Ouellet M
INRS-Eau, Université de Québec, Sainte-Foy, Canada.
Sci Total Environ. 1987 Oct;66:65-72. doi: 10.1016/0048-9697(87)90078-7.
Fluorides in surface snowcover originating from two old Canadian aluminium smelters were studied over an area of 4500 km2, in March 1978 and 1984. During that period, the completion of a depollution programme within the smelters reduced the airborne gaseous emissions from 1.5 to 0.7 kg Ft-1 of metal produced. In 1978, more than 3000 km2 of the regional area was contaminated by industrial fluorides with snowborne concentrations of up to 13 mg l-1. Reduction of the gaseous fluoride emissions, concomitant with a substantial reduction of the total particulate emissions, have greatly decreased the snowborne fluoride contamination so that the maximum concentration of fluorides in snow is now only 1 mg l-1.
1978年3月和1984年，对源自加拿大两座老铝冶炼厂的地表积雪中的氟化物进行了研究，研究区域面积达4500平方公里。在此期间，冶炼厂内污染治理计划的完成，使每生产1吨金属产生的气态氟化物排放量从1.5千克降至0.7千克。1978年，该区域超过3000平方公里被工业氟化物污染，积雪中氟化物浓度高达13毫克/升。气态氟化物排放量的减少，以及总颗粒物排放量的大幅降低，极大地减少了积雪中的氟化物污染，现在积雪中氟化物的最高浓度仅为1毫克/升。
