北京西山不同树种夏秋季PM2.5吸附量与润湿性关系

doi:10.3969/j.issn.1000-2006.201607040

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南京林业大学学报（自然科学版） ›› 2018, Vol. 42 ›› Issue (02): 113-119.doi: 10.3969/j.issn.1000-2006.201607040

北京西山不同树种夏秋季PM_2.5吸附量与润湿性关系

陈波¹,蒋燕²,鲁绍伟^1,3,李少宁^1,3,陈鹏飞⁴,刘海龙⁴,赵东波⁴

1.北京市林业果树科学研究院,北京燕山森林生态系统定位观测站,北京 100093; 2.西南林业大学生态与水土保持学院,云南昆明 650224; 3.北京林果业生态环境功能提升协同创新中心,北京 100093; 4.北京西山实验林场,北京 100093

出版日期:2018-04-12 发布日期:2018-04-12
基金资助:
基金项目:北京市农林科学院青年基金项目(QNJJ201530); 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项目(2011协同创新中心)(PXM2017_014207_ 000038); 北京森林生态质量状况监测基础数据平台建设项目(KJCX20160301); 北京市农林科学院科技创新团队成果(JWKST201609) 第一作者:陈波(zhyechb2010@163.com),助理研究员。*通信作者:鲁绍伟(hblsw8@163.com),研究员,博士。

Relationship between PM_2.5 adsorption and wettability of different trees during summer, autumn in West Mountain of Beijing

CHEN Bo¹, JIANG Yan², LU Shaowei^{1,3 Symbolj@@}, LI Shaoning^1,3, Symbol`@@ CHEN Pengfei⁴,LIU Hailong⁴, ZHAO Dongbo⁴

1.Beijing Academy of Forestry and Pomology Sciences, Beijing Yanshan Forest Ecosystem and Observation Station, Beijing 100093, China; 2. College of Ecology and Soil & Water Conservation, Southwest Forestry University, Kunming 650224, China; 3.Beijing Collaborative Innovation Center for Eco-Environmental Improvement with Forestry and Fruit Trees, Beijing 100093, China; 4.Xishan Experimental Forest Farm of Beijing City, Beijing 100093, China

Online:2018-04-12 Published:2018-04-12

摘要/Abstract

摘要： 【目的】北京地区环境问题中的颗粒物PM_2.5污染备受关注。研究北京地区阔叶树种的PM_2.5吸附量季节差异及影响因素,探讨各树种叶片吸附PM_2.5机理,为城市绿化树种的科学选择提供参考。【方法】以北京西山4种阔叶树种(柳树Salix babylonica、五角枫Acer mono、银杏Ginkgo biloba、杨树Populus spp.)为对象,应用气溶胶再发生器测定植物叶片夏秋PM_2.5吸附量,用光学接触角测量仪测定叶片与水及二碘甲烷接触角,运用Owens-Wendt-Kaelble法,并结合Young方程计算叶片表面自由能及其极性和色散分量。【结果】树种单位叶面积PM_2.5吸附量平均值依次为柳树[(0.97±0.46)μg/cm²]>五角枫[(0.78±0.39)μg/cm²]>银杏[(0.69±0.31)μg/cm²)]>杨树[(0.62±0.21)μg/cm²],杨树与柳树、银杏吸附PM_2.5能力差异均显著(P<0.05),秋季树种PM_2.5吸附量高于夏季; 树种PM_2.5吸附量与其润湿性(接触角)呈正(负)相关(P<0.01),与叶片表面自由能(P<0.05)及其色散分量(P<0.01)也呈正相关,与极性分量相关性不显著。【结论】4种阔叶树的PM_2.5滞尘能力以柳树最强,杨树最弱,五角枫、银杏次之,阔叶树种夏季滞尘能力高于秋季; 可以根据各树种吸附PM_2.5特征合理调整城市绿化规划,充分发挥城市绿地系统的生态功能。

Abstract: 【Purposes】Beijing, as an international metropolis, has a serious environmental problem. Seasonal difference of PM_2.5 adsorption and its affecting factors between broadleaf trees was observed. It aims to investigate the adsorption mechanism of leaf on PM_2.5among various tree species and support the selection of urban landscaping tree species.【Methods】 Four tree species(Salix babylonica, Acer mono, Ginkgo biloba and Populus spp.)were selected and their accumulation capacity of PM_2.5 were observed in Western Mountainous areas of Beijing. An aerosol generator was used for quantitative determination of PM_2.5 adsorption. We measured contact angel between leaves and water, diiodomethane. Surface free energy and its polar and dispersive component of leaf were calculated based on Owens-Wendt-Kaelble method and Young equation.【Results】The accumulation capacities of leaves on PM_2.5 per leaf area were S. babylonica((0.97±0.46)μg/cm²)>A. mono((0.78±0.39)μg/cm²)>G. biloba((0.69±0.31)μg/cm²)>Populus spp.((0.62±0.21)μg/cm²).The differences of adsorption capacity on PM_2.5 between S. babylonica and G. biloba, Populus spp. were obvious(α=0.05, P<0.05).The adsorption quantity of tree on PM_2.5 in autumn was higher than that in summer. There was a significant relationship between leaf surface wettability(leaf contact angel)and leaf adsorption quantity on PM_2.5(P<0.01).The adsorption of tree on PM_2.5was positively correlated with leaf surface free energy(P<0.05). Its dispersive component had a significant correlation with leaf adsorption quantity on PM_2.5(P<0.01), where as non significant relationship was found with polar free energy. 【Conclusion】 PM_2.5 accumulation capacity among the broadleaf trees: the strongest was S. babylonica and the weakest was Populus spp. Accumulation capacity of them in summer was higher than it in autumn. We can make the plans on city landscape rationally, according to PM_2.5 adsorption characteristics of various tree species, so as to develop the ecological function of urban greenland system.

中图分类号:

S719
X513

陈波,蒋燕,鲁绍伟,等. 北京西山不同树种夏秋季PM_2.5吸附量与润湿性关系[J]. 南京林业大学学报（自然科学版）, 2018, 42(02): 113-119.

CHEN Bo, JIANG Yan, LU Shaowei^{1,3 Symbolj@@}, LI Shaoning, Symbol`@@ CHEN Pengfei,LIU Hailong, ZHAO Dongbo. Relationship between PM_2.5 adsorption and wettability of different trees during summer, autumn in West Mountain of Beijing[J].Journal of Nanjing Forestry University (Natural Science Edition), 2018, 42(02): 113-119.DOI: 10.3969/j.issn.1000-2006.201607040.

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北京西山不同树种夏秋季PM_2.5吸附量与润湿性关系

Relationship between PM_2.5 adsorption and wettability of different trees during summer, autumn in West Mountain of Beijing

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北京西山不同树种夏秋季PM2.5吸附量与润湿性关系

Relationship between PM2.5 adsorption and wettability of different trees during summer, autumn in West Mountain of Beijing

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北京西山不同树种夏秋季PM_2.5吸附量与润湿性关系

Relationship between PM_2.5 adsorption and wettability of different trees during summer, autumn in West Mountain of Beijing