Adsorption of Ag(I) on glycidyl methacrylate/N,N′-methylene bis-acrylamide chelating resins with embedded iron oxide

被引:102
作者
Donia, AM [1 ]
Atia, AA [1 ]
El-Boraey, HA [1 ]
Mabrouk, DH [1 ]
机构
[1] Menoufia Univ, Fac Sci, Dept Chem, Menoufia, Egypt
关键词
chelating resins; adsorption; silver; kinetics; thermodynamics;
D O I
10.1016/j.seppur.2005.07.034
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Glycidyl methacrylate/N,N'-methylene bis-acrylamide (GMA/MBA) resins modified by embedded iron oxide (Fe2O3) were prepared. Amino and thiol functionalities were immobilized on the obtained resins. The uptake of Ag(l) by the resins using batch and column techniques was investigated. The oxide-containing resins showed higher uptake values relative to the corresponding oxide-free ones. The uptake of Ag(l) on the resins vias found to follow pseudo second-order kinetics. The uptake process was investigated at different temperatures and Delta H degrees, Delta S degrees and Delta G degrees were calculated. Regeneration of the resins was achieved using thiourea, HNO3 and acidified thiourea with HNO3. Regeneration efficiency was found to be 98% over five cycles with no appreciable change in durability. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:281 / 287
页数:7
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