当前位置：
X-MOL 学术
›
Hydrol. Process.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Natural 222Rn as a tracer of mixing and volatilization in a shallow aquifer during a CO2 injection experiment
Hydrological Processes ( IF 2.8 ) Pub Date : 2020-10-25 , DOI: 10.1002/hyp.13953 Jaeyeon Kim 1 , Seong‐Sun Lee 1 , Seung‐Wook Ha 1 , Won‐Tak Joun 1 , YeoJin Ju 1 , Kang‐Kun Lee 1
Hydrological Processes ( IF 2.8 ) Pub Date : 2020-10-25 , DOI: 10.1002/hyp.13953 Jaeyeon Kim 1 , Seong‐Sun Lee 1 , Seung‐Wook Ha 1 , Won‐Tak Joun 1 , YeoJin Ju 1 , Kang‐Kun Lee 1
Affiliation
|
This study aims to evaluate the application of 222Rn in groundwater as a tracer for monitoring CO2 plume migration in a shallow groundwater system, which is important to detect potential CO2 leakage in the carbon capture and storage (CCS) project. For this research, an artificial CO2‐infused water injection experiment was performed in a shallow aquifer by monitoring hydrogeochemical parameters, including 222Rn. Radon in groundwater can be a useful tracer because of its sensitivity to sudden changes in subsurface environment. To monitor the CO2 plume migration, the data were analysed based on (a) the influence of mixing processes on the distribution of 222Rn induced by the artificial injection experiment and (b) the influence of a carrier gas role by CO2 on the variation of 222Rn. The spatio‐temporal distributions of radon concentrations were successfully explained in association with horizontal and vertical mixing processes by the CO2‐infused water injection. Additionally, the mixing ratios of each monitoring well were calculated, quantitatively confirming the influence of these mixing processes on the distribution of radon concentrations. Moreover, one monitoring well showed a high positive relationship between 222Rn and Total dissolved inorganic carbon (TIC) by the carrier gas effect of CO2 through volatilization from the CO2 plume. It indicated the applicability of 222Rn as a sensitive tracer to directly monitor CO2 leakage. When with a little effect of carrier gas, natural 222Rn in groundwater can be used to compute mixing ratio of CO2‐infused water indicative of CO2 migration pathways. CO2 carrier gas effect can possibly increase 222Rn concentration in groundwater and, if fully verified with more field tests, will pose a great potential to be used as a natural tracer for CO2.
中文翻译：
天然222Rn作为二氧化碳注入实验中浅层含水层中混合和挥发的示踪剂
这项研究旨在评估在地下水中222 Rn作为示踪剂的应用，以监测浅层地下水系统中CO 2羽流的迁移，这对于检测碳捕集与封存（CCS）项目中潜在的CO 2泄漏很重要。对于这项研究，通过监测包括222 Rn在内的水文地球化学参数，在浅层含水层中进行了人工注入CO 2的注水实验。地下水中的由于对地下环境的突然变化敏感，因此可以用作示踪剂。为了监测CO 2羽流的迁移，基于以下数据分析数据：（a）混合过程对222分布的影响人工注入实验诱导的Rn和（b）CO 2载气作用对222 Rn变化的影响。通过注入CO 2注入水成功地解释了水平和垂直混合过程中ra浓度的时空分布。另外，计算每个监测井的混合比，定量确认了这些混合过程对ra浓度分布的影响。此外，一个监测井显示，通过从CO 2挥发而产生的CO 2载气效应，222 Rn与总溶解无机碳（TIC）之间具有高度正相关羽。它表明了222 Rn作为灵敏示踪剂直接监测CO 2泄漏的适用性。当载气影响很小时，地下水中的天然222 Rn可用于计算表明CO 2迁移途径的注入CO 2的水的混合比。CO 2载气的作用可能会增加地下水中222 Rn的浓度，如果通过更多的现场试验进行充分验证，它将具有很大的潜力，可用作天然的CO 2示踪剂。
更新日期：2020-11-05
中文翻译：
天然222Rn作为二氧化碳注入实验中浅层含水层中混合和挥发的示踪剂
这项研究旨在评估在地下水中222 Rn作为示踪剂的应用，以监测浅层地下水系统中CO 2羽流的迁移，这对于检测碳捕集与封存（CCS）项目中潜在的CO 2泄漏很重要。对于这项研究，通过监测包括222 Rn在内的水文地球化学参数，在浅层含水层中进行了人工注入CO 2的注水实验。地下水中的由于对地下环境的突然变化敏感，因此可以用作示踪剂。为了监测CO 2羽流的迁移，基于以下数据分析数据：（a）混合过程对222分布的影响人工注入实验诱导的Rn和（b）CO 2载气作用对222 Rn变化的影响。通过注入CO 2注入水成功地解释了水平和垂直混合过程中ra浓度的时空分布。另外，计算每个监测井的混合比，定量确认了这些混合过程对ra浓度分布的影响。此外，一个监测井显示，通过从CO 2挥发而产生的CO 2载气效应，222 Rn与总溶解无机碳（TIC）之间具有高度正相关羽。它表明了222 Rn作为灵敏示踪剂直接监测CO 2泄漏的适用性。当载气影响很小时，地下水中的天然222 Rn可用于计算表明CO 2迁移途径的注入CO 2的水的混合比。CO 2载气的作用可能会增加地下水中222 Rn的浓度，如果通过更多的现场试验进行充分验证，它将具有很大的潜力，可用作天然的CO 2示踪剂。
京公网安备 11010802027423号