کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5357883 | 1388225 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of uranium(VI) sorption by organobentonite
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterization of uranium(VI) sorption by organobentonite Characterization of uranium(VI) sorption by organobentonite](/preview/png/5357883.png)
چکیده انگلیسی
The U(VI) sorption on the bentonite modified by hexadecyltrimethylammonium bromide (HDTMA) was studied in the concentration range: 0.0001-0.001Â mol/dm3 in the aqueous phase and in the pH range: 3-10. The experiments concerning the pH influence on the molar absorption coefficient cb of U(VI) in the bentonite phase showed that the species: UO22+, UO2(OH)+, UO2(OH)2 UO2(OH)3â, UO2(OH)42â, (UO2)3(OH)5+, (UO2)3(OH)7â, present in the aqueous phase, are responsible for uranium sorption. Their sorption parameters K were determined and it is evident that for higher concentrations of HDTMA+ cations in the bentonite phase, i.e. for b96-b157 bentonite, the presence of anionic species: UO2(OH)3â, UO2(OH)42â, and (UO2)3(OH)7â in the aqueous phase results in the increase of U(VI) molar absorption coefficient cb in the sorbent phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 17, 15 June 2010, Pages 5416-5421
Journal: Applied Surface Science - Volume 256, Issue 17, 15 June 2010, Pages 5416-5421
نویسندگان
Marek Majdan, StanisÅaw Pikus, Agnieszka Gajowiak, Agnieszka GÅadysz-PÅaska, Halina Krzyżanowska, Jerzy Å»uk, Monika Bujacka,