کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212995 462076 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sulfur speciation on the surface of chalcopyrite leached by Acidianus manzaensis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Sulfur speciation on the surface of chalcopyrite leached by Acidianus manzaensis
چکیده انگلیسی

Sulfur speciation on the surface of chalcopyrite leached by extremely thermophilic Acidianus manzaensis was investigated by employing scanning electron microscopy (SEM), X-ray diffraction (XRD) and sulfur K-edge X-ray absorption near edge structure spectroscopy (XANES). SEM micrographs showed that the cells were attached to the surface of chalcopyrite and the mineral surface was covered with many floccules after 20-day bioleaching. XRD spectra indicated that the leach residue was mainly composed of chalcopyrite and jarosite, whilst the sulfur K-edge spectra indicated that the jarosite might be the main component of the passivation layer of the chalcopyrite leached by A. manzaensis. The results of spectral graphic analysis suggested that covellite was the intermediate sulfur compound during bioleaching of chalcopyrite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 99, Issues 1–2, October 2009, Pages 45–50
نویسندگان
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