کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
583902 | 877879 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The adsorption of cationic dye from aqueous solution onto acid-activated andesite
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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: The adsorption of cationic dye from aqueous solution onto acid-activated andesite The adsorption of cationic dye from aqueous solution onto acid-activated andesite](/preview/png/583902.png)
چکیده انگلیسی
The adsorption of cationic dye (i.e., methylene blue) onto acid-activated andesite in aqueous solution was studied in a batch system with respect to its kinetics as a function of agitation speed, initial adsorbate concentration, pH, and adsorbent mass. It was found that the resulting acid-activated adsorbent possessed a mesoporous structure with BET surface areas at around 60Â m2/g. The surface characterization of acid-activated andesite was also performed using the zeta-potential measurements, indicating that the charge sign on the surface of the andesite should be negative in a wide pH range (i.e., 3-11). Furthermore, a simplified kinetic model, pseudo-second-order, was tested to investigate the adsorption behaviors of methylene blue onto the clay samples treated under different process conditions. It was found that the adsorption process could be well described with the model. The adsorption capacity parameter of the model obtained in the present work was significantly in line with the process parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 147, Issue 3, 25 August 2007, Pages 1056-1062
Journal: Journal of Hazardous Materials - Volume 147, Issue 3, 25 August 2007, Pages 1056-1062
نویسندگان
Wen-Tien Tsai, Hsin-Chieh Hsu, Ting-Yi Su, Keng-Yu Lin, Chien-Ming Lin, Tzong-Hung Dai,