Analysis of traces of precious metals in soils

土壤中痕量贵金属分析

• 批准号: 236178858
• 负责人: Professorin Dr. Kerstin Leopold
• 金额: --
• 依托单位: Institut für Analytische und Bioanalytische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/236178858?language=en
• 关键词: Analysis; traces; precious; metals; soils

Platinum group metals (PGMs) are used as active elements in car catalytic converters. Mainly highly dispersed platinum (Pt), palladium (Pd), and rhodium (Rh) nanoparticles (NPs) on ceramic support materials are applied and are partly emitted with the exhaust due to thermal and mechanic abrasion. Up to some 100 ng PGMs per kilometre can be emitted mainly as particular matter. Up to a third of the weight of these particles are smaller than 5 nm in size. The emitted particles settle beside roads and are infiltrated in so far unknown manner in roadside soils. The aim of the proposed project is to evaluate the transport and accumulation of PGM in soils. Thereby, it will be investigated in what depths the PGMs are transported in topsoil, in which soil types and layers they are accumulated and whether infiltration into ground water is to be estimated. Several samples from infiltration basins along roads with different traffic densities will be taken and Pd, Pt, and Rh concentrations will be determined in different soil depth. For this purpose a flow injection analysis system for pre-concentration of Pd traces will be further developed in order to analysis traces of Pt and Rh. This new method will be optimized and validated. The results of this projects will contribute to the risk assessment of PGM-NPs in the environment in general.

铂族金属 (PGM) 用作汽车催化转化器中的活性元素。主要采用陶瓷支撑材料上高度分散的铂 (Pt)、钯 (Pd) 和铑 (Rh) 纳米颗粒 (NP)，由于热和机械磨损，部分纳米颗粒随废气一起排放。每公里最多可排放约 100 纳克铂族金属，主要以特定物质的形式排放。这些颗粒的重量多达三分之一的尺寸小于 5 nm。排放的颗粒沉积在道路旁边，并以迄今为止未知的方式渗透到路边土壤中。拟议项目的目的是评估土壤中铂族金属的运输和积累。因此，将调查铂族金属在表土中的迁移深度、它们积累的土壤类型和层数以及是否会渗透到地下水中。将从不同交通密度的道路沿线的渗透池中采集多个样本，并测定不同土壤深度中的 Pd、Pt 和 Rh 浓度。为此，将进一步开发用于预浓缩 Pd 痕量的流动注射分析系统，以分析痕量 Pt 和 Rh。这种新方法将被优化和验证。该项目的结果将有助于总体环境中铂族金属纳米粒子的风险评估。

项目成果

Determination of traffic-related palladium in tunnel dust and roadside soil.

隧道灰尘和路边土壤中与交通相关的钯的测定。

• DOI: 10.1016/j.scitotenv.2017.01.048
• 发表时间: 2017-04-01
• 期刊: The Science of the total environment
• 作者: K. Leopold;K. Wörle;R. Schindl;L. Huber;M. Maier;M. Schuster
• 通讯作者: M. Schuster

Assessing the potential of inorganic anions (Cl-, NO3-, SO42- and PO43-) to increase the bioaccessibility of emitted palladium in the environment: Experimental studies with soils and a Pd model substance.

评估无机阴离子（Cl-、NO3-、SO42- 和 PO43-）增加环境中排放钯的生物可及性的潜力：土壤和钯模型物质的实验研究。

• DOI: 10.1016/j.envpol.2016.11.039
• 发表时间: 2024-09-13
• 期刊: Environmental pollution
• 影响因子: 8.9
• 作者: F. Zereini;C. Wiseman;Jana Poprizki;P. Albers;W. Schneider;K. Leopold
• 通讯作者: K. Leopold