Determination of traffic-related palladium in tunnel dust and roadside soil.
Determination of traffic-related palladium in tunnel dust and roadside soil.
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DOI：
10.1016/j.scitotenv.2017.01.048
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发表时间：
2017-04
期刊：
影响因子：
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通讯作者：
K. Leopold;K. Wörle;R. Schindl;L. Huber;M. Maier;M. Schuster
中科院分区：
文献类型：
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作者：
K. Leopold;K. Wörle;R. Schindl;L. Huber;M. Maier;M. Schuster
路边灰尘和土壤样品收集在不同的地点在该地区的乌尔姆和慕尼黑在德国。道路灰尘样品收集在隧道中，交通相关的灰尘是受大气条件的影响较小。土壤样品采取了不同距离的高速公路，地区和区域道路与不同的交通密度与钻棒。为了获得钯（Pd）分布的深度剖面，将30 cm长的土壤圆柱体分成四个部分。测定样品中的Pd的总pests进行配体辅助的选择性分离和富集Pd（II），使用固相萃取，然后由高分辨率连续源石墨炉光谱法。通过加标土壤样品的回收率实验，使用经认证的参比物质BCR-723公路隧道粉尘成功验证了分析方法。道路灰尘中的平均Pd浓度为311 μg kg− 1，表层土壤中的最大Pd浓度为193 μg kg− 1。钯的深度剖面显示，钯迁移到更深的土壤层，即使在25至30厘米的深度，钯浓度为19 μg kg− 1，证明了钯的高流动性。不同的因素，如交通密度和年龄的土壤进行了讨论的背景下，发现钯深度剖面。
Roadside dust and soil samples were collected at different sites in the area of Ulm and Munich in Germany. Road dust samples were collected in tunnels where the traffic-related dust is less influenced by atmospheric conditions. Soil samples were taken with a drill bar at varying distances to motorways, district and regional roads with different traffic densities. The soil cylinders of 30 cm length were divided into four sections in order to obtain depth profiles for palladium (Pd) distribution. Determination of Pd in total digests of the samples was performed by ligand-assisted selective separation and preconcentration of Pd(II) using solid phase extraction followed by high-resolution continuum source graphite furnace spectrometry. The analytical procedure was successfully validated using the certified reference materialBCR-723 Road Tunnel Dustand by recovery experiments in spiked soil samples. The average Pd concentration found in the road dusts was 311 μg kg− 1, the maximum Pd concentration in the topsoil layer was 193 μg kg− 1. Pd depth profiles reveal transportation of Pd into deeper soil layers, where even at a depth of 25 to 30 cm a Pd concentration of 19 μg kg− 1was found, proving the high mobility of Pd. Different factors like traffic density and age of the soils are discussed in the context of the found Pd depth profiles.