Application of the Peat Archive as Tool in Environmental Chemistry (APATEC)

在污染物大气沉积的潜在档案中，富营养化(雨养)沼泽和湖泊沉积物是最有希望的档案。沉积物剖面已经经常被用作环境化学中的工具；相比之下，泥炭档案到目前为止大多是在单一地点进行研究，或者只对个别污染物组进行分析。本项目的目的是展示和应用泥炭档案作为环境化学诊断工具的全部潜力。为此，我们将分析多种有机和无机化合物，即多环芳烃(PAHs)、多氯联苯(PCbs)和多溴联苯醚(PBDEs)以及微量金属，如砷、铬和汞。将加拿大东部的一个工业区作为确定的源区，并将确定污染物向位于源区上风向400公里横断面上的沼泽的时空沉积模式。结果将使用扩散和受体模型进行分析，污染物沉积数据将用于验证特定于化合物的传输参数，如到目前为止只能通过模型计算确定的特征旅行距离。

Among the potential archives for atmospheric deposition of contaminants, ombrotrophic (rain-fed) bogs and lake sediments are the most promising ones. Sediment profiles are already being regularly used as tool in environmental chemistry; in contrast, the peat archive has so far mostly been studied at single locations, or only individual groups of contaminants have been analyzed. Aim of this project is to demonstrate and apply the full potential of the peat archive as diagnostic tool in environmental chemistry. To these ends, we will analyze multiple classes of organic and inorganic compounds, i.e. polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl-ethers (PBDEs) together with trace metals like arsenic, chromium, and mercury. An industrial area in Eastern Canada will be taken as defined source area, and the spatio-temporal deposition pattern of contaminants to bogs located on a 400km-transect up- and downwind the source area will be determined. The results will be analyzed using dispersion and receptor modelling, and the contaminant deposition data will be used to validate compound-specific transport parameters like characteristic travel distances that so far have only been determined by model calculations.