کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
642748 | 884335 | 2010 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Zn–Ni sulfide selective precipitation: The role of supersaturation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Zn–Ni sulfide selective precipitation: The role of supersaturation Zn–Ni sulfide selective precipitation: The role of supersaturation](/preview/png/642748.png)
چکیده انگلیسی
The selective removal of Zn with Na2S from a mixture of Zn and Ni was studied in a continuously stirred tank reactor. At pH 5 and pS 18 the selectivity was improved from 61% to 99% by reducing the supersaturation at the dosing points by means of the reduction of the influent concentrations. The particle size distribution (PSD) of the precipitates increased as the supersaturation decreased up to a mode of about 22 μm at pH 5. PSD values on the 100–200 μm range were obtained when the sulfide was dosed through a polytetrafluoroethylene (Teflon) membrane at low supersaturation. Zn precipitated as sphalerite, whereas Ni mainly formed amorphous particles with a pH dependent stoichiometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 74, Issue 1, 30 July 2010, Pages 108–118
Journal: Separation and Purification Technology - Volume 74, Issue 1, 30 July 2010, Pages 108–118
نویسندگان
R.M.M. Sampaio, R.A. Timmers, N. Kocks, V. André, M.T. Duarte, E.D. van Hullebusch, F. Farges, P.N.L. Lens,