松萝挂袋法监测氟化盐厂大气氟污染

以长松萝为材料，制成挂袋，与石灰滤纸法（ＬＴＰ）同步对白银市某氟人盐厂内外大气氟进行监测的结果表明：两种方法在监测效果上显著相关。由松萝挂袋法监测结果确定的污染等级范围与实际情况符合，从而证明此法监测大气氟污染的可行性与可靠性。与天然地衣调查法和种子植物污染成分分析法相比，松萝挂袋法具有不受时间、地点限制，可定量反映植物聚焦污染物的数量等优点，对环境质量评价有直接参考价值。

A USNEA LONGISSIMA HANGING BAGS AS MONITORS OF TOMOSPHERIC FLUORINE SALT FACTORY

The fluorine pollution in air was comparatively monitored with the methods of the hanging bags made of Usnea longissima and LTP both inside and outside Fluorization Salt Factory.The results obtained from 19 sites showed that the areas inside the factory and 200 m south from the factory were seriously polluted and those outside the factory and northwest from the factory were lightly polluted.The coefficient of correlation of Usnea and LTP is the most significant.Therefore,it was feasible to monitor fluorine pollution by means of Usnea hanging bags.The Usnea hanging bag method was better than the methods of investigation of natural lichens and analysis of the polluted components of spermatophyta,because this method could indicate the quantity of the pollutants accumulating in air and was not limited by time and location.The result monitored by means of Usnea hanging bag method would be of reference value to environmental quality assessment.