Topsoil pollution in highway medians in the State of São Paulo (Brazil): determination of potentially toxic elements using synchrotron radiation total reflection X-ray fluorescence

Canteras, Felippe Benavente; Oliveira, Bruna Fernanda Faria; Moreira, Silvana

doi:10.1007/s11356-019-05425-2

Cited by 17 publications

(8 citation statements)

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“…Thereafter, the samples were cooled to room temperature (25 °C), and the volumes were made up to 25 mL with deionized water. 22…”

Section: Component Analysismentioning

confidence: 99%

“…The samples were prepared in triplicate to minimize contamination errors. 22 After this procedure, the final solution was stirred for homogenization, and 10 μL solution was pipetted into ultrapure quartz supports and dried using an infrared lamp under a laminar flow fume hood. After drying, the samples were stored in petri dishes to avoid contact with the external environment and possible contamination.…”

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confidence: 99%

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Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors

et al. 2022

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This study aimed to assess the microstructure, chemical composition, and image quality of different photostimulable phosphor plates (PSP). Four PSP systems, Express ® , Digora ® , VistaScan ® , and Apixia, ® were assessed. Five radiographs of a homogeneous acrylic phantom were obtained with the PSP of each system, to acquire a total of 20 images. The images were objectively evaluated for uniformity using mean grey and standard deviation (SD) of their grey values. PSP receptors were analyzed using scanning electron microscopy (SEM) to determine the thickness of the granule layer and the size of the granules. The chemical composition of the PSP receptors was analyzed using total reflection X-ray fluorescence (TXRF). VistaScan showed more uniform and higher density images than the other tested systems (p < 0.05), as well as the lowest SD of grey values (p < 0.05).Regarding the microstructure of the receptors, Digora and VistaScan had thicker granule layers than Express and Apixia, and VistaScan had smaller granules than Digora and Express (p < 0.05). Fourteen chemical elements were detected in the receptors, with barium being the element with the highest concentration in all PSP systems. The microstructure, chemical composition, and image quality varied among all four PSP receptors studied. VistaScan receptors showed the smallest variation in granule size, one of the thickest granule layers, and the most uniform and least noisy images.

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“…Thereafter, the samples were cooled to room temperature (25 °C), and the volumes were made up to 25 mL with deionized water. 22…”

Section: Component Analysismentioning

confidence: 99%

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confidence: 99%

Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors

et al. 2022

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“…The estimated fleet of the city was 864,782 vehicles by 2016 (IBGE, 2019a). Among the main highways that provide access to Campinas, Anhanguera (SP330) and Bandeirantes (SP348) stand out and form the main economic corridor of the country (Figure 1) (Canteras et al, 2019). Considering the segments closer to the city of Campinas, Anhanguera and Bandeirantes have, respectively, average daily traffic of 36,422 and 120,140 vehicles, considering both directions (DER, 2019).…”

Section: Campinasmentioning

confidence: 99%

Brazilian truckers’ strike and particulate matter (PM10) concentration: Temporal trend and time series models

Nogarotto

Canteras

Pozza

2022

Rev. Bras. Ciênc. Ambient.

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High particulate matter (PM) emissions from vehicular traffic impact air quality in urban areas. In 2018, a truckers’ strike interrupted some of the services in Brazil, leading to a fuel outage in several cities that significantly reduced the flow of vehicles. This study evaluated air quality during the strike in two cities (Limeira and Campinas) in Southeastern Brazil. PM10 concentration was analyzed in the periods before (BTS — 05/01/2018 to 05/22/2018), during (DTS — 05/23/2018 to 05/30/2018), and after (ATS — 05/31/2018 to 06/30/2018) the strike using the Theil-Sen method and the Autoregressive Integrated Moving Average model with Exogenous Variables (ARIMAX). A reduction in the PM daily mean concentration in both cities occurred during the strike. Considering the daily peak time of vehicular flow (6:00 p.m.), the PM10 concentration was 20% higher in the BTS period compared to the DTS period for both cities. In comparison, the ATS period showed concentrations 17% (Limeira) and 7% (Campinas) higher when compared with the DTS period. The variations were statistically significant based on the time series models, and the influences of wind speed, rainfall on the sampling day and the day before sampling, and weekends were also evaluated. It was also possible to verify the contribution of the truckers’ strike to the PM10concentration in the two cities evaluated. In Limeira, truck traffic had a greater influence on the concentration of PM10, while in Campinas, the contribution of trucks was like that of light vehicles. Based on the variation of the PM10 concentration, the influence of changes in vehicle emission dynamics, one of the main sources of emission in the regions studied, was observed. The results indicate that restricting vehicular traffic had an immediate impact on improving air quality. Therefore, public investment in other types of transport and traffic control policies are suggested.

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“…In Latin America and Brazil, no storm water runoff regulation is required at the moment. Even in São Paulo, a megacity, with a car eet of 30,778,960 thousand units (IBGE, 2020), where the tra c-derived pollution is considered signi cant by several authors, no runoff regulation is in power (Canteras et al, 2019;CETESB, 2020a;de Miranda et al, 2012;Lange et al, 2018), CETESB -Companhia Ambiental do Estado de São Paulo, Environmental Agency of São Paulo State, monitors the air and water quality, however, the stormwater or drainage runoff has no systematic monitoring (CETESB, 2021; CETESB, 2021). In Brazil, the accelerated urban growth and the absence of permanent environmental planning contributed to an increase in surface runoff and ash ood events.…”

Section: Introductionmentioning

confidence: 99%

Contamination characteristics in runoff fractions from a nuclear facility in São Paulo/Brazil

Faustino

Monteiro

Lima

et al. 2023

Preprint

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The stormwater runoff may act as a nonpoint pollutant source and in urban environments contributes to aquatic ecosystem quality decay. Here, we examined the runoff characteristics on the export of total solids and total metals, as well as pH and conductivity responses during the rainfall evolution. In 2017 and 2018, 12 rain events in 4 sampling stations were monitored at a parking lot located at Nuclear and Energy Research Institute (IPEN/CNEN) in São Paulo/Brazil. A 4-chamber integrated collector allowed the sequential/temporal runoff evolution assessment. The runoff was composed of Ca > K > Mg > Si > Al > Fe > Na > Zn > Mn > Sr > Ti > Mo > V > Cu > B > Pb > Ni > Ce > Sb > Cr > La > U > Th > Cd. Total solids, Al and Fe exceed Brazilian water quality standards. Principal components analysis identified the elemental clusters linked to the facility activity, soil, traffic/atmospheric related deposition. Our results show that the runoff characteristics could be differentiated by pollutant source. Seasonal variation, rain event intensity, air mass from oceanic or continental origin, spatial distribution inside the monitoring area and the intensity of the first flush must be consider to disentangle the elemental clusters and pollution source contributions. In winter, continental air masses were associated with higher concentrations heavy metals in the surface runoff. Spatial changes with no seasonal variation were observed for U, Th, La and Ce.

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Topsoil pollution in highway medians in the State of São Paulo (Brazil): determination of potentially toxic elements using synchrotron radiation total reflection X-ray fluorescence

Cited by 17 publications

References 58 publications

Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors

Evaluation of the microstructure, chemical composition, and image quality of different PSP receptors

Brazilian truckers’ strike and particulate matter (PM10) concentration: Temporal trend and time series models

Contamination characteristics in runoff fractions from a nuclear facility in São Paulo/Brazil

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