particulate matter Articles
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Particulate matter matters
“Dust in the wind” may be a great poetic analogy for a melancholy 80’s rock song, but in reality we generally don’t like dust. Large particles are filtered in the upper respiratory system, but the smaller the particle, the farther into the airways they penetrate. Dust particles are measured in micrometers (μm or um), also know as microns. Particles that are 10 ...
By Dyacon, Inc.
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USP 1788 2022 Revision Overview Frequently Asked Questions (FAQ)
In May 2021, a revision to USP 1788 Methods for Determination of Subvisible Particulate Matter was published in order to provide clarification and support of the information given in chapters USP 788 Particulate Matter in Injections, USP 789 Particulate Matter in Ophthalmic Solutions, and USP 787 Sub-visible Particulate Matter in Therapeutic Protein Injections. While the previos version of USP ...
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Expect Tighter Particulate Matter Standards
Particulate matter (PM) is a hot button issue poised to raise business costs and litigation. The U.S. Environmental Protection Agency (EPA) was recently due to issue final PM standard revisions. EPA last year proposed stronger National Ambient Air Quality Standards (NAAQSs) for fine PM (2.5 micrometers or less in diameter (PM2.5)) and the 24-hour PM2.5 standard. However, EPA sought to keep ...
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Measuring Opacity and Particulate Matter
Among the most obvious of hazardous air pollutants (HAPs), as it is readily visible by eye, is particulate matter (PM) - particles of smoke and dust. Small particlesbelow 2.5 μm in diameter are a special concern as they pose the greatest risk to health. Some PM emissions can be categorised as fugitive and are generally subject to work practice controls. However, the main sources of emissions ...
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Seasonal variation in suspended particulate matter vis-a-vis meteorological parameters at Kolar Gold Fields, India
Particulate matter concentrations and meteorological parameters were monitored to assess the impact of other industries likely to be set up at Kolar Gold Fields, India. Particulate matter less than 10 µm was the highest in winter due to the influence of gold mill tailings dumps while total suspended particulate matter was generally higher in spring probably due to the influence of uncovered area ...
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Particulate Matter monitoring – PM10
What is PM10? “PM”, Particulate Matter, is not a single pollutant, but refers to a complex mixture of solids and aerosols of varying shape, size, and chemical composition and may contain many chemical species like organic compounds, inorganic ions, metallic compounds, elementary carbon, etc. So, these atmospheric particles are defined by their diameter for air quality regulatory ...
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Particulate Matter monitoring – PM2.5
What is PM2.5? “PM”, Particulate Matter, is not a single pollutant, but refers to a complex mixture of solids and aerosols of varying shape, size, and chemical composition and may contain many chemical species like organic compounds, inorganic ions, metallic compounds, elementary carbon, etc. So, these atmospheric particles are defined by their diameter for air quality regulatory ...
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Lisbon air quality forecast using statistical methods
Ozone and particulate matter levels in Southern European countries are particularly high, exceeding the established limit values, and the information and alert thresholds (in the case of ozone). Therefore, it is relevant to develop a good prediction methodology for the concentrations of these pollutants. Statistical models based on Multiple Regression (MR) analysis and classification and ...
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Fine Particulate Series (Part 3): PM2.5 prevention of significant deterioration (i.e., Attainment) – What you need to know
U.S. EPA’s final rules (and policies) governing the implementation of the New Source Review (NSR) program for fine particulate matter (i.e., particulate matter with an aerodynamic diameter less than 2.5 microns, or PM2.5) are now being implemented. In the March 2009 issue of 4 The Record, ALL4’s PM2.5 Team discussed the technical basics of PM2.5. Then, in the April 2009 issue, ...
By All4 Inc.
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Bioaccumulation of hydrophobic organic chemicals by aquatic organisms: a workshop summary
Traditionally, regulatory approaches to the bioaccumulation of hydrophobic organic chemicals (HOCs) have emphasized the direct accumulation of these chemicals from solution across biological membranes, leading to the development of the bioconcentration factor as a measure of direct uptake of freely dissolved HOCs. However, an often larger fraction of the total amount of many HOCs in the water ...
