수은 고노출지역 주민의 수은노출요인과 노출량 변화에 관한 연구
Mercury Exposure Factors among Residents in the Highly Mercury Exposed Area, Seoksan-ri, Korea
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Objectives: The 2007 Korea National Survey for Environmental Pollutants in the Human Body found thehighest blood mercury levels nationwide among residents in Seoksan-ri, Goro-myeon, Gunwi-gun,Gyeonsangbuk-do. With the aim to reduce the blood mercury levels of residents in this region, we conductedthis study to identify the association between mercury exposure levels and shark meat consumption. Methods: This survey was conducted with 118 participants in Seoksan-ri before the Chuseok festival and 113residents were added afterwards. Information on participants was collected via questionnaires. Total mercuryconcentrations in biological samples were measured using a mercury analyzer with the gold-amalgamcollection method. Results: To identify this, we conducted mercury exposure level analysis before and after the Chuseokfestival and found that blood and urinary mercury levels after Chuseok (GM of 6.9 μg/L in blood and1.68 μg/g_cr in urine) were higher than those before (GM of 5.29 μg/L in blood and 1.44 μg/g_cr in urine). Thisarea maintains a custom of using shark meat as one of the ancestral rite foods, and the performance of such ritesand shark meat consumption have been identified as main sources of mercury exposure. Other than this,smoking, dental amalgam treatment and residential period in the area also contributed to an increase in mercuryexposure levels. On the other hand, recent consumption of oriental medicine and vaccination did not have asignificant influence on mercury levels. Conclusion: The results were attributed to the local custom of consuming shark meat with high mercuryconcentrations during rituals taking place during the festival and ancestral rites. Given that the blood mercurylevels in 23.2% of the residents exceeded the HBM II values recommended by the German Commission onHuman Biological Monitoring, it is suggested that further appropriate actions and follow-up measures be takento reduce the mercury exposure levels of the residents that exceeded the reference values.
Abstract
Objectives: The 2007 Korea National Survey for Environmental Pollutants in the Human Body found thehighest blood mercury levels nationwide among residents in Seoksan-ri, Goro-myeon, Gunwi-gun,Gyeonsangbuk-do. With the aim to reduce the blood mercury levels of residents in this region, we conductedthis study to identify the association between mercury exposure levels and shark meat consumption. Methods: This survey was conducted with 118 participants in Seoksan-ri before the Chuseok festival and 113residents were added afterwards. Information on participants was collected via questionnaires. Total mercuryconcentrations in biological samples were measured using a mercury analyzer with the gold-amalgamcollection method. Results: To identify this, we conducted mercury exposure level analysis before and after the Chuseokfestival and found that blood and urinary mercury levels after Chuseok (GM of 6.9 μg/L in blood and1.68 μg/g_cr in urine) were higher than those before (GM of 5.29 μg/L in blood and 1.44 μg/g_cr in urine). Thisarea maintains a custom of using shark meat as one of the ancestral rite foods, and the performance of such ritesand shark meat consumption have been identified as main sources of mercury exposure. Other than this,smoking, dental amalgam treatment and residential period in the area also contributed to an increase in mercuryexposure levels. On the other hand, recent consumption of oriental medicine and vaccination did not have asignificant influence on mercury levels. Conclusion: The results were attributed to the local custom of consuming shark meat with high mercuryconcentrations during rituals taking place during the festival and ancestral rites. Given that the blood mercurylevels in 23.2% of the residents exceeded the HBM II values recommended by the German Commission onHuman Biological Monitoring, it is suggested that further appropriate actions and follow-up measures be takento reduce the mercury exposure levels of the residents that exceeded the reference values.
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