河岸渗滤带含砷地下水环境稳定碳同位素特征  

Stable Carbon Isotope Characteristics of Arsenic-bearing Groundwater Environment in the Riverbank Filtration Zone

作　　者：鹿帅 杨毅梦 尹含灵 苏小四[6] 孙超 LU Shuai;YANG Yi-meng;YIN Han-ling;SU Xiao-si;SUN Chao(Hebei GEO University,Shijiazhuang 050031,China;Hebei Key Laboratory of Geological Resources and Environment Monitoring and Protection,Shijiazhuang 050021,China;Institute of Water Resources and Environment,Jilin University,Changchun 130021,China)

机构地区：[1]河北地质大学河北省水资源可持续利用与产业结构优化协同创新中心,河北石家庄050031 [2]河北地质大学河北省水资源可持续利用与开发实验室,河北石家庄050031 [3]河北地质大学河北省高校生态环境地质应用技术研发中心,河北石家庄050031 [4]河北地质大学水资源与环境学院,河北石家庄050031 [5]河北省地质资源环境监测与保护重点实验室,河北石家庄050021 [6]吉林大学水资源与环境研究所,吉林长春130021

出　　处：《河北地质大学学报》2023年第1期67-72,共6页Journal of Hebei Geo University

基　　金：国家自然科学基金项目(42107100,41372238);河北省水利科研与推广计划项目(2021-37);河北省专业学位研究生教学案例建设项目(KCJSZ2021098);河北省地质资源环境监测与保护重点实验室开放课题(JCYKT202003);河北省水资源可持续利用与产业结构优化协同创新中心开放基金(XTZX202114);河北省大中学生科技创新能力培育专项(22E50150D);河北地质大学科技创新团队项目(KJCXTD-2021-14)。

摘　　要：溶解有机碳(DOC)对砷(As)的生物地球化学过程具有重要影响,为查明河岸渗滤带含砷地下水环境稳定碳同位素特征,识别有机质对含砷地下水形成的影响,进行地下水水化学指标及同位素分析。结果表明:研究区地下水中δ^(13)C_(DOC)值变化范围为-31.95‰~-24.16‰,δ^(13)C_(DIC)值变化范围为-13.19‰~-2.19‰,δ^(13)C_(DIC)相较δ^(13)C_(DOC)富集^(13)C。含水介质δ^(13)C值为(-28±4)‰,地下水中DOC主要来源于内源有机质。δ^(13)C_(DIC)-δ^(13)C_(DOC)与As含量呈现负相关,δ^(13)C_(DIC)与As含量呈现显著负相关,表明有机质的微生物降解促进了As的释放。Dissolved organic carbon(DOC)plays an important role in the biogeochemical process of arsenic(As).In order to find out the stable carbon isotope characteristics of arsenic-bearing groundwater environment in the riverbank filtration zone,and identify the influence of organic matter on the formation of arsenic-bearing groundwater,hydrochemical index and isotope analysis were carried out in this paper.The results showed that theδ^(13)C_(DOC)value in groundwater in the study area ranged from-31.95‰to-24.16‰,and theδ^(13)C_(DIC)value ranged from-13.19‰to-2.19‰.Compared withδ^(13)C_(DOC),δ^(13)C_(DIC)was enriched in^(13)C.Theδ^(13)C value of the aqueous medium was(-28±4)‰,and the DOC in groundwater mainly came from endogenous organic matter.δ^(13)C_(DIC)-δ^(13)C_(DOC)was negatively correlated with As content,andδ^(13)C_(DIC)was significantly negatively correlated with As content,indicating that the microbial degradation of organic matter promoted the release of As.

关 键 词：河岸渗滤带 砷 地下水 稳定碳同位素 

分 类 号：P641[天文地球—地质矿产勘探]