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首页> 美国卫生研究院文献>other >Time-Integrated Monitoring of Dioxin-Like Polychlorinated Biphenyls (dl-PCBs) in Aquatic Environments using the Ceramic Toximeter and the CALUX Bioassay
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Time-Integrated Monitoring of Dioxin-Like Polychlorinated Biphenyls (dl-PCBs) in Aquatic Environments using the Ceramic Toximeter and the CALUX Bioassay

机译：使用陶瓷血氧仪和CALUX生物测定法对水环境中的二恶英样多氯联苯（dl-PCBs）进行时间集成监控

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Ceramic passive samplers or toximeters (packed with active carbon 1% w/w on celite), in combination with the CALUX bioassay have been used as a time-integrated monitoring technique for dissolved dioxin-like PCBs in urban and industrial wastewaters. The technique showed to be reliable during laboratory experiments: (1) PCB-126 amounts extracted from the passive samplers increased linearly with the time of exposure and (2) PCB-126 concentrations calculated from the amounts accumulated by the passive samplers were in agreement with their concentrations in the testing solution. Afterwards the toximeters were applied in the field. Two sampling sites located in Egypt were chosen: the Belbeis drainage canal, and the EMAK paper mill. A total of 18 ceramic toximeters were exposed to the wastewater in both sampling sites for a maximum period of 4 weeks. Two samplers were collected weekly from each site to monitor the increase in target analytes over time. Extracts were analyzed using the CALUX bioassay and the total dioxin-like PCB toxicity was reported for the aqueous phase (water column), as well as the solid phase (sediment and sludge) in both sampling sites. The time-weighted average concentration (TWA) of dl-PCBs in wastewater of the paper mill during the sampling period ranged between 7.1 and 9.1 pg-BEQ L-1, while that of the drainage canal ranged between 9.5 and 12.2 pg-BEQ L-1. The dl-PCBs in the fibrous sludge (paper mill) and bottom sediment (drainage canal) were 0.5 and 0.4 pg-BEQ g-1 dry-weight, respectively. The organic-carbon normalized partition coefficients between sediment and water (log Koc) for the paper mill and the canal were 2.4 and 4.3, respectively.
机译：陶瓷无源采样器或毒物测定仪（在硅藻土上填充了1％w / w的活性炭）与CALUX生物测定法结合使用，已成为一种时间集成的监测技术，用于监测城市和工业废水中的溶解性二恶英样PCB。该技术在实验室实验中证明是可靠的：（1）从无源采样器中提取的PCB-126量随暴露时间线性增加，并且（2）从无源采样器中累积的量计算出的PCB-126浓度与它们在测试溶液中的浓度。之后，将血氧仪应用于现场。选择了位于埃及的两个采样点：Belbeis排水渠和EMAK造纸厂。在两个采样点中，总共有18台陶瓷毒化仪暴露于废水中，最长为4周。每周从每个站点收集两个采样器，以监视目标分析物随时间的增加。使用CALUX生物测定法分析提取物，并报告了两个采样点中水相（水柱）以及固相（沉积物和污泥）的总二恶英样PCB毒性。造纸厂废水中dl-PCBs的时间加权平均浓度（TWA）在7.1至9.1 pg-BEQ L -1 范围内，而排水渠的时间加权平均浓度范围在7.1至9.1 pg-BEQ L -1 之间。 9.5和12.2 pg-BEQ L -1 。纤维污泥（造纸厂）和底泥（排水渠）中的dl-PCBs分别为干重0.5 pg-BEQ g -1 。造纸厂和运河的沉积物与水之间的有机碳归一化分配系数（log Koc）分别为2.4和4.3。

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