폐감귤박으로 제조한 활성탄을 이용한 수중의 항생제 Amoxicillin의 흡착 특성

감상규; 이민규; Sang-Kyu Kam; Min-Gyu Lee

Applied Chemistry for Engineering, Vol.29, No.4, 369-375, August, 2018

DOI10.14478/ace.2018.1015 Export Citation

폐감귤박으로 제조한 활성탄을 이용한 수중의 항생제 Amoxicillin의 흡착 특성

Adsorption Characteristics of Antibiotics Amoxicillin in Aqueous Solution with Activated Carbon Prepared from Waste Citrus Peel

감상규, 이민규 ^{1, †}

제주대학교 환경공학과
¹부경대학교 화학공학과

Sang-Kyu Kam, and Min-Gyu Lee^{1, †}

Department of Environmental Engineering, Jeju National University, 102, Jejudaehak-ro, Jeju, Jeju 63243, Korea
¹Department of Chemical Engineering, Pukyong National University, 365, Sinseon-ro, Nam-gu, Busan 48547, Korea

E-mail:

초록

폐감귤박 활성탄(WCAC, waste citrus peel based activated carbon)에 의한 항생제 아목시실린(AMX)의 흡착에서 온도, 초기농도, 접촉시간 및 흡착제 투여량과 같은 운전변수의 영향을 조사하기 위해 회분식 실험을 수행하였다. 흡착 속도 및 등온 실험결과는 각각 유사 2차 속도식 및 Langmuir 등온 모델에 의해 잘 설명될 수 있었다. Langmuir 등온 모델로부터 계산된 WCAC에 의한 AMX의 최대 흡착량은 345.49 mg/g이었다. WCAC에 의한 AMX의 흡착은 흡착 과정에서 막 확산(외부 물질 전달)과 입자 내부 확산이 동시에 일어난다는 것을 보여 주었다. 흡착 속도는 WCAC의 입자 크기가 증가함에 따라 외부 물질 전달보다 입자 내부 확산에 의해 더 영향을 받았고, 입자 내부 확산이 율속 단계였다. 열역학적 파라미터는 WCAC에 의한 AMX의 흡착 반응은 흡열반응이고 자발적인 과정임을 나타내었다.

Batch experiments were conducted to investigate the effects of operating parameters such as the temperature, initial concentration, contact time and adsorbent dosage on the adsorption of antibiotics amoxicillin (AMX) by waste citrus peel based activated carbon (WCAC). The kinetics and isotherm experiment data can be well described with the pseudo-second order model and the Langmuir isotherm model, respectively. The maximum adsorption capacity of AMX by WCAC calculated from the Langmuir isotherm model was 125 mg/g. The adsorption of AMX by WCAC shows that the film diffusion (external mass transfer) and the intraparticle diffusion occur simultaneously during the adsorption process. The adsorption rate is more influenced by the intraparticle diffusion than that of the external mass transfer as the particle size of WCAC increases, and the intraparticle diffusion is the rate controlling step. The thermodynamic parameters indicated that the adsorption reaction of AMX by WCAC was an endothermic and spontaneous process.

Keywords:activated carbon;waste citrus peel;adsorption;antibiotics;amoxicillin

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[3] Pan X, Deng C, Zhang D, Wang J, Mu G, Chen Y, Aquat. Toxicol., 89, 207 (2008)

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