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Ozonation of Oil Sands Process-Affected Water Accelerates Microbial Bioremediation

机译：受油砂臭氧处理影响的水促进了微生物的生物修复

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摘要

Ozonation can degrade toxic naphthenic acids (NAsI in oil sands process-affected water (OSPW), but even after extensive treatment a residual NA fraction remains. Here we hypothesized that mild ozonation would selectively oxidize the most biopersistent NA fraction, thereby accelerating subsequent NA biodegradation and toxicity removal by indigenous microbes. OSPW was ozonated to achieve approximately 50% and 75% NA degradation, and the major ozonation byproducts included oxidized NAs (i.e., hydroxy- or keto-NAs). However, oxidized NAs are already present in untreated OSPW and were shown to be formed during the microbial biodegradation of NAs. Ozonation alone did not affect OSPW toxicity, based on Microtox; however, there was a significant acceleration of toxicity removal in ozonated OSPW following inoculation with native microbes. Furthermore, all residual NAs biodegraded significantly faster in ozonated OSPW. The opposite trend was found for ozonated commercial NAs, which are known to contain no significant biopersistent fraction. Thus, we suggest that ozonation preferentially degraded the most biopersistent OSPW NA fraction, and that ozonation is complementary to the biodegradation capacity of microbial populations in OSPW. The toxicity of ozonated OSPW to higher organisms needs to be assessed, but there is promise that this technique could be applied to accelerate the bioremediation of large volumes of OSPW in Northern Alberta, Canada.
机译：臭氧化可以降解有毒环烷酸（油砂工艺用水中的NAsI），但即使经过大量处理，残留的NA分数仍然存在。臭氧化OSPW可实现约50％和75％的NA降解，并且主要的臭氧化副产物包括氧化型NA（即羟基或酮型NA），但是未经处理的OSPW中已经存在氧化型NA。基于Microtox，单独的臭氧分解不会影响OSPW的毒性；但是，接种天然微生物后，臭氧化的OSPW的毒性去除速度显着加快，此外，所有残留的NAs都会被生物降解。臭氧化OSPW的速度显着加快。臭氧化商业化NA的趋势相反。不含明显的生物持久性成分。因此，我们建议臭氧化作用优先降解大多数生物持久性OSPW NA组分，并且臭氧化作用与OSPW中微生物种群的生物降解能力互补。需要评估臭氧化的OSPW对高等生物的毒性，但是有希望将该技术应用于加拿大北阿尔伯塔省的大量OSPW的生物修复。

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  • 来源
    《Environmental Science & Technology》 |2010年第21期|p.8350-8356|共7页
  • 作者

    JONATHAN W. MARTIN; THAER BARRI; XIUMEI HAN; PHILLIP M. FEDORAK; MOHAMED GAMAL EL-DIN; LEONIDAS PEREZ; ANGELA C. SCOTT; JASON TIANGE JIANG;

  • 作者单位

    Division of Analytical & Environmental Toxicology, University of Alberta,Edmonton, Alberta, Canada;

    rnDivision of Analytical & Environmental Toxicology, University of Alberta,Edmonton, Alberta, Canada;

    rnDivision of Analytical & Environmental Toxicology, University of Alberta,Edmonton, Alberta, Canada;

    rnDepartment of Biological Sciences, University of Alberta,Edmonton, Alberta, Canada;

    rnDepartment of Civil & Environmental Engineering, University of Alberta,Edmonton, Alberta, Canada;

    rnDivision of Analytical & Environmental Toxicology, University of Alberta,Edmonton, Alberta, Canada;

    rnDepartment of Agricultural,Food & Nutritional Science, University of Alberta,Edmonton, Alberta, Canada;

    rnDivision of Analytical & Environmental Toxicology, University of Alberta,Edmonton, Alberta, Canada;

  • 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);
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