کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580063 | 1453148 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sorption behavior of fluoride ions from aqueous solutions by hydroxyapatite
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
The effects of pH, contact time, fluoride-ion concentration, and the dose of sorbent on the sorption of fluoride ions by hydroxyapatite were studied. Equilibrium was reached in 16Â h of contact time and the maximum sorption of fluoride ions was in the pHeq range between 5 and 7.3. The highest efficiency in the sorption system was determined by using 0.01Â g of hydroxyapatite and 25Â mL of solution. The pseudo-second order model described the kinetic sorption processes, and the Freundlich model, the sorption isotherm process. These results indicated that the mechanism was chemisorption on a heterogeneous material. Fluoride ions were partially desorbed using an alkaline solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 180, Issues 1â3, 15 August 2010, Pages 297-302
Journal: Journal of Hazardous Materials - Volume 180, Issues 1â3, 15 August 2010, Pages 297-302
نویسندگان
M. Jiménez-Reyes, M. Solache-RÃos,