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Issue
Korean Chemical Engineering Research,
Vol.55, No.6, 798-806, 2017
폐감귤박 활성탄을 이용한 항생제 Dimetridazole의 흡착특성
Adsorption Characteristics of Dimetridazole Antibiotics on Activated Carbon Prepared from Agricultural Waste Citrus Peel
이창한, 감상규, 이민규
제주의 농업 폐기물인 감귤박으로 제조한 활성탄(WCAC)을 수용액 중의 항생제 dimetridazole (DMZ)를 제거하기 위해 사용하였다. WCAC에 의한 DMZ의 흡착을 접촉시간, WCAC의 투여량, WCAC의 입자 크기, 온도, pH 및 DMZ 농도와 같은 다양한 조건하에서 연구하였다. DMZ의 흡착량은 온도가 증가하고 입자크기가 감소함에 따라 증가하였다. 또한, pH 4 이상에서는 DMZ의 흡착량이 거의 일정하게 유지되었지만, pH 4 이하에서는 감소하는 경향을 보였다. 흡착등온 결과를 Langmuir, Freundlich, Redlich-Peterson 및 Duinin-Radushkevich (D-R) 등온 모델식에 적용하여 검토한 결과 Redlich-Peterson 등온 모델식에 의해 가장 잘 설명되었다. 흡착속도는 유사 2차 속도 모델에 잘 적용될 수 있었으며, 입자 내확산 모델의 결과로부터 흡착 과정 동안 막 확산과 입자 내 확산이 동시에 일어나는 것을 알 수 있었다. 열역학적 파라미터는 WCAC에 대한 DMZ의 흡착반응은 흡열반응이고 자발적인 과정으로 진행된다는 것을 나타내었다. 실험결과는 WCAC가 항생제 DMZ를 제거하는데 있어서 값싸고 유용한 흡착제가 될 수 있다는 것을 보여주었다.
A activated carbon (WCAC, waste citrus activated carbon) prepared from an agricultural waste citrus peel material generated in Jeju was utilized for the removal of dimetridazole (DMZ) antibiotics in aqueous solution. The adsorption of DMZ on WCAC was investigated with the change of various parameters such as contact time, dosage of WCAC, particle size of WCAC, temperature, pH, and DMZ concentration. The DMZ adsorption capacity increased with increasing temperature and decreasing particle size. Also it was decreased at less than pH 4 but sustained almost constantly at pH 4 or greater. Isotherm parameters were determined from the Langmuir, Freundlich, Redlich-Peterson and Duinin-Radushkevich (D-R) isotherm models. The isotherm data were best described by the Redlich-Peterson isotherm model. And the adsorption kinetics can be successfully fitted to the pseudo-second-order kinetic model. The results of the intra-particle diffusion model suggested that film diffusion and intra-particle diffusion were occurred simultaneously during the adsorption process. Meanwhile, the thermodynamic parameters indicated that the adsorption reaction of DMZ on WCAC was an endothermic and spontaneous process. The experimental results showed that WCAC is a promising and cheap adsorbent for the removal of DMZ antibiotics.
Keywords: Activated carbon; Dimetridazole; Antibiotics; Adsorption; Diffusion model
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[Cited By]
  1. Jung MY, Suh SS, Korean Chemical Engineering Research, 57(3), 358, 2019
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