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Frequency distribution of particulate matter (PM10) in urban environments
Hourly measurements of particulate matter with an aerodynamic diameter less than 10 µm (PM10) were recorded in Athens, Greece and Manchester, UK, for a period of one year. The lognormal, gamma and Weibull distributions were selected to fit the concentration frequency distribution of the measured PM10 data. Moreover, the statistics of Mean Bias Error (MBE), Root Mean Square Error (RMSE) and index ...
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Effects of meteorological conditions on concentration of air pollutants in Delhi
Air pollution in Delhi is a serious environmental problem. In this paper, the effects of meteorological conditions on local air quality are quantitatively assessed by determining the relationships between concentrations of Suspended Particulate Matter (SPM), Respirable Suspended Particulate Matter (RSPM), sulphur dioxide (SO2) and nitrogen dioxide (NO2) with meteorological parameters on monthly ...
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Modelling of wet deposition of atmospheric polycyclic aromatic hydrocarbons by the consecutive measurements in an urban area, Japan
The wet deposition for particulate matter (PM) and polycyclic aromatic hydrocarbons (PAHs) was modelled from the consecutive measurements of atmospheric concentration and wet deposition for particulate matter and PAHs in Higashi-Hiroshima city, Japan. In order to estimate the model in detail, the wet deposition was classified with that from gaseous and PM phase. The gaseous PAHs assumed to be ...
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Element patterns for particulate matter in stormwater effluent
Particulate matter in stormwater deteriorates the quality of receiving water and sediment. Characterization of stormwater particulate matter by means of its particle-associated element pattern provides an aid to determining its impact on receiving surface waters. During a 6 month measurement campaign, we determined particle-associated concentrations of major pollutants and rare earths for three ...
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Spatial and temporal differences of Particulate Matter in Berlin
Particulate Matter (PM) is still a problem in urban areas. The concentration of PM in Berlin and its variability is the subject of this study based on data of six official PM10 monitoring stations and a measuring program carried out by the Institute of Geography covering PM2.5 and coarse PM measurements at 19 sites, distinguished between traffic related and urban background sites. The impact of ...
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Modelling long-term averages of local ambient air pollution in Oslo, Norway: evaluation of nitrogen dioxide, PM10 and PM2.5
Large seasonal variations in climate as in Norway give challenges for air pollution modelling, especially of Particulate Matter (PM) that seldom has been evaluated. The EPISODE model calculated ambient concentrations of nitrogen dioxide (NO2), PM with diameter Keywords: evaluation, modelling, long-term averages, ambient air pollution, nitrogen dioxide, particulate matter, air quality, ...
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Use of abatement cost curves in developing environmental bubble policy for managing SPM in Jamshedpur region
This paper evaluates environmental bubble policy using abatement cost curves drawn for different abatement measures in Jamshedpur region. Surveys were conducted to estimate industrial emissions of suspended particulate matter (SPM) from different emitting sources in the region, and the characteristics of the existing and alternative abatement devices for each emitting source. The abatement cost ...
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Air pollution and restricted activity days among New Zealand school children and staff
Particulate Matter (PM) air pollution has been associated with a variety of adverse health effects. However, the influence of exposure to particulate pollution on non-notifiable health outcomes such as individual-level restricted activity is less well understood. Days absent from work or school were collected for 2257 students and teachers at eight secondary schools in Christchurch, New Zealand. ...
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Airborne chemical elements: correlation between atmospheric levels and lichen content
Concentrations of As, Cd, Co, Na, Sb, Se and Zn have been measured in atmospheric particulate matter and Parmelia sulcata Taylor transplants at a suburban and industrial area. Levels in particulate matter were found to be much lower than European target values, Californian Acute Inhalation Reference Exposure Levels and Ontario's Ambient Air Quality Criteria. Correlations between elemental content ...
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Influence of density flow on treated water turbidity in a sedimentation basin with inclined plate settler
The removal efficiency of particulate matter from a sedimentation basin with an inclined plate settler in drinking water treatment facilities is sometimes reduced by density flow caused by temperature increases in the raw water. In this study, the structure of the density flow and its prevention are investigated by means of three-dimensional computational fluid dynamics (CFD). The results of ...
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