کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
579612 | 1453140 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Porous CS monoliths and their adsorption ability for heavy metal ions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Highly porous chitosan (CS) monoliths were prepared by a unidirectional freeze-drying method and the adsorption performance of the monoliths for metal ions in aqueous solution was evaluated. The porous CS monoliths have excellent adsorption for a range of metal ions. The effect of the amount of porous CS monoliths, the pH, the adsorption time, the amount of the cross-linking agent, and the amount of disodium ethylenediamine tetraacetate (EDTA) on the saturated adsorption efficiency (Ade) were determined. The pH had the greatest influence on the adsorption behavior. Under optimal conditions (CCu2+=800mg/L, pH 6, and cross-linking agent = 0.15%) for the CS monoliths, the Ade for Cu2+ exceeded 99%, and the saturated adsorption capacity (Qs) reached a value of 141.8 mg/g (2.23 mmol/g) in 4 h. Moreover, the addition of EDTA can both increase the Qs and shorten the time that achieved the level. If EDTA was added, this level was achieved in 2 h. The porous CS monoliths can be regenerated by soaking them in acid and their Ade is maintained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 188, Issues 1â3, 15 April 2011, Pages 148-155
Journal: Journal of Hazardous Materials - Volume 188, Issues 1â3, 15 April 2011, Pages 148-155
نویسندگان
Fangqiang Xu, Nana Zhang, Ying Long, Youmiao Si, Yu Liu, Xue Mi, Xiaodong Wang, Fubao Xing, Xiudong You, Jianping Gao,