کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6309936 | 1618876 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transmetallation of Gd-DTPA by Fe3+, Cu2+ and Zn2+ in water: Batch experiments and coagulation-flocculation simulations
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The study investigates the stability of gadolinium-DTPA complex in presence of competing metallic ions, Fe3+, Cu2+ and Zn2+ using batch experiments and coagulation-flocculation simulations. High performance liquid chromatography with fluorescence detection was used for simultaneous analysis of chelate gadolinium (Gd-DTPA) and free Gd(III) ion in water. It was shown that Cu2+ has a strong affinity for DTPA and could lead to a complete release of Gd3+. Fe3+ appeared also to compete strongly with Gd3+ for DTPA binding since up to 80% of Gd-complex was dissociated under iron excess condition. Finally, zinc had a lower influence on Gd speciation: only 15% of Gd3+ was released with addition of a 5-fold excess of Zn2+. During coagulation-flocculation simulation, Fe3+ was able to displace about 27% of Gd-DTPA, and no adsorption was observed onto flocs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 95, January 2014, Pages 639-642
Journal: Chemosphere - Volume 95, January 2014, Pages 639-642
نویسندگان
Marion Rabiet, Marine Letouzet, Sepideh Hassanzadeh, Stéphane Simon,