总悬浮微粒中的沥青成分在植物中的累积

Accumulation of Asphalt Fractions from Total Suspended Particulate Matters in Various Plant Species

在参照美国试验与材料协会标准分析方法（ＡＳＴＭＤ４１２４）的基础上，对邻近高速公路的多种植物样品和大气中总悬浮颗粒样品中的沥青成分极性芳烃（ｐｏｌａｒａｒｏｍａｔｉｃｓ）、环烷芳烃（ｎａｎｈｔｈｅｎｅａｒｏｍａｔｉｃｓ）和饱和物进行了分析。将分析结果与取自高速公路表面的沥青样品和相应的背景植物样品的分析结果对比得知：３种有机组分在植物中的累积过程中，沥青起了主要作用。在实验所分析的植物样品中，３种有机组分在每ｇ于植物样品中的含量分别为０．２９－３．０７ｍｇ（极性芳烃）、０．８９－３．８９ｍｇ（环烷芳烃）和０．３７—１．５３ｍｇ（饱和物）。

With reference to ASTM D4.124, asphalt fractions, including polar aromatics, naphthene aromatics and saturates, were characterized both invarious plant samples and in total suspended particulate sample. In comparison to the results ofbackground plant samples and asphalt cementsample from highway surface, it is concluded thatasphalt makes the main contributions to the accumulation of the three organic fractions mentionedabove in plant species. For the plant samples usedin this research, the concentrations of the threefractions are 0. 29 -- 3. 07 m-g polar aromatics,0. 89--- 3. 89 mg naphthene aromatics and 0. 371. 53 mg saturates per gram dry plant materials.