Competitive Growth of Sulfate-Reducing Bacteria with Bioleaching Acidophiles for Bioremediation of Heap Bioleaching Residue
| العنوان: | Competitive Growth of Sulfate-Reducing Bacteria with Bioleaching Acidophiles for Bioremediation of Heap Bioleaching Residue |
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| المؤلفون: | Renman Ruan, Heyun Sun, Yan Jia, Bingxu Dong, Yunfeng Liu, Aung Kyaw Phyo, Qiaoyi Tan |
| المصدر: | International Journal of Environmental Research and Public Health Volume 17 Issue 8 International Journal of Environmental Research and Public Health, Vol 17, Iss 2715, p 2715 (2020) |
| بيانات النشر: | MDPI, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Sulfide, Environmental remediation, Health, Toxicology and Mutagenesis, lcsh:Medicine, 010501 environmental sciences, 01 natural sciences, Article, Mining, 03 medical and health sciences, Bioremediation, bioremediation, Bioleaching, Organic matter, Sulfate-reducing bacteria, 030304 developmental biology, 0105 earth and related environmental sciences, chemistry.chemical_classification, 0303 health sciences, heap bioleaching, Bacteria, Sulfates, lcsh:R, Public Health, Environmental and Occupational Health, Acid mine drainage, Sulfide minerals, source control, Biodegradation, Environmental, chemistry, Environmental chemistry, sulfate-reducing bacteria, Iron- and sulfur-oxidizing microbes, Oxidation-Reduction, Sulfur, acid mine drainage |
| الوصف: | Mining waste rocks containing sulfide minerals naturally provide the habitat for iron- and sulfur-oxidizing microbes, and they accelerate the generation of acid mine drainage (AMD) by promoting the oxidation of sulfide minerals. Sulfate-reducing bacteria (SRB) are sometimes employed to treat the AMD solution by microbial-induced metal sulfide precipitation. It was attempted for the first time to grow SRB directly in the pyritic heap bioleaching residue to compete with the local iron- and sulfur-oxidizing microbes. The acidic SRB and iron-reducing microbes were cultured at pH 2.0 and 3.0. After it was applied to the acidic heap bioleaching residue, it showed that the elevated pH and the organic matter was important for them to compete with the local bioleaching acidophiles. The incubation with the addition of organic matter promoted the growth of SRB and iron-reducing microbes to inhibit the iron- and sulfur-oxidizing microbes, especially organic matter together with some lime. Under the growth of the SRB and iron-reducing microbes, pH increased from acidic to nearly neutral, the Eh also decreased, and the metal, precipitated together with the microbial-generated sulfide, resulted in very low Cu in the residue pore solution. These results prove the inhibition of acid mine drainage directly in situ of the pyritic waste rocks by the promotion of the growth of SRB and iron-reducing microbes to compete with local iron and sulfur-oxidizing microbes, which can be used for the source control of AMD from the sulfidic waste rocks and the final remediation. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1660-4601 1661-7827 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50b24a3b63d989d955cd175200dbea4e http://europepmc.org/articles/PMC7215573 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....50b24a3b63d989d955cd175200dbea4e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16604601 16617827 |
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