PDF(Pubmed)
Abstract：
Stormwater ponds are widely used for controlling runoff quality through the sedimentation of particles and associated pollutants. Their maintenance requires regular removal and disposal of accumulated material. This necessitates an assessment of material hazardousness, including potential hazard due to its contamination by metals. Here we analyze 32 stormwater pond sediment samples from 17 facilities using several chemical analysis methods (total extraction, sequential extraction, diffusive gradients in thin-films DGT, and pore water extraction) in order to consider the complementarity and comparability of the different approaches. No clear relationship was found between analyses that have the potential to measure similar metal fractions (DGT and either fraction 1 of the sequential extraction (adsorbed and exchangeable metals and carbonates) or pore water concentrations). Loss on ignition (LOI) had a significant positive correlation with an indicator of the environmental risk developed in this paper (∑ranks) that incorporates different metals, speciations, and environmental endpoints. Large variations in metal levels were observed between ponds. As clustering was limited between the different analyses, a comprehensive analysis of different parameters is still needed to fully understand metal speciation and bioavailability.
摘要：
雨水池广泛用于通过沉积颗粒和相关污染物来控制径流质量。它们的维护需要定期清除和处理积聚的材料。这就需要对物质危险性进行评估，包括金属污染造成的潜在危险。在这里，我们使用几种化学分析方法（总提取，顺序提取，薄膜DGT中的扩散梯度，和孔隙水提取），以考虑不同方法的互补性和可比性。在可能测量相似金属分数（DGT和顺序提取的分数1（吸附的和可交换的金属和碳酸盐）或孔隙水浓度）的分析之间没有发现明确的关系。烧失量(LOI)与本文开发的包含不同金属的环境风险指标(∑等级)有显著正相关,物种,和环境终点。观察到池塘之间的金属含量差异很大。由于聚类在不同的分析之间受到限制，仍然需要对不同参数进行综合分析，以充分了解金属形态和生物利用度。
