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首页> 外文会议>Iron ore 2011 >Bio-Benefi ciation of Australian Iron Ores – Potential Applications of Indigenous Bacteria for Flotation, Flocculation and Phosphorous Removal
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Bio-Benefi ciation of Australian Iron Ores – Potential Applications of Indigenous Bacteria for Flotation, Flocculation and Phosphorous Removal

机译：澳大利亚铁矿石的生物选矿–土著细菌在浮选，絮凝和除磷方面的潜在应用

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Iron ore currently mined in Australia generally requires very little benefi ciation. However, depletingrnhigh-grade resources means that in the future low-grade iron ore deposits will need to be minedrnto meet the increasing demands of the global steel industry. Along with the increased demand,rnthe industry faces additional pressure to reduce the environmental impact of mining and mineralrnprocessing. This has stimulated research beyond incremental improvements to conventionalrnprocessing into alternative low-impact processes, including biotechnological approaches tornmineral processing.rnBiofl otation and biofl occulation have emerged as relatively recent technologies, in whichrnbacteria and/or their extracellular material may be used as fl otation reagents (collectors orrnmodifi ers), enabling improved selective separation of minerals. The primary advantage is thernproduction of a selective, environmentally-benign alternative to conventional fl otation reagents.rnA biotechnological approach may also be taken in the benefi ciation of high-phosphorous iron oresrnutilising bacteria capable of iron reduction and phosphorous solubilisation.rnSamples from three iron ore deposits in Western Australia were examined for bacteria suitablernfor iron ore benefi ciation. A number of common soil microorganisms including Pseudomonasrnspp, Limnobacter thiooxidans, Paenibacillus spp, and Ralstonia insidiosa were identifi ed usingrnculture-independent molecular techniques. A number of anaerobic species belonging to the genusrnClostridium were also identifi ed in the core samples. Selected aerobic species were enriched andrnisolated on high nutrient media in the presence of haematite. Several of the isolated strains showedrnan affi nity for iron ore, attaching to haematite in enrichment cultures and further demonstratedrnthrough adhesion studies. Other isolated species such as Ralstonia isidiosa and Pseudomonasrnstutzeri are known to solubilise rock phosphates in soils and have potential for the removal ofrnphosphorous from Australian iron ores.
机译：目前在澳大利亚开采的铁矿石通常需要很少的选矿。但是，耗尽高品位资源意味着将来需要开采低品位铁矿石以满足全球钢铁行业不断增长的需求。随着需求的增加，该行业面临着减轻采矿和矿物加工对环境影响的额外压力。这不仅推动了对常规加工的逐步改进，还发展出了替代性的低影响工艺，包括矿物加工的生物技术方法。生物吸附和生物絮凝是相对较新的技术，其中细菌和/或它们的细胞外物质可以用作漂浮试剂（捕集剂（orrnmodifis），可以改善矿物的选择性分离。主要优点是可以生产出一种替代传统浮选试剂的，对环境无害的替代品。在高磷铁矿石的选矿中，也可以采用生物技术方法，利用能够还原铁和溶解磷的细菌。来自三种铁矿石的样品检查了西澳大利亚州的矿床中适合铁矿石选矿的细菌。使用与培养无关的分子技术鉴定了许多常见的土壤微生物，包括假单胞菌，氧化硫杆菌，Paenibacillus spp和Insidiosa。核心样品中还鉴定出了属于梭菌属的许多厌氧菌种。在赤铁矿存在下，在高营养培养基上富集和分离出某些需氧菌种。几个分离出的菌株显示出对铁矿石的亲和力，在富集培养中附着于赤铁矿，并通过粘附研究进一步证明。已知其他分离的物种，如Ralstonia isidiosa和Pseudomonasrnstutzeri可溶解土壤中的磷酸盐磷酸盐，并具有从澳大利亚铁矿石中去除磷的潜力。

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  • 来源
    《Iron ore 2011》|2011年|p.397-402|共6页
  • 会议地点 Perth(AU)
  • 作者

    R Dwyer; S Rea; W Bruckard; R Holmes;

  • 作者单位

    CSIRO Land and Water, PO Box 7229, Karawara WA 6152. Email: bec.dwyer@csiro.au;

    CSIRO Land and Water, PO Box 7229, Karawara WA 6152. Email: suzy.rea@csiro.au;

    CSIRO Process Science and Engineering, Box 312, Clayton South Vic 3169. Email: warren.bruckard@csiro.au;

    CSIRO Minerals Down Under National Research Flagship, Box 312, Clayton South Vic 3169. Email: ralph.holmes@csiro.au;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
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