An efficient clean-up procedure coupled with a high performance liquid chromatography (HPLC) with on-line electrochemical (EC) reduction and fluorescence detection (FLD) was developed to quantify nitrated polycyclic aromatic hydrocarbons (NPAHs) in the airborne particulate. In this process, NPAHs were extracted ultrasonically followed by analysis by using a reversed phase column with an aqueous...

Fugitive dust (dust composed of natural materials, suspended into the air by human activities) is an air quality concern in many agricultural regions of the United States. Fugitive dust is generated almost everywhere by vehicles traveling on unpaved or sediment-covered roads and at construction and waste management sites (Cowherd et al., 1988). In the Southern High Plains of Texas and the Colum...

We show the effect of mobile source traffic pollution on infant mortality, both directly and through the channel of airborne particulate matter and carbon monoxide. We show higher levels of local traffic density lead to increased weekly infant mortality rates, and explore variation in effects by distance from traffic source, weather conditions, and infant subgroups. Direct effects of traffic ar...

The volatilization of NH3 from landapplied manure is not only a loss of valuable N, but also an air quality concern because NH3 plays a role in the formation of airborne particulate matter, which can be a health hazard. The relative differences in potential NH3 losses from land application of liquid dairy manure were determined via 3 methods: surface application, Aerway incorporation (shallow i...

Bioaerosols such as bacterial and fungal cells and their spores are along with non-biological particles part of indoor airborne particulate matter and have been related since a long time to health issues of human beings as well as flora, and fauna. To identify the different risks and to establish exposure thresholds, microbiology of air samples from a series of indoor environments must be chara...

Particulate matter is defined as a mixture of airborne solid particles and liquid droplets that can be inhaled and may cause serious health problems. Such elements are currently measured utilizing air quality monitoring devices that provide information on PM 10 and PM 2.5 levels giving information on pollution levels. However, many difficulties are encountered in the determination of nanosized ...

24 We have addressed the need for improved measurements of cloud condensation nuclei 25 (CCN) by developing a continuous-flow instrument that provides in situ measurements of CCN. 26 The design presented in this paper can operate between 0.1% and 3% supersaturation, at 27 sampling rates sufficient for airborne operation. The design constitutes a cylindrical continuous28 flow thermal-gradient di...

The term, biosolids, is generally used to refer to those waste products that have been stabilized by treatment of the sewage sludge for beneficial reuse through appropriate management (Davis, 2002). The agronomic and environmental benefits from the organic material and fertilizing elements contained in the biosolids are essential for maintaining soil fertility. This has been a major reason for ...

Air pollution, especially airborne particulate matter, is becoming a major problem in Chiang Mai. The present study reports findings on total suspended particulate matter (TSP) loading as well as its spatial and daily variation in Chiang Mai ambient air. Limited elemental analysis of airborne particulate matter was also performed. Samples were collected at four different sites, representative o...

The present paper proposes an analytical procedure for speciation analysis of inorganic antimony in airborne particulate matter using slurry sampling and hydride generation atomic absorption spectrometry (HG QT AAS). During the antimony determination, a quartz T tube cell was heated to approximately 900 C using air–acetylene flame. The optimization step was performed by employing full two-level...