环境卫生
环境卫生(environmental health) 以人类及其周围的环境为对象,阐明
环境因素对人群健康影响的发生与发展规 律,并通过识别、评价、利用或控制与人 群健康有关的各种环境因素,达到保护和 促进人群健康的目的。
大多数对人类健康是必需的
清洁的空气、水、土壤、食物、适量的太 阳辐射等。
Particulate matter (8%): • nicotine • tar(焦油) (Carcinogenic PAHs)
Metals: cadmium, lead
More than 4,500 compounds have been identified from burning tobacco.
A SUFFERING FAMILY There are thousands of such families in Bhopal. Each family member who has survived the tragedy - father, mother, children suffers the same physical problems. Their eyes water, their lungs are permanently damaged and they always feel breathless.
主要有醛、酮、烃、脂肪酸、 醇、芳香族化合物、酯、内酯、 杂环化合物等。在烹调油烟中 还发现挥发性亚硝胺等已知
致癌物。
衰变体系
放射性污染物
Rn 222
218Po 214Po 214Bi 214Pb 206Pb
衰变过程中的产物总称为氡子体 (radon daughters)
每次衰变过程都有α、β、γ辐射