摘要
2009年6月～2010年7月对三峡库首秭归地区大气降水SO24-含量和硫同位素组成特征进行了连续1 a的研究.结果表明,秭归地区降水SO24-浓度在31.4～668.1μmol.L-1之间,加权平均浓度为161.9μmol.L-1;降水SO24-硫同位素值δ34S在-2.14‰～6.07‰之间,平均值为2.06‰±1.97‰.SO24-含量季节变化特征明显,夏秋季节低,冬春季节高;而δ34S值则冬季偏正,而其他3个季节都相对偏负.对硫同位素值分析表明,生物来源硫可能对当地大气降水酸度有一定的贡献,且在夏秋季节尤为明显.
Rainwater samples were collected in the head area of the Three Gorges Reservoir from June 2009 to July 2010. The SO2-4 content and the characteristics of sulfur isotopic composition were determined. The results showed that the concentrations of S024- ranged from 31.4-668.1.μmol. L-1 with a weighted average of 161.9μmol. L- 2-4, whereas the variation of 834S values for SO24- ranged from -2. 14%o to 6.07%0 with an annual average of 2.06%0±1.97%0. Significant seasonal variations were found in the SO24-content, which were higher in winter and spring and lower in summer and autumn. The 834S values for SO24- measured in winter were much higher than those in the other seasons. Analysis of the 834S values showed that the biogenic sulfur might have significant contribution to the acidity of rainwater, especially in summer and autumn.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2012年第7期2145-2150,共6页
Environmental Science
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-QN109)
国家自然科学基金项目(40973088
41021062)
关键词
三峡水库
大气降水
硫同位素
生物来源硫
秭归
the Three Gorges Reservoir
rainwater
sulfur isotope
biogenic sulfur
Zigui
