Adherence patterns of diarrheagenic Escherichia coli strains isolated from children with gastrointestinal diarrhea and matched controls in a Hep-2 cell adhesion assay
Journal Title: Journal of Advances in Environmental Health Research (JAEHR) - Year 2016, Vol 4, Issue 3
Abstract
In the present study, carbon species including organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) concentration in PM2.5 were assessed at an urban site of Tehran, Iran during March to June 2014. The PM2.5 samples were collected using an frmOMNITM Ambient Air Sampler. Thermal gravimetric analysis (TGA) was used to analyze OC and EC. The results showed that PM2.5 concentrations varied from 14.32 to 74.45 μg/m3 with an average value of 41.39 μg/m3. The results also showed that carbon species varied from 5.52 to 23.21 (15.35 ± 6.05) μg/m3 for OC and 1.03 to 4.16 (2.25 ± 0.65) μg/m3 for EC. As the findings indicated, the mean PM2.5 level in the sampling area was higher than the annual average determined by the United States Environmental Protection Agency (EPA) as the ambient air quality standard. On average, carbon species (OC, EC, and WSOC) account for almost 60% of PM2.5 mass in the atmospheric outflow from a downwind site. OC and EC concentrations in atmospheric PM2.5 collected at the sampling site were lower than the values reported for other urban areas with high or medium vehicular traffic and/or industrial sources. Moreover, the results obtained in this research can provide a valuable data base for health risk evaluation of the local residents and prioritization of control actions.
Authors and Affiliations
Zohreh Khodaei, Enayatollah Kalantar, Mahbobeh Mehrabani, Parisa Darabi, Afshin Maleki
Keywords
Related Articles
- EP ID EP424107
- DOI 10.22102/jaehr.2016.42222
- Views 104
- Downloads 0
Spatial epidemiology and pattern analysis of childhood cancers in Tehran, Iran
Identification of cancer clusters may have an important value to the study of disease etiology in cancer surveillance. We aimed to determine the spatial pattern of childhood cancer cases (CCCs) from 2007 to 2009 in Tehra...
Removal of cesium through adsorption from aqueous solutions: a systematic review
Cesium radioactive isotopes (134Cs and 137Cs) are dangerous to human health due to their long half-life and high solubility in water. Nuclear experiments, wars, and nuclear plant accidents have been the main sources of C...
Simulating green tax effects on pollution reduction, mortality and morbidity costs in Iran
The direct association between air pollution and morbidity and mortality rates has been proved. This major environmental risk factor has been mainly due to extensive use of fossil fuels. Increasing pollution caused by fo...
Ecological potential assessment of soil in agricultural lands in Hamedan Province, Iran, using geographic information system
The main purpose of the present study was to assess the ecological potential of agricultural soils using geographic information system (GIS). This research was conducted during 2014 in Hamedan Province, Iran. A cross-sec...
Potential human health risk assessment of heavy metals in the flesh of mallard and pochard in the South Eastern Caspian Sea region of Iran
Every year, migratory waterfowl are hunted and consumed by people in Golestan Province of Iran. Due to the heavy metal contamination of wintering habitats, an estimation of the human health risks associated with the cons...