Ozone Measurement with Passive Samplers:  Validation and Use for Ozone Pollution Assessment in Montpellier, France

Bernard, Nadine; Gerber, Mariette; Astre, C.; Saintot, M.

doi:10.1021/es971140k

Cited by 36 publications

(25 citation statements)

References 12 publications

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“…Since then, dangerously elevated tropospheric concentrations have been measured in Greece, Japan, Sydney, Jerusalem, Mexico City, and many other locations. 19,[25][26][27] Today, tropospheric O 3 concentrations are monitored to characterize the extent of air pollution in urban areas, where emissions from transportation and industrial plants are substantial. Anthropogenic O 3 is primarily generated from the reaction of atmospheric O 2 with groundstate O( 3 P) radicals that result from the photolytic dissociation of ambient NO 2 19,28 (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

et al. 2016

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Heterogeneous chemistry of the most important atmospheric oxidants, O 3 , NO 3 , and OH, plays a central role in regulating atmospheric gas concentrations, processing aerosols, and aging materials. Recent experimental and computational studies have begun to reveal the detailed reaction mechanisms and kinetics for gas-phase O 3 , NO 3 , and OH when they impinge on organic surfaces. Through new research approaches that merge the fields of traditional surface science with atmospheric chemistry, researchers are developing an understanding for how surface structure and functionality affect interfacial chemistry with this class of highly oxidizing pollutants. Together with future research initiatives, these studies will provide a more complete description of atmospheric chemistry and help others more accurately predict the properties of aerosols, the environmental impact of interfacial oxidation, and the concentrations of tropospheric gases.

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Section: Introductionmentioning

confidence: 99%

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

et al. 2016

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“…18 Several passive sampling methods for O 3 , for example, have been developed to measure personal and microenvironmental levels. [19][20][21][22] These are diffusion samplers that collect O 3 on a variety of substrates. Although passive samplers are small, lightweight, and easy to handle, they are not sensitive enough for short-term measurements.…”

Section: Introductionmentioning

confidence: 99%

Laboratory and Field Evaluation of Measurement Methods for One-Hour Exposures to O₃, PM₂₅, and CO

Chang¹,

Suh²,

Wolfson³

et al. 2001

Journal of the Air & Waste Management Association

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While researchers have linked acute (less than 12-hr) ambient O 3 , PM 2.5 , and CO concentrations to a variety of adverse health effects, few studies have characterized short-term exposures to these air pollutants, in part due to the lack of sensitive, accurate, and precise sampling technologies. In this paper, we present results from the laboratory and field evaluation of several new (or modified) samplers used in the "roll-around" system (RAS), which was developed to measure 1-hr O 3 , PM 2.5 , and CO exposures simultaneously. All the field evaluation data were collected during two sampling seasons: the summer of 1998 and the winter of 1999.To measure 1-hr O 3 exposures, a new active O 3 sampler was developed that uses two nitrite-coated filters to measure O 3 concentrations. Laboratory chamber tests found that the active O 3 sampler performed extremely well, with a collection efficiency of 0.96 that did not vary with temperature or relative humidity (RH). In field collocation comparisons with a reference UV photometric monitor, the active O 3 sampler had an effective collection efficiency ranging between 0.92 and 0.96 and a precision for 1-hr measurements ranging between 4 and 6 parts per billion (ppb). The limits of detection (LOD) of this method were 9 ppb-hr for the chamber tests and ~16 ppb-hr for the field comparison tests. PM 2.5 and CO concentrations were measured using modified continuous monitors-the DustTrak and the Langan, respectively. A size-selective inlet and a Nafion dryer were placed upstream of the DustTrak inlet to remove particles with aerodynamic diameters greater than 2.5 µm and to dry particles prior to the measurements, respectively. During the field validation tests, the DustTrak consistently reported higher PM 2.5 concentrations than those obtained by the collocated 12-hr PM 2.5 PEM samples, by approximately a factor of 2. After the DustTrak response was corrected (correction factor of 2.07 in the summer and 2.02 in the winter), measurements obtained using these methods agreed well with R 2 values of 0.87 in the summer and 0.81 in the winter. The results showed that the DustTrak can be used along with integrated measurements to measure the temporal and spatial variation in PM 2.5 exposures. Finally, during the field validation tests, CO concentrations measured using the Langan were strongly correlated with those obtained using the reference method when the CO levels were above the LOD of the instrument [~1 part per million (ppm)].

