کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
627965 | 1455473 | 2007 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption of methylene blue by acid and heat treated diatomaceous silica
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Adsorption of methylene blue by acid and heat treated diatomaceous silica Adsorption of methylene blue by acid and heat treated diatomaceous silica](/preview/png/627965.png)
چکیده انگلیسی
Diatomite, an abundant inorganic material in Jordan, was treated with sulfuric acid and heat treated in order to improve its performance as an adsorbent. The acid treated diatomite (ATD) was used to adsorb methylene blue from aqueous solutions. The equilibrium data were fitted to different adsorption isotherms and the best fit was obtained using Langmuir isotherm with R2 value of about unity. The maximum loading capacity, Qmax was found 126.6 mg/g at 30EC and increases slightly as the temperature increases. The kinetics data were best described by the pseudosecond order model with a value of the model constant k2 of 1.056 (g/mg h) at 30EC and an initial dye concentration of 50 mg/l. The thermodynamic parameters such as the standard enthalpy (ÎH0), standard entropy (ÎS0) and standard free energy (ÎG0) were evaluated. The obtained results indicated the adsorption of basic dyes onto ATD is endothermic and spontaneous process and confirmed the applicability of this modified inorganic material as an efficient adsorbent for basic dyes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 217, Issues 1â3, 5 November 2007, Pages 212-224
Journal: Desalination - Volume 217, Issues 1â3, 5 November 2007, Pages 212-224
نویسندگان
Z. Al-Qodah, W.K. Lafi, Z. Al-Anber, M. Al-Shannag, A. Harahsheh,