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二噁英的研究进展及影响(综述) 被引量:5

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摘要 二(口恶)英是指一类氯代含氧三环芳烃类化合物,确切的术语应为多氯代二苯并二(口恶)英PCDD和氯代二苯并呋喃PCDF,而PCDD有75个异构体,PCDF有135个异构体。它是非人为生产,没有任何用途伴随存在于各种环境介质的一类环境持续存在的污染物,因其毒性极高,世界卫生组织规定人体暂定每日允许摄入量为1~4 pg/kgBW。 二(口恶)英这类氯代化合物的化学特性相似,均为固体,沸点与熔点较高,具有亲脂性而不溶于水,PCDD、PCDF在环境中存在具有其共同特征:a.热稳定性,它加热到800℃才降解,大量破坏时需超过1000℃;b.低挥发性。
作者 张兵
出处 《职业与健康》 CAS 2001年第1期46-47,共2页 Occupation and Health
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