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“…Foi possível determinar em cada ponto da rede de amostragem a precisão dos amostradores passivos, definida como desvio padrão relativo para os amostradores expostos simultaneamente: 3,4 -13% na faixa de concentração de 2,0 -3,6 µg m -3 para SO 2 , 2,1 -9,8% na faixa de concentração de 2,3 -11 µg m -3 para NO 2 , e 3,3 -15% na faixa de concentração de 19 -27 µg m -3 para O 3 , valores estes compatíveis com citações na literatura sobre a precisão de medidas com este tipo de amostrador 8,[24][25][26][27] .…”

Section: Resultsunclassified

Monitoramento atmosférico passivo de SO2, NO2 e O3 em áreas urbanas e de influência industrial como prática de química ambiental para alunos de graduação

et al. 2006

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Recebido em 6/4/05; aceito em 4/10/05; publicado na web em 18/4/06 ATMOSPHERIC PASSIVE MONITORING OF SO 2 , NO 2 AND O 3 IN URBAN AREAS AND IN THOSE UNDER INDUSTRIAL INFLUENCE AS AN ENVIRONMENTAL CHEMISTRY EXPERIMENT FOR UNDERGRADUATE STUDENTS. This study is a result of undergraduate student participation in the Environmental Chemistry discipline provided by the Chemistry Institute/UFBA. The students were involved in the development of passive samplers, a project of the LAQUAM (Environmental Analytical Chemistry Laboratory). The students' residences and other neighborhoods were used to create a passive sampling network, allowing the measurement of atmospheric levels of pollutants in urban areas and in those under industrial influence. The assembly of the passive samplers, including impregnation of filters and chemical analysis were part of the students' practice tasks. The results were analyzed taking into consideration the Brazilian legislation.Keywords: passive sampling; air pollutants; environmental chemistry. INTRODUÇÃOA disciplina optativa "Química Ambiental", oferecida para alunos de Química no IQ/UFBA, aborda no seu conteúdo teórico a química das diferentes esferas ambientais. Para a parte prática da disciplina não é definido um programa específico, e sim, a participação dos alunos em um projeto de pesquisa ou estudo de caso que esteja sendo desenvolvido por uma equipe do IQ na área de meio ambiente, devendo ser examinado sob os aspectos químicos, integrando-os à obediência à legislação, aos efeitos sobre o meio ambiente e à saúde humana. Esta disciplina sempre foi oferecida, em semestres alternados para um número de alunos entre 4 -6, porém teve seu módulo (de 10 alunos) ultrapassado neste semestre, devido ao interesse despertado entre os estudantes quanto aos temas ambientais.Este trabalho apresenta o resultado da participação dos alunos dessa disciplina no referido semestre, junto à equipe do LAQUAM (Laboratório de Química Analítica Ambiental do Departamento de Química Analítica do IQ/UFBA) no monitoramento atmosférico de SO 2 , NO 2 e O 3 utilizando amostradores passivos, em áreas urbanas e com influência industrial.A técnica de monitoramento atmosférico mais difundida e aplicada é a ativa, principalmente através do uso de monitores contí-nuos que consistem de tecnologia complicada e cara. No entanto, o uso de amostradores passivos, dispositivos capazes de fixar gases ou vapores da atmosfera, sem envolver bombeamento artificial, tem se mostrado uma alternativa simples e de custo muito baixo. Aliado a isso, a experiência da equipe do LAQUAM no desenvolvimento de amostradores passivos 1-8 motivaram este trabalho, o qual produziu dados ambientais de importância e antes ainda não levantados simultaneamente em tal extensão espacial na região, para os gases medidos.Dióxido de enxofre (SO 2 ) é emitido para a atmosfera principalmente pela queima de combustíveis fósseis para aquecimento e produção de energia, e por fontes industriais como fundição de minéri-os não-ferrosos, além de outros processos, tais como...

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Ozone Measurement with Passive Samplers: Validation and Use for Ozone Pollution Assessment in Montpellier, France

Cited by 36 publications

References 12 publications

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

Laboratory and Field Evaluation of Measurement Methods for One-Hour Exposures to O₃, PM₂₅, and CO

Monitoramento atmosférico passivo de SO2, NO2 e O3 em áreas urbanas e de influência industrial como prática de química ambiental para alunos de graduação

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Ozone Measurement with Passive Samplers: Validation and Use for Ozone Pollution Assessment in Montpellier, France

Cited by 36 publications

References 12 publications

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O3, NO3, and OH, on organic surfaces

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O3, NO3, and OH, on organic surfaces

Laboratory and Field Evaluation of Measurement Methods for One-Hour Exposures to O3, PM25, and CO

Monitoramento atmosférico passivo de SO2, NO2 e O3 em áreas urbanas e de influência industrial como prática de química ambiental para alunos de graduação

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Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

Heterogeneous chemistry and reaction dynamics of the atmospheric oxidants, O₃, NO₃, and OH, on organic surfaces

Laboratory and Field Evaluation of Measurement Methods for One-Hour Exposures to O₃, PM₂₅, and CO