2种常用的植物滞纳能力测定方法对比研究

A Comparative Study of Two Commonly Used Methods for Measuring Plant Dust Retention

测量评估植物叶片滞纳颗粒物能力是开展植物减霾净化研究的关键,文章以叶片特征差异较大的10种常见乔木为研究对象,分别采用气溶胶再发生器法和滤膜法进行测定,通过两种方法准确性、耗时成本、操作难度等多方面因素的综合比较选择适合广州植物滞纳大气颗粒物的测定方法。结果表明:(1)定性判断不同植物滞纳颗粒物能力大小时,气溶胶再发生器法的准确性、稳定性优于滤膜法;(2)滤膜法的实验耗时是气溶胶再发生器法的两倍,且操作难度较大,在进行大量采样测定时,宜采用气溶胶再发生器法;(3)采集充分接受粉尘的植物叶片为样本可能有利于提高气溶胶再发生器法的准确性。

Measuring the ability of plant leaves to trap particulate matter is key to conducting studies on air purification by plants.In this study,10 common trees with different leaf characteristics were used for the determination of aerosol regenerator method and filter membrane method,and the method was selected by comparing the accuracy,time and cost consumption,operational difficulty and other factors.The results show that the aerosol regenerator method is more accurate and stable than the filter membrane method when qualitatively determining the size of particle holding capacity of different plants;the aerosol regenerator method is more time and labor efficient,and it is advisable to use the aerosol regenerator method when conducting a large number of sampling measurements;collecting plant leaves that fully receive dust as samples may be beneficial to improve the accuracy of the aerosol regenerator method.