کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582246 | 1453163 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of lead ions by Unye (Turkey) bentonite in iron and magnesium oxide-coated forms
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
This paper presents the adsorption of Pb(II) from aqueous solution onto Unye (Turkey) bentonite in raw (RB), iron oxide-coated (ICB) and magnesium oxide-coated (MCB) forms. Adsorption of Pb(II) by samples was investigated as a function of the initial Pb(II) concentration, solution pH, ionic strength, temperature and inorganic ligand effect (Clâ). Changes in the surface and structure were characterized by means of XRD and N2 gas adsorption data. The Langmuir monolayer adsorption capacities of RB, ICB and MCB in 0.1Â M KNO3 solution were estimated as 16.70, 22.20 and 31.86Â mg/g, respectively. The spontaneity of the adsorption process is established by decrease in ÎG which varied from â21.60 to â28.60Â kJ/mol (RB), â21.74 to â32.22Â kJ/mol (ICB) and â26.27 to â33.11 (MCB) in temperature range 303-338Â K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 165, Issues 1â3, 15 June 2009, Pages 63-70
Journal: Journal of Hazardous Materials - Volume 165, Issues 1â3, 15 June 2009, Pages 63-70
نویسندگان
Erdal Eren,