Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Enhancement of phosphate removal using stabilized Fe-Mn particle

Fe-Mn 입자의 안정화를 통한 인산염 효율 향상

  • Seoyeon Kang (Department of Civil Engineering, Sangmyung University) ;
  • Jeongwoo Shin (Department of Civil, Environmental, and Biomedical Engineering, Sangmyung University) ;
  • Byugnryul An (Department of Civil Engineering, Sangmyung University)
  • 강서연 (상명대학교 건설시스템공학과) ;
  • 신정우 (상명대학교 건설.환경.의생명공학과) ;
  • 안병렬 (상명대학교 건설시스템공학과)
  • Received : 2023.11.06
  • Accepted : 2023.12.05
  • Published : 2023.12.15
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Abstract

The binary oxide adsorbent using Fe and Mn (Fe-Mn) has been prepared by precipitation method to enhance the removal of phosphate. Different amounts of chitosan, a natural organic polymer, were used during preparation of Fe-Mn as a stabilizer to protect an aggregation of Fe-Mn particles. The optimal amount of chitosan has been determined considering the separation of the Fe-Mn particles by gravity from solution and highest removal efficiency of phosphate (Fe-Mn10). The application of Fe-Mn10 increased removal efficiency at least 15% compared to bare Fe-Mn. According to the Langmuir isotherm model, the maximum uptake (qm) and affinity coefficient (b) were calculated to be 184 and 240 mg/g, and 4.28 and 7.30 L/mg for Fe-Mn and Fe-Mn10, respectively, indicating 30% and 70% increase. The effect of pH showed that the removal efficiency of phosphate was decrease with increase of pH regardless of type of adsorbent. The enhanced removal efficiency for Fe-Mn10 was maintained in entire range of pH. In the kinetics, both adsorbents obtained 70% removal efficiency within 5 min and 90% removal efficiency was achieved at 1 h. Pseudo second order (PSO) kinetic model showed higher correlation of determination (R2), suggesting chemisorption was the primary phosphate adsorption for both Fe-Mn and Fe-Mn10.

Keywords

Acknowledgement

본 연구는 2022 년 상명대학교 교내연구비를 지원 받아 수행하였음.

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