title: Surfactant mediated synthesis of poly(acrylic acid) grafted xanthan gum and its efficient role in adsorption of soluble inorganic mercury from water.
abstract: Noble copolymers from xanthan gum (XG) and poly(acrylic acid) (PAA) were synthesised through surfactant mediated graft copolymerization. The copolymers were applied as a biosorbent for inorganic Hg(II) at higher concentration level (300ppm). The copolymers were characterized using different analytical techniques which showed, the grafting principally occurred across the amorphous region of XG. Measurement of zeta potential and hydrodynamic size indicated, the copolymers were strong polyanion and possessed greater hydrodynamic size (almost in all cases) than XG, despite a strong molecular degradation that took place simultaneously during grafting. In the dispersed form, all grades of the copolymer displayed higher adsorption capability than XG, however, the grade with maximum grafting produced the highest efficiency (68.03%). Manipulation produced further improvement in efficiency to 72.17% with the same copolymer after 75min at a pH of 5.0. The allowable biosorbent dose, however, was 1000ppm as determined from the experimental evidences.
authors: Department of Polymer Science and Technology, University of Calcutta 92, A.P.C. Road, Kolkata-700009, India.
authors: Abhijit
authors: A
authors: Pal
authors: KIIT School of Biotechnology, KIIT University Campus-XI, Patia, Bhubaneswar 751024, Orissa, India.
authors: Kunal
authors: K
authors: Majumder
authors: Department of Polymer Science and Technology, University of Calcutta 92, A.P.C. Road, Kolkata-700009, India. Electronic address: abpoly@caluniv.ac.in.
authors: Abhijit
authors: A
authors: Bandyopadhyay
mesh_terms: D000180:Acrylic Resins / Q000138:chemical synthesis / Q000737:chemistry; D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D008628:Mercury / Q000737:chemistry*; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000180:Acrylic Resins; D011135:Polysaccharides, Bacterial; D013501:Surface-Active Agents; C006903:carbopol 940; D008628:Mercury; C002563:xanthan gum
keywords: Biosorbent; Graft copolymerization; Inorganic Hg(II); Polyanion; Xanthan gum