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《Environmental Science & Technology》 2018-06
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Function Study of Coniferous Species Leaf Retention of PM_(2.5) in Winter in Xishan Mountain of Beijing

CHEN Bo;LI Shaoning;LU Shaowei;LIU Hailong;ZHAO Dongbo;CHEN Pengfei;Yanshan Forest Ecosystem Research Observation Station of Beijing,Beijing Academy of Forestry and Pomology Sciences;Collaborative Innovation Center for Horticulture Ecological Environment Function Promoting;Xishan Experimental Forest Farm of Beijing;  
The capture of PM_(2.5) on leaf surface of eight coniferous tree species and the relation to leaf micro-structure were studied in Xishan Mountain of Beijing. An aerosol generator was used for quantitative determination of PM_(2.5) adsorption.Atomic force microscopy(AFM) was used to determine micro morphology characteristics on the leaf surface, and interprete the relationship between the surface structure and PM_(2.5) adsorption of different tree species. Results show that the PM_(2.5) adsorption capacity per unit leaf area was as follows in winter: Cedrus deodara((3.04±0.39) μg/cm~2)Pinus tabuliformis((2.93±0.32) μg/cm~2)Korean Pine((2.87±0.28) μg/cm~2)Pinus koraiensis((2.79±0.29) μg/cm~2)Platycladus orientalis((2.19±0.20) μg/cm~2)Abies fabri((1.89±0.33) μg/cm~2)Juniperus chinensis((1.80±0.25) μg/cm~2)Sabina chinensis((1.75±0.19)μg/cm~2). PM_(2.5) adsorption capacity per unit leaf area was as February((2.81±0.59) μg/cm~2)January((2.45±0.53) μg/cm~2)December((2.33±0.51) μg/cm~2)November((2.05±0.48) μg/cm~2). In terms of leaf surfaces, the leaves of Cedrus deodara,Pinus bungeana and Pinus tabulaeformis has grooves, with larger stomatal density and high roughness, absorption ability of PM_(2.5) is strong; while the leaf surfaces of Abies fabri, Juniperus chinensis and Sabina chinensis are smooth, with smaller stomatal density and less villus, the PM_(2.5) absorption ability is weaker. Therefore, in order to improve the environmental effect of urban vegetation, the surface morphology of the leaf can be beneficial to the species of PM_(2.5) and other particles.
【Fund】: 北京市农林科学院青年科研基金(QNJJ201530);北京市农林科学院科技创新团队(JWKST201609);; 科技创新服务能力建设—协同创新中心—林果业生态环境功能提升协同创新中心(2011协同创新中心)(市级)(PXM2017_014207_000043)
【CateGory Index】: X173
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