Design and use of a laboratory rig for the study of the chemical-physical effects on aquatic environments of potential seepage from CO 2 storage sites
Design and use of a laboratory rig for the study of the chemical-physical effects on aquatic environments of potential seepage from CO 2 storage sites
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实验室装置的设计和使用，用于研究 CO 2 储存地点潜在渗漏对水生环境的化学物理影响
DOI：
10.1002/ghg.1277
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Caramanna G
中科院分区：
文献类型：
--
作者：
Caramanna G
在海底储存中，二氧化碳被注入海底下的地质结构中，能够将其捕获和保留。即使整个过程被认为是安全的，也必须考虑潜在渗漏的影响，以便对该过程进行可靠的风险评估。这项研究集中在浅水环境中二氧化碳渗漏对沉积物化学和上覆水柱的影响。为了研究这些效应，设计、制造和测试了一台实验台。该钻机的主体单元是一个透明的有机玻璃立式圆柱形容器，底部可以装满泥沙，上部可以装水。二氧化碳以气体的形式从底部通过二氧化碳气瓶供气的喷嘴喷射。传感器用于监测水和沉积物的主要物理化学性质的变化。可以收集气体、水和沉积物样本进行进一步分析。结果表明，系统对注入的二氧化碳反应迅速，沉积物中间隙水的pH值急剧下降；一旦停止注入，记录到恢复到初始值。沉积物上方的水也受到二氧化碳存在的影响；在这种情况下，气水相互作用由上升的鼓泡柱引起的水运动控制。2012美国化学工业协会和John Wiley父子有限公司
In sub‐seabed storage, CO2is injected under the seafloor in geological structures that are able to trap and retain it. Even if the overall procedure is considered safe, the effects of potential seepage must be addressed in order to develop a reliable risk assessment of the process.This study focuses on the effects of CO2seepage on the chemistry of sediments and on the overlying water column in shallow‐water environments. To study these effects, an experimental rig was designed, fabricated, and tested. The main unit of the rig is a transparent Plexiglas vertical cylindrical vessel that can be filled with sediment in the bottom section and water in the upper part. CO2is injected as gas from the bottom through nozzles fed by a CO2cylinder. Sensors are used to monitor the variation of the main physical and chemical properties of water and sediments. Gas, water, and sediment samples can be collected for further analysis.The results highlight a fast response of the system to the injected CO2with a sharp reduction of the pH values of the interstitial water inside the sediments; once the injection stops, a recovery toward the initial values is recorded. The water above the sediment is also affected by the presence of CO2; in this case the gas‐water interaction is controlled by the water movements induced by the rising bubble column. © 2012 Society of Chemical Industry and John Wiley & Sons, Ltd