摘要:二恶英是一类氯代含氧三环芳烃类化合物,包括多氯代二苯并二恶英PCDD和多氯代二苯并呋喃PCDF,其中PCDD有75个异构体,PCDF有135种.在这210种化合物中,有17种(2,3,7,8位全部被氯原子取代的)被认为是对人类健康有巨大的危害.其中2,3,7,8-四氯代二苯并-对-二恶英(2,3,7,8-TCDD)是目前已知化合物中毒性最大的,是氰化钾的50~100倍[1].从二恶英的毒理学来看,它不仅具有致癌性,而且具有免疫和生殖毒性,作为内分泌干扰物可能造成男性雌性化.其主要表现为致死作用和废物综合症、胸腺萎缩、氯痤疮、肝毒性、免疫毒性、生殖毒性、发育毒性和致畸性、致癌性[2,3].
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