Seasonal variations in sulfur isotopic composition of dissolved SO42− in the Aha Lake, Guiyang and their implications
Seasonal variations in sulfur isotopic composition of dissolved SO42− in the Aha Lake, Guiyang and their implications
复制标题
贵阳阿哈湖溶解SO42−硫同位素组成的季节变化及其意义
DOI：
10.1007/s11631-011-0530-6
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
L. Bai
中科院分区：
文献类型：
--
作者：
Liuting Song;Congqiang Liu;Zhong;Yanguo Teng;Jinsheng Wang;Lili Liang;L. Bai
中国说，阿哈湖是贵州省贵阳市西南部的季节性缺氧水系。研究了湖水和支流中SO42-−浓度及其同位素组成的季节变化。结果表明，江水硫酸盐浓度范围为0.94~6.52mmoL/L，δ34S值范围为t14.9‰和0.9‰；湖水硫酸盐浓度范围为1.91~2.79 mmoL/L，δ34S值范围为−9.8‰~−5.9‰。认为采煤排水是阿哈湖SO42-−的主要来源。降雨、污水排放、硫化物氧化和石膏溶解的影响有限。夏季和冬季DB和LJK的溶解SO_4_2、−和δ_(34)S随深度的分布不同。由于水的倾覆，δ34S值在冬春季表现出均匀的垂直分布。而在夏季和秋季，由于水体层结，表层和底层的δ34S明显正向漂移。表层较高的δ~(34)S值可能是水体层结过程中雨水滞留的结果。细菌异化硫酸盐还原作用可能是细菌δ34S值升高的主要原因。
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 t14.9‰ and 0.9‰, while lake water has sulfate concentrations ranging from 1.91 to 2.79 mmol/L, and δ34S 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 SO42−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 epilimnion 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.
影响因子：
9.8
作者：
Hosono, Takahiro;Nakano, Takanori;Yachi, Shigeo
通讯作者：
Yachi, Shigeo