title: Arsenite and arsenate removal from wastewater using cationic polymer-modified waste tyre rubber.
abstract: Waste tyre rubber (WTR) granulate was modified with a cationic polymer, poly(3-acrylamidopropyl)trimethylammonium chloride (p(APTMACl)). The resulting WTR/p(APTMACl) was utilized for the adsorption of arsenite, As(III) and arsenate, As(V) from aqueous medium in both batch and column methods. The level of adsorption increased gradually with increasing monomer concentration and contact time. The adsorption behavior obeyed the Freundlich model, and the rate of adsorption could be predicted by employing the pseudo-second order model. In the column method, As(V) could be adsorbed onto the sorbent more effectively than As(III). Remarkable desorption of As(III) and As(V) (99 and 92%, respectively) from the adsorbent was achieved using 0.10 M HCl as eluent. An approach of evaluation of adsorption capacity uncertainty is proposed.
authors.affiliation: Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand. Electronic address: iapichat@chula.ac.th.
authors.forename: Apichat
authors.initials: A
authors.lastname: Imyim
authors.affiliation: Program of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Thitayati
authors.initials: T
authors.lastname: Sirithaweesit
authors.affiliation: Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Vithaya
authors.initials: V
authors.lastname: Ruangpornvisuti
mesh_terms: D000327:Adsorption; D001149:Arsenates / Q000032:analysis* / Q000737:chemistry; D018053:Arsenites / Q000032:analysis* / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D007700:Kinetics; D011108:Polymers / Q000737:chemistry; D059027:Recycling; D012408:Rubber / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D001149:Arsenates; D018053:Arsenites; D002412:Cations; D011108:Polymers; D012408:Rubber; D062065:Wastewater; D014874:Water Pollutants, Chemical; C015001:arsenite; C025657:arsenic acid
keywords: Adsorption; Arsenate; Arsenite; Cationic polymer; Waste tyre rubber