title: Synthesis, characterization and application of novel cationic and amphoteric flocculants based on amylopectin.
abstract: The synthesis of novel cationic flocculants based on amylopectin (AP), acrylamide (AM) and (3-acrylamidopropyl) trimethylammonium chloride (ATMAC) were done by free radical polymerization using ammonium persulphate (APS) as an initiator. Three different grades of novel cationic flocculants (AP-g-C 1 to AP-g-C 3) were synthesized by varying the proportion of acrylamide and (3-acrylamidopropyl) trimethylammonium chloride monomers. Through the hydrolysis of these flocculants, in presence of NaOH, three different grades of amphoteric polymers (AP-AT-C 1 to AP-AT-C 3) were synthesized. The synthesized polymers were characterized by various methods, namely, infrared spectroscopy, NMR spectroscopy, thermal analysis, viscosity measurement, scanning electron microscopy and X-ray diffractometry. The flocculation performance of AP-g-C and AP-AT-C were studied in kaolin suspension using jar test and settling test methods at neutral pH. Dye (Methylene blue) removal tests were performed using polymer beads and analysed by UV-vis spectroscopy.
authors.affiliation: Department of Chemistry, Centre of Advanced Studies, Banaras Hindu University, Varanasi 221005, India.
authors.forename: Krishna
authors.initials: K
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, Centre of Advanced Studies, Banaras Hindu University, Varanasi 221005, India. Electronic address: dr.pubali@gmail.com.
authors.forename: Pubali
authors.initials: P
authors.lastname: Adhikary
authors.affiliation: Department of Mining Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India.
authors.forename: N C
authors.initials: NC
authors.lastname: Karmakar
authors.affiliation: Department of Mining Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India.
authors.forename: Suprakash
authors.initials: S
authors.lastname: Gupta
authors.affiliation: Indian Institute of Science Education and Research, Pune 411021, India.
authors.forename: Ram Prakash
authors.initials: RP
authors.lastname: Singh
authors.affiliation: Department of Chemistry, Centre of Advanced Studies, Banaras Hindu University, Varanasi 221005, India. Electronic address: dr.skmoorthi@gmail.com.
authors.forename: S
authors.initials: S
authors.lastname: Krishnamoorthi
mesh_terms: D020106:Acrylamide / Q000737:chemistry*; D000645:Ammonium Sulfate / Q000737:chemistry; D000687:Amylopectin / Q000031:analogs & derivatives / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D005427:Flocculation; D006868:Hydrolysis; D058105:Polymerization; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry
chemical_list: D002412:Cations; D000644:Quaternary Ammonium Compounds; D020106:Acrylamide; C031276:ammonium peroxydisulfate; D012972:Sodium Hydroxide; D000687:Amylopectin; D000645:Ammonium Sulfate; C523720:(3-acrylamidopropyl)trimethylammonium chloride
keywords: Amphoteric polymers; Amylopectin; Cationic polymers; Dye removal; Flocculation; Polymer beads