Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120, Krakow, Poland.
European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90-364, Lodz, Poland.
Ecotoxicology. 2021 Jan;30(1):57-66. doi: 10.1007/s10646-020-02318-w. Epub 2020 Dec 6.
The information about concentrations of dioxin in pore water, ecotoxicity and DOC and TOC content can be key factor for the prediction of the fate of dioxins in the aquatic environment as well as an ecological risk assessment. The aims of the study were to assess the concentration of PCDDs/PCDFs and ecotoxicity of pore water and to compare above results in relation to the dissolved organic carbon (DOC) and total organic carbon (TOC) content. The concentration of dioxins was assessed using an enzyme-linked immunoassay test, while the ecotoxicity of pore water was determined using a crustacean Daphnia magna and bacteria Aliivibrio fischeri. The studies were conducted on two different dammed reservoirs Rożnów (catchment basin of an agricultural character) and Rybnik (catchment basin of an industrial character) located in southern Poland. The concentration of dioxins in pore water was between 8.56 to 90.92 ng EQ/L, with a significantly higher concentration in the pore water from the Rożnów Reservoir than the Rybnik Reservoir. The DOC content in pore water was from 30.29 to 63.02 mg/L (Rożnów Reservoir) and from 35.46 to 60.53 mg/L (Rybnik Reservoir). Higher toxic responses were recorded for A. fischeri than for D. magna. Moreover a significantly higher toxicity for both tested organisms was indicated in pore water from the Rożnów Reservoir. Besides of TOC and DOC, the fine fractions of the sediments were particularly important in the concentration of dioxin in pore water. The other pore water parameters, such as pH and EC can influence the toxicity of water for organisms. The result indicate complex relationships between the PCDD/F, ecotoxicity and DOC, TOC concentration in pore water and confirms that these parameters are important in terms of water environmental contamination.
水中二恶英的浓度、生态毒性以及 DOC 和 TOC 含量的信息可以成为预测水生环境中二恶英命运和生态风险评估的关键因素。本研究的目的是评估底泥水中二恶英的浓度和生态毒性，并比较这些结果与溶解有机碳（DOC）和总有机碳（TOC）含量的关系。使用酶联免疫吸附试验（ELISA）检测二恶英浓度，使用甲壳类动物大型溞（Daphnia magna）和细菌发光菌（Aliivibrio fischeri）检测底泥水的生态毒性。研究在两个不同的水坝水库（罗兹诺水库和雷布尼克水库）进行，这两个水坝位于波兰南部，具有不同的集水区特征，一个是农业特征，另一个是工业特征。底泥水中二恶英的浓度在 8.56 到 90.92ng EQ/L 之间，罗兹诺水库底泥水中的浓度明显高于雷布尼克水库。底泥水中的 DOC 含量在 30.29 到 63.02mg/L（罗兹诺水库）和 35.46 到 60.53mg/L（雷布尼克水库）之间。发光菌对 A. fischeri 的毒性反应高于大型溞。此外，在罗兹诺水库的底泥水中，两种测试生物的毒性均显著较高。除了 TOC 和 DOC 外，沉积物的细颗粒对底泥水中二恶英的浓度也特别重要。其他底泥水参数，如 pH 和 EC 也会影响水中生物的毒性。研究结果表明，底泥水中 PCDD/Fs、生态毒性与 DOC、TOC 浓度之间存在复杂关系，证实了这些参数在水环境污染方面的重要性。
