摘要
识别地下水溶解性硫酸盐来源及其生物地球化学循环过程是保障饮用水安全和水生态安全的重要前提,对于地下水资源的管理和保护具有重要的意义。在广泛查阅文献的基础上,总结了不同地下水硫酸盐来源δ^(34)S_(SO 4)和δ^(18)O_(SO 4)值域范围;综述了地下水硫酸盐溯源及硫生物地球化学循环过程解析的研究进展,指出了存在问题和发展趋势。地下水硫酸盐来源识别方法经历了水化学方法→单同位素→双同位素→多同位素和多示踪剂定性识别→定量评估的发展历程;因特定地域来源的硫、氧同位素差异和生物地球化学转化过程等因素的影响,地下水硫酸盐溯源尚存在较大的不确定性。建议在地下水流系统框架上结合土地利用分布,布置采样点采集污染源和地下水样品,测定水化学和硫酸盐的硫氧同位素值及其他辅助性示踪剂同位素值或浓度,利用多学科、多方法充分融合研究区水文地球化学、渗流场、土地利用等信息,解析地下水硫酸盐的来源及其贡献,以支撑地下水资源保护和污染防治的科学实施。
Effective identification of the sources and biogeochemical processes of dissolved sulfate in groundwater is an important prerequisite for ensuring drinking water safety and aquatic ecological security and is of significance to manage and protect groundwater resources.In this review,the sources of groundwater sulfate and the typical range ofδ^(34)S andδ^(18)O isotope from different sulfate sources are summarized by reviewing the literature;the identification of sulfate sources and S biogeochemical cycles byδ^(34)S andδ^(18)O isotope in sulfate is reviewed,and the existing problems and development trends are proposed.The source apportionment of groundwater sulfate sources has gone through the processes of hydrochemistry analysis→δ^(34)S isotope→dual isotope→qualitative identification of multiple isotopes and tracers→quantitative evaluation.Due to the differences in sulfur and oxygen isotopes and the biogeochemical transformation processes in a specific region,there is still a larger uncertainty in the determination of groundwater sulfate sources.It is proposed to arrange the sampling points for collecting pollution sources and groundwater samples on the framework of groundwater flow systems and land use distributions and to analyze the hydrochemical components and the sulfur and oxygen isotope values of sulfate and other complementary tracer isotope values and/or concentrations in a specific area.The sources and their contributions of groundwater sulfate are analyzed using multidisciplinary and multi-methods based on the full integration of hydrogeochemistry,seepage field,land use and other information in a study area for the scientific implementation of groundwater resource protection and pollution prevention.
作者
靳孟贵
张结
张志鑫
曹明达
黄鑫
Jin Menggui;Zhang Jie;Zhang Zhixin;Cao Mingda;Huang Xin(School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430078,China)
出处
《地质科技通报》
CAS
CSCD
北大核心
2022年第5期160-171,共12页
Bulletin of Geological Science and Technology
基金
国家自然科学基金项目(41877192)
中国地质大学(武汉)中央高校基本科研业务费专项资金资助项目(CUGDCJJ202212
CUGDCJJ202213)。
关键词
地下水
硫酸盐
硫氧同位素
源解析
groundwater
sulfate
δ^(34)S_(SO 4)andδ^(18)O_(SO 4)isotopes
source apportionment
