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In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal
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  • 英文篇名:In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal
  • 作者:Bojana ; Nedi? ; Vasiljevi? ; Milena ; Obradovi? ; Danica ; Bajuk-Bogdanovi? ; Maja ; Milojevi?-Raki? ; Zoran ; Jovanovi? ; Nemanja ; Gavrilov ; Ivanka ; Holclajtner-Antunovi?
  • 英文作者:Bojana Nedi? Vasiljevi?;Milena Obradovi?;Danica Bajuk-Bogdanovi?;Maja Milojevi?-Raki?;Zoran Jovanovi?;Nemanja Gavrilov;Ivanka Holclajtner-Antunovi?;Faculty of Physical Chemistry, University of Belgrade;Laboratory of Physics, Vin?a Institute of Nuclear Sciences, University of Belgrade;
  • 英文关键词:Composite materials;;Chemical synthesis;;Kinetics;;Adsorption;;Ultrasonics
  • 中文刊名:HJKB
  • 英文刊名:环境科学学报(英文版)
  • 机构:Faculty of Physical Chemistry, University of Belgrade;Laboratory of Physics, Vin?a Institute of Nuclear Sciences, University of Belgrade;
  • 出版日期:2019-04-29
  • 出版单位:Journal of Environmental Sciences
  • 年:2019
  • 期:v.81
  • 基金:supported by the Ministry of Education,Science and Technological Development of the Republic of Serbia(Nos.OI172018,OI172043 and III45006)
  • 语种:英文;
  • 页:HJKB201907013
  • 页数:12
  • CN:07
  • ISSN:11-2629/X
  • 分类号:138-149
摘要
Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength.Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.
        Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength.Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.
引文
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