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.

1. 서 론
2. 재료 및 실험 방법
    2.1 Fe-Mn 및 Fe-Mn-chitosan 합성
    2.2 인산염 제거효율 실험
    2.3 pH 영향 실험
    2.4 등온흡착 실험
    2.5 반응속도 실험
    2.6 분석 방법
3. 결과 및 고찰
    3.1 Fe-Mn과 Fe-Mn-chitosan을 이용한 인산염제거효율 비교
    3.2 pH 영향 실험
    3.3 등온흡착 실험
    3.4 반응속도 실험
4. 결 론
사 사
References

• 강서연(상명대학교 건설시스템공학과) | Seoyeon Kang (Department of Civil Engineering, Sangmyung University)
• 신정우(상명대학교 건설,환경,의생명공학과) | Jeongwoo Shin (Department of Civil, Environmental, and Biomedical Engineering, Sangmyung University)
• 안병렬(상명대학교 건설시스템공학과) | Byugnryul An (Department of Civil Engineering, Sangmyung University) Corresponding Author