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Ying Yong Sheng Tai Xue Bao. 2019 Feb 20;30(2):503-510. doi: 10.13287/j.1001-9332.201902.003.

[PM2.5 adsorption capacity of Osmanthus fragrans and Cinnamomum camphora leaf surface and influencing factors under different pollution levels in Changsha, China].

[Article in Chinese; Abstract available in Chinese from the publisher]
Luo J1,2,3, Zhou XL1,3, Tian YX1,3, Chen JH2.

Author information

1
Hunan Forestry Academy, Changsha 410004, China.
2
Central South University of Forestry and Technology, Changsha 410004, China.
3
Hunan Cili Forest Ecosystem State Research Station, Cili 427200, Hunan, China.

Abstract

in English, Chinese

To understand the PM2.5 adsorption mechanisms of plants under different pollution levels and analyze pollutant sources, the PM2.5 adsorption amount of the leaves of two garden plant species (Cinnamomum camphora and Osmanthus fragrans) in different polluted level area (traffic area, culture and education area, cleaning area) of Changsha was measured using an aerosol generator. AFM scanning was used to obtain leaf surface micromorphological characteristics. Ion chromatography was used to measure the water-soluble ion content. Results showed that amount of PM2.5 adsorbed by leaves was positively correlated with pollution levels. The annual mean value of PM2.5adsorbed per leaf area of different plants was traffic area (0.56±0.04 μg·cm-2) > culture and education are (0.48±0.06 μg·cm-2) > clearing area (0.33±0.02 μg·cm-2). The season with amount of PM2.5adsorbed in leaves from the highest to lowest was winter (0.70±0.10 μg·cm-2) > spring (0.43±0.14 μg·cm-2) > autumn (0.39±0.12 μg·cm-2) > summer (0.31±0.09 μg·cm-2). Osmanthus fragrans had higher capacity to absorb PM2.5 than Cinnamomum camphora. Leaves of plants grown in low pollution areas were relatively smooth, whereas those in high pollution areas were rough. The order of leaf roughness in both species from high to low was traffic area (195.45±16.09 nm) > culture and education area (176.99±8.45 nm) > cleaning area (131.88±12.98 nm). The PM2.5 ionic content was the highest in winter, intermediated in spring and autumn, and the lowest in summer. The PM2.5 ions mainly included Na+, NH4+, Cl- and Br- in three pollution areas. PM2.5 pollution was due to removable source pollution at different pollution levels.

KEYWORDS:

PM 25 adsorption amount; leaf surface morphology; pollution degree; water-soluble ionic characteristics

PMID:
30915802
DOI:
10.13287/j.1001-9332.201902.003
[Indexed for MEDLINE]

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