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Risk Analysis of Volatile Organic Compounds Through Daily Life Cycle in the Industrial City in Korea

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Water, Air and Soil Pollution: Focus

Abstract

This study analyzed the risk of exposure to volatile organic compounds (VOCs) through a study of activity patterns in the Korean industrial city, Ulsan. The daily life cycle patterns(LCPs) of 331 people in Ulsan were surveyed and the average LCPs in Ulsan were obtained by statistical analysis. Nine to twelve personal air samples of VOC exposure at the breathing zones were collected at each LCP. This included hours for sleeping,cooking and eating, going to and from work, working, participating in field or outdoor activities, reading, watchingTV, and shopping. The components and concentrations of the collected VOCs were identified by a Gas Chromatography-MassDetector (GC-MS). The overall reproducibility of all GC analytical procedures of the simultaneously collected duplicatesample pairs represented a mean of percent differences rangingfrom about 9 to 13%. For the general population of Ulsan, thecarcinogenic and non-carcinogenic risk of exposure to theVOCs during the LCPs was evaluated. The carcinogenic riskwas analyzed using both the chronic daily exposure orlifetime average daily exposure (CDI) and the cancerpotency factor. The non-carcinogenic risk was analyzedusing both the CDI and the chronic reference dose.The major chemical forms of the identified VOCs were oxidized forms (43%), aliphatic alkanes (29%) and aromatics (15%). Even though the highest total exposure strength per unit time of each activity was observed during shopping, the highest totalamount of exposure to VOCs was identified as the exposure duringwork. The total carcinogenic risk of exposure to the carcinogenicVOCs through daily life cycle in Ulsan was 2.0 × 10-4which is substantially exceeding the permissible carcinogenicrisk level, 10-5 ∼10-6. The carcinogenic riskduring most of the life cycle activities, except forreading, mainly performed indoors, was higher than that ofthe activities performed outdoors. The carcinogenic risk bybenzene exposure was about 56% (time weighted average) ofthe total carcinogenic risk by the exposure to thecarcinogenic VOCs. During cooking and eating, shopping andout door activities, however, the carcinogenic risk by theexposure to chlorinated compounds like chloroform exceededthe exposure to benzene. The overall hazard index (non-carcinogenic risk) by a chronic exposure to carcinogenicand non-carcinogenic VOCs through daily life cycle in Ulsanwas evaluated as 3.91 × 10-1, which is much less than1.0 considered as a hazard level to human health, and thusit seems likely not to produce a severe health hazard.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, University of Ulsan, Ulsan, Korea

    Byeong-Kyu Lee

  2. Department of Civil and Environmental Engineering, University of Ulsan, Ulsan, Korea

    Jungbum Cho

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  1. Byeong-Kyu Lee
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  2. Jungbum Cho
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Correspondence to Byeong-Kyu Lee.

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Lee, BK., Cho, J. Risk Analysis of Volatile Organic Compounds Through Daily Life Cycle in the Industrial City in Korea. Water, Air, & Soil Pollution: Focus 2, 155–171 (2002). https://doi.org/10.1023/A:1021375015671

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