Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 210, Issue -, Pages 10-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2018.07.090
Keywords
Algae removal; Flocculant; Chitosan; UV initiation; Graft copolymerization
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Funding
- National Natural Science Foundation of China [51508268]
- National Key Research and Development Program of China [2017YFB0602500]
- Natural Science Foundation of the Jiangsu Province in China [BK20150951]
- China Postdoctoral Science Foundation [2016 M591835]
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The graft copolymer flocculant of chitosan namely, maleoyl chitosan-graft-poly(acrylamide-acryloxyethyl trimethyl ammonium chloride) [MHCS-g-P(AM-DAC)], was prepared by UV initiation to improve the solubility and flocculation efficiency of chitosan. Flocculating properties for algae removal were studied systematically. The effects of parameters such as monomer concentration, MHCS content, illumination time, photoinitiator concentration, cationic degree, pH and grafting efficiency over synthesis process of MHCS-g-P(AM-DAC) were studied. The characterization of obtained MHCS-g-P(AM-DAC) were carried out through different analytic techniques. The influences of dosage, pH, and G value on the flocculating properties were also investigated to support that MHCS-g-P(AM-DAC) was more effective than organic flocculant (CPAM) and inorganic coagulant (PFS and PAC) on algae removal. The flocculation mechanisms of MHCS-g-P(AM-DAC) were determinate by obtained zeta values.
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