文档介绍：持续性有机污染物的全球污染
与健康风险 anic Pollutants: Global Pollution and Health Risk   广州医学院预防医学教研室 雷毅雄教授
A group of chemicals known as persistent toxic substances (PTS) is now receiving world-wide attention. These chemicals are toxic, persistent in the environment, umulates in fatty tissues, biomagnifies through the food web and has a tendency for long-range transport. They can produce long-term contamination of our environment and due to their endocrine disrupting capabilities, they can cause acute and chronic toxicity to humans.
A sub-group of PTS are anic pollutants (POPs)
一、POPs的定义、特性与危害
二、国内外对POPs的研究进展
三、POPs污染现状与人群风险
一、POPs的定义、特性与危害
1、POPs的定义
持久性有机污染物(anic pollutants, POPs)是一系列在环境中长期残留和长距离迁移,具有脂溶性和生物蓄积性,对人类和野生动植物有高毒的含碳化合物。
2、POPs具有五个显著特性
* 持久性/长期残留性( Persistent in
the environment)
* 生物蓄积性(umulates in fatty
tissues)
* 半挥发性(Semi-volatility)
* 高毒性(High-toxic)
* 长距离迁移性(Long-range transport)
3、POPs的来源与种类
杀虫剂(Pesticides)
POPs 工业化学品(Industrial
chemicals)
生产中的副产品(Unintended
by-products)
不完全燃烧与热解的产物如城市垃圾、医院废弃物、木材及废家具的焚烧、汽车尾气、有色金属生产和铸造、炼焦、发电、水泥、石灰、砖、陶瓷等工业的废气,都是城市大气POPs的主要来源。符合POPs定义的物质有数千种之多,它们通常是具有某些特殊化学结构的同系物或异构体。