کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9674429 | 1453206 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of some compounds on extraction of chromium(VI) by amine extractants
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The role of some compounds on extraction of chromium(VI) by amine extractants The role of some compounds on extraction of chromium(VI) by amine extractants](/preview/png/9674429.png)
چکیده انگلیسی
The extraction of hexavalent chromium, Cr(VI), from hydrochloric acid aqueous solution using Aliquat 336 and Alamine 336 extractants was performed under different experimental conditions. The data clarify that one molecule of amine extractants shares with approximately one molecule of HCl to extract two molecules of Cr(VI) from 1M HCl aqueous solutions. The extraction is an exothermic process and possesses enthalpy change values of â41.02 and â28.08 kJ molâ1 for the extraction by Aliquat 336 and Alamine 336, respectively. The presence of potassium chloride greatly increases the extraction of Cr(VI) by amine extractants while the addition of some phenolic compounds such as phenol, dichlorophenol, o-nitrophenol and β-naphthol decreases this extraction under the same experimental conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 117, Issues 2â3, 31 January 2005, Pages 213-219
Journal: Journal of Hazardous Materials - Volume 117, Issues 2â3, 31 January 2005, Pages 213-219
نویسندگان
H.H. Someda, E.A. El-Shazly, R.R. Sheha,