Risk assessment of human exposure to high toxic organohalogen compounds in area close to municipal solid waste incinerator

包括日本在内的许多国家的城市固体废物（MSW）焚烧炉的飞灰和烟气中都含有多氯代二苯并对二恶英（PCDD）和多氯代二苯并呋喃（pcdf）。因此，对垃圾焚烧厂附近居民健康状况的不良影响一直受到关注。事实上，间歇式垃圾焚烧炉附近的高致癌区已成为近年来人们关注的焦点；该居民区位于茨城县龙崎市焚化炉下风下1.2公里内，经流行病学调查，该地区的癌症死亡率为42%，而另一地区的癌症死亡率为21%。在本工作中，我们试图调查从焚化炉周围地区采集的土壤样本中二恶英类似物对土壤样本和血液样本的污染程度。结果，在焚化炉周围采集了61份土壤样本，对其二恶英类似物的污染水平进行了分析。背风侧G线上所有土壤样品中二恶英类似物的总浓度为5300 ~ 32200 pg/ G，平均为13900 pg/ G。进一步观察到，含二恶英类似物的粉煤灰落在G线上的两个特定区域，即G-0和G-2采样点（0.2 ~ 0.5 km）和G-6和G-7采样点（1.6 ~ 1.8km）。g -0和g - 1样品的TEQ浓度分别为252和211pg/g。这种令人难以置信的污染水平表明，G-0和g - 1采样点附近居民的健康处于极其危险的状态。另一方面，除了最近的E-0采样点外，迎风面E线上的所有样本都几乎没有污染。此外，我们还调查了34份居民血液样本的水平。结果发现，男性和女性的平均脂质水平分别为67.9 pgTEQ/g和85.1 pgTEQ/g，是日本普通人平均水平的3-4倍。因此，设施附近地区的这种严重人类污染被认为是由直接吸入烟气中的二恶英类似物或间接摄入被烟气污染的蔬菜造成的。少

Polychiorinated dibenzo-p-dioxins (PCDD) and polychiorinated dibenzofurans (PCDFs) have been contained in the fly ash and flue gases of municipal solid waste (MSW) incinerators of various countries, including Japan. Therefore, it has been concerned for bad influence of health condition of residents near by MSW incinerators. In fact, high cancer-causing area close to Batch-type MSW incinerator has become of major interest lately ; the residential area is located within 1.2 km under the downwind from the incinerator in Ryugasaki city of Ibaraki prefecture, and it is epidemiology investigated that the death rate from cancer in this area was 42%, comparison with that (21%) in the other area. In the present work, we tried to investigate the pollution levels of soil samples and blood samples by dioxin analogues in soil samples collected from its surrounding area of the incinerator.As a result, the analysis of pollution levels by dioxin analogues in 61 soil samples collected from its surround … More ing area of the incinerator was performed. The total concentration of dioxin analogues in all soil samples on G line of leeward side were heavily polluted with the levels of 5300 to 32200 pg/g on the average of 13900 pg/g. Further, it was observed that fly ash with dioxin analogues fell on the two specific area on G line, indicating sampling point of G-0 and G-2 (0.2 - 0.5 km), and sampling point of G-6 and G-7 (1.6- 1.8km). With respect to TEQ concentration, that in the samples of G-0 and G-l were 252 and 211pg/g, respectively. This incredible pollution levels indicated that the health of residents near sampling points of G-0 and G-l are extremely in a state of danger. On the other hand, it was clear that all samples on E line of the windward side except the nearest E-0 sampling point were little contamination. Further, we also surveyed the levels of 34 blood samples of the residents. As a result, it was observed that the average levels of men and women were 67.9 pgTEQ/g lipid and 85.1 pgTEQ/g lipid, respectively, indicating 3-4 fold on the average level of general person in Japan. Therefore, this heavily human pollution in area close to the facilities is considered to be brought by direct inhalation of dioxin analogues from flue gas, or by indirect intake of vegetables contaminated by flue gas. Less