| 河北平原地下水硫酸盐34S和18O同位素演化特征 |
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| 关键词:sulfate 34S 18O groundwater Hebei plain |
| 基金项目:国家自然科学基金“硫酸盐中17O和18O同时测试技术及其应用”和“微量水17O和18O同时测试新技术及其在水循环研究中的应用”项目(编号:40572140,40602030) |
| 作者 | 单位 | E-mail | | 李小倩 | 中国地质大学研究生院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | lxq511030@163.com | | 周爱国 | 中国地质大学环境学院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 刘存富 | 中国地质大学环境学院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 蔡鹤生 | 中国地质大学环境学院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 武金博 | 中国地质大学研究生院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 甘义群 | 中国地质大学环境学院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 周建伟 | 中国地质大学环境学院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | | | 余婷婷 | 中国地质大学研究生院,湖北武汉430074
生物地质与环境地质教育部重点实验室,湖北武汉430074 | |
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| 34S and 18O Isotopic Evolution of Residual Sulfate in Groundwater of the Hebei Plain |
| Sulfur and oxygen isotopic compositions play a significant role in studying groundwater quality evolution and its environment characteristics.A section along Baoding-Hejian-Cangzhou-Huangye was selected to collect deep groundwater samples,and the samples were then analyzed for such items as main ions,δ18O,δD,14CO,δ34Ssulfate-residual and δ18Osulfate-residual.On this basis,this paper has discussed the distribution characteristics of 34S and 18O residual sulfate in deep groundwater and their potential evolution mechanism in Quaternary sediments of the Hebei Plain.It is pointed out that δ34Ssulfate-residual values rise in the groundwater flow direction and δ18Osulfate-residual values vary in a narrow range and finally tend to attain a constant value, that the two kinds of values show an obvious negative correlation, that δ34Ssulfate-residual values increase together with the older 14C age of groundwater and δ18Osulfate-residual values tend to attain a constant value with the increasing 14C age of groundwater, and that δ34Ssulfate-residual values have also a negative correlation with r(SO42-)/r(Cl-)mole ratios of groundwater while a positive correlation exists between δ18Osulfate-residual values and SO42-/Cl- mole ratios of groundwater. The fractors controlling 34S and 18O evolution of sulfate residuals in groundwater might be the isotope exchange reaction betwen SO42- and groundwater, the sulfate reduced by bacteria and the re-oxidation of H2S. The sulfate residuals in groundwater are likely to be rich in 34S as the sulfate is reduced by bacteria. The oxygen isotope exchange reaction between SO42- and groundwater is the controlling factor of δ18Osulfate-residual values, which cuases the dependency of δ18Osulfate-residual values on oxygen isotopic composition of groundwater. |
| LI Xiao-qian,ZHOU Ai-guo,LIU Cun-fu,CAI He-sheng,WU Jin-bo,GAN Yi-qun,ZHOU Jian-wei,YU Ting-ting.2008.34S and 18O Isotopic Evolution of Residual Sulfate in Groundwater of the Hebei Plain[J].Acta Geoscientica Sinica,29(6):745-751. |
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