Health implication among occupational exposed workers in a chromium alloy factory,Thailand

Abstract： This study was conducted to assess the occupational exposure and its health impact on the chromium alloyworkers. Environmental and biological monitoring, noise and audiometry measurements were done to evaluate theexposure levels in the factory. A total of 112 non-smoking workers were monitored from July 2001 to August 2002.The results showed that most of the chromium and lead exposures in the factory were below the ACGIH-TWA of 50μg/m3 for chromium( Ⅵ ) and OSHA-PEL of 50 μg/m3 for lead. The highest chromium(7.25 ± 0. 16 μg/m3 ) and lead(14.50 ± 0.29 μg/m3) concentrations were measured in the vibro room. The results indicated that elevatedconcentrations of chromium and lead were found in both blood and urine samples especially in those areas whichwere characterized by poor ventilation. The metal contents in blood and urine samples were significantly correlatedwith airborne metal concentrations in the factory. The result demonstrated that blood and urinary levels amongworkers were associated with increasing age and duration of exposure.The background noise level of the factory ranged from 67.6 to 89.2 dBA and was frequently higher than thethreshold limit value for noise(90 dBA). According to the audiometric test, the exposed workers showed signs ofnoise-induced hearing loss. Noise at work continued to be an important factor to hearing loss among exposedworkers. In our statistical analysis, a significant hearing loss was established on age effect and year of exposureamong the workforce. 作 者： S.Muttamara    SHING TET LEONG   作者單位： Research Lab Supervisor, Urban Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, G.P.O. Box 4, Klong Luang, Pathumthani 12120. Thailand  期 刊： 環境科學學報(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(2)  分類號： X131.1 X951  Keywords： chromium and lead exposure    electroplating    environmental and biological monitoring    audiometry measurement   

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