Nanoparticles - tool and target in environmental analysis: Trace metal analysis and speciation of mercury and palladium
Fakultät für Chemie
In analytical chemistry nanomaterials are interesting in two points of view: First, the application of nanomaterials provides new or enhanced techniques; and second, with the increasing emission of anthropogenic nanoparticles (NPs) their tracking in the environment becomes more and more important. In this work NPs have been addressed as both, a tool to develop a new method for mercury (Hg) trace analysis and a target in the analysis of traffic-related palladium (Pd) emission. Hg is one the most critical environmental pollutants and its monitoring is mandatory. In this work new analytical methodologies for total Hg analysis and speciation in natural waters were developed. For the first time catalytically active nanogold as solid phase extractant for Hg species is described. Thereby, high analytical performance, routine applicability, and sustainability were achieved. Furthermore, a new method for Pd trace analysis was developed, which provides, for the first time, routine analysis in environmental samples. Monitoring of Pd in urban demonstrates its accumulation in the environment and and confirms its high mobility in soils. Pd-NPs exposure studies on biota revealed that they are uptaken by plant roots and pollen, and that nanoparticulate Pd0 exposure has worse effects than PdII exposure.