Adsorption of Th4+ from aqueous solution onto Poly(N,N-diethylacrylamide-co-acrylic acid) microgels

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• 作者：Hu Peizhuo (1)
  Liu Tonghuan (1)
  Zhou Gen (2)
  Duan Xiaojiang (1)
  Wu Wangsuo (1)
  
• 关键词：Poly(N ; N ; diethylacrylamide ; co ; acrylicacid) ; Microgels ; Adsorption ; Th4+
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：301
• 期：1
• 页码：65-73
• 全文大小：
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• 作者单位：Hu Peizhuo (1)
  Liu Tonghuan (1)
  Zhou Gen (2)
  Duan Xiaojiang (1)
  Wu Wangsuo (1)
  
  1. Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
  2. School of Physics Science and Technology, Lanzhou University, Lanzhou, 730000, China
  
• ISSN：1588-2780

文摘

Poly(N,N-diethylacrylamide-co-acrylicacid) (P(DEA-co-AA)) was synthesized by Free-Radical polymerization. The effects of contact time, solid/liquid ratio, pH value, and initial concentration on the adsorption of Th4+ ions onto P(DEA-co-AA) were investigated. The adsorption was highly dependent on the initial pH and initial metal ions concentration of the solvent. The adsorption kinetic data indicated that the chemical adsorption is a swiftness processes, the adsorption equilibrium could be achieved within 20?min. The adsorption isotherm of the microgels for Th4+ is fitted to the Langmuir isotherm model. Gibbs free enthalpy change was ?em class="a-plus-plus">G?<?0 indicating that the adsorption process was spontaneous. The enthalpy and entropy changes of the process of the adsorbents for Th4+ were greater than zero showing that the overall process was endothermic. After five times of repeated tests for the P(DEA-co-AA) microgels it still remained its excellent adsorption.