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《Environmental Chemistry》 2008-05
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CHEMICAL CHARACTERISTICS ON MAJOR IONS OF RAINWATER IN LIJIANG CITY

LI Zong-xing1, 2 HE Yuan-qing1 YUAN Ling-ling3 JIA Wen-xiong1 PANG Hong-xi1 HE Xian-zhong1 SONG Bo1 ZHANG Ning-ning1(1 State Key Laboratory of Cryosphere Science/Lijang station, Cold and Arid Region Environment and Engineering Research Institution,Chinese Academy of Sciences, Lanzhou, 730000, China; 2 Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China;3 College of Humanities & Social Sciences, Nanjing Agricultural University, Nanjing, 210095, China)  
Rainwater samples were colleted from1989 to 2006 in Lijiang city. Rainwater chemical characteristics were studied, using HYSPLIT model, ions tracer techniques, factor analysis, correlation and trend analysis. It is indicated that the total ionic concentration was dominated by SO2-4 and Ca2+, and account for 43.9% and 32.1% of total ionic concentration. Sort order of ions concentration is SO2-4﹥Ca2+﹥Cl-﹥NO-3﹥K+﹥Mg2+﹥Na+. The total anions concentration is higher than the total cations concentration. The correlation among ions is significant due to the atmospheric chemical process, especially K+, Mg2+,Ca2+and NO-3,SO2-4. Variation of ionic concentrations closely interrelated to the change of industrial structure from 1989 to 2006 in Lijiang city. Ions mainly origin from land dust, and the non-marine source percent of NO-3, SO2-4, K+, Ca2+, Mg2+ and Cl-is 100%, 98.4%, 98.4%, 99.8%, 92.4% and 83.4%, respectively.
【Fund】: 中国科学院重要方向性项目(KZCXZ-YW-317);; 国家自然科学基金重点项目(90511007);; 国家重点基础研究发展(973)计划(编号:2007CB411201);; 国家自然科学基金项目(40501014);; 基金委群体项目(40121101);; 中国科学院创新群体项目(CXTD-Z2005-2);; 丽江市政府委托项目
【CateGory Index】: X517
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