Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong, China
文献类型：期刊论文
| 作者 | Xu Gang1,2 ; Lee XinQing2; Lue YingChun1; Chen YingJun1; Huang DaiKuan2
|
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 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 |
| ISSN号 | 1001-6538 |
| 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 |
| 文献子类 | Article |
| 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. |
| 学科主题 | Multidisciplinary Sciences |
| URL标识 | 查看原文 |
| WOS关键词 | ACETIC-ACIDS ; ORGANIC-ACIDS ; FORMIC-ACID ; PRECIPITATION ; TROPOSPHERE ; VENEZUELA ; CHEMISTRY ; SITE ; PART |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000278704200015 |
| 资助机构 | National Basic Research Program of China [2006CB43205]; National Natural Science Foundation of China [4053048] |
| 公开日期 | 2011-07-14 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/3696]  |
| 专题 | 烟台海岸带研究所_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 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：烟台海岸带研究所
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