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首页> 外文期刊>Environmental Science & Technology >Fate of 4-Nonylphenol and 17β-Estradiol in the Redwood River of Minnesota
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Fate of 4-Nonylphenol and 17β-Estradiol in the Redwood River of Minnesota

机译：明尼苏达州红木河中4-壬基酚和17β-雌二醇的命运

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摘要

The majority of previous research investigating the fate of endocrine-disrupting compounds has focused on single processes generally in controlled laboratory experiments, and limited studies have directly evaluated their fate and transport in rivers. This study evaluated the fate and transport of 4-nonyiphenol, 17β-estradiol, and estrone in a 10-km reach of the Redwood River in southwestern Minnesota. The same parcel of water was sampled as it moved downstream, integrating chemical transformation and hydrologic processes. The conservative tracer bromide was used to track the parcel of water being sampled, and the change in mass of the target compounds relative to bromide was determined at two locations downstream from a wastewater treatment plant effluent outfall. In-stream attenuation coefficients (k_(stream)) were calculated by assuming first-order kinetics (negative values correspond to attenuation, whereas positive values indicate production). Attenuation of 17β-estradiol (k_(stream) = -3.2 ± 1.0 day~(-1)) was attributed primarily due to sorption and biodegradation by the stream biofilm and bed sediments. Estrone (k_(stream) = 0.6 ± 0.8 day~(-1)) and 4-nonylphenol (k_(stream) = 1.4 ± 1.9 day"') were produced in the evaluated 10-km reach, likely due to biochemical transformation from parent compounds (l7β-estradiol, 4-nonylphenolpolyethoxylates, and 4-nonyphenolpolyethoxycarboxylates). Despite attenuation, these compounds were transported kilometers downstream, and thus additive concentrations from multiple sources and transformation of parent compounds into degradates having estrogenic activity can explain their environmental persistence and widespread observations of biological disruption in surface waters.
机译：以往大多数研究干扰内分泌化合物命运的研究都集中在控制实验室实验中的单一过程上，而有限的研究直接评估了它们在河流中的命运和运输。这项研究评估了在明尼苏达州西南部的红木河10公里处4-壬基酚，17β-雌二醇和雌酮的命运和运输。当同一水流向下游移动时，对它们进行了采样，整合了化学转化和水文过程。使用保守的示踪剂溴化物来跟踪采样的水，并在废水处理厂废水排放口下游的两个位置确定目标化合物相对于溴化物的质量变化。通过假设一阶动力学（负值对应于衰减，而正值表示生成）来计算流内衰减系数（k_（stream））。 17β-雌二醇的衰减（k_（stream）= -3.2±1.0天〜（-1））主要归因于河流生物膜和床层沉积物的吸附和生物降解。在评估的10公里范围内产生了雌酮（k_（stream）= 0.6±0.8天〜（-1））和4-壬基苯酚（k_（stream）= 1.4±1.9天“'），可能是由于尽管被衰减，但这些化合物还是向下游迁移了几公里，因此，尽管这些化合物被衰减，但它们从多种来源的添加浓度以及母体化合物转化为具有雌激素活性的降解物，可以解释其环境持久性和地表水中生物破坏的广泛观察。

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  • 来源
    《Environmental Science & Technology》 |2012年第2期|p.860-868|共9页
  • 作者

    Jeffrey H. Writer; Joseph N. Ryan; Steffanie H. Keefe; Larry B. Barber;

  • 作者单位

    U.S. Geological Survey, 321S Marine Street, Boulder, Colorado 80303, United States,Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, 428 UCB, Boulder, Colorado 80309, United States;

    U.S. Geological Survey, 321S Marine Street, Boulder, Colorado 80303, United States;

    U.S. Geological Survey, 321S Marine Street, Boulder, Colorado 80303, United States;

  • 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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