کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9632564 | 462121 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sorption of precious metals onto chemically prepared carbon from flax shive
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The sorption of gold, silver, palladium and platinum chlorides onto a carbonaceous sorbent prepared from flax shive by treatment with hot sulfuric acid is described. The results showed that the rate of sorption followed a first-order relationship with the initial rate described largely by pore diffusion. The sorption of the metal ions followed the Langmuir equation with the calculated monolayer capacities following the order: Au(III)>Pd(II)>Ag(I)>Pt(II)âPt(IV). The sorption process was shown to occur by ion exchange reactions with functional groups on the sorbent. Once the metal ions had been loaded onto the sorbent, they were, except for platinum(IV), reduced by the sorbent to the metal with oxidation of the sorbent generating further ion exchange sites for sorption of the metal ions. This allowed the possibility of recycling the sorbent until significant amounts of the precious metal had been accumulated, thus simplifying the recovery of the metal by combustion of the residual sorbent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 78, Issues 1â2, July 2005, Pages 137-144
Journal: Hydrometallurgy - Volume 78, Issues 1â2, July 2005, Pages 137-144
نویسندگان
M. Cox, A.A. Pichugin, E.I. El-Shafey, Q. Appleton,