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In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal

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2019
Authors
Vasiljević-Nedić, Bojana
Obradović, Milena
Bajuk-Bogdanović, Danica V.
Milojević-Rakić, Maja
Jovanović, Zoran M.
Gavrilov, Nemanja M.
Holclajtner-Antunović, Ivanka D.
Article (Published version)
,
© 2019
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Abstract
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 de...sorption 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. © 2019

Keywords:
Composite materials / Chemical synthesis / Kinetics / Adsorption / Ultrasonics
Source:
Journal of Environmental Sciences, 2019, 81, 136-147
Projects:
  • Oxide-based environmentally-friendly porous materials for genotoxic substances removal (RS-172018)
  • Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications (RS-172043)
  • Physics and Chemistry with Ion Beams (RS-45006)

DOI: 10.1016/j.jes.2019.01.018

ISSN: 1001-0742; 1878-7320

PubMed: 30975316

WoS: 000465122900013

Scopus: 2-s2.0-85061774710
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URI
https://linkinghub.elsevier.com/retrieve/pii/S1001074218314682
http://vinar.vin.bg.ac.rs/handle/123456789/8217
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