Chemical characteristics of rainwater in Sichuan basin, a case study of Ya'an
Li, Yun-Chun1,2; Zhang, Meng1; Shu, Man1; Ho, Steven Sai Hang3; Liu, Zi-Fang4; Wang, Xian-Xiang1; Zhao, Xiao-Qing1
2016-07-01
发表期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷号23期号:13页码:13088-13099
文章类型Article
摘要Rainwater chemistry was investigated at a semi-rural site in Ya'an, Sichuan basin with rain samples collected from May 2013 to July 2014. The rainwater pH values ranged from 3.25 to 6.86, with an annual volume-weighted mean (VWM) of 4.38, and the acid rain frequency was 74 %. Such severe acidification, 15 % of the total events showed a pH below 4.0, attributed to the deficiency of Ca2+, significant anthropogenic pollution contribution, and rainy pattern to this area. The annual VWM of total ions concentration was 477.19 mu cq/L. NH4+ was the most abundant ionic species, followed by SO42-, NO3-, Ca2+, Cl-, Na+, K+, Mg2+, and F- in a descending order. The total ionic concentrations presented a seasonal trend of lower values in autumn and summer but higher ones in winter and spring. Based on enrichment factor, correlation analysis and principle component analysis, three factors were identified: factor 1 (NH4+, SO42-, NO3-, K+, and Cl-, 47.45 % of the total variance) related to anthropogenic sources (coal/fuel combustion, biomass burning and agriculture), factor 2 (Ca2+, Mg2+, Na+, and Cl-, 34.01 % of the total variance) associated with natural sources, and factor 3 (H+, 11.78 % of the total variance) related to free acidity. Back trajectory analysis indicates that the rainwater chemistry in Ya'an was mainly affected by regional air masses from Sichuan basin. Long-range transported air masses from southwest with heavy anthropogenic pollution increased the total ion concentration and acidity of rainwater. Considering its special topography, anthropogenic emissions from regional and long-range transport (especially from southwest) must be controlled effectively to improve the acid rain condition of non-urban areas in Sichuan basin.
关键词Acid Rain Chemical Composition Sources Identification Sichuan Basin
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11356-016-6363-4
关键词[WOS]STRONTIUM ISOTOPE CHARACTERIZATION ; LONG-TERM TREND ; WET DEPOSITION ; PRECIPITATION CHEMISTRY ; INORGANIC-IONS ; SOUTH CHINA ; URBAN SITE ; SOUTHWESTERN CHINA ; MAJOR IONS ; ACID-RAIN
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000378817300046
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5721
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.Sichuan Agr Univ, Coll Sci, Yaan 625014, Peoples R China
2.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China
4.Environm Monitoring Stn Yaan City, Yaan 625014, Peoples R China
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GB/T 7714
Li, Yun-Chun,Zhang, Meng,Shu, Man,et al. Chemical characteristics of rainwater in Sichuan basin, a case study of Ya'an[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2016,23(13):13088-13099.
APA Li, Yun-Chun.,Zhang, Meng.,Shu, Man.,Ho, Steven Sai Hang.,Liu, Zi-Fang.,...&Zhao, Xiao-Qing.(2016).Chemical characteristics of rainwater in Sichuan basin, a case study of Ya'an.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,23(13),13088-13099.
MLA Li, Yun-Chun,et al."Chemical characteristics of rainwater in Sichuan basin, a case study of Ya'an".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 23.13(2016):13088-13099.
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