摘要
溶解无机碳及其碳同位素(δ^(13)C_(DIC))是指示物质来源及生物地球化学特征和反映碳在陆地水循环过程中的重要手段。为了研究池武溪流域内地下水、地表水的溶解无机碳及碳同位素的变化特征和影响因素,文章于2019年6月、2019年12月对采样点进行监测。结果表明:池武溪流域水化学类型为HCO_(3)-Ca型或HCO_(3)-Ca·Mg型;流域DIC含量及δ^(13)C_(DIC)具有明显的季节变化特征,具体表现为枯水期大于丰水期,丰水期δ^(13)C_(DIC)比枯水期更偏负;枯水期和丰水期时硫酸和硝酸不同程度参与碳酸盐岩风化过程并使δ^(13)C_(DIC)偏正。
Dissolved inorganic carbon(DIC)and its carbon isotope(δ^(13)C_(DIC))are important means to indicate the source of material and biogeochemical characteristics and reflect the process of carbon in the terrestrial water cycle.In order to study the variation characteristics and influencing factors of dissolved inorganic carbon and carbon isotope in groundwater and surface water in Chiwu River,sampling points were monitored in June 2019 and December 2019.The results show that the water chemistry type of the River is HCO_(3)-Ca type or HCO_(3)-Ca·Mg type;the DIC content andδ^(13)C_(DIC) in the watershed have obvious seasonal variation characteristics,which are specifically expressed in the dry season greater than the wet season,and theδ^(13)C_(DIC)in the wet season is higher than the dry season.It is more negative;sulfuric acid and nitric acid participate in the carbonate weathering process to varying degrees during the dry and wet periods and makeδ^(13)C_(DIC) more positive.
作者
丁圣君
周忠发
石亮星
闫利会
黄静
张恒
DING Shengjun;ZHOU Zhongfa;SHI Liangxing;YAN Lihui;HUANG Jing;ZHANG Heng(College of Karst Institute/Geography and Environmental Science,Guizhou Normal University,Guiyang 550001,China;National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province,Guiyang 550001,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第6期27-34,共8页
Environmental Science & Technology
基金
国家自然科学基金项目:岩溶洞穴CO2迁移变化机制及对洞穴岩溶环境的影响(41361081)
贵州省科技计划项目:喀斯特洞穴系统碳循环机制研究(黔科合基础[2020]1Y154)
贵州师范大学资助博士科研项目:喀斯特关键带洞穴系统碳循环机理研究(GZNUD[2017]6号)。
关键词
岩溶地区
溶解无机碳
稳定碳同位素
karst areas
dissolved inorganic carbon
stable carbon isotopes
