Precipitation of protodolomite facilitated by sulfate-reducing bacteria: The role of capsule extracellular polymeric substances
Open accessAbstract
Abstract The origin of dolomite has long puzzled geologists. It has recently been documented that sulfate-reducing bacteria (SRB) are capable of catalyzing the formation of protodolomite, a previously proposed precursor of ordered sedimentary dolomite. However, the catalytic mechanism of SRB remains incompletely understood. This experimental study is aimed at probing the effect of capsule extracellular polymeric substances (capsule EPS) from SRB on the crystallization of protodolomite in vivo. The capsule EPS tested herein was isolated from a protodolomite-mediating SRB, Desulfotomaculum ruminis, and added into a solution wherein the degree of oversaturation was close to the growth medium of D. ruminis at stationary phase. The solid products were characterized with X-ray diffraction (XRD), Raman spectroscopy and, scanning and transmission electron microscopy (SEM and TEM). Our results indicated that aragonite emerged in the reactors without capsule EPS, while Ca-Mg carbonates (Mg-calcite and protodolomite) were produced in the systems amended with capsule EPS. The incorporation amount of Mg2+ in Ca-Mg carbonates was enhanced with the increasing concentration of capsule EPS. The predominant occurrence of protodolomite was found in the reactor with 140 mg/L capsule EPS. These resulting protodolomites were spherical in shape, and composed of numerous nano-particles. The catalytic influence of capsule EPS on the precipitation of protodolomite might be attributed to their strong Mg2+ binding capacity, potentially diminishing Mg-hydration, which is a potent inhibitor of protodolomite crystallization. The results of Fourier transformation infrared (FT-IR) spectra showed that Mg2+ was bonded with carboxyl and hydroxyl groups on capsule EPS. This inferred adsorption capacity of capsule EPS was also supported by new calculations of complexation chemistry between Mg-H2O complex and organic compounds present in capsule EPS.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Very high-Mg calcite is a key precursor mineral during dolomite formation.
“many scholars believe that very high-Mg calcite is a key precursor mineral during dolomite formation [57,67,79,93,141].”
From Thermodynamic and Kinetic Studies of Dolomite Formation: A Review (2023) · cites this paper as [93]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
The citation lists haven’t been fetched yet
References 83 · Cited by 68
Research works printed but not linked: 4
- [43]43. Morse, J.W., Wang, Q., Tsio, M.Y., 1997. Influences of temperature and Mg:Ca ratio on CaCO3 precipitates from seawater. Geology 25(1), 85-87.
- [62]62. Sommerdijk, N.A.J.M., de With, G., 2008. Biomimetic CaCO3 mineralization using designer molecules and interfaces. Chem. Rev. 108(11), 4499-4550.
- [64]64. Stumm, W., Morgan, J.J., 1996. Aquatic Chemistry. Wiley, New York, 1022 pp.
- [76]76. Xu, J., Yan, C., Zhang, F., Konishi, H., Xu, H., Teng, H.H., 2013. Testing the cation- hydration effect on the crystallization of Ca-Mg-CO3 systems. Proc. Natl. Acad. Sci. 110(44), 17750-17755.
- Authors
- Liu, D., Fan, Q., Papineau, D., Yu, N., Chu, Y., Wang, H., Qiu, X., & Wang, X.
- Affiliations
- China University of Geosciences (CN)
- London Centre for Nanotechnology (GB)
- Chinese Academy of Sciences (CN)
- Wuhan University of Science and Technology (CN)
- Corresponding author
- Liu, Deng
- Venue
- Chemical Geology
- Publisher
- Elsevier BV
- Published
- 2020-02
- Volume
- 533
- Pages
- 119415
- ISSN
- 0009-2541 (ISSN-L)
- OpenAlex
- W2989746756
- Semantic Scholar
- 75af57ebc671568d3750e1361a74881165e5d555
- Cited by
- 68
- References
- 83
- Citations by year
- 2026: 11 · 2025: 14 · 2024: 12 · 2023: 12 · 2022: 9 · 2021: 8 · 2020: 2
- FWCI
- 1.35
- Type
- journal article
- Language
- en
- Open access
- green
- discovery.ucl.ac.uk
- Locations
- Chemical Geology (publishedVersion)
- UCL Discovery (University College London) (submittedVersion)
- Funders
- China University of Geosciences, Wuhan (CUGCJ1703)
- National Natural Science Foundation of China (41502317, 41572323, 41772362)
- Higher Education Discipline Innovation Project
- Fundamental Research Funds for the Central Universities
- Chinese Academy of Sciences (B08030, XDB26000000)
- Topics
- Physical Sciences › Materials Science