...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Biodegradability of Lingering Crude Oil 19 Years after the Exxon Valdez Oil Spill
【24h】

Biodegradability of Lingering Crude Oil 19 Years after the Exxon Valdez Oil Spill

机译：埃克森·瓦尔迪兹溢油事故发生19年后残留原油的生物降解性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In 2001 and 2003, geospatial surveys of lingering oil were conducted in Prince William Sound (PWS) resulting in a prediction of significant acreage being contaminated with substantial subsurface oil from the 1989 Exxon Valdez oil spill (EVOS). In 2007, other researchers developed a mass weathering index (MWI) based on the degree of weathering of PAHs normalized to conserved biomarkers: if the degree of weathering of oil is 70% or more, further attempts at bioremediation would be unjustified. The objective of our study was to measure the biodegradability of the 19-year lingering oil in laboratory microcosms. Samples of beach substrate were collected from representative sites in PWS contaminated with oil residues of varying weathering states according to the MWI model. Enough sacrificial microcosms were set up to accommodate two treatments for each site (natural attenuation and biostimulation). Results indicated that lingering oil is biodegradable. Nutrient addition stimulated biodegradation compared to natural attenuation in all treatments regardless of the degree of weathering. The most weathered oil according to the MWI was the most biodegradable. Substantial biodegradation occurred in the natural attenuation microcosms due to the high sediment Total Kjeldahl Nitrogen (TKN), which served as a nitrogen source for biodegradation. Most of the observed biodegradation was due to the presence of dissolved oxygen. Nitrogen was a limiting factor but oxygen was the predominant one.
机译：在2001年和2003年，在威廉王子湾（PWS）进行了残留油的地理空间调查，结果表明，1989年埃克森·瓦尔迪兹（Exxon Valdez）溢油（EVOS）产生的大量地下油污染了大面积土地。 2007年，其他研究人员根据标准化为保守生物标记的PAH的风化程度，开发了质量风化指数（MWI）：如果油的风化度为70％或更高，则进一步进行生物修复的尝试将是不合理的。我们研究的目的是测量实验室微观世界中19年挥之不去的油脂的生物降解能力。根据MWI模型，从受不同风化状态的油渣污染的PWS的代表性地点收集海滩基质样品。建立了足够的牺牲缩影，以适应每个部位的两种处理（自然衰减和生物刺激）。结果表明，留存的油是可生物降解的。在所有处理中，与自然衰减相比，营养添加都可促进生物降解，而与风化程度无关。根据MWI，最风化的油是最易生物降解的。由于高沉积物总凯氏氮（TKN）含量很高，自然衰减微观世界中发生了重大的生物降解，而氮是生物降解的氮源。观察到的大多数生物降解是由于存在溶解氧。氮是一种限制因素，而氧气是主要的限制因素。

著录项

  • 来源
    《Environmental Science & Technology》 |2010年第19期|p.7613-7621|共9页
  • 作者

    ALBERT D. VENOSA; PABLO CAMPO; MAKRAM T. SUIDAN;

  • 作者单位

    U.S. Environmental Protection Agency, Cincinnati, Ohio 45268;

    rnDepartment of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221;

    rnDepartment of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号