开放型沉陷湖泊溶解无机碳来源解析  

Source Apportionment of Dissolved Inorganic Carbon in An Open Subsidence Lake

作　　者：朱琦煜 陈亮[2] 姜春露[1,3] ZHU Qiyu;CHEN Liang;JIANG Chunlu(School of Resources and Environmental Engineering,Anhui University,Hefei,Anhui 230601,China;Jiangsu Branch of China National Geological Exploration Center of Building Materials Industry,Nanjing,Jiangsu 211135,China;School of Resources and Geoscience,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]安徽大学资源与环境工程学院,安徽合肥230601 [2]中国建筑材料工业地质勘查中心江苏总队,江苏南京211135 [3]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《环境监测管理与技术》2025年第2期31-37,共7页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(42107055,52174156)。

摘　　要：以安徽省北部开放型沉陷湖泊(口孜东矿沉陷湖)为研究对象,利用各端元溶解性无机碳(DIC)含量及端元模型和CO_(2)扩散模型,确定地下水排放输入的碳通量。结果表明:δ^(13)C_(DIC)与DIC在不同水体中具有相似的变化趋势,两者之间虽然具有一定的相关性,但总体不显著,水化学要素是影响δ^(13)C_(DIC)值空间分布的主要原因;沉陷湖水、河水及地下水中DIC来源为土壤CO_(2)和碳酸盐岩风化,且沉陷湖水中的DIC大部分来自碳酸盐岩风化;水气界面CO_(2)通量均值达到164.26 mmol/(m^(2)·d),河流输入CO_(2)通量达到368.31 mmol/(m^(2)·d),来自地下水的CO_(2)通量为57.70 mmol/(m^(2)·d)。Taking an open subsidence lake(Kouzidong mine subsidence lake)in northern Anhui as the research object,the carbon flux from groundwater was determined by the content of dissolved inorganic carbon(DIC)of each endmember,endmember model and CO_(2)diffusion model.The results showed thatδ^(13)C_(DIC)and DIC had similar variation trends in different water bodies,although there was a certain correlation between them,it was not significant in general.Hydrochemical factors were the main reason affecting the spatial distribution ofδ^(13)C_(DIC).DIC in subsidence lake,river water and groundwater originated from CO_(2)in soil and the weathering of carbonate rocks,and most of the DIC in subsidence lake was from the weathering of carbonate rocks.The average CO_(2)flux at the water-air interface reached 164.26 mmol/(m^(2)·d).The CO_(2)flux from river reached 368.31 mmol/(m^(2)·d),and the CO_(2)flux from groundwater was 57.70 mmol/(m^(2)·d).

关 键 词：溶解无机碳 沉陷湖泊 地下水 来源解析 

分 类 号：X523[环境科学与工程—环境工程] X524