A dynamic processes study of PM retention by trees under different wind conditions

Environmental Pollution
Changkun XieShengquan Che

Abstract

Particulate matter (PM) is one of the most serious environmental problems, exacerbating respiratory and vascular illnesses. Plants have the ability to reduce non-point source PM pollution through retention on leaves and branches. Studies of the dynamic processes of PM retention by plants and the mechanisms influencing this process will help to improve the efficiency of urban greening for PM reduction. We examined dynamic processes of PM retention and the major factors influencing PM retention by six trees with different branch structure characteristics in wind tunnel experiments at three different wind speeds. The results showed that the changes of PM numbers retained by plant leaves over time were complex dynamic processes for which maximum values could exceed minimum values by over 10 times. The average value of PM measured in multiple periods and situations can be considered a reliable indicator of the ability of the plant to retain PM. The dynamic processes were similar for PM10 and PM2.5. They could be clustered into three groups simulated by continually-rising, inverse U-shaped, and U-shaped polynomial functions, respectively. The processes were the synthetic effect of characteristics such as species, wind speed, period o...Continue Reading

Citations

Sep 30, 2020·Environmental Geochemistry and Health·Tiantian XiongShaoshan Li
Dec 19, 2018·International Journal of Environmental Research and Public Health·Bo HongJiaqi Niu
Sep 5, 2018·Environmental Science and Pollution Research International·Tiantian XiongShaoshan Li
Jul 25, 2020·Journal of the Air & Waste Management Association·Li GuoXin Liu
Mar 1, 2021·Environmental Monitoring and Assessment·Ting FangKai Cui
Jun 1, 2019·Journal of Environmental Management·Guoxin YanZhenming Zhang

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