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Seasonal variations in sulfur isotopic composition of dissolved SO4 2- in the Aha Lake, Guiyang and their implications

ISSN号：2096-0956
期刊名称：《中国地球化学学报：英文版》
时间：0
分类：X513[环境科学与工程—环境工程] P641.12[天文地球—地质矿产勘探;天文地球—地质学]
作者机构：[1]College of Water Sciences, Beijing Normal University, Beijing 100875, China, [2]Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing 100875, China, [3]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
相关基金：Acknowledgements The authors wish to thank Liu Xiaolong, Ding Hu and Zhang Wei for their involvement in filed work. The anonymous reviewers and editors were also greatly appreciated with their thoughtful reviews. This research was financially supported by the Natural Science Foundation of China （Nos. 40903008, 90610037, 40721002）, the Open Research Fund of State Key Laboratory of Environmental Geochemistry, Chinese Academy of Sciences （SKLEG9006）, and the Chinese important special project （No. 2009ZX07419-003）.

作者： SONG Liuting[1,2,3], LIU Congqiang[3], WANG Zhongliang[3], TENGYanguo[1,2], WANG Jinsheng[1,2], LIANG Lili[3], BAI Li[3]

关键词：硫同位素组成, 石膏溶解, 季节变化, 阿哈湖, 贵阳市, 硫酸盐还原细菌, 浓度范围, 硫化物氧化, Aha Lake, sulfur isotope, source, geochemical cycling

中文摘要：

啊哈湖是在 Guiyang 城市的西南的一个季节的缺氧的水系统，贵州省，中国。在 SO4 2 集中的季节的变化和他们湖水里以及在支流的同位素的作文在这研究被调查。结果证明河水里的硫酸盐集中从 t14.9 从 0.94 ～ 6.52 mmol/L 和他们的 34S 价值范围并且 0.9 当湖水有硫酸盐集中从 1.91 ～ 2.79 时， mmol/L，和 34S 从 9.8 ～ 5.9 珍视。煤采矿排水是在啊哈湖的 SO4 2 的主要来源，这被建议。降雨，污水分泌物，硫化物氧化和石膏溶解做了仅仅有限的贡献。溶解 SO4 2 和 34S 的不同深度依赖者分布在夏天和冬季为 DB 和 LJK 被开发。由于水翻， 34S 价值在冬季和春天显示同质的垂直分布。当时在夏天和秋天， 34S 的重要积极移动清楚地由于水层化在 epilimnion 和底部阶层被观察。在 epilimnion 的高 34S 价值可以在水层化期间源于雨水的保留。由细菌的 Dissimilatory 硫酸盐减小被认为为 hypolimnion 的 34S 价值的增加负责。

英文摘要：

The Aha Lake is a seasonal anoxic water system in the southwest of Guiyang City, Guizhou Province, China. Seasonal variations in SO42- concentrations and their isotopic compositions in lake water as well as in the tributaries were investigated in this study. The results showed that sulfate concentrations in river water range from 0.94 to 6.52 mmol/L and their δ34S values range from -14.9‰ and 0.9‰, while lake water has sulfate concentrations ranging from 1.91 to 2.79 mmol/L, and 834S values from -9.8‰ to -5.9‰. It is suggested that coal mining drainage is the major source of SO42 in the Aha Lake. Rainfall, sewage discharge, sulfide oxidation and gypsum dissolution have made only limited contributions. Different depth-dependent distributions of dissolved SO4 2- and δ34S were developed for both DB and LJK in summer and winter. Due to water overturn, δ34S values display homogenous vertical distributions in winter and spring. While in summer and autumn, significant positive shifts of δ34S were clearly observed in epilirmtion and bottom strata as a result of water stratification. High δ34S values in epilimnion may result from the retention of rainwater during water stratification. Dissimilatory sulfate reduction by bacteria was thought to be responsible for the increase of δ34S value in hypolimnion.

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