Traffic-related platinum group elements (PGE) in soils from Mexico City

Morton, O.; Puchelt, H.; Hernández, E.; Lounejeva, E

doi:10.1016/s0375-6742(01)00163-7

Cited by 74 publications

(26 citation statements)

References 15 publications

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“…In contrast to previous studies that have suggested that following deposition autocatalyst derived PGE in soil are immobile (Cubelic et al, 1997;Zereini et al, 1997;Morton et al, 2001), the results of this study show that large seasonal variations in PGE concentrations, can occur during the year. Similarly to road dusts, at three of the four sampling locations large reductions in PGE levels (up to 67% for Pt) occur between autumn and winter.…”

Section: Roadside Soilscontrasting

confidence: 99%

“…In contrast to road dust, which is affected by a potentially large number of variables, roadside soil is thought to represent an accumulating matrix (Helmers, 2000). If, as suggested by a number of studies, the PGE are largely immobile in soils following deposition (Schäfer and Puchelt, 1998;Eckhardt et al, 2000;Zereini et al, 2000;Morton et al, 2001), accumulation resulting from the increasing number of vehicles fitted with catalytic converters should be identifiable in the temporal distribution of PGE in roadside soil. This paper, by examining the seasonal distribution of PGE in both road dusts and roadside soils at a number of locations over a twelve month period aims to elucidate the temporal distribution of autocatalyst derived PGE in multiple roadside media.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal variability of platinum, palladium and rhodium (PGE) levels in road dusts and roadside soils, perth, western australia

Whiteley

2005

Water Air Soil Pollut

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The emission of Platinum-group elements (PGE) from automobile catalytic converters has led to rapid increases in Pt, Pd and Rh concentrations in roadside media. This paper examines the temporal variability of PGE levels in road dusts and roadside soils on a seasonal basis over a 12 month period. Road dust and roadside soil samples were analysed by ICP-MS following microwave digestion and cation exchange. Concentrations of PGE in all road dust and roadside soil samples are elevated above local background concentrations with maximum levels of Pt − 440 ng g −1 , Rh − 91 ng g −1 and Pd − 440 ng g −1 . Systematic seasonal variations in PGE levels are observed in both sample types and the temporal distribution of PGE levels is affected by a number of factors including surface morphology and rainfall. PGE ratios in road dusts and soils are consistent with known catalytic converter composition throughout the sampling period indicating the PGE remain associated during mobilisation and transport.

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Section: Roadside Soilscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal variability of platinum, palladium and rhodium (PGE) levels in road dusts and roadside soils, perth, western australia

Whiteley

2005

Water Air Soil Pollut

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“…The range of Pt, Pd, and Rh concentrations from road dusts and roadside soils, 2.8-306 ng/g Pt, 1.8-18.2 ng/g Pd, and 5.7-64.6 ng/g Rh are within the range of values reported from roadside soils and road dusts in other European studies (Barefoot 1999;Petrucci et al 2000;Gomez et al 2001;Morton et al 2001;Gomez et al 2002). Lead levels (9-154 mg/kg) were also comparable to other studies indicating the influence of car traffic on its accumulation in roadside soils and dust (Schafer and Puchelt 1998;Morcelli et al 2005).…”

Section: Spatial Distributionsupporting

confidence: 84%

Survey of the Distribution and Time-Dependent Increase of Platinum-Group Element Accumulation Along Urban Roads in Ioannina (NW Greece)

Tsogas

Giokas

Vlessidis

et al. 2008

Water Air Soil Pollut

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The emission of platinum group elements (PGEs) from automobile catalytic converters has led to rapid increases in Pt, Pd, and Rh concentrations in roadside media. This article represents the first systematic study in Greece to assess PGE levels in road dust and roadside soil and their temporal variation on a seasonal basis over a 12-month period. Road dust and roadside soil samples were analyzed by graphite furnace atomic absorption spectrometry following microwave digestion. Concentrations of PGE in all samples were above the average upper crust values and local background levels, with maximum values of 306.4 ng/g Pt, 18.2 ng/g Pd, and 64.6 ng/g Rh in road dust and 225 ng/g Pt, 14.0 ng/g Pd, and 49.5 ng/g Rh in roadside soil. PGE ratios were not consistent with known catalytic converter composition throughout the sampling period reflecting the high emission of Rh from new catalytic converters. Spatial variations were influenced by various factors like driving style, matrix composition, diurnal change in traffic volume, and climatic conditions. With regard to seasonal variations, systematic changes in the temporal distribution of PGE levels were observed and followed a similar pattern between the two matrices. Except PGEs, Pb levels were determined, since it has been a typical indicator of vehicle-derived environmental lead pollution. The data indicate that despite the use of unleaded gasoline, traffic-related sources of Pb that induce levels above the local background have not been eliminated.

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“…For example, the PGE emissions from automotive catalytic converters under real-life driving conditions are higher than at constant speeds (Cubelic et al 1997;Helmers 1997;Zereini et al 1997;Ravindra et al 2004). Additionally, Morton et al (2001) suggested that PGE concentrations in soil are strongly dependent on traffic conditions; PGEs are released in greater quantities under high traffic densities than low traffic densities. Although the average speed on YH is lower than that on other roads, the traffic density of YH is much higher.…”

Section: Comparison Of Pge Concentrations and Distributionsmentioning

confidence: 99%

Spatial and temporal distribution of platinum group elements (PGEs) in roadside soils from Shanghai and Urumqi, China

et al. 2015

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Purpose The aims of this study are to elucidate the temporal trend, spatial distribution and the source of platinum group elements(PGEs) in roadside soil from Shanghai and Urumqi. Materials and methods The roadside surface soils from different types of road were collected in both Shanghai and Urumqi. The spatial and temporal distributions of PGEs in roadside soils were determined by ICP-MS. Results and discussion The average annual PGE concentrations from different types of roads in Shanghai occurred in the following order: highway > urban road, suggesting that total PGE concentrations were associated with driving speed. However, no significant difference in the concentrations of PGEs from different roads in Urumqi indicated that other factors also affected PGE distribution, such as driving conditions and traffic density. The temporal trends of PGEs were different between Shanghai and Urumqi. Levels of PGEs were low in spring and summer and high in autumn and winter in Shanghai. However, the trend was reverse in Urumqi because of the different forms of precipitation (rain vs. snow) and the occurrence of dry weather conditions in that city. Additionally, the highest concentration of Pt (23.5 ng g −1 ) was observed in winter in Urumqi, suggesting that coal combustion may be another important source of Pt in northern Chinese cities. Conclusions This study suggests that the spatiotemporal distribution of PGEs in soils is affected by the age of the catalytic converter used, traffic density, the type of catalytic converter used, and weather conditions. Although the PGEs were usually thought to be mainly from the abrasion and deterioration of catalytic converters, the coal combustion is also an important potential source of Pt, especially northern cities where coal combustion is high in winter.

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Traffic-related platinum group elements (PGE) in soils from Mexico City

Cited by 74 publications

References 15 publications

Seasonal variability of platinum, palladium and rhodium (PGE) levels in road dusts and roadside soils, perth, western australia

Seasonal variability of platinum, palladium and rhodium (PGE) levels in road dusts and roadside soils, perth, western australia

Survey of the Distribution and Time-Dependent Increase of Platinum-Group Element Accumulation Along Urban Roads in Ioannina (NW Greece)

Spatial and temporal distribution of platinum group elements (PGEs) in roadside soils from Shanghai and Urumqi, China

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