Flanagan Kelsey, Blecken Godecke-Tobias, Österlund Heléne, Viklander Maria
Urban Water Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå 971 87, Sweden.
Urban Water Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå 971 87, Sweden.
J Hazard Mater. 2025 Aug 15;494:138451. doi: 10.1016/j.jhazmat.2025.138451. Epub 2025 May 2.
32 urban stormwater pond sediment samples were analyzed for 259 organic substances, 13 trace elements, physico-chemical parameters and acute toxicity of eluates to the bioluminescent bacteria Aliivibrio fischeri according to the Microtox® method. Five of these samples showed some toxicity to Aliivibrio fischeri. Statistical analysis was conducted to identify substances with significantly different concentrations between toxic and non-toxic samples, as well as differences in contaminant patterns between these sets. Results showed no significant differences in trace element, organic contaminant concentrations or overall contaminant patterns between toxic and non-toxic samples. However, dissolved oxygen was significantly lower in toxic than in non-toxic samples, likely due to an influence on the lability of contaminants. This work highlights the difficulty of conducting a pertinent and robust environmental hazard assessment for complex matrices composed of a large number of substances present at low concentrations and discusses the advantages and limitations of both chemical and biological approaches to environmental hazard assessment for urban stormwater sediments. Because the evaluation of urban stormwater sediments is so complex, to comprehensively and accurately analyse its risks, it is very important to consider both biological and chemical factors. Considering both will provide an accurate identification of possible risks and enhanced control of environmental risks in urban areas.
根据Microtox®方法，对32个城市雨水池塘沉积物样本进行了分析，检测了其中259种有机物质、13种微量元素、理化参数以及洗脱液对发光细菌费氏弧菌的急性毒性。其中5个样本对费氏弧菌表现出一定毒性。进行了统计分析，以确定有毒和无毒样本之间浓度有显著差异的物质，以及这两组样本之间污染物模式的差异。结果表明，有毒和无毒样本之间在微量元素、有机污染物浓度或总体污染物模式方面没有显著差异。然而，有毒样本中的溶解氧明显低于无毒样本，这可能是由于对污染物活性的影响。这项工作凸显了对由大量低浓度物质组成的复杂基质进行相关且可靠的环境危害评估的困难，并讨论了化学和生物方法在城市雨水沉积物环境危害评估中的优缺点。由于城市雨水沉积物的评估非常复杂，为了全面准确地分析其风险，同时考虑生物和化学因素非常重要。综合考虑两者将准确识别可能的风险，并加强对城市地区环境风险的控制。
