Ali Akbar Kakooei

University of Tehran, Teheran, Tehrān, Iran

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Publications (4)0.87 Total impact

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    Hossein Kakooei, Mahmod Sameti, Ali Akbar Kakooei
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    ABSTRACT: Occupational exposure to asbestos fiber and total dust of workers of a major brake lining manufacture plant in a developing country were examined and compared with those in developed countries. Time weighted average of total dust and asbestos fiber concentration in the potential sources of exposure were monitored. All personal air sampling were collected on membrane filters and analyzed by phase contrast optical microscopy (PCM) for comparison with the occupational safety and health administration (OSHA) permissible exposure limit (PEL) of 0.1 f/cc, 8-h time--weighted average. This study demonstrates that routine mixing, polishing and beveling process in the brake lining production can result in elevated levels of airborne asbestos. Greater releases of airborne asbestos were observed during mixing process and mixer machine. The results also showed that the employees working in the process had the exposure to total dust concentrations ranging from 2.08 to 16.32 mg/m(3) that is higher than OSHA, recommendation. According to OSHA definition of fibers, it has been indicated that from 3,000 counted particles, 90% of particles are in the form of non-fiber and reaming have fiber-shaped. The particle analyze gives the geometric mean diameter as 6.02 mum, and also indicated that the arithmetic mean of the number distribution for the particle population was 8.4 mum. Approximately 60.4% of the counted fibers were lower than 10 mum in length, from which only 8% consists of fibers (>5 mum in length). In conclusion, the analysis showed a presence in the air of only chrysotile asbestos and an absence of other types of asbestos. During an 8-h shift, the average asbestos fiber exposure (0.78 f/cc) were 7.8 time in excess of OSHA PEL. Additional studies in occupational exposure to asbestos are needed.
    Industrial Health 01/2008; 45(6):787-92. · 0.87 Impact Factor
  • Kakooei Hossein, Ali Akbar Kakooei
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    ABSTRACT: Short-term exposure sampling of fine particle (PM<sub>2.5</sub>), coarse particle (PM<sub>10</sub>) and Total Suspended Particle (TSP) has been carried out at different located in Tehran, the capital of Iran. Samples were collected from summer, to winter of 2005, in North (N), South (S), West (W), East (E) and center of Tehran. The daily monitoring site was located 2 m above ground near highway and main streets. One hundred and seventeen simultaneous sampling of the airborne particle matter (MS) were collected using a direct-reading instrument, the TSI Inc. model 8520 Dusttrack aerosol monitor. The 24 h average PM<sub>10</sub>, PM<sub>2.5</sub> and TSP concentrations during the sampling period were 122.1, 24.3 and 239.8 µg mG<sup>-3</sup> respectively. Daily PM<sub>10</sub> and TSP concentrations exceeded the National Ambient Air Quality Standard (NAAQS) of USA, for approximately 25.7 and 38.9% of the sampling days, respectively. Compared with NAAQS, the average PM<sub>2.5</sub> measured concentration (24.3 µg mG<sup>-3</sup>) in Tehran was lower. The results also showed that for north of Tehran, the average particle matter concentrations (153.1 µg mG<sup>-3</sup> for PM<sub>10</sub>, 32.4 µg mG<sup>-3</sup> for PM<sub>2.5</sub> and 269.6 µg mG<sup>-3</sup> for TSP) were higher than other area. The average PM<sub>2.5</sub>/PM<sub>10</sub> ratio for the five area were 0.19 compared to 0.15 to 0.25 reported by EPA. Three season monitoring data indicated that the average concentrations of PM<sub>10</sub> in the winter (December to March), summer (Jun to July) and fall (November) were 116.4, 101.9 and 150.9 µg mG<sup>-3</sup>, respectively. PM<sub>2.5</sub> levels in the seasons also were 10.9, 21.32 and 12 µg mG<sup>-3</sup>, respectively. These results clearly confirmed the non-parametric analysis (Kruskal-Wallis test) PM<sub>10</sub> (p< 0.001), PM<sub>2.5</sub> (p< 0.001) and TSP (p = 0.114).
    Journal of Applied Sciences. 01/2007;
  • Hossein Kakooei, Ali Akbar Kakooei
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    ABSTRACT: Short-term exposure sampling of fine particle (PM2.5), coarse particle (PM10) and Total Suspended Particle (TSP) has been carried out at different located in Tehran, the capital of Iran. Samples were collected from summer, to winter of 2005, in North (N), South (S), West (W), East (E) and center of Tehran. The daily monitoring site was located 2 m above ground near highway and main streets. One hundred and seventeen simultaneous sampling of the airborne particle matter (MS) were collected using a direct-reading instrument, the TSI Inc. model 8520 Dusttrack aerosol monitor. The 24 h average PM10, PM2.5 and TSP concentrations during the sampling period were 122.1, 24.3 and 239.8 µg mG-3 respectively. Daily PM10 and TSP concentrations exceeded the National Ambient Air Quality Standard (NAAQS) of USA, for approximately 25.7 and 38.9% of the sampling days, respectively. Compared with NAAQS, the average PM2.5 measured concentration (24.3 µg mG-3) in Tehran was lower. The results also showed that for north of Tehran, the average particle matter concentrations (153.1 µg mG-3 for PM10, 32.4 µg mG-3 for PM2.5 and 269.6 µg mG-3 for TSP) were higher than other area. The average PM2.5/PM10 ratio for the five area were 0.19 compared to 0.15 to 0.25 reported by EPA. Three season monitoring data indicated that the average concentrations of PM10 in the winter (December to March), summer (Jun to July) and fall (November) were 116.4, 101.9 and 150.9 µg mG-3, respectively. PM2.5 levels in the seasons also were 10.9, 21.32 and 12 µg mG-3, respectively. These results clearly confirmed the non-parametric analysis (Kruskal-Wallis test) PM10 (p< 0.001), PM2.5 (p< 0.001) and TSP (p = 0.114).
    Journal of Applied Sciences. 01/2007; 7(20):3081-3085.
  • H Kakooei, M Sameti, A A Kakooei
    Epidemiology. 01/2006; 17.