کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
583668 | 1453177 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Silica gel functionalized with 4-phenylacetophynone 4-aminobenzoylhydrazone: Synthesis of a new chelating matrix and its application as metal ion collector
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Thermodynamic parameters such as the standard free energy change (ÎG)°, enthalpy change (ÎH°) and entrophy change (ÎS°) were calculated to determine the nature of sorption process. From these parameters, ÎH° were found to be endothermic values: 38.39, 18.0, and 14.7 kJ molâ1 for the same sequence of divalent cations and ÎS° values were calculated to be positive for the sorption of each metal ion onto the modified silica gel. Negative ÎG° values indicated that sorption process for all metal ions were spontaneous in nature although they presented an endothermic enthalpy for the interaction, resulting in an entropically favoured process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 150, Issue 3, 11 February 2008, Pages 546-553
Journal: Journal of Hazardous Materials - Volume 150, Issue 3, 11 February 2008, Pages 546-553
نویسندگان
I. Hatay, R. Gup, M. Ersöz,