) kaolin suspensions and its significant superiority over PAM (polyacrylamide) and chitosan was observed. The results of zeta potential measurement demonstrated that the flocculation mechanism of the copolymer was distinct when it was used as a flocculant under different conditions. The images and the settling rate test of the floccules after treating by the flocculant showed that the capacities of bridging and charge neutralization of the graft copolymer were improved after the grafting of AM and DMC. Jar tests with pulp mill wastewater demonstrated that the flocculation efficiency of the graft copolymer was much better than that of PAM.

Graphical abstract: A novel efficient cationic flocculant prepared through grafting two monomers onto chitosan induced by Gamma radiation

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Article information

DOI
https://doi.org/10.1039/C1RA00473E
Article type
Paper
Submitted
17 Jul 2011
Accepted
27 Sep 2011
First published
14 Nov 2011

RSC Adv., 2012,2, 494-500

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A novel efficient cationic flocculant prepared through grafting two monomers onto chitosan induced by Gamma radiation

J. Wang, Y. Chen, Y. Wang, S. Yuan, G. Sheng and H. Yu, RSC Adv., 2012, 2, 494 DOI: 10.1039/C1RA00473E

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