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首页> 外文期刊>Journal of Hazardous Materials >Production of bioemulsiflers by Amycolatopsis tucumanensis DSM 45259 and their potential application in remediation technologies for soils contaminated with hexavalent chromium
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Production of bioemulsiflers by Amycolatopsis tucumanensis DSM 45259 and their potential application in remediation technologies for soils contaminated with hexavalent chromium

机译：DSM 45259产曲霉霉菌生物乳化剂的生产及其在六价铬污染土壤修复技术中的潜在应用

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摘要

In recent years, increasing interest has been shown in the use of bioemulsifiers as washing agents that can enhance desorption of soil-bound metals. However, high production costs derived from the use of expensive substrates for formulation of the fermentation media represent the main challenge for full, large-scale implementation of bioemulsifiers. This work reports on a first study of bioemulsifier production by the actinobacterium Amycolatopsis tucumanensis DSM 45259 using different carbon and nitrogen sources. Preliminary results on the potential use of these compounds as washing agents for soils contaminated with Cu(Ⅱ) and Cr(Ⅵ) are also presented. The best specific production was detected using glycerol and urea as carbon and nitrogen substrates, respectively. However, with all of the substrates used during the batch assay, the bioemulsifiers showed high levels of stability at extreme conditions of pH, temperature, and salt concentration. Under the current assay conditions, the bioemulsifiers were not effective in removing Cu(Ⅱ) from soil. However, they were able to mediate Cr(Ⅵ) recovery, with the removal percentage doubled compared to that seen when using deionized water. These findings appear promising for the development of remediation technologies for hexavalent chromium compounds based upon direct use of these microbial emulsifiers.
机译：近年来，人们越来越关注使用生物乳化剂作为可增强结合土壤的金属解吸的洗涤剂。然而，由于使用昂贵的底物来配制发酵培养基而导致的高生产成本代表了生物乳化剂的全面，大规模实施的主要挑战。这项工作是关于使用不同碳源和氮源的放线菌（Amycolatopsis tucumanensis DSM 45259）生产生物乳化剂的首次研究报告。还提出了这些化合物作为洗涤剂对被Cu（Ⅱ）和Cr（Ⅵ）污染的土壤的潜在用途的初步结果。分别使用甘油和尿素作为碳和氮底物可以检测到最佳的单位产物。但是，在分批测定过程中使用所有底物时，生物乳化剂在极端的pH，温度和盐浓度条件下均显示出高水平的稳定性。在目前的测定条件下，该生物乳化剂不能有效去除土壤中的Cu（Ⅱ）。但是，它们能够介导Cr（Ⅵ）的回收，与使用去离子水时相比，去除率翻了一番。这些发现对于基于直接使用这些微生物乳化剂的六价铬化合物修复技术的发展很有希望。

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  • 来源
    《Journal of Hazardous Materials》 |2013年第15期|577-583|共7页
  • 作者

    Veronica Leticia Colin; Maria Fernanda Castro; Maria Julia Amoroso; Liliana Beatriz Villegas;

  • 作者单位

    Planta Piloto de Procesos Industriales y Microbiologicos (PROIMI), CONICET, Av. Belgrano y Pje. Caserns, 4000 Tucuman, Argentina,Universidad de San Pablo-Tucuman, Argentina,Planta Piloto de Procesos Industriales y Microbiologi-cos (PROIMI), CONICET, Av. Belgrano y Pasaje Caseros, 4000 Tucuman, Argentina;

    Planta Piloto de Procesos Industriales y Microbiologicos (PROIMI), CONICET, Av. Belgrano y Pje. Caserns, 4000 Tucuman, Argentina;

    Planta Piloto de Procesos Industriales y Microbiologicos (PROIMI), CONICET, Av. Belgrano y Pje. Caserns, 4000 Tucuman, Argentina,Facultad de Ciencias de la Salud, Universidad del None Santo Tomas de Aquino-Tucuman, Argentina,Facultad de Bioquimica, Quimica y Farmacia, Universidad Nacional de Tucuman, 4000 Tucuman, Argentina;

    Planta Piloto de Procesos Industriales y Microbiologicos (PROIMI), CONICET, Av. Belgrano y Pje. Caserns, 4000 Tucuman, Argentina,Facultad de Ciencias de la Salud, Universidad del None Santo Tomas de Aquino-Tucuman, Argentina;

  • 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

    Bioemulsifiers; Actinobacterium; Heavy metals; Soil washing;

    机译：生物乳化剂;放线杆菌;重金属;土壤清洗;

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