title: Microwave assisted preparation of n-butylacrylate grafted chitosan and its application for Cr(VI) adsorption.
abstract: Biopolymers such as chitosan possess excellent properties suited for varied applications. In this work, we describe a novel microwave assisted method for the preparation of n-butylacrylate grafted chitosan adsorbent and its utility for the adsorption of chromium(VI). A 3 min irradiation time was enough to prepare the adsorbent, and techniques such as FT-IR, powder XRD, SEM and EDS were used for comprehensive characterization. The adsorption was effective at pH 3.5 with 25 mL of 20 ppm Cr(VI) solution. Langmuir, Freundlich, Dubinin-Radushkevich, Temkin, Elovich and Redlich isotherms were studied in detail. The ΔG, ΔH and ΔS parameters were evaluated to understand the adsorption thermodynamics. The adsorption involves the interaction of Cr(VI) with the hydroxyl and amino groups in chitosan.
authors: Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India.
authors: A
authors: A
authors: Santhana Krishna Kumar
authors: Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India.
authors: Chinta
authors: C
authors: Uday Kumar
authors: Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad campus, Jawahar Nagar, Shameerpet Mandal R.R. Dist, 500 078 AP, India.
authors: Vidya
authors: V
authors: Rajesh
authors: Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, 500 078 AP, India. Electronic address: nrajesh05@gmail.com.
authors: N
authors: N
authors: Rajesh
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000327:Adsorption; D001704:Biopolymers / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D008872:Microwaves; D012996:Solutions / Q000737:chemistry; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D000179:Acrylates; D001704:Biopolymers; D007220:Industrial Waste; D012996:Solutions; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion; C032490:n-butyl acrylate; D048271:Chitosan
keywords: Chitosan; Chromium(VI); Graft polymerization; Microwave; n-Butylacrylate