Accumulation and Distribution of Pt and Pd in Roadside Dust, Soil and Vegetation in Bulgaria
The concentration of Pt and Pd in Bulgaria resulting from traffic pollution has never been investigated. Samples of roadside dust, soils and Taraxacum officinale, collected along highways, some major and secondary roads and a smelter region during the summer of 2012 are analyzed by ICP-MS. The comparison to literature values shows that the average concentrations in road dusts along Bulgarian roads are lower than the average for Pt and around the average for Pd. Hotspots with concentrations of Pd up to 800 ng/g and Pt up to 220 ng/g were established. The transfer factors (plant/soil) determined in the present study and the results form the analysis of washed and unwashed plant samples give a serious indication that a substantial part of Pt and Pd, released into the environment enters the plants.
KeywordsRoad Dust Transfer Factor Platinum Group Element Catalytic Converter Taraxacum Officinale
The present investigation was performed with the financial support of the National science fund, Ministry of education, youth and science, contract No DMU 03-54.
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