Zhu et al. (2024): Sustainable carbon sequestration via olivine based ocean alkalinity enhancement in the east and South China Sea: Adhering to environmental norms for nickel and chromium

Tianqiang Zhu, Liwen Zheng, Feng Li, Jihua Liu, Wen Zhuang IN: Science of The Total Environment, 930, 172853, https://doi.org/10.1016/j.scitotenv.2024.172853

This study aims to evaluate the feasibility and potential of olivine-based ocean alkalinity enhancement (OAE) for the removal of atmospheric CO₂ and its storage in seawater as bicarbonates in the East and South China Seas (ESCS). A particular focus is placed on the potential ecological impacts arising from the release of nickel (Ni) and chromium (Cr) during the olivine weathering process. The authors considered two extreme scenarios: one where Ni and Cr are entirely retained in seawater, and another where they are completely deposited in sediments.

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