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Feasibility of using calcined patinopecten yessoensis shells for fluoride removal and investigation of the fluoride removal mechanismoa mark
  • Choi, Moon Yeong ;
  • Lee, Jae In ;
  • Lee, Chang Gu ;
  • Park, Seong Jik
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Publication Year
2021-09-01
Journal
Desalination and Water Treatment
Publisher
Desalination Publications
Citation
Desalination and Water Treatment, Vol.233, pp.292-302
Keyword
Adsorption mechanismFluoride removalPatinopecten yessoensis shellsScallop shellThermal treatment
All Science Classification Codes (ASJC)
Water Science and TechnologyOcean EngineeringPollution
Abstract
This study assessed the applicability of seafood waste, Patinopecten yessoensis shells (PY), for fluoride removal. PY was modified by calcination to improve its fluoride removal capacity, and 800°C was the optimum calcination temperature its modification as a fluoride adsorbent. Fluoride adsorption by PY-800 was confirmed due to the formation of fluorite (CaF2) through X-ray diffraction analysis. The fluorine adsorption to PY-800 reached equilibrium within 2 h at an initial fluoride concentration of 50 mg/L, and a reaction time of 36 h was required to reach equilibrium at 200 mg/L. Both the pseudo-first-order and pseudo-second-order models described the kinetic adsorption data well. In isotherm studies, the fluoride adsorption of PY-800 was best suited to the Langmuir model. The enthalpy change of fluoride adsorption was 45.49 kJ/mol, ranging in the boundary between physical and chemical adsorption. Fluoride adsorption decreased from 113.13 to 86.01 mg/g as the pH increased from 3 to 11. Anions in the solution inhibited fluoride adsorption, and impacted other ions in the following order: chloride < sulfate < carbonate < phosphate. PY-800 has a higher adsorption capacity than other reported adsorbents, with a maximum of 159.62 mg/g. These results show that PY-800 recycled from food waste is highly efficient for fluoride removal.
ISSN
1944-3986
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/32313
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85116988178&origin=inward
DOI
https://doi.org/2-s2.0-85116988178
Journal URL
http://www.deswater.com/openaccess.php
Type
Article
Funding
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1008982).
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Lee, Chang-Gu 이창구
Department of Environmental and Safety Engineering
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