title: Synthesis, characterization and evaluation of dewatering properties of chitosan-grafting DMDAAC flocculants.
abstract: Flocculation is one of the most widely applied techniques for water treatment and sludge dewatering. A fresh environmentally friendly and powerful flocculant is highly eager in the sludge dewatering area. In this work, a highly efficient cationic flocculant, chitosan-g-PDMDAAC was synthesized through grafting a monomer, dimethy ldiallyl ammonium chloride(DMDAAC), onto chitosan initiated by ceric sulfate under ultrasonic-assisted and conventional heating condition. The graft copolymer was characterized using FT-IR, XRD and SEM. Further, the dewatering performance of municipal activated sludge was evaluated by the filter cake moisture content and specific resistance in filtration. Its application as a flocculant for wastewater treatment was investigated. The prepared chitosan-g-PDMDAAC showed a highly effective flocculation capability for activated sludge compared with chitosan, polyacrylamide(PAM), cationic polyacrylamide(CPAM).
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Danfeng
authors.initials: D
authors.lastname: Wang
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Tianqi
authors.initials: T
authors.lastname: Zhao
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Liuqing
authors.initials: L
authors.lastname: Yan
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Mi
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gu
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China. Electronic address: zhang_ym@jlu.edu.cn.
authors.forename: Yumin
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000498:Allyl Compounds / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D005374:Filtration / Q000379:methods*; D005427:Flocculation; D006358:Hot Temperature; D006801:Humans; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012722:Sewage / Q000032:analysis*; D013010:Sonication; D013464:Sulfuric Acids / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D000498:Allyl Compounds; D048271:Chitosan; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D013464:Sulfuric Acids; D000099166:Polyacrylamides; C042259:ceric sulfate; C508190:diallyldimethylammonium chloride
keywords: Chitosan; Efficient flocculant; Sludge dewatering