کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6592885 | 1423364 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of activated carbon from spent tea leaves for aspirin removal
ترجمه فارسی عنوان
سنتز کربن فعال از برگ چای مصرف شده برای حذف آسپرین
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کلمات کلیدی
کربن فعال، برگ چای مصرف شده، آسپرین جذب، سینتیک، ایزوترم
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Adsorption capacity of activated carbon prepared from spent tea leaves (STL-AC) for the removal of aspirin from aqueous solution was investigated in this study. Preliminary studies have shown that treatment with phosphoric acid (H3PO4) increased removal efficiency of STL-AC. Characterizations on STL-AC revealed excellent textural properties (1200 m2·gâ 1, 51% mesoporosity), as well as distinctive surface chemistry (1.08 mmol·gâ 1 and 0.54 mmol·gâ 1 for acidic and basic oxygenated groups, pHpzc = 2.02). Maximum removal efficiency of aspirin observed was 94.28% after 60 min when the initial concentration was 100 mg·Lâ 1, 0.5 g of adsorbent used, pH 3 and at a temperature of 30 °C. The adsorption data were well fitted to the Freundlich isotherm model and obeyed the pseudo-second order kinetics model. The adsorption of aspirin onto STL-AC was exothermic in nature (ÎHÏ´Â = â 13.808 kJ·molâ 1) and had a negative entropy change, ÎSÏ´ (â 41.444 J·molâ 1). A negative Gibbs free energy, ÎGÏ´ was obtained indicating feasibility and spontaneity of the adsorption process. The adsorption capacity of AC-STL (178.57 mg·gâ 1) is considerably high compared to most adsorbents synthesized from various sources, due to the well-defined textural properties coupled with surface chemistry of STL-AC which favors aspirin adsorption. The results demonstrate the potential of STL-AC as aspirin adsorbent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Chemical Engineering - Volume 26, Issue 5, May 2018, Pages 1003-1011
Journal: Chinese Journal of Chemical Engineering - Volume 26, Issue 5, May 2018, Pages 1003-1011
نویسندگان
Syieluing Wong, Yowjeng Lee, Norzita Ngadi, Ibrahim Mohammed Inuwa, Nurul Balqis Mohamed,