Assessing traffic and industrial contributions to ambient nitrogen dioxide and volatile organic compounds in a low pollution urban environment

Oiamo, Tor H.; Johnson, Markey; Tang, Kathy; Luginaah, Isaac

doi:10.1016/j.scitotenv.2015.05.032

Cited by 39 publications

(18 citation statements)

References 33 publications

(53 reference statements)

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“…T:B ratios can be useful to determine possible emission sources. T:B ratios between 1.5-4.3 are generally related to traffic and mobile sources (Miller et al, 2011;Oiamo et al, 2015;Schnitzhofer et al, 2008;Shaw et al, 2015). On the other hand, higher T:B ratios, up to 10, are related to higher toluene emissions coming from industrial and point source emissions (Buczynska et al, 2009;Miller et al, 2011;Morgan et al, 2015).…”

Section: Real Formaldehyde and Voc Ambient Air Concentrations In Wastmentioning

confidence: 99%

Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain)

Gallego

Roca

Perales

et al. 2016

Science of The Total Environment

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Emission factors of formaldehyde and VOCs were determined for two waste treatment plants (WTP) located in\ud the metropolitan area of Barcelona city. Formaldehyde emission factors were determined from the biogas engines\ud exhausts and the process chimneys (after the biofilter process), and VOC emission factors were determined\ud in the process chimneys. Formaldehyde and VOC were dynamically sampled usingDNPH-coated adsorbent tubes\ud with ozone scrubber and multi-sorbent bed tubes (Carbotrap, Carbopack X and Carboxen 569), respectively,\ud using portable pump equipment. Formaldehyde emission factors from biogas engines were found between\ud 0.001–0.04 g s-1. Additionally, formaldehyde and VOC emission factors from process chimneys were found to\ud be between 0.0002–0.003 g s-1 and 0.9 ± 0.3 g s-1, respectively. Employing real emission factors, the expected\ud concentrations derived from the WTPs in their nearby urban areaswere calculated using The Atmospheric Pollution\ud Model (TAPM, CSIRO), and impact maps were generated. On the other hand, ambient air formaldehyde and VOC\ud concentrations were determined in selected locations close to the evaluated waste treatment facilities using both\ud active and passive samplers, and were between 2.5±0.4–5.9±1.0 µgm-3and91±48–242±121 µgm-3, respectively.\ud The concentrations of formaldehyde and VOC derived exclusively from the waste treatment plants were\ud around 2% and 0.3 ± 0.9% of the total formaldehyde and VOC concentrations found in ambient air, respectively.Postprint (author's final draft

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Section: Real Formaldehyde and Voc Ambient Air Concentrations In Wastmentioning

confidence: 99%

Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain)

Gallego

Roca

Perales

et al. 2016

Science of The Total Environment

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“…Unfortunately, there are limited studies that have assessed noise and air pollution simultaneously (Babisch et al, 2014). Limited studies suggest the need for further research on the cumulative effects of both environmental stressors (Babisch et al, 2014;Oiamo et al, 2015;. The study found that respondents who live within a walkable distance to greenspace utilized it for physical activity.…”

Section: Discussionmentioning

confidence: 99%

“…Non-exhaust emissions including brake wear, tyre wear, and abrasion from road surfaces also contribute to poorer air quality levels (Thorpe & Harrison, 2008). Point source pollutants are still able to affect air quality even in cities that may not be heavily industrialized (Oiamo et al, 2015). Geographic location is a key contributor to ambient exposure to pollutants likely increasing the prevalence of hypertension Hollingworth et al, 2016;Poulter et al, 2015).…”

Section: Multiple Exposuresmentioning

confidence: 99%

A multiple regression analysis of cardiovascular health risks of exposure to environmental stressors in Toronto, Canada

Sadakhom¹

2021

Preprint

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This thesis examines the effects of exposure to ambient noise and air pollution and access to available greenspace on cardiovascular health in Toronto, Ontario. The study is focused around the population health approach which is used to understand the health of the whole population and to reduce health inequalities amongst population groups. The study utilizes population data from the 2012-2014 Canadian Community Health Survey (CCHS), air quality data from 2010-2014, noise exposure data from 2016, and the DMTI land use parks and recreation data to conduct a logistic regression analysis. The results from the analysis showed significant effects for noise when evaluated individually and measured cumulatively with air pollution and greenspace. Greenspace showed significant results when controlling for behavioural covariates, whereas air pollution displayed conflicting results for acute exposure. Future research on multiple environmental stressors should look to validate the importance of both ambient stressors through a longitudinal study.

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“…In recent years, pollution of the environment with nitrogen compounds has attracted considerable attentions [1]. Different compounds have nitrogen such as ammonia, nitrate, nitrite, and organic compounds [2].…”

Section: Introductionmentioning

confidence: 99%

Determination and validation of simultaneous derivatization and dispersive liquid‐liquid microextraction method for analysis of nitrate and nitrite contents as nitrate ions in onion and potato samples

khodaei

Mogaddam

Hamidi

et al. 2020

Separation Science Plus

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A simple and rapid method has been developed for the extraction of nitrate and nitrite from potato and onion samples using derivatization dispersive liquid‐liquid microextraction coupled with high‐performance liquid chromatography with ultraviolet detection. In this process nitrate ions are derivatized to 2,4‐dimethyl‐6‐nitrophenol using 2,4‐dimethyl phenol (as a derivatization agent) and the derivatized compound is concentrated using the microextraction method. The nitrite in the samples is rapidly oxidized to nitrate with potassium permanganate. After derivatization of nitrate ions under an acidic medium, the derivatized compound is extracted into carbon tetrachloride (as an extraction solvent) in the presence of methanol (as a dispersive solvent). Under optimum conditions, calibration graph was linear in the range of 31–50 000 ng/mL with r2 = 0.9997. The limits of detection and quantification were 9.1 and 31 ng/g, respectively. Extraction recovery was found to be 90%. Lastly, some real samples were analyzed and nitrite and nitrate contents were successfully determined. The developed method was compared with ISO 3365 method and the results showed that the proposed method is more efficient than it.

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Assessing traffic and industrial contributions to ambient nitrogen dioxide and volatile organic compounds in a low pollution urban environment

Cited by 39 publications

References 33 publications

Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain)

Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain)

A multiple regression analysis of cardiovascular health risks of exposure to environmental stressors in Toronto, Canada

Determination and validation of simultaneous derivatization and dispersive liquid‐liquid microextraction method for analysis of nitrate and nitrite contents as nitrate ions in onion and potato samples

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