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氟化物是毒性较大的大气污染物之一。虽然大气中氟化物污染的程度总的不如二氧化硫严重,但氟化物对植物的毒性却比二氧化硫要大10—100倍,空气中含有1—5ppb的氟化物即可使某些敏感植物受害①。凡生产过程中使用水晶石、含氟磷矿和萤石等原料的工厂(如铝厂、磷肥厂、钢铁厂、玻璃厂、搪瓷厂等)以及使用氢氟酸的工厂和有机氟合成工厂等都有氟化物排放污染大气的可能。煤也含有40—300ppm的氟,在燃烧过程中排入大气。伤害植物的氟化物主要有氟化
Fluoride is one of the more toxic air pollutants. Although the overall level of fluoride contamination in the atmosphere is not as severe as that of sulfur dioxide, fluoride is 10 to 100 times more toxic to plants than sulfur dioxide and 1-5 ppb of fluoride in the air can cause damage to some sensitive plants. All factories (such as aluminum plants, phosphate fertilizer plants, steel mills, glass factories, enamel mills, etc.) that use raw materials such as crystal rock, fluorophosphate and fluorite in the production process, and hydrofluoric acid plants and organic fluorine synthesis plants Fluoride emissions have the potential to pollute the atmosphere. Coal also contains 40-300 ppm of fluorine, which is released into the atmosphere during combustion. The fluoride that hurts plants is mainly fluorinated