Impact of CO2 leakage from sub-seabed carbon dioxide storage on sediment and porewater geochemistry
Impact of CO2 leakage from sub-seabed carbon dioxide storage on sediment and porewater geochemistry
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海底二氧化碳储存的二氧化碳泄漏对沉积物和孔隙水地球化学的影响
DOI：
10.1016/j.ijggc.2021.103352
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发表时间：
2021
影响因子：
3.9
通讯作者：
D. Connelly
中科院分区：
文献类型：
--
作者：
A. Lichtschlag;M. Haeckel;David Olierook;Kate Peel;A. Flohr;C. Pearce;C. Marieni;R. James;D. Connelly
海底地质二氧化碳储存被认为是一种气候缓解战略，但储存的二氧化碳泄漏到海洋环境的影响并不为人所知。在这项研究中，模拟了二氧化碳蓄水池通过近地表沉积物的渗漏，以达到北海低渗漏率的目的。现场数据与实验室实验和运输-反应模型相结合，以估计二氧化碳和矿物的溶解速率，并评估与富含二氧化碳的流体接触的金属的动员情况及其对环境的潜在影响。我们发现碳酸盐和硅酸盐矿物与溶解的二氧化碳反应迅速，增加了孔隙水的碱度，并中和了大约5%的注入二氧化碳。钙、锶、钡、锰的释放主要受碳酸盐溶解的控制，而铁、锂、硼、镁、硅的释放主要来自硅酸盐矿物，主要来自较深的沉积层。没有有毒金属从沉积物中释放出来，总体而言，注入的二氧化碳只在距离海底二氧化碳泡沫流1米的地方被检测到。我们的结果表明，二氧化碳在短时间内的低泄漏率对底栖生物环境的影响很小。然而，即使在低CO2泄漏率的情况下，孔隙水成分和温度也是泄漏检测的有效指标。
Sub-seabed geological CO2storage is discussed as a climate mitigation strategy, but the impact of any leakage of stored CO2into the marine environment is not well known. In this study, leakage from a CO2storage reservoir through near-surface sediments was mimicked for low leakage rates in the North Sea. Field data were combined with laboratory experiments and transport-reaction modelling to estimate CO2and mineral dissolution rates, and to assess the mobilization of metals in contact with CO2-rich fluids and their potential impact on the environment. We found that carbonate and silicate minerals reacted quickly with the dissolved CO2, increasing porewater alkalinity and neutralizing about 5% of the injected CO2. The release of Ca, Sr, Ba and Mn was mainly controlled by carbonate dissolution, while Fe, Li, B, Mg, and Si were released from silicate minerals, mainly from deeper sediment layers. No toxic metals were released from the sediments and overall the injected CO2was only detected up to 1 m away from seabed CO2bubble streams. Our results suggest that low leakage rates of CO2over short timescales have minimal impact on the benthic environment. However, porewater composition and temperature are effective indicators for leakage detection, even at low CO2leakage rates.
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影响因子：
5
作者：
C. Marieni;J. Matter;D. Teagle
通讯作者：
C. Marieni;J. Matter;D. Teagle
影响因子：
3.9
作者：
A. Dale;S. Sommer;A. Lichtschlag;D. Koopmans;M. Haeckel;E. Kossel;C. Deusner;P. Linke;J. Scholten;K. Wallmann;M. R. Erk;J. Gros;F. Scholz;M. Schmidt
通讯作者：
A. Dale;S. Sommer;A. Lichtschlag;D. Koopmans;M. Haeckel;E. Kossel;C. Deusner;P. Linke;J. Scholten;K. Wallmann;M. R. Erk;J. Gros;F. Scholz;M. Schmidt
对北海及周边水域海底水库或管道泄漏的二氧化碳的物理化学影响进行小规模建模。
影响因子：
5.8
作者：
Dewar M
通讯作者：
Dewar M
影响因子：
4.2
作者：
Vielstaedte, Lisa;Karstens, Jens;Wallmann, Klaus
通讯作者：
Wallmann, Klaus
海洋环境碳捕获和封存（CCS）监测的适宜性分析和修订策略
影响因子：
3.9
作者：
Lichtschlag A
通讯作者：
Lichtschlag A