A field evaluation of a SO2 passive sampler in tropical industrial and urban air

Cruz, Lícia Passos dos Santos; Campos, Vânia Palmeira; Silva, Adriana M. C.; Tavares, Tania Mascarenhas

doi:10.1016/j.atmosenv.2004.07.022

Cited by 27 publications

(19 citation statements)

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“…For HNO 3 , SO 2 , NO 2 and NH 3 we cite Ferm and Rodhe (1997) and Ferm et al (2005). Cruz et al (2004) validate SO 2 passive samplers for tropical industrial and urban air in South America. Passive samplers have been also extensively used in tropical Asia and South America (Carmichael et al, , 2003Gupta et al, 2003;Tidblad et al, 2007).…”

Section: Determination Of the L/a Parametermentioning

confidence: 99%

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

et al. 2010

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Abstract. In this paper we present the long term monitoring of ambient gaseous concentrations within the framework of the IDAF (IGAC-DEBITS-AFRICA) program. This study proposes for the first time an analysis of long-term inorganic gas concentrations (1998 to 2007) of SO 2 , NO 2 , HNO 3 , NH 3 and O 3 , determined using passive samplers at seven remote sites in West and Central Africa. Sites are representative of several African ecosystems and are located along a transect from dry savannas-wet savannas-forests with sites at Banizoumbou (Niger), Katibougou and Agoufou (Mali), Djougou (Benin), Lamto (Cote d'Ivoire), Zoetele (Cameroon) and Bomassa (Congo). The strict control of measurement techniques as well as the validation and inter-comparison studies conducted with the IDAF passive samplers assure the quality and accuracy of the measurements. For each type of African ecosystem, the long term data series have been studied to document the levels of surface gaseous concentrations. The seasonal and interannual variability have also been analyzed as a function of emission source variations. We compared the measured West and Central African gas Correspondence to: M. Adon (adonatma@yahoo.fr) concentrations to results obtained in other parts of the world. Results show that the annual mean concentrations of NO 2 , NH 3 , HNO 3 measured in dry savannas are higher than those measured in wet savannas and forests that have quite similar concentrations. Annual mean NO 2 concentrations vary from 0.9±0.2 in forests to 2.4±0.4 ppb in the dry savannas, NH 3 from 3.9±1.4 to 7.4±0.8 ppb and HNO 3 from 0.2±0.1 to 0.5±0.2 ppb. Annual mean O 3 and SO 2 concentrations are lower for all ecosystems and range from 4.0±0.4 to 14.0±2.8 and from 0.3±0.1 to 1.0±0.2 ppb, respectively. A focus on the processes involved in gas emissions from dry savannas is presented in this work, providing explanations for the high concentrations of all gases measured at the three dry savannas sites. At these sites, seasonal concentrations of all gases are higher in the wet season. Conversely, concentrations are higher in the dry season in the wet savannas. In forested regions, we measure no significant difference between wet and dry seasons. This unique database of long term gases concentrations monitoring is available at:

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Section: Determination Of the L/a Parametermentioning

confidence: 99%

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

et al. 2010

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“…The use of passive samplers at a network of sampling locations has received increasing attention in the last decade for determining temporal and spatial distributions of key air pollutants. Passive samplers are simple devices that are capable of capturing gas pollutants from the atmosphere, without an air pump or a flow meter for sample collection (Cruz et al, 2004). The sampling rate is controlled by a physical process, which can be molecular diffusion through a static air layer or permeation through a membrane filter (Brown et al, 1984).…”

Section: Introductionmentioning

confidence: 99%

Comparison of NO2 and SO2 Measurements Using Different Passive Samplers in Tropical Environment

Balasubramanian

et al. 2014

Aerosol Air Qual. Res.

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This report describes the results of an inter-comparison study conducted for the sampling and analysis of NO 2 and SO 2 by using different type of passive samplers in tropical urban environment. For this purpose, field experiments were proposed to be conducted by two round robin tests from Sept. 2007 to Aug. 2008 in Singapore. A set of different types of passive samplers have been exposed to ambient air at atmospheric research station in National University of Singapore along with suitable active samplers (as reference method) for a sufficient period of time (3-4 weeks). Annular denuder system (ADS) active sampling data showed that NO 2 concentration level (23.8-28.1 ppb) in Singapore was slightly higher than the WHO guideline but SO 2 concentration (12.5-14.9 ppb) was approximately twice the value of WHO guideline. For the two round robin tests, accuracy analysis by using active sampling data as reference demonstrated that grand mean values from passive air sampling (PAS) and active sampler average concentrations, for both NO 2 and SO 2 , are in close agreement with each other. Precision evaluation based on the triplicate samplers co-located at the same sampling siteSingapore showed that most of the passive samplers applied here had repeatability. ANOVA statistical analysis also showed no significant difference between the measurement data obtained by different type of passive samplers for both round robin tests in Singapore.

