کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10505532 | 947066 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of novel activated carbons from H2SO4-Pretreated corncob hulls with KOH activation for quick adsorption of dye and 4-chlorophenol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
Corncob hull was immersed in 25 wt% H2SO4 and was carbonized in an oven at 290 °C for 2 h to obtain the char. The char was then activated for 1 h at 780 °C by KOH at weight ratio of KOH/char of 2.5, 3.0, and 3.5. SEM photos of the carbons revealed that the cell wall of corncob hull was etched into thin film structure. It was shown that the adsorption isotherms of methylene blue and 4-chlorophenol on the carbons were well fitted by the Langmuir equation. Moreover, the adsorption kinetics could be satisfactorily described by the Elovich equation. The normalized standard deviations are less than 2.8%. The high fraction of adsorption amount adsorbed within 1 min to that at saturation demonstrated the advantage of the prepared activated carbons. The fraction of adsorption amount within 1 min to that at saturation (q1/qmon) for the adsorption of 4-CP is high up to 0.807. Such quick adsorption behavior was mainly attributed to the presence of the thin film structure of carbons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 92, Issue 3, March 2011, Pages 708-713
Journal: Journal of Environmental Management - Volume 92, Issue 3, March 2011, Pages 708-713
نویسندگان
Feng-Chin Wu, Pin-Hsueh Wu, Ru-Ling Tseng, Ruey-Shin Juang,