열처리된 폐콘크리트를 이용한 인 제거 및 동역학적 칼럼 모델 적용 (Use of Thermally Treated Crushed Concrete for Phosphorus Removal and Application of Kinetic Column Model)

서지정보

· 발행기관 : 한국수처리학회
· 수록지 정보 : 한국수처리학회지 / 25권 / 1호 / 51 ~ 61페이지
· 저자명 : 구본운, 박성직

초록

In this study, we investigated the removal of P in aqueous solution using thermally treated crushed concrete under dynamic flow condition. Column experiments were performed in step injection mode under various conditions of influent P concentration (2.0-4.0 mg/L), flow rate (0.4–1.0 mL/min), and column length (5–15 cm). The breakthrough curves (BTCs) obtained from column experiments were fitted to Adams–Bohart, Thomas, Yoon–Nelson, and Dose-response kinetic models. The highest column capacity for P removal (q0) of 3.085 mg/g and removal percentage (Re) of 66.4% were achieved using an influent P concentration of 3.0 mg/L, flow rate of 0.4 mL/min, and column length of 10 cm. Increasing the P concentration and flow rate had a negative effect on Re, whereas the increase of column length was positively affected. Increasing flow rate and column length produced a negative effect on q0. The flow rate in the range of this study influenced on the performance of column more significantly than other two factors. Adams–Bohart model adequately fitted to the initial part of the BTCs, whereas the Thomas and Yoon–Nelson models were appropriate for describing the transient stage of the BTCs between the breakthrough point and saturation point. Theoretical q0 obtained from Thomas model and time required for 50% breakthrough of P (τ) obtained from Yoon-Nelson model were very close to experimental values. This study demonstrates the adequate performance of thermally treated crushed concrete as a filter material for the removal of P from aqueous solutions

영어초록

In this study, we investigated the removal of P in aqueous solution using thermally treated crushed concrete under dynamic flow condition. Column experiments were performed in step injection mode under various conditions of influent P concentration (2.0-4.0 mg/L), flow rate (0.4–1.0 mL/min), and column length (5–15 cm). The breakthrough curves (BTCs) obtained from column experiments were fitted to Adams–Bohart, Thomas, Yoon–Nelson, and Dose-response kinetic models. The highest column capacity for P removal (q0) of 3.085 mg/g and removal percentage (Re) of 66.4% were achieved using an influent P concentration of 3.0 mg/L, flow rate of 0.4 mL/min, and column length of 10 cm. Increasing the P concentration and flow rate had a negative effect on Re, whereas the increase of column length was positively affected. Increasing flow rate and column length produced a negative effect on q0. The flow rate in the range of this study influenced on the performance of column more significantly than other two factors. Adams–Bohart model adequately fitted to the initial part of the BTCs, whereas the Thomas and Yoon–Nelson models were appropriate for describing the transient stage of the BTCs between the breakthrough point and saturation point. Theoretical q0 obtained from Thomas model and time required for 50% breakthrough of P (τ) obtained from Yoon-Nelson model were very close to experimental values. This study demonstrates the adequate performance of thermally treated crushed concrete as a filter material for the removal of P from aqueous solutions

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