کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9674240 | 1453201 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Copper leaching from a sandy soil: Mechanism and parameters affecting EDTA extraction
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Copper leaching from a sandy soil: Mechanism and parameters affecting EDTA extraction Copper leaching from a sandy soil: Mechanism and parameters affecting EDTA extraction](/preview/png/9674240.png)
چکیده انگلیسی
A series of 24Â h batch tests of copper extraction from a sandy soil were performed by washing the soil with aqueous solution of ethylenediaminetetraacetic acid, EDTA. EDTA versus copper molar ratio were in the range between 1 (equimolar tests) and 13.3. The tests were performed at three selected liquid/solid ratio, 5, 12.5 and 25. Results show that decreasing the pH of the washing solution an higher copper extraction yield was achieved: an almost complete copper extraction was achieved after 23Â h of mixing at a L/SÂ =Â 5, and after 5Â h of mixing at an L/SÂ =Â 12.5. The mechanism of copper extraction was found to involve two sequential processes: the former dissolution of metal salts, that lead to an initial high concentration of both copper and some competitive cations (essentially Ca2+), and the following EDTA exchange reaction between calcium and copper complexes, which corresponded an increase of pH in the washing solution. A negligible extraction of Fe3+ was also observed at the investigated operative conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 122, Issues 1â2, 30 June 2005, Pages 85-90
Journal: Journal of Hazardous Materials - Volume 122, Issues 1â2, 30 June 2005, Pages 85-90
نویسندگان
L. Di Palma, P. Ferrantelli,