| 三峡库首秭归地区大气降水硫同位素组成及示踪研究 |
| 摘要点击 3375 全文点击 2116 投稿时间：2011-09-01 修订日期：2011-10-28 |
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| 中文关键词 三峡水库 大气降水 硫同位素 生物来源硫 秭归 |
| 英文关键词 the Three Gorges Reservoir rainwater sulfur isotope biogenic sulfur Zigui |
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| 中文摘要 |
| 2009年6月~2010年7月对三峡库首秭归地区大气降水SO42-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SO42-浓度在31.4~668.1 μmol·L-1之间,加权平均浓度为161.9 μmol·L-1;降水SO42-硫同位素值δ34 S在-2.14‰~6.07‰之间,平均值为2.06‰±1.97‰. SO42-含量季节变化特征明显,夏秋季节低,冬春季节高;而δ34 S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. |
| 英文摘要 |
| Rainwater samples were collected in the head area of the Three Gorges Reservoir from June 2009 to July 2010. The SO42- content and the characteristics of sulfur isotopic composition were determined. The results showed that the concentrations of SO42- ranged from 31.4-668.1 μmol·L-1 with a weighted average of 161.9 μmol·L-1, whereas the variation of δ34 S values for SO42- ranged from -2.14‰ to 6.07‰ with an annual average of 2.06‰±1.97‰. Significant seasonal variations were found in the SO42- content, which were higher in winter and spring and lower in summer and autumn. The δ34 S values for SO42- measured in winter were much higher than those in the other seasons. Analysis of the δ34 S values showed that the biogenic sulfur might have significant contribution to the acidity of rainwater, especially in summer and autumn. |
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