Impact of environmental conditions on sorption of 210Pb(II) to NKF-5 zeolite

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• 作者：1. School of Materials and Chemical Engineering ; Anhui University of Architecture ; Hefei ; 230601 Anhui ; People’s Republic of China2. Key Laboratory of Novel Thin Film Solar Cells ; Institute of Plasma Physics ; Chinese Academy of Sciences ; P.O. Box 1126 ; Hefei ; 230031 People’s Republic of China3. Radiochemistry Laboratory ; Lanzhou University ; Lanzhou ; 730000 People’s Republic of China
• 关键词：Pb(II) – NKF ; 5 zeolite – pH – Humic substances – Ionic strength
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：289
• 期：3
• 页码：671-678
• 全文大小：448.5 KB
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• 作者单位：http://www.springerlink.com/content/2vt3157l4841384g/
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nuclear Chemistry
  Physical Chemistry
  Nuclear Physics, Heavy Ions and Hadrons
  Diagnostic Radiology
  Inorganic Chemistry
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1588-2780

文摘

The sorption of Pb(II) from aqueous solution using NKF-5 zeolite was investigated by batch technique under ambient conditions. The NKF-5 zeolite sample was characterized by using FTIR and X-ray powder diffraction in detail. The sorption of Pb(II) was investigated as a function of pH, ionic strength, foreign ions, and humic substances. The results indicated that the sorption of Pb(II) on NKF-5 zeolite was strongly dependent on pH. The sorption was dependent on ionic strength at low pH, but independent of ionic strength at high pH. At low pH, the sorption of Pb(II) was dominated by outer-sphere surface complexation and ion exchange with H+ on NKF-5 zeolite surfaces, whereas inner-sphere surface complexation was the main sorption mechanism at high pH. From the experimental results, one can conclude that NKF-5 zeolite has good potentialities for cost-effective preconcentration of Pb(II) from large volumes of aqueous solutions.