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Korean Chemical Engineering Research,
Vol.58, No.1, 113-121, 2020
Vol.58, No.1, 113-121, 2020
실로퓨트에 의한 Taxus chinensis 유래 7-에피-10-디아세틸파클리탁셀의 흡착에 대한 평형, 등온흡착식, 동역학 및 열역학적 특성
Equilibrium, Isotherm, Kinetic and Thermodynamic Studies for Adsorption of 7-Epi-10-deacetylpaclitaxel from Taxus chinensis on Sylopute
실로퓨트에 대한 Taxus chinensis 유래 7-에피-10-디아세틸파클리탁셀의 흡착을 회분식 실험에서 연구하였다. 흡착 평형 데이터를 Langmuir, Freundlich, Temkin 및 Dubinin-Radushkevich 등온흡착식에 적용한 결과, Langmuir 등온흡착식이 가장 높은 정확도를 나타내었다. 흡착 용량은 온도가 증가함에 따라 감소하였으며, 실로퓨트에 대한 7-에피-10-디아세틸파클리탁셀의 흡착은 적합한 물리적 공정이었다. 흡착 데이터는 유사 이차 동역학 모델과 매우 잘 일치하였으며, 경계층 확산과 입자 내 확산은 흡착 과정에 거의 영향을 미치지 않았다. 실로퓨트에 대한 7-에피-10-디아세틸파 클리탁셀 흡착 과정은 발열이며 비자발적이었다. 또한, 등량흡착열은 흡착량에 의존하지 않아 흡착제의 표면 에너지가 균일함을 알 수 있었다.
In batch experiments, the adsorption of 7-epi-10-deacetylpaclitaxel was studied using Sylopute. Experimental equilibrium data were applied to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. Among the four isotherm models tested, the Langmuir isotherm model gave the highest accuracy. The adsorption capacity was found to decrease with increases in temperature and the adsorption of 7-epi-10-deacetylpaclitaxel onto Sylopute was a favorable physical process. Adsorption kinetic data agreed very well with the pseudo-second-order kinetic model, while boundary layer diffusion and intraparticle diffusion did not play a key role in the adsorption process. The process of 7- epi-10-deacetylpaclitaxel adsorption onto Sylopute was exothermic and nonspontaneous. Also, the adsorption isosteric heat was independent of surface loading indicating an energetically homogeneous adsorbent.
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