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首页> 外文期刊>Materials science & engineering >The nature of Schwertmannite and Jarosite mediated by two strains of Acidithiobacillus ferrooxidans with different ferrous oxidation ability
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The nature of Schwertmannite and Jarosite mediated by two strains of Acidithiobacillus ferrooxidans with different ferrous oxidation ability

机译：两株具有不同亚铁氧化能力的酸性氧化硫硫杆菌介导的Schwertmannite和Jarosite的性质

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摘要

Jarosite and Schwertmannite are iron-oxyhydroxysulfate materials. These materials gain increasing interest in geological and metallurgical fields. Especially, for it can effectively scavenge heavy metals, less toxic ions and better bio-compatibility, the application potential in environment becomes more and more intriguing. In this study, the nature of Jarosite and Schwertmannite mediates synthesized by two strains of Acidithiobacillus ferrooxidans with different ferrous oxidation ability is investigated. The precipitates are characterized by SEM, XRD, FTIR, and TG/DSC analysis. The materials are varied in color, shape, surface area, elemental composition and crystallinity. The crystallinity of precipitate produced by A ferrooxidans 23270 with lower oxidation ability in optimized medium is significantly better than the precipitate produced by A ferrooxidans Gf. A ferrooxidans Gf will tend to mediate the formation of Schwertmannite with the decreasing of monovalent cation concentration in optimized medium. Cr(Ⅵ) adsorption capacity difference exists among the four materials. The adsorption efficiency of Schwertmannite is higher than Jarosite. Adsorption capacity of the materials formed by A ferrooxidans Gf is higher than that of A ferrooxidans 23270. Adsorption capacity decreases with the increasing of crystallinity.
机译：黄铁矿和Schwertmannite是氧-羟基羟基硫酸铁材料。这些材料在地质和冶金领域越来越受到关注。特别是，由于它可以有效地清除重金属，减少毒性离子并具有更好的生物相容性，因此在环境中的应用潜力越来越引人入胜。在本研究中，研究了由具有不同亚铁氧化能力的两株铁氧化酸硫硫杆菌合成的Jarosite和Schwertmannite介质的性质。通过SEM，XRD，FTIR和TG / DSC分析对沉淀物进行表征。这些材料的颜色，形状，表面积，元素组成和结晶度各不相同。在优化的培养基中，具有较低氧化能力的A氧化铁23270产生的沉淀物的结晶度显着优于Af氧化铁Gf产生的沉淀物。随着优化培养基中单价阳离子浓度的降低，铁氧化铁Gf倾向于介导Schwertmannite的形成。四种材料之间存在Cr（Ⅵ）吸附能力的差异。 Schwertmannite的吸附效率高于Jarosite。由氧化亚铁Gf形成的材料的吸附能力高于氧化亚铁23270。随着结晶度的增加，吸附能力下降。

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  • 来源
    《Materials science & engineering》 |2013年第5期|2679-2685|共7页
  • 作者

    Jianyu Zhu; Min Gan; Dan Zhang; Yuehua Hu; Liyuan Chai;

  • 作者单位

    School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China,Key Laboratory of Biohydrometallurgy of Ministry of Education, Changsha 410083, China,School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;

    School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China,Key Laboratory of Biohydrometallurgy of Ministry of Education, Changsha 410083, China;

    School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China,Key Laboratory of Biohydrometallurgy of Ministry of Education, Changsha 410083, China;

    School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China,Key Laboratory of Biohydrometallurgy of Ministry of Education, Changsha 410083, China;

    Key Laboratory of Biohydrometallurgy of Ministry of Education, Changsha 410083, China,School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;

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  • 正文语种 eng
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  • 关键词

    Jarosite; Schwertmannite; Acidithiobacillus ferrooxidans; Ferrous oxidation ability; Cr(Ⅵ) adsorption;

    机译：黄铁矿;Schwertmannite;酸性氧化硫杆菌亚铁的氧化能力;Cr（Ⅵ）的吸附;

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