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Assessing Human Carcinogenic Risk of Heavy Metal Exposure in a Tourist Area
Abstract:
Environmental safety in a tourism area is one of the basic security for tourists health. Thus, it is of great significance to assess the heavy metal-based potential health risk of a tourism area and its surrounding areas. This study mapped the carcinogenic risk of heavy metal polluted soil in a tourism area of XX City through procedures including on-site sampling, exposure dose estimation, toxicity assessment, carcinogenic risk calculation, and GIS (Geographic Information System) spatial interpolation. Results show that the soil of the tourism area was contaminated by heavy metals such as As, Cd. The maximum Cd concentration in soil was 41.60 times more than the second level of Soil Environmental Quality Standard of China (SEQSC). Meanwhile, the carcinogenic risk of heavy metal polluted soil is much higher than the international acceptable limits (i.e. 1.0E-06) with maximum risk value at 148.7E-06. Source contribution analysis also disclosed that the carcinogenic risk in the tourism area is mainly attributed to As. It therefore can be concluded that As and Cd polluted soil in the tourism area of XX City needs to be recovered immediately in order to protect tourists health.
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846-849
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August 2013
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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