Phase evolution and mesostructural transformation of multi-metal carbonates under CO 2 exposure via neutral-pH co-precipitation

Environmental Technology 2026

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Authors: Jun Hwan Jang, Jae Gu Jung, Jun Hyeok Kang, Yu Jin Kim, J. Kim, Ho Bum Park, Si-Hyun Do
DOI: 10.1080/09593330.2026.2635045
Cited by: 0
References: 63

Abstract

Multi-metal carbonates (MMCs) containing Mn2+, Fe2+, Ca2+, and Mg2+ were synthesised via a Na2CO3-assisted co-precipitation process at 50°C under mildly alkaline pH (∼9.5) conditions. Na2CO3 acted as both the carbonate source and a mild pH buffer, facilitating the formation of complex carbonate and hydroxide phases. Structural analysis (XRD, FTIR, and XPS) revealed that MMCs are composites of single and binary carbonates, layered double hydroxides (LDHs), and hydromagnesite. Upon CO2 exposure, selective dissolution of CaMn(CO3)2 and hydromagnesite occurred without reprecipitation of CaCO3 or MgCO3 phases due to acidic pH (

Fields of Study & Subjects

CO2 Sequestration and Geologic Interactions Carbon Dioxide Capture Technologies Carbon dioxide utilization in catalysis

Publication details

Journal / source
Environmental Technology
Volume
47
Issue
11
Pages
1815–1827
Publication date
25 February 2026
Language
EN