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首页> 外文期刊>Journal of the American Water Resources Association >LAGRANGIAN SAMPLING FOR EMERGING CONTAMINANTS THROUGH AN URBAN STREAM CORRIDOR IN COLORADO
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LAGRANGIAN SAMPLING FOR EMERGING CONTAMINANTS THROUGH AN URBAN STREAM CORRIDOR IN COLORADO

机译：通过科罗拉多州城市流道走廊中新兴污染物的拉格朗日采样

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Recent national concerns regarding the environmental occurrence of emerging contaminants (ECs) have catalyzed a series of recent studies. Many ECs are released into the environment through discharges from wastewater treatment plants (WWTPs) and other sources. In 2005, the U.S. Geological Survey and the City of Longmont initiated an investigation of selected ECs in a 13.8-km reach of St. Vrain Creek, Colorado. Seven sites were sampled for ECs following a Lagrangian design; sites were located upstream, downstream, and in the outfall of the Longmont WWTP, and at the mouths of two tributaries, Left Hand Creek and Boulder Creek (which is influenced by multiple WWTP outfalls). Samples for 61 ECs in 16 chemical use categories were analyzed and 36 were detected in one or more samples. Of these, 16 have known or suspected endocrine-disrupting potential. At and downstream from the WWTP outfall, detergent metabolites, fire retardants, and steroids were detected at the highest concentrations, which commonly exceeded 1 μgΛ in 2005 and 2 μgΛ in 2006. Most individual ECs were measured at concentrations less than 2 μgΛ. The results indicate that outfalls from WWTPs are the largest but may not be the sole source of ECs in St. Vrain Creek. In 2005, high discharge was associated with fewer EC detections, lower total EC concentrations, and smaller EC loads in St. Vrain Creek and its tributaries as compared with 2006. EC behavior differed by individual compound, and some differences between sites could be attributed to analytical variability or to other factors such as physical or chemical characteristics or distance from contributing sources. Loads of some ECs, such as diethoxynonylphenol, accumulated or attenuated depending on location, discharge, and distance downstream from the WWTP, whereas others, such as bisphenol A, were largely conservative. The extent to which ECs in St. Vrain Creek affect native fish species and macroinverte-brate communities is unknown, but recent studies have shown that fish respond to very low concentrations of ECs, and further study on the fate and transport of these contaminants in the aquatic environment is warranted.
机译：最近国家对新兴污染物（ECs）的环境发生的关注催生了一系列最新研究。许多EC通过废水处理厂（WWTP）和其他来源的排放释放到环境中。 2005年，美国地质调查局和朗蒙特市（Longmont）发起了对科罗拉多州圣沃伦克里克（St. Vrain Creek）13.8公里范围内选定EC的调查。按照拉格朗日设计，对七个EC进行了采样；站点位于朗蒙特污水处理厂的上游，下游和排水口，并位于两个支流的口，左手河和博尔德河（受多个污水处理厂排水口的影响）。分析了16种化学用途类别中61个EC的样品，并在一个或多个样品中检测到36个EC。其中有16种已知或怀疑有破坏内分泌的潜力。在污水处理厂排污口及其下游，检测到最高浓度的洗涤剂代谢物，阻燃剂和类固醇，通常在2005年超过1μgΛ，在2006年超过2μgΛ。多数单个EC的浓度均低于2μgΛ。结果表明，污水处理厂的排污口最大，但可能不是圣Vrain Creek的EC的唯一来源。与2006年相比，2005年的高排放量与圣Vrain Creek及其支流的EC检测量减少，总EC浓度降低和EC负荷降低有关。EC行为因单个化合物而异，并且不同地点之间的某些差异可归因于分析变异性或其他因素，例如物理或化学特征或与来源的距离。一些EC的负荷（如二乙氧基壬基酚）根据废水处理厂的位置，排放量和下游距离而累积或减弱，而其他EC（如双酚A）则在很大程度上是保守的。尚不知道圣Vrain Creek中ECs对本地鱼类和大型无脊椎动物群落的影响程度，但最近的研究表明，鱼类对极低浓度的ECs有反应，并进一步研究了这些污染物在鱼类体内的命运和运输。保证水生环境。

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