Potential capture and conversion of CO2 from oceanwater through mineral carbonation

Wen Zhuang; Xiaocheng Song; Min Liu; Qian Wang; Jinming Song; Liqin Duan; Xuegang Li; Huamao Yuan

doi:10.1016/j.scitotenv.2023.161589

Potential capture and conversion of CO₂ from oceanwater through mineral carbonation

Sci Total Environ. 2023 Apr 1:867:161589. doi: 10.1016/j.scitotenv.2023.161589. Epub 2023 Jan 11.

Authors

Wen Zhuang¹, Xiaocheng Song², Min Liu², Qian Wang³, Jinming Song⁴, Liqin Duan⁴, Xuegang Li⁴, Huamao Yuan⁴

Affiliations

¹ Institute of Eco-environmental Forensics, Shandong University, Qingdao, Shandong 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China; Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, China; National Laboratory for Marine Science and Technology, Qingdao, Shandong 266237, China. Electronic address: wzhuang@sdu.edu.cn.
² Institute of Eco-environmental Forensics, Shandong University, Qingdao, Shandong 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China; National Laboratory for Marine Science and Technology, Qingdao, Shandong 266237, China.
³ Qingdao Research Institute of Wuhan University of Technology, Qingdao, Shandong 266237, China.
⁴ Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, China; National Laboratory for Marine Science and Technology, Qingdao, Shandong 266237, China.

PMID: 36640885
DOI: 10.1016/j.scitotenv.2023.161589

Abstract

Carbon dioxide (CO₂) emitted by human activities not only brings about a serious greenhouse effect but also accelerates global climate change. This has resulted in extreme climate hazards that can obstruct human development in the near future. Hence, there is an urgent need to achieve carbon neutrality by increasing negative emissions. The ocean plays a vital role in absorbing and sequestering CO₂. Current research on marine carbon storage and sink enhancement mainly focuses on biological carbon sequestration using carbon sinks (macroalgae, shellfish, and fisheries). However, seawater inorganic carbon accounts for more than 95 % of the total carbon in marine carbon storage. Increasing total alkalinity at a constant dissolved inorganic carbon shifts the balance of existing seawater carbonate system and prompts a greater absorption of atmospheric CO₂, thereby increasing the ocean's "carbon sink". This review explores two main mechanisms (i.e., enhanced weathering and ocean alkalinization) and materials (e.g., silicate rocks, metal oxides, and metal hydroxides) that regulate marine chemical carbon sink (MCCS). This work also compares MCCS with other terrestrial and marine carbon sinks and discusses the implementation of MCCS, including the following aspects: chemical reaction rate, cost, and possible ecological and environmental impacts.

Keywords: Anthropogenic CO(2); Carbon capture and storage; Carbon neutrality; Environment management; Inorganic carbon; Ocean carbon sink.

Publication types

Review