کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1630752 1516683 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficacy of chalcopyrite bioleaching using a pure and a mixed bacterium
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Efficacy of chalcopyrite bioleaching using a pure and a mixed bacterium
چکیده انگلیسی
To determine the efficacy of chalcopyrite bioleaching using pure cultures of Thiobacillus ferrooxidans or Thiobacillus thiooxidans and a mixed culture composed of Thiobacillus ferrooxidans and Thiobacillus thiooxidans, experiments were carried out in shake flasks with [Fe2+] 4 g·L−1 and S 1 g·L−1 at pH=1.80, 130 r/min and 30°C. The tests showed that the copper extraction in a mixed culture composed of Thiobacillus ferrooxidans and Thiobacillus thiooxidans is higher than that in a pure culture. On the other hand, an important potential of Thiobacillus thiooxidans to leaching chalcopyrite was indicated. Thiobacillus thiooxidans can prevent jarosites accumulating on the substrate and allow further copper to dissolute through the action of ferric ion. The selection of the suitable pH in a leaching solution would be significant. Thiobacillus thiooxidans and Thiobacillus ferrooxidans play an important role in the bioleaching process. Finally, the mechanism and the reason for iron precipitation were also discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material - Volume 13, Issue 1, February 2006, Pages 7-10
نویسندگان
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