首页|Coagulation effect of atmospheric submicron particles on plant leaves: Key functional characteristics and a comparison with dry deposition

Coagulation effect of atmospheric submicron particles on plant leaves: Key functional characteristics and a comparison with dry deposition

扫码查看
原文链接
  • NETL
  • NSTL
  • Elsevier
Submicron particles have become a new focus in research on air pollution control. The abilities of urban tree species to retain particles can be used to alleviate urban haze pollution. However, research has focused mostly on plants and environmental conditions rather than on particle itself. Particle migration and transformation at the leaf-air interface are the key to dust retention. Submicron particles coagulatewhen they are retained by leaves. In this study, NaCl was used to simulate submicron particles. The average sizes of the particles on the leaves of 10 greening tree species in Shanghai in different seasons were measured using the sweep-resuspension method to characterize the coagulation effect. Thereafter, the effects of leaf characteristics were investigated and analyzed in relation to dry deposition velocity. The results indicated that the particles on the leaves of Ginkgo biloba, Osmanthus fragrans, Sabina chinensis (L.) Ant. “Kaizuca,” Cinnamomum camphora, and Metasequoia glyptostroboides were large. The seasonal variability of the sizes of the particles on the leaves of different tree species varied. The average particle size was positively correlated with wax content and negatively correlated with single leaf area; however, the other factors correlated with particle size varied by season. For example, in April, the average particle size was positively correlated with tensile strength, wind resistance, adaxial epidermal roughness, and water potential, whereas the effects of stomatal conductance were more complex. Non-significant correlation was identified between coagulation and dry deposition although both were positively correlated with roughness and wax content. This study explored the effects of leaf characteristics on coagulation. The results may serve as a theoretical foundation for explaining the microscopic process underlying dust retention in plants and may provide a clearer scientific basis for the prevention and control of submicron particle pollution and the selection of urban greening tree species.

Submicron particlesGreening trees speciesCoagulation effectAverage particle sizeLeaf characteristicsInfluence mechanism

Junyao Lyu、Dele Chen、Xuyi Zhang、Jingli Yan、Guangrong Shen、Shan Yin

展开 >

School of Agriculture and Biology,Shanghai Jiao Tong University,800 Dongchuan Rd.,Shanghai 200240,China, Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station,Ministry of Science and Technology,Ministry of Education, 800 Dongchuan Rd.,Shanghai 200240,China, Shanghai Urban Forest Ecosystem Research Station,National Forestry and Grassland Administration,800 Dongchuan Rd.,Shanghai 200240,China

School of Agriculture and Biology,Shanghai Jiao Tong University,800 Dongchuan Rd.,Shanghai 200240,China, Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station,Ministry of Science and Technology,Ministry of Education, 800 Dongchuan Rd.,Shanghai 200240,China, Shanghai Urban Forest Ecosystem Research Station,National Forestry and Grassland Administration,800 Dongchuan Rd.,Shanghai 200240,China, Key Laboratory for Urban Agriculture,Ministry of Agriculture and Rura

2023

10.1016/j.scitotenv.2023.161582

Science of the Total Environment

Science of the Total Environment

EISCI
ISSN：0048-9697
年,卷(期)：2023.868(Apr.10)
  • 4
  • 57