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首页> 外文期刊>Environmental Science & Technology >Bioaugmentation Mitigates the Impact of Estrogen on Coliform-Grazing Protozoa in Slow Sand Filters
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Bioaugmentation Mitigates the Impact of Estrogen on Coliform-Grazing Protozoa in Slow Sand Filters

机译：生物强化减轻了慢速砂滤池中雌激素对大肠放牧原生动物的影响

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摘要

Exposure to endocrine-disrupting chemicals (EDCs), such as estrogens, is a growing issue for human and animal health as they have been shown to cause reproductive and developmental abnormalities in wildlife and plants and have been linked to male infertility disorders in humans. Intensive fanning and weather events, such as storms, flash flooding, and landslides, contribute estrogen to waterways used to supply drinking water. This paper explores the impact of estrogen exposure on the performance of slow sand filters (SSFs) used for water treatment The feasibility and efficacy of SSF bioaugmentation with estrogen-degrading bacteria was also investigated, to determine whether removal of natural estrogens (estrone, estradiol, and estriol) and overall SSF performance for drinking water treatment could be improved. Strains for SSF augmentation were isolated from full-scale, municipal SSFs so as to optimize survival in the laboratory-scale SSFs used. Concentrations of the natural estrogens, determined by gas chromatography coupled with mass spectrometry (GC-MS), revealed augmented SSFs reduced the overall estrogenic potency of the supplied water by 25% on average and removed significantly more estrone and estradiol than nonaugmented filters. A negative correlation was found between coliform removal and estrogen concentration in nonaugmented filters. This was due to the toxic inhibition of protozoa, indicating that high estrogen concentrations can have functional implications for SSFs (such as impairing coliform removal). Consequently, we suggest that high estrogen concentrations could impact significantly on water quality production and, in particular, on pathogen removal in biological water filters.
机译：暴露于破坏雌激素的内分泌化学物质（EDC）对人类和动物健康而言是一个日益严重的问题，因为已证明它们会导致野生动植物和植物的生殖和发育异常，并与人类男性不育症相关。剧烈的散开和天气事件，例如暴风雨，山洪暴发和山体滑坡，为用于供水的水道贡献了雌激素。本文探讨了雌激素暴露对用于水处理的慢砂滤池（SSF）性能的影响。还研究了利用雌激素降解细菌进行SSF生物强化的可行性和功效，以确定是否去除了天然雌激素（雌酮，雌二醇，和雌三醇）和饮用水处理的整体SSF性能可以得到改善。从大规模的市政SSF中分离出用于SSF扩增的菌株，以优化所用实验室规模SSF的存活率。通过气相色谱-质谱联用（GC-MS）测定的天然雌激素浓度显示，增强的SSF可使所供水的总雌激素效价平均降低25％，并且与非增强型过滤器相比，雌激素和雌二醇的去除率更高。在大肠菌过滤器中，大肠菌群去除与雌激素浓度之间呈负相关。这是由于原生动物的毒性抑制，表明高浓度的雌激素可能对SSF产生功能性影响（例如大肠菌去除能力受损）。因此，我们建议高浓度的雌激素可能会显着影响水质生产，尤其是对生物滤水器中病原体的去除。

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  • 来源
    《Environmental Science & Technology》 |2016年第6期|3101-3110|共10页
  • 作者

    Sarah-Jane Haig; Caroline Gauchotte-Lindsay; Gavin Collins; Christopher Quince;

  • 作者单位

    School of Engineering, Rankine Building, University of Glasgow, Glasgow G12 8LT, U.K.,Department of Civil & Environmental Engineering, University of Michigan, Michigan, USA;

    School of Engineering, Rankine Building, University of Glasgow, Glasgow G12 8LT, U.K.;

    School of Engineering, Rankine Building, University of Glasgow, Glasgow G12 8LT, U.K.,Microbial Ecophysiology Laboratory, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland;

    School of Engineering, Rankine Building, University of Glasgow, Glasgow G12 8LT, U.K.,Warwick Medical School, University of Warwick, Warwick, UK;

  • 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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