摘要
测定重金属铅对道路两侧野生植物的污染特征．采用火焰原子吸收分光光度法，测定张家口市北郊交通干线两侧浅山区段野生植物中铅的含量．测定结果表明，铅在0～8．00mg／L成线性关系，相关系数r=0．9997，线性方程Y=0．0758x—0．00133，检出限为0．024μg／mL．铅来源于汽车汽油的燃烧．进入土壤进行迁移，公路两侧野生植物中铅污染程度沿道路两侧距离的增加逐渐减弱，浅山区的野生植被对土壤中的铅有明显的吸收和固定作用，可以净化土壤保持生态系统的和谐．
Characteristics of lead polliction in wild plants on both sides of the roads were studied. With the flame atom absorption speetrophotometric method, the content of lead in wild plants on both sides of the main roads of nearby mountainous areas in northern suburb of Zhangjiakou city was determined. It indicated a linear relationship in the range of 0-8 mg/L of lead absorption, with the correlation coefficient r=0. 999 7, linear equation Y=0. 075 8X-0. 001 33, and the picked out limit 0. 024 （μg/ mL）. The lead from burning of petrol in cars migrated into soils. The degree of lead pollution decreased gradually with the increases of distances between wild plants and the road. The wild plants in nearby mountainous area have the obvious absorption and clamping action to the lead in soil and they may purify the soil and maintain the harmony of the ecosystem.
出处
《河北北方学院学报（自然科学版）》
2010年第5期34-37,共4页
Journal of Hebei North University:Natural Science Edition
关键词
铅
污染
野生植物
测定
lead
pollution
wild plant
determination
