Nickel mobilization during single-stage aqueous mineral carbonation of serpentinized peridotite at 185 °C and PCO₂ of 100 bar

Cieślik, Błażej ORCID: https://orcid.org/0000-0002-7509-5230; Lacinska, Alicja; Pietranik, Anna ORCID: https://orcid.org/0000-0003-3990-8721; Róziewicz, Maciej ORCID: https://orcid.org/0000-0003-1203-9415; Pędziwiatr, Artur ORCID: https://orcid.org/0000-0002-6253-4302; Turniak, Krzysztof ORCID: https://orcid.org/0000-0002-0339-1575; Łamacz, Agata; Kierczak, Jakub ORCID: https://orcid.org/0000-0002-3243-6832. 2025 Nickel mobilization during single-stage aqueous mineral carbonation of serpentinized peridotite at 185 °C and PCO₂ of 100 bar. Journal of CO2 Utilization, 97, 103119. 10.1016/j.jcou.2025.103119

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Official URL: https://doi.org/10.1016/j.jcou.2025.103119

Abstract/Summary

Forsterite-rich ultramafic rocks, such as serpentinized peridotites, are considered highly promising natural materials for mineral carbonation – a carbon capture and storage (CCS) technique aimed at reducing atmospheric carbon dioxide (CO2) by sequestering carbon as carbonate minerals. These rocks are commonly characterized by a high content of divalent cations, including nickel (Ni2 +), whose behavior and mobility during mineral carbonation remain insufficiently understood. This issue is critical, as the large-scale application of mineral carbonation may pose ecotoxicological risks by mobilizing specific metallic elements naturally occurring in ultramafic rocks. To elucidate possible Ni mobility during single-stage aqueous mineral carbonation, 15 g of powdered serpentinized peridotite was carbonated in a batch-type reactor for 96 hours at 185°C and a PCO₂ of 100 bar. The experiment resulted in the dissolution of forsterite and the extensive crystallization of magnesite, demonstrating that the serpentinized peridotite is a highly effective natural material for permanent CO2 storage in the single-stage carbonation processes. Nickel released during the dissolution of forsterite (approximately 50 % of the whole Ni budget) was mainly incorporated in newly formed Ni-rich phyllosilicates (more than 98 %) and a small portion was mobilized into the post-carbonation fluid (less than 2 %), reaching a concentration of approximately18 mg/kg after 96 hours. The presence of Ni in newly crystallized magnesite crystals has not been detected. These results suggest that the behavior of Ni during single-stage mineral carbonation is complex and requires careful monitoring to prevent potential negative impacts on the natural environment.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.jcou.2025.103119
ISSN:	22129820
Date made live:	04 Jul 2025 10:28 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/539787

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/j.jcou.2025.103119

ISSN:

22129820

Date made live:

04 Jul 2025 10:28 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/539787