30 documents found, page 1 of 3
The Updated Brazilian National Air Quality Standards: A Critical Review
Siciliano,Bruno; Dantas,Guilherme; Silva,Cleyton M. da; Arbilla,GracielaOn November 19, 2018, 30 years after establishment, the updated Brazilian National Air Quality Standards (NAQS) were published. These NAQS were formulated as a fundamental part and instrument of the National Program for the Control of Air Quality and considering, as a reference, the World Health Organization Air Quality Guidelines, published in 2005. An important contribution is the inclusion of PM2.5 (particul...
Fatores de emissão de compostos carbonílicos medidos em um túnel do Rio de Jane...
Almeida,Jose Claudino Souza; Braga,Andre Luis do Prado; Bastos,Leonardo; Arbilla,Graciela; Martins,Eduardo MonteiroReal-world vehicle emissions of carbonyls compounds (CC) were determined at the Rebouças Tunnel, Rio de Janeiro (Brazil). The tunnel is a two-bore tunnel with three lanes in each direction and has a length of 2840 m, divided in two sections. On average, approximately 5,000 vehicles (95% light duty) were passing the tunnel per hour. Sixteen samples were simultaneously collected 500 and 1500 m inside from the ent...
Radionuclídeos como marcadores de um novo tempo: o Antropoceno
Silva,Cleyton Martins da; Arbilla,Graciela; Machado,Wilson; Soares,RicardoOn May 2019, the members of the Anthropocene Working Group completed a binding vote to affirm some of the key questions that have been agreed in 2016: the Anthropocene should be considered as a formal chronostratigraphic unit, defined by a Global Boundary Stratotype Section and Point (GSSP), using one of the stratigraphic signals around the mid-twentieth century of the Common Era. The fallout from nuclear weapo...
MODELOS FOTOQUÍMICOS SIMPLES COMO FERRAMENTA PARA O GERENCIAMENTO DA QUALIDADE ...
Silva,Cleyton M. da; Siciliano,Bruno; Carvalho,Nicole J. de; Corrêa,Sergio M.; Arbilla,GracielaAtmospheric processes in an urban scenario are very complex and depend on meteorological parameters, emission, transport and deposition processes and the chemical mechanism. Simple air quality models can be used to understand the main aspects of ozone formation and provide information to adopt pollution control strategies. In this work the detailed simulation of ozone concentrations using the air quality model ...
Efeitos da gestão de mobilidade urbana para os Jogos Olímpicos sobre a qualidad...
Gomes,Ingrid do Amaral; Carvalho,Nicole Jannarella de; Silva,Rafael Ramos da; Arbilla,Graciela; Silva,Cleyton Martins daResumo Neste estudo, foram analisados os possíveis efeitos das obras de mobilidade urbana, realizadas no bairro Centro da cidade do Rio de Janeiro, sobre a qualidade do ar. Foram tratados estatisticamente os dados de concentração obtidos na Estação de Monitoramento do Largo da Carioca para os poluentes PM10, CO, O3 e SO2, assim como os parâmetros meteorológicos, para os meses de julho e agosto de 2015 e 2016, r...
Air Quality Indexes in the City of Rio de Janeiro During the 2016 Olympic and P...
Tsuruta,Felipe; Carvalho,Nicole J. de; Silva,Cleyton M. da; Arbilla,GracielaIn this work, the air quality indexes (AQIs) determined in Rio de Janeiro from July to September 2016, before and during the Summer Olympic and Paralympic Games, in the monitoring stations operated by the Municipal Secretariat of the Environment, were compiled and analyzed. Only four automatic monitoring stations determined all the Brazilian criteria pollutants (smog, total particulate matter, PM10 (particulate...
Air Quality in the Maracanã and Deodoro Zones During the Rio 2016 Olympic Games
Bezerra,Carolina A.; Carvalho,Nicole J. de; Geraldino,Claudio G. P.; Silva,Cleyton M. da; Arbilla,GracielaThe air quality during the Summer 2016 Olympic Games in two Olympic zones, Maracanã (Tijuca) and Deodoro, was studied. Volatile organic compounds (VOCs) were collected and analyzed following method TO-15 (United States Environmental Protection Agency), during and in the days after the Games. The total VOC (C4-C12) concentrations were 39.2-160.9 and 36.6-191.4 µg m-3 for Tijuca and Deodoro, respectively. These c...
Rate Coefficient for the Reaction of Cl Atoms with cis-3-Hexene at 296 ± 2 K
Barbosa,Thaís S.; Barrera,Javier A.; Toro,Rafael Jara; Bauerfeldt,Glauco F.; Arbilla,Graciela; Lane,Silvia I.The rate coefficient of the cis-3-hexene + Cl atoms reaction at 296 ± 2 K and 750 ± 10 Torr was determined using the relative rate technique. The reaction was investigated using an 80 L Teflon reaction bag and a gas chromatograph coupled with flame-ionization detection. Chlorine atoms were produced by the photolysis of trichloroacetyl chloride. No previous experimental data was available in the literature, to t...
Determination of CO2, CH4 and N2O: a Case Study for the City of Rio de Janeiro ...
Silva,Cleyton M.; Corrêa,Sergio M.; Arbilla,GracielaA new sampling method using polypropylene syringes and chemical analysis by gas chromatography was proposed and applied to determine CO2, CH4 and N2O. The samples' stability was evaluated and compared with the stability of the samples in stainless steel canisters and Tedlar® bags. This methodology was applied to a case study in the urban area of the city of Rio de Janeiro, Brazil. In 2012, annual averages of 50...
AVALIAÇÃO DA EFICIÊNCIA DO MÉTODO TO-15 PARA DETERMINAÇÃO DE COMPOSTOS ORGÂNICO...
Silva,Cleyton Martins da; Souza,Elaine Cesar C. A.; Silva,Luane Lima da; Oliveira,Rafael Lopes; Arbilla,Graciela; Corrêa,Sergio MachadoThe efficiency of U.S.EPA TO-15 Method was evaluated under typical conditions of an urban environment with natural and anthropic emission sources. The performance criteria which should be met for a system to qualify, were fulfilled: a detection limit of ≤0.2 ng for all target compounds, replicate precision for a calibration standard and ambient samples within 20%. The stability of the target compounds during st...