A chitosan-based flocculant prepared with gamma-irradiation-induced grafting |
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Authors: | Wang Jian-Ping Chen Yong-Zhen Zhang Shu-Juan Yu Han-Qing |
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Institution: | Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China. |
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Abstract: | A natural polymer, chitosan, was modified to prepare an efficient flocculant using grafting method initiated by gamma ray in acid-water solution. A vinyl monomer, acrylamide, was used as the grafted monomer. The graft copolymer obtained was characterized using Fourier transform infrared spectroscopy, X-ray diffraction and thermogravimetric analysis. Effects of acetic acid concentration, total irradiation dose, dose rate and monomer concentration on the grafting percentage were investigated. Flocculation experiment results demonstrated that the graft copolymer produced was significantly superior to chitosan and polyacrylamide (PAM). |
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