Preparation of metal adsorbent from poly(methyl acrylate)-grafted-cassava starch via gamma irradiation |
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| Authors: | Phiriyatorn Suwanmala Kasinee Hemvichian Hiroyuki Hoshina Wannee Srinuttrakul Noriaki Seko |
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| Affiliation: | 1. Thailand Institute of Nuclear Technology (TINT), 9/9 Moo 7, Saimoon, Ongkharak, Nakorn Nayok 26120, Thailand;2. Japan Atomic Energy Agency (JAEA), Quantum Beam Science Directorate, 1233 Watanuki, Takasai, Gunma 370-1292, Japan;1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;2. Key Lab of Oil & Gas Production, China National Petroleum Corporation, Beijing 100083, China;1. National Special Superfine Powder Engineering Research Center, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2. High School Affiliated To Nanjing Normal University, Nanjing 210094, China;1. Institute of Physics, University of Tartu, W. Ostwaldi Str. 1, Tartu, Estonia;2. Department of Physics, University of Helsinki, P.O. Box 43, Finland;1. MOE Key Laboratory of Petroleum Engineering, and State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;2. Chongqing University of Science & Technology, Chongqing 401331, China;3. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China |
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| 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 condition. 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 Cd2+, Al3+, UO22+, V5+ and Pb2+, respectively, in the batch mode adsorption. |
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