کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9674145 | 1453198 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Equilibrium biosorption isotherm for lead ion on chaff
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A new adsorbent system for removing lead ion from aqueous solutions has been investigated. This new adsorbent is cereal chaff, an agriculture product in middle-west region in China. Variables of the system include biosorption time, chaff dose and solution temperature. The experimental results were fitted to the Langmuir, Freundlich, Koble-Corrigan and Temkin model isotherms to obtain the characteristic parameters of each model. Both the Langmuir and Koble-Corrigan isotherms were found to best represent the measured biosorption data. According to the evaluation using the Langmuir equation, the maximum biosorption capacities of lead ion onto chaff was 12.5 mg gâ1 at 293 K. Using the thermodynamic equilibrium coefficients obtained at different temperatures, various thermodynamic parameters, such as ÎG0, ÎH0 and ÎS0, have been calculated. The thermodynamics of lead ion-chaff system indicates spontaneous and exothermic process. It was concluded that an increase in temperature result in a lower metal loading per unit weight of the chaff.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 125, Issues 1â3, 17 October 2005, Pages 266-271
Journal: Journal of Hazardous Materials - Volume 125, Issues 1â3, 17 October 2005, Pages 266-271
نویسندگان
Runping Han, Jinghua Zhang, Weihua Zou, Jie Shi, Hongmin Liu,