کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9632517 | 462106 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Gold recovery from chloride solutions with XAD-7: Competitive adsorption of Fe(III) and Te(IV)
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Gold recovery from chloride solutions with XAD-7: Competitive adsorption of Fe(III) and Te(IV) Gold recovery from chloride solutions with XAD-7: Competitive adsorption of Fe(III) and Te(IV)](/preview/png/9632517.png)
چکیده انگلیسی
Adsorption of gold and iron can be explained satisfactorily by taking into account the formation equilibria of the tetrachloro complexes and the difference in their acid strengths. The uptake of the weakly acidic HAuCl4 depends only slightly on the HCl concentration and adsorption was substantially stronger in NaCl solutions. The opposite trends observed for iron were due to the lower stability and higher degree of dissociation of HFeCl4. The adsorbable complex of Te(IV), HTe(OH)Cl4, has lower affinity for the adsorbent, but at high concentrations it can reduce substantially the adsorption capacity for Au(III) and Fe(III). This effect was confirmed with the adsorption column runs, and the change in the break-through behavior of Au(III) and Fe(III) can be explained quantitatively by the simulation model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 79, Issues 3â4, October 2005, Pages 154-171
Journal: Hydrometallurgy - Volume 79, Issues 3â4, October 2005, Pages 154-171
نویسندگان
Markku Laatikainen, Erkki Paatero,