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Metal Adsorbent Prepared from Poly(Methyl Acrylate)-Grafted Cassava Starch via Gamma Irradiation

Abstract

Metal adsorbent containing hydroxamic acid groups was successfully synthesized by radiation-induced graft copolymerization of methyl acrylate (MA) onto cassava starch. The optimum conditions for grafting were studied in terms of % degree of grafting (Dg). Conversion of the ester groups present in poly(methyl acrylate)-grafted-cassava starch copolymer into hydroxamic acid was carried out by treatment with hydroxylamine (HA) in the presence of alkaline solution. The maximum percentage conversion of the ester groups of the grafted copolymer, %Dg = 191 (7.63 mmol/g of MA), into the hydroxamic groups was 70% (5.35 mmol/g of MA) at the optimum conditions: in a mixture solution of 20% HA (w/v) and methanol solution (methanol:H{sub 2}O = 5:1) 300 mL, pH 13, reaction time 2 h, and 20 g of grafted copolymer. The adsorbent was characterized by FTIR, TGA, and DSC. The presence of electron donating groups in adsorbent containing hydroxamic acid groups gives the ability to form polycomplexes with metal ions. The ability of the adsorbent to adsorb various metals was investigated in order to evaluate the possibility of its use in metal adsorption. The adsorbent exhibited a remarkable % adsorption for Cd{sup 2+}, Al{sup 3+}, UO{sub 2} {sup 2+}, V{sup 5+} and Pb{sup 2+} at  More>>
Authors:
Suwanmala, P; Hemvichian, K; Srinuttrakul, W [1] 
  1. Nuclear Research and Development Group, Thailand Institute of Nuclear Technology, Bangkok (Thailand)
Publication Date:
Sep 15, 2012
Product Type:
Book
Resource Relation:
Other Information: 17 figs, 16 refs; Related Information: In: Development of Novel Adsorbents and Membranes by Radiation-induced Grafting for Selective Separation in Environmental and Industrial Applications| 290 p.
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; ACRYLATES; ADSORBENTS; ADSORPTION; ALUMINIUM IONS; CADMIUM IONS; CASSAVA; COPOLYMERS; ESTERS; FOURIER TRANSFORMATION; GAMMA RADIATION; HYDROXAMIC ACIDS; INFRARED SPECTRA; LEAD IONS; METALS; METHANOL; SOLUTIONS; STARCH; THERMAL GRAVIMETRIC ANALYSIS; URANIUM DIOXIDE; VANADIUM IONS
OSTI ID:
22012233
Research Organizations:
International Atomic Energy Agency, Industrial Applications and Chemistry Section, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 2225-8833; ISBN 978-92-0-134010-8; TRN: XA12N1793099334
Availability:
Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/P1572_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 217-228
Announcement Date:
Jan 03, 2013

Citation Formats

Suwanmala, P, Hemvichian, K, and Srinuttrakul, W. Metal Adsorbent Prepared from Poly(Methyl Acrylate)-Grafted Cassava Starch via Gamma Irradiation. IAEA: N. p., 2012. Web.
Suwanmala, P, Hemvichian, K, & Srinuttrakul, W. Metal Adsorbent Prepared from Poly(Methyl Acrylate)-Grafted Cassava Starch via Gamma Irradiation. IAEA.
Suwanmala, P, Hemvichian, K, and Srinuttrakul, W. 2012. "Metal Adsorbent Prepared from Poly(Methyl Acrylate)-Grafted Cassava Starch via Gamma Irradiation." IAEA.
@misc{etde_22012233,
title = {Metal Adsorbent Prepared from Poly(Methyl Acrylate)-Grafted Cassava Starch via Gamma Irradiation}
author = {Suwanmala, P, Hemvichian, K, and Srinuttrakul, W}
abstractNote = {Metal adsorbent containing hydroxamic acid groups was successfully synthesized by radiation-induced graft copolymerization of methyl acrylate (MA) onto cassava starch. The optimum conditions for grafting were studied in terms of % degree of grafting (Dg). Conversion of the ester groups present in poly(methyl acrylate)-grafted-cassava starch copolymer into hydroxamic acid was carried out by treatment with hydroxylamine (HA) in the presence of alkaline solution. The maximum percentage conversion of the ester groups of the grafted copolymer, %Dg = 191 (7.63 mmol/g of MA), into the hydroxamic groups was 70% (5.35 mmol/g of MA) at the optimum conditions: in a mixture solution of 20% HA (w/v) and methanol solution (methanol:H{sub 2}O = 5:1) 300 mL, pH 13, reaction time 2 h, and 20 g of grafted copolymer. The adsorbent was characterized by FTIR, TGA, and DSC. The presence of electron donating groups in adsorbent containing hydroxamic acid groups gives the ability to form polycomplexes with metal ions. The ability of the adsorbent to adsorb various metals was investigated in order to evaluate the possibility of its use in metal adsorption. The adsorbent exhibited a remarkable % adsorption for Cd{sup 2+}, Al{sup 3+}, UO{sub 2} {sup 2+}, V{sup 5+} and Pb{sup 2+} at pH 3, 4, 5, 4, and 3, respectively. The adsorbent of 191%Dg had total adsorption capacities of 2.6, 1.46, 1.36, 1.15, and 1.6 mmol/g adsorbent for Cd{sup 2+}, Al{sup 3+}, UO{sub 2} {sup 2+}, V{sup 5+} and Pb{sup 2+}, respectively, in the batch mode adsorption. (author)}
place = {IAEA}
year = {2012}
month = {Sep}
}