Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong, China
Xu Gang1,2; Lee XinQing2; Lue YingChun1; Chen YingJun1; Huang DaiKuan2
发表期刊CHINESE SCIENCE BULLETIN
ISSN1001-6538
2010-06-01
卷号55期号:16页码:1667-1673
关键词Rainwater Acid Rain Ion Chromatogram Carboxylic Acids Seasonal Variation
产权排序[Xu Gang; Lue YingChun; Chen YingJun] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Xu Gang; Lee XinQing; Huang DaiKuan] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
通讯作者Xu, G, Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
作者部门滨海湿地实验室 
英文摘要Low molecule weight carboxylic acids are ubiquitous and important chemical constituents in the troposphere. Seven carboxylic acids in the rainwater of Guiyang and Shangzhong were simultaneously determined by ion chromatography from April 2006 to April 2007. Formic, acetic and oxalic acids were found to be the predominant carboxylic acids. Their volume weighted average concentration (VWA) in the rainwater of Guiyang were 14.24 mu mol/L, 9.35 mu mol/L and 2.79 mu mol/L, respectively; as compared to 4.95 mu mol/L, 1.35 mu mol/L and 2.31 mu mol/L in the rainwater of Shangzhong. In Shangzhong it is witnessed that the concentrations of these acids were higher in the summer than in the winter and direct emissions from vegetations or soils may account for the main provenance of the acids. This is, however, not the case in Guiyang, where the concentrations of the carboxylic acids were higher during the non-growing season than during the growing season. The relatively weak scavenging affected by scarce and little rainwater as well as the particles accompanied with the rainfall may have some effect on the carboxylic acids during the wintertime in Guiyang. Carboxylic acids in the rainwater of Guiyang were estimated to account for 18.7% to the free acidity, where formic, acetic and oxalic acids accounted for 7.9%, 4.7%, 6.1%, respectively. In Shangzhong, the 3 primary carboxylic acids represented 58.1% to the free acidity where formic, acetic and oxalic acids represented 25.1%, 7.5%, 25.5%, respectively. Carboxylic anions accounted for 6.6% (1.7%-19.2%) to the total anions in the rainwater of Guiyang. Carboxylic anions represented 13.2% (0.5%-92.2%) to the total anions in the rainwater of Shangzhong. These results indicated that carboxylic acids were the important contributors to the rainwater acidity, especially in remote regions.; Low molecule weight carboxylic acids are ubiquitous and important chemical constituents in the troposphere. Seven carboxylic acids in the rainwater of Guiyang and Shangzhong were simultaneously determined by ion chromatography from April 2006 to April 2007. Formic, acetic and oxalic acids were found to be the predominant carboxylic acids. Their volume weighted average concentration (VWA) in the rainwater of Guiyang were 14.24 mu mol/L, 9.35 mu mol/L and 2.79 mu mol/L, respectively; as compared to 4.95 mu mol/L, 1.35 mu mol/L and 2.31 mu mol/L in the rainwater of Shangzhong. In Shangzhong it is witnessed that the concentrations of these acids were higher in the summer than in the winter and direct emissions from vegetations or soils may account for the main provenance of the acids. This is, however, not the case in Guiyang, where the concentrations of the carboxylic acids were higher during the non-growing season than during the growing season. The relatively weak scavenging affected by scarce and little rainwater as well as the particles accompanied with the rainfall may have some effect on the carboxylic acids during the wintertime in Guiyang. Carboxylic acids in the rainwater of Guiyang were estimated to account for 18.7% to the free acidity, where formic, acetic and oxalic acids accounted for 7.9%, 4.7%, 6.1%, respectively. In Shangzhong, the 3 primary carboxylic acids represented 58.1% to the free acidity where formic, acetic and oxalic acids represented 25.1%, 7.5%, 25.5%, respectively. Carboxylic anions accounted for 6.6% (1.7%-19.2%) to the total anions in the rainwater of Guiyang. Carboxylic anions represented 13.2% (0.5%-92.2%) to the total anions in the rainwater of Shangzhong. These results indicated that carboxylic acids were the important contributors to the rainwater acidity, especially in remote regions.
文章类型Article
资助机构National Basic Research Program of China [2006CB43205]; National Natural Science Foundation of China [4053048]
收录类别SCI
语种英语
关键词[WOS]ACETIC-ACIDS ; ORGANIC-ACIDS ; FORMIC-ACID ; PRECIPITATION ; TROPOSPHERE ; VENEZUELA ; CHEMISTRY ; SITE ; PART
研究领域[WOS]Science & Technology - Other Topics
WOS记录号WOS:000278704200015
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/3695
专题中国科学院海岸带环境过程与生态修复重点实验室_滨海湿地实验室
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
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Xu Gang,Lee XinQing,Lue YingChun,et al. Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong, China[J]. CHINESE SCIENCE BULLETIN,2010,55(16):1667-1673.
APA Xu Gang,Lee XinQing,Lue YingChun,Chen YingJun,&Huang DaiKuan.(2010).Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong, China.CHINESE SCIENCE BULLETIN,55(16),1667-1673.
MLA Xu Gang,et al."Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong, China".CHINESE SCIENCE BULLETIN 55.16(2010):1667-1673.
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