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首页> 外文期刊>Journal of Environmental Science and Health >A novel process to treat spent petroleum catalyst using sulfur-oxidizing lithotrophs
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A novel process to treat spent petroleum catalyst using sulfur-oxidizing lithotrophs

机译：用硫氧化石蜡处理废石油催化剂的新方法

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摘要

A novel process was developed using sulfur-oxidizing bacteria to extract metal values like Ni, V and Mo from spent petroleum catalyst. Bacteria were grown in elemental sulfur media for five day and after filtering, the filtrate was used for leaching purpose. Effect of different parameters such as contact time, particle size, pulp density and lixiviant composition were studied to find out the extent of metal leaching during the leaching process. XRD analysis proved the existence of V in oxide form, Ni in sulfide form, Mo both in oxide as well as sulfide forms, and sulfur in elemental state only. In all the cases studied Ni and V showed higher leaching efficiency compared to Mo. The low Mo leaching rate may be either due to formation of impervious sulfur layer or refractoriness of sulfides or both. Leaching kinetics followed dual rate, initial faster followed by slower. Dissolution mechanism was explained on the basis of both surface and pore diffusion rate. The leaching kinetics followed 1st order reaction rate. Finally, multiple linear regression analysis was carried out to compare the observed and calculated leaching percentage values for three metals.
机译：开发了一种使用硫氧化细菌从废石油催化剂中提取镍，钒和钼等金属价值的新方法。细菌在元素硫培养基中生长五天，过滤后，滤液用于淋滤目的。研究了接触时间，粒度，纸浆密度和浸滤剂组成等不同参数的影响，以找出浸出过程中金属浸出的程度。 XRD分析证明存在以氧化物形式存在的V，以硫化物形式存在的Ni，以氧化物以及硫化物形式存在的Mo以及仅以元素态存在的硫。在所有研究的案例中，镍和钒的浸出效率均高于钼。较低的钼浸出率可能是由于形成了不渗透的硫层或硫化物的难熔性或两者兼而有之。浸出动力学遵循双重速率，最初更快，随后更慢。根据表面和孔的扩散速率解释了溶解机理。浸出动力学遵循一级反应速率。最后，进行了多元线性回归分析，以比较观察到的和计算出的三种金属的浸出百分比值。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2009年第14期|1585-1591|共7页
  • 作者

    DONG J. KIM; DEBARAJ MISHRA; JONG G. AHN; GAUTAM R. CHAUDHURY; DAVID E. RALPH;

  • 作者单位

    Minerals and Material Processing Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea;

    Minerals and Material Processing Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea;

    Minerals and Material Processing Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea;

    Environment and Sustainability, Institute of Minerals and Materials Technology, Bhubaneswar, India;

    AJ Parker CRC for Hydrometallurgy, Murdoch University, Perth, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bioleaching; acidophilic bacteria; spent catalyst; regression analysis;

    机译：生物浸出嗜酸细菌废催化剂回归分析;

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