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首页> 外文期刊>Environmental toxicology and chemistry >SIMILARITIES IN BIOACCUMULATION PATTERNS OF POLYCHLORINATED DIBENZO-p-DIOXINS AND FURANS AND POLYCHLORINATED DIPHENYL ETHERS IN LABORATORY-EXPOSED OLIGOCHAETES AND SEMIPERMEABLE MEMBRANE DEVICES AND IN FIELD-COLLECTED CHIRONOMIDS
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SIMILARITIES IN BIOACCUMULATION PATTERNS OF POLYCHLORINATED DIBENZO-p-DIOXINS AND FURANS AND POLYCHLORINATED DIPHENYL ETHERS IN LABORATORY-EXPOSED OLIGOCHAETES AND SEMIPERMEABLE MEMBRANE DEVICES AND IN FIELD-COLLECTED CHIRONOMIDS

机译：实验室暴露的低聚糖和半渗透性膜装置中以及现场收集的类人动物体内多氯联苯-对二恶英和呋喃和多氯联苯的生物累积模式相似

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Sediment and chironomid samples were collected from a river in the vicinity of and downstream from a closed chlo-rophenol production plant, and they were analyzed for polychlorinated dibenzo-p-dioxins and furans (PCDD/F) and polychlorinated diphenyl ethers (PCDE). Bioaccumulation of these compounds from the sediments by the oligochaeta, Lumbriculus variegalus, and semipermeable membrane devices (SPMDs) was studied in a 28-d bioaccumulation test. The sum concentrations of PCDD/Fs and PCDEs in sediments varied spatially, peaking at the site below the production plant, but the congener composition remained fairly constant throughout the river. The sum concentrations of chironomids, oligochaetes, and SPMDs all varied independently of sediment concentrations. Both invertebrates accumulated more PCDEs, whereas PCDD/Fs dominated in sediments and SPMDs. Despite the variable sum concentrations, similarities were observed in concentrations and compositions of individual congeners. A significant correlation was found between sediments and oligochaetes, and between oligochaetes and chironomids, for both PCDD/Fs and PCDEs. These results suggest that bioaccumulation of PCDD/Fs and PCDEs in invertebrates is nonselective. Furthermore, the laboratory bioaccumulation tests seem to yield relevant results. The SPMDs were found to give good predictions of the PCDD/F concentrations of sediments and oligochaetes. For PCDEs, the estimates were slightly poorer, but still useful for preliminary concentration assessments.
机译：从封闭的氯酚生产厂附近和下游的一条河中收集了沉积物和螯合物样品，并对它们进行了多氯代二苯并-对-二恶英和呋喃（PCDD / F）和多氯代二苯醚（PCDE）的分析。在28天的生物富集测试中，研究了寡聚体，杂色羊草和半透膜装置（SPMD）从沉积物中对这些化合物的生物富集。沉积物中PCDD / Fs和PCDEs的总浓度在空间上变化，在生产厂下方的位置达到峰值，但在整个河流中，同类物的组成保持相当恒定。手足动物，寡壳动物和SPMD的总浓度都与沉积物浓度无关。两种无脊椎动物都积累了更多的PCDEs，而PCDD / Fs在沉积物和SPMDs中占主导地位。尽管总和浓度可变，但在各个同类物的浓度和组成方面仍观察到相似性。对于PCDD / Fs和PCDEs，在沉积物和低聚类之间，以及在低聚类和钟形类之间发现了显着的相关性。这些结果表明，PCDD / Fs和PCDEs在无脊椎动物中的生物蓄积是非选择性的。此外，实验室生物蓄积性测试似乎产生了相关结果。发现SPMD对沉积物和低纲类动物的PCDD / F浓度具有良好的预测。对于多氯二苯醚，估计值稍差一些，但仍可用于初步浓度评估。

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