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Studies on precipitation and its effects on atmospheric environment in Beijing in spring and summer |
HAN Li-hui, ZHANG Hai-liang, ZHANG Peng, XIANG Xin, CHENG Shui-yuan, WEI Wei |
Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China |
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Abstract A campaign of sampling atmospheric precipitation and particulate matter samples in Beijing in both spring and summer of 2015 was carried out to investigate the physical and chemical characteristics, temporal and spatial variations and sources of precipitation and its impacts on atmospheric particulate matter. A large amount of rainfall in spring and summer mostly occurred in summer. The volume-weighted mean (VWM) pH value of rainwater in the south of Beijing in spring and summer was 6.26, a little higher than that of 6.08 in the north, indicating that the rainwater in Beijing was largely non-acidic. At the same time, the VWM pH in spring was higher than that in summer in Beijing. The concentrations of major crustal elements in rainfall such as Al and Fe, were relatively high, while Ti, V and Ce were relatively low. The concentrations of major pollution elements in rainwater such as Ca and S, were much high, Na and Mg were relatively high, but Zn, Mn, Cu, Sr, Pb and Ni were relatively low, of which Na, Mg, Sr and Ni were lightly enriched in rainwater, Ca, Mn and Pb were enriched, and Cu, Zn and S were heavily enriched in rainwater. Furthermore, the concentrations of major elements in rainwater displayed the significant seasonal variations, of which the concentration of secondary pollution element S in summer was higher than that in spring, while the concentrations of the others in spring were higher than those in summer. The important spatial variations of major elements in rainwater have been shown, of which the concentrations of major elements in the south of Beijing, except for Pb, were higher than those in the north. The chemical compositions of precipitation were mainly from crustal dust, construction activities, coal combustion, vehicle emission and industrial emission. The scavenging effect of precipitation to aerosol particles and their components from the air was generally impacted by the rainfall intensity and the concentrations of pollutants before precipitation events. The precipitation could effectively scavenge pollution elements in fine particle PM2.5, such as Cu, Zn, Mn and Na, and crustal element Al, and Mg and Ca from construction dust in coarse particle PM10.
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Received: 20 November 2016
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[1] |
Tang A, Zhuang G, Wang Y, et al. The chemistry of precipitation and its relation to aerosol in Beijing[J]. Atmospheric Environment, 2005,39(19):3397-3406.
|
[2] |
胡敏,张静,吴志军.北京降水化学组成特征及其对大气颗粒物的去除作用[J]. 中国科学(B辑化学), 2005,35(2):169-176.
|
[3] |
金蕾,徐谦,林安国,等.北京市近二十年(1987~2004)湿沉降特征变化趋势分析[J]. 环境科学学报, 2006,26(7):1195-1202.
|
[4] |
Yang F, Tan J, Shi Z B, et al. Five-year record of atmospheric precipitation chemistry in urban Beijing, China[J]. Atmospheric Chemistry and Physics, 2012,12(4):2025-2035.
|
[5] |
李金香,李峰.北京市一次沙尘过程中降水化学组分的监测分析[J]. 中国环境科学, 2012,32(12):2149-2154.
|
[6] |
陈圆圆,田贺忠,杨懂艳,等.1997~2011年北京市空气中酸性物质与降水组分变化趋势的相关性分析[J]. 环境科学, 2013,34(5):1958-1963.
|
[7] |
高晓栋,陈锡云,丁肇慰,等.基于降水化学的北京城乡大气污染物差异探析[J]. 环境科学学报, 2015,35(12):4033-4042.
|
[8] |
GB/T 13580.2-1992大气降水样品的采集与保存[S].
|
[9] |
张霖琳,王超,刀谞,等.京津冀地区城市环境空气颗粒物及其元素特征分析[J]. 中国环境科学, 2014,34(12):2993-3000.
|
[10] |
洪也,马雁军,刘宁微.沈阳冬季大气颗粒物化学成分及其来源的分析[J]. 环境科学与技术, 2010,33(6E):292-296.
|
[11] |
张晓玲,赵秀娟,蒲维维,等.北京城区和远郊区大气细颗粒PM2.5元素特征对比分析[J]. 中国粉体技术, 2010,16(1):28-34.
|
[12] |
黎彤,袁怀雨,吴胜昔,等.中国大陆壳体的区域元素丰度[J]. 大地构造与成矿学, 1999,23(2):2-8.
|
[13] |
张秀芝,鲍征宇,唐俊红.富集因子在环境地球化学重金属污染评价中的应用[J]. 地质科技情报, 2006,25(1):65-72.
|
[14] |
彭玉龙,王永敏,覃蔡清,等.重庆主城区降水中重金属的分布特征及其沉降量[J]. 环境科学, 2014,35(7):2492-2496.
|
[15] |
Kyoung Lee B, Hee Hong S, Soo Lee D. Chemical composition of precipitation and wet deposition of major ions on the Korean peninsula[J]. Atmospheric Environment, 2000,34(4):563-575.
|
[16] |
Zhang Z, Friedlander S K. A Comparative Study of Chemical Databases for Fine Particle Chinese Aerosols[J]. Environmental Science & Technology, 2000,34(22):4687-4694.
|
[17] |
赵晴,贺克斌,马永亮,等.北京及周边地区夏季大气颗粒物区域污染特征[J]. 环境科学, 2009,30(7):1873-1880.
|
[18] |
刘杰,杨鹏,吕文生.北京大气颗粒物污染特征及空间分布插值分析[J]. 北京科技大学学报, 2014,36(9):1269-1279.
|
[19] |
丁国安,陈尊裕,高志球,等.北京城区低层大气PM10和PM2.5垂直结构及其动力特征[J]. 中国科学(D辑:地球科学), 2005, 35(增刊I):31-44.
|
[20] |
房春生,陈分定,陈克华,等.龙岩市大气颗粒物来源统计分析[J]. 中国环境科学, 2011,31(2):214-219.
|
[21] |
仇帅,张爱滨,刘明.青岛大气总悬浮颗粒物中微量元素的含量特征及其来源解析[J]. 环境科学学报, 2015,35(6):1667-1675.
|
[22] |
宋宇,唐孝炎,方晨,等.北京市大气细粒子的来源分析[J]. 环境科学, 2002,23(6):11-16.
|
[23] |
邹本东,徐子优,华蕾,等.因子分析法解析北京市大气颗粒物PM10的来源[J]. 中国环境监测, 2007,23(2):79-85.
|
[24] |
杨卫芬,银燕,魏玉香,等.霾天气下南京PM2.5中金属元素污染特征及来源分析[J]. 中国环境科学, 2010,30(1):12-17.
|
[25] |
王琴,张大伟,刘保献,等.基于PMF模型的北京市PM2.5来源的时空分布特征[J]. 中国环境科学, 2015,35(10):2917-2924.
|
[26] |
韩燕,徐虹,毕晓辉,等.降水对颗粒物的冲刷作用及其对雨水化学的影响[J]. 中国环境科学, 2013,33(2):193-200.
|
[27] |
杨雪,张群.南京市大气降水对空气质量影响研究[J]. 科技视界, 2014(30):278-279.
|
[28] |
王瑛,朱彬,康汉青,等.气溶胶云下清除理论及观测研究[J]. 中国科学院大学学报, 2014,31(3):306-313.
|
[29] |
谢华林,张萍,贺惠,等.大气颗粒物中重金属元素在不同粒径上的形态分布[J]. 环境工程, 2002,20(6):55-57.
|
[30] |
方凤满.中国大气颗粒物中金属元素环境地球化学行为研究[J]. 生态环境学报, 2010,19(4):979-984.
|
|
|
|