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“…Passive samplers can be used for indoors and outdoors monitoring in all environment (Salem et al, 2009) and provide good results (Gorecki and Namiesnik, 2002). They are suitable to investigate the spatial distribution of gaseous pollutants and establish the air quality monitoring network (Carmichael et al, 20 2003;Cox, 2003;Cruz et al, 2004). INDAAF passive samplers are small, silent and reliable.…”

Section: Sampling Proceduresmentioning

confidence: 99%

Spatial distribution of gaseous pollutants (NO2, SO2, NH3, HNO3 and O3) in Abidjan, Cote d'Ivoire

Bahino

Yoboue

Galy‐Lacaux

et al. 2017

Preprint

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Abstract. This work is part of the DACCIWA FP7 program (Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa 10 ) in the framework of the work package 2 « Air Pollution and Health ». This study aims to characterize urban air pollution levels through the measurement of NO2, SO2, NH3, HNO3 and O3 in Abidjan, the economic capital of Cote d'Ivoire. Gases measurements are performed using INDAAF (International Network to study Deposition and Atmospheric chemistry in AFrica) passive samplers exposed in duplicate for two weeks periods. We performed an intensive measurement campaign in Abidjan from December 15 th , 2015 to February 16 th , 2016 during the dry season. Twenty-one sites were selected in the district 15 of Abidjan to be representative of various anthropogenic and natural sources of air pollution in the city. We collected 672 samples of gas during this period. Results from the intensive campaign show that gas concentrations are strongly linked to pollution sources nearby and show a high spatial variability on the different sites of Abidjan. However, three gases present relative higher levels of concentrations at all the sites: NH3, NO2 and O3. NH3 average concentrations vary between 9.1 ± 1.7 ppb at a suburban site and 102.1 ± 9.1ppb at a domestic fires site. NO2 mean concentration vary from 2.7 ± 0.1 ppb at a 20 suburban site to 25.0 ± 1.7 ppb at an industrial site. We measured the two highest O3 concentration on the two coastal sites located in the southeast of the city with average concentration of 19.1 ± 1.7 ppb and 18.8 ± 3.0 ppb respectively for Gonzagueville and the Felix Houphouet-Boigny international airport. The SO2 average concentration never exceeds 7.2 ± 1.2 ppb at all the sites with 71.5 % of the sampling sites presenting concentrations ranged between 0.4 ppb and 1.9 ppb. The HNO3 average concentration is comprised between 0.2 ppb and 1.4 ppb. All these results were combined with meteorological 25 parameters to provide the first mapping of gaseous pollutants at the scale of the district of Abidjan using the geostatistical analysis (ArcGIS software). Spatial distribution results emphasize the importance of the domestic fires source and the significant impact of the traffic emissions at the scale of the city. In addition, we propose in this work a first overview of gaseous SO2 and NO2 concentrations at the scale of several African cities from literature compared to our measurements. The daily SO2 standard of WHO is exceeded in most of the cities reported in the overview where concentrations range from 0.2 30 µg.m -3 -3662 µg.m -3 . Annual NO2 concentrations ranged from 2 µg.m -3 -175 µg.m -3 are lower than the WHO threshold. As a conclusion, this study constitutes an original database to characterize urban air pollution and a first attempt toward a spatialization of the pollution levels at the scale of the metropolis of Abidjan. This work should draw the attention of the African public authorities to the necessity of air quality monitoring network in order to (1) to define national standar...

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A field evaluation of a SO2 passive sampler in tropical industrial and urban air

Cited by 27 publications

References 11 publications

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

Comparison of NO2 and SO2 Measurements Using Different Passive Samplers in Tropical Environment

Spatial distribution of gaseous pollutants (NO<sub>2</sub>, SO<sub>2</sub>, NH<sub>3</sub>, HNO<sub>3</sub> and O<sub>3</sub>) in Abidjan, Cote d'Ivoire

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A field evaluation of a SO2 passive sampler in tropical industrial and urban air

Cited by 27 publications

References 11 publications

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers

Comparison of NO2 and SO2 Measurements Using Different Passive Samplers in Tropical Environment

Spatial distribution of gaseous pollutants (NO&lt;sub&gt;2&lt;/sub&gt;, SO&lt;sub&gt;2&lt;/sub&gt;, NH&lt;sub&gt;3&lt;/sub&gt;, HNO&lt;sub&gt;3&lt;/sub&gt; and O&lt;sub&gt;3&lt;/sub&gt;) in Abidjan, Cote d'Ivoire

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Spatial distribution of gaseous pollutants (NO<sub>2</sub>, SO<sub>2</sub>, NH<sub>3</sub>, HNO<sub>3</sub> and O<sub>3</sub>) in Abidjan, Cote d'Ivoire