کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9674209 | 1453200 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Equilibrium, kinetic and thermodynamic studies on the adsorption of phenol onto chitin
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Equilibrium, kinetic and thermodynamic studies on the adsorption of phenol onto chitin Equilibrium, kinetic and thermodynamic studies on the adsorption of phenol onto chitin](/preview/png/9674209.png)
چکیده انگلیسی
The adsorption of phenol onto chitin, a naturally occurring material was studied as a function of initial pH, temperature and initial phenol concentration. The highest phenol adsorption capacity was determined as 21.5 mg gâ1 for 300 mg dmâ3 initial phenol concentration at pH 1.0 and 40 °C. Adsorption data were well described by the Freundlich Model, although they could be modeled by the Langmuir equation. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data. The pseudo-second-order kinetic model provided the best correlation of the experimental data compared to the pseudo-first-order model. The thermodynamic constants of the adsorption process; ÎG°, ÎH° and ÎS° were evaluated as -19.4 kJ molâ1 (at 40 °C), 10.2 kJ molâ1 and 0.093 kJ molâ1 Kâ1, respectively. These showed that adsorption of phenol on chitin was endothermic and spontaneous.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 123, Issues 1â3, 31 August 2005, Pages 151-157
Journal: Journal of Hazardous Materials - Volume 123, Issues 1â3, 31 August 2005, Pages 151-157
نویسندگان
Arzu Y. Dursun, Ã. Seda Kalayci,