کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
640976 | 1456983 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bioleaching of high grade Zn-Pb bearing ore by mixed moderate thermophilic microorganisms
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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: Bioleaching of high grade Zn-Pb bearing ore by mixed moderate thermophilic microorganisms Bioleaching of high grade Zn-Pb bearing ore by mixed moderate thermophilic microorganisms](/preview/png/640976.png)
چکیده انگلیسی
In this research, the bioleaching mechanism of zinc and lead from high-grade Zn-Pb ore has been investigated. It is done by using mixed culture of iron and sulfur oxidizing moderate thermophilic bacteria at 45 °C. Pulp density, initial pH and ferrous concentration were studied as influential parameters in bioleaching experiments. The optimum conditions were achieved at pulp density = 50 (g/L), initial pH = 1 and FeSO4.7H2O concentration = 75 (g/L) with 98.5% zinc recovery after 25 days treatment. Generally, an increase in ferrous concentration caused an improve zinc recovery, and an increase in initial pH and pulp density caused reduction in zinc recovery. However, in the test with optimum condition the lead dissolution was just 0.027% due to the lower Pb solubility. Furthermore, cadmium dissolution was 98% under optimum condition and results showed the cadmium dissolution was in direct proportion with zinc dissolution. Finally, 7.82% of arsenic and 8.52% of antimony dissolved during zinc bioleaching after 25 days treatment, both under above mentioned optimum condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 136, 5 November 2014, Pages 241-249
Journal: Separation and Purification Technology - Volume 136, 5 November 2014, Pages 241-249
نویسندگان
Sina Ghassa, Zohreh Boruomand, Hadi Abdollahi, Marzie Moradian, Ata Akcil,