scispace - formally typeset
Search or ask a question
Topic

Air pollutant concentrations

About: Air pollutant concentrations is a research topic. Over the lifetime, 1652 publications have been published within this topic receiving 36138 citations.


Papers
More filters
Journal Article

1 citations

01 Jan 2003
TL;DR: In this paper, an attempt has been made to assess the air pollution concentrations from road traffic by measuring CO, NOx, SO2 and SPM levels at the height of 3m from the road surface and analyzed in the Ambient Air Quality Monitoring Mobile Laboratory.
Abstract: An attempt has been made to assess the air pollution concentrations from road traffic. Traffic flows and air pollution concentrations of CO, NOx, SO2 and SPM were measured concurrently with vehicle speed and wind speed, during morning peak traffic hours from 8:00 am to 12:00 pm during from June to December 2001. Traffic flows were measured continuously during the morning peak traffic hours by video-technique at twelve major intersections and air pollutant levels were measured at the height of 3m from the road surface and analyzed in the Ambient Air Quality Monitoring Mobile Laboratory. From the statistical analysis, it is evident that the air pollutant concentration levels are closely related to the traffic flow and average vehicle speed and the relationships between the air pollutant concentrations and the traffic flow and average vehicle speed. It is evident that the traffic-generated air pollution in the study intersections were high and it may be attributed to the interrupted flow of traffic near the intersections due to frequent 'stop' and 'go' situations.

1 citations

Journal ArticleDOI
TL;DR: The total risk integrated methodology (TRIM) as mentioned in this paper is a risk assessment methodology that evaluates the residual health risks and ecological effects associated with exposure to toxic air pollutants from different source categories.
Abstract: The Clean Air Act Amendments of 1990 authorized the U.S. Environmental Protection Agency (EPA) to promulgate and implement technology-based standards on emissions of 188 hazardous air pollutants. These emission limits were to reflect the maximum achievable control technology (MACT) for categories of source. Although the MACT standards have resulted in a significant reduction of toxic air emissions, an assessment of the residual risk of toxic air emissions from MACT-regulated sources is needed to determine whether further controls are needed. This article discusses the problems associated with air pollution, and describes steps taken by the EPA to develop a risk assessment methodology that evaluates the residual health risks and ecological effects associated with exposure to toxic air pollutants from different source categories. The method, called total risk integrated methodology, depends upon a dispersion model to assess human exposure to toxic compounds.

1 citations

Journal ArticleDOI
TL;DR: Newly developed activity-based transport models have the ability to retain demographic and socio-economic data about the people making trips and performing activities in countries with high population density.
Abstract: ISEE-0069Background and Objective:Many studies on air pollution ignore the spatial and temporal variation in population density. Newly developed activity-based transport models have the ability to retain demographic and socio-economic data about the people making trips and performing activities in d

1 citations


Network Information
Related Topics (5)
Aerosol
33.8K papers, 1.1M citations
81% related
Environmental exposure
37.4K papers, 1.8M citations
79% related
Environmental pollution
100.4K papers, 1.1M citations
73% related
Greenhouse gas
44.9K papers, 1.3M citations
72% related
Global warming
36.6K papers, 1.6M citations
70% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202316
20229
2021100
202084
201972
201852