Gas Stations
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Determination and Risk Assessment of Formaldehyde and Acetaldehyde in the Ambient Air of Gas Stations in Salvador, Bahia, Brazil
Formaldehyde (FA) and acetaldehyde (AA) were determined in the ambient air of five gas stations (GS) in the city of Salvador, Bahia State, Brazil, using three passive samplers exposed simultaneously for 8 h and analysis by high-performance liquid chromatography-ultraviolet detection (HPLC-UV). The concentration ranges found were 3.31-5.78 µg m−3 for FA an
J. Braz. Chem. Soc.. Publicado em: 2020-06
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2. Analysis of accessibility from collection and delivery points: towards the sustainability of the e-commerce delivery
Resumo O pick-up point (PP) é uma alternativa às entregas em casa e uma importante oportunidade para reduzir as entregas fracassadas dentro das áreas urbanas. Neste estudo, propomos analisar a acessibilidade dos PPs localizados em estabelecimentos comerciais (farmácias, postos de gasolina, correios, supermercados e shopping centers) considerados mais atr
urbe, Rev. Bras. Gest. Urbana. Publicado em: 03/10/2019
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3. Distribution and Sources of Aliphatic and Polycyclic Aromatic Hydrocarbons in Surface Sediments of Itajaí-Açu Estuarine System in Brazil
The Itajaí-Açu estuarine system, located in southern Brazil, has great economic importance due to the presence of two ports (Itajaí and Navegantes). This system is affected by industrial and dredging activities, which can cause the remobilization of pollutants accumulated over time in the sediment. In this context, hydrocarbons were assessed in twelve sur
J. Braz. Chem. Soc.. Publicado em: 2017-04
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4. Determination of Polycyclic Aromatic Hydrocarbons in Groundwater Samples by Gas Chromatography-Mass Spectrometry After Pre-Concentration Using Cloud‑Point Extraction with Surfactant Derivatization
A cloud-point extraction (CPE) method using the surfactant (30)p-tert-octylphenol polyoxyethylene (OPEO30) was proposed as the preceding step for the determination of polycyclic aromatic hydrocarbons (PAHs) by gas chromatography-mass spectrometry (GC-MS). Given the need for surfactant derivatization before the chromatographic analysis, the reaction condition
J. Braz. Chem. Soc.. Publicado em: 2015-05
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5. DETERMINAÇÃO DO TEOR DE BIODIESEL EM DIESEL EMPREGANDO O ENSAIO COLORIMÉTRICO DO ÁCIDO HIDROXÂMICO
The aim of this paper was to use colorimetric assays for hydroxamic acid to quantify the biodiesel content in diesel and compare it with the traditional method (infrared spectroscopy, using the EN 14078 method). Samples were prepared from B2 to B10 with two kinds of diesel - S500 (red) and S50 (yellow) - to obtain two calibration curves. Through statistical
Quím. Nova. Publicado em: 2015-05
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6. KIT COLORIMÉTRICO PARA DETECÇÃO DE METANOL EM ETANOL COMBUSTÍVEL PARA O MONITORAMENTO DA QUALIDADE DE COMBUSTÍVEIS
A colorimetric kit for methanol detection in ethanol-containing fuels and ease of use in the field was developed and tested. The analysis can detect the presence of methanol in fuels when exceeding specification (0.5% v/v) in about 20 min and its simple instrumentation does not require a specialist. The kit method was successfully validated at gas stations l
Quím. Nova. Publicado em: 2015-02
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7. Effects of gas types and models on optimized gas fuelling station reservoir's pressure
There are similar algorithms and infrastructure for storing gas fuels at CNG (Compressed Natural Gas) and CHG (Compressed Hydrogen Gas) fuelling stations. In these stations, the fuels are usually stored in the cascade storage system to utilize the stations more efficiently. The cascade storage system generally divides into three reservoirs, commonly termed l
Braz. J. Chem. Eng.. Publicado em: 2013-06
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8. Métodos para análises de HPA e BTEX em águas subterrâneas de postos de revenda de combustíveis: um estudo de caso em Campo Grande, MS, Brasil
Two methods using headspace solid-phase microextraction and gas chromatography - mass spectrometry were developed for the determination of polycyclic aromatic hydrocarbons (PAH) and BTEX. Best results were obtained using DVB/CAR/PDMS fiber, with 10 min extraction at 25 °C and 0.15 min desorption at 260 °C (BTEX), and PDMS/DVB fiber, with 60 min extraction
Quím. Nova. Publicado em: 2013
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9. Distribuição de combustíveis no estado de São Paulo : estruturas de governança e oportunismo / Distribuição de combustíveis no estado de São Paulo : estruturas de governança e oportunismo
This work is directed to the study of transactions governance adopted by fuel distributors in the State of Sao Paulo with retail market sellers or gas stations. The applied theoretical approach lies on studies of New Institutional Economics, favoring the study of Transaction Costs Economics, using attributes of transactions defined by Williansom (1979) and o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2012
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10. Análise da vulnerabilidade dos recursos hídricos na região urbana de São Carlos (SP) por vazamentos em postos de combustíveis, utilizando o método GOD e avaliação dos condicionantes geotécnicos / Analysis of the vulnerability of water resources in the urban area of São Carlos (SP) for leaks at gas stations, using the GOD method and assessment of geotechnical conditions
O constante avanço econômico e tecnológico que estamos vivendo, nos dias de hoje possui como uma das mais marcantes características o aumento na demanda de combustíveis para diversos usos. Fato que pode ser preocupante do ponto de vista ambiental, onde estes combustíveis representam grandes potenciais poluidores. Na área de estudos (região urbana de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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11. Introdução de misturas de GNV e hidrogênio (Hidrano) em veículos convencionais no Brasil e seus impactos econômicos, ambientais e energéticos / Introduction of CNG and hydrogen (HCNG) for conventional vehicles and its economic, environmental and energy impacts
Several strategies have been proposed to introduce hydrogen in the economy specifically in the transport sector in order to reduce environmental impacts of conventional fuels. One of the strategies implies in adding hydrogen to compressed natural gas (HCNG), making use of the existing refueling stations and natural gas fleet. Thus the costs and time for the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2012
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12. Audição periférica e central de frentistas / Central and peripheral hearing of gas stations attendants
O presente trabalho teve como objetivo avaliar o sistema auditivo periférico e central de frentistas. Trata-se de um estudo prospectivo, onde foram avaliados frentistas de três postos de gasolina da cidade de Santa Maria. Após a adequação dos critérios de inclusão, a amostra totalizou 24 sujeitos. Um grupo controle, composto por 24 sujeitos, foi utili
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/10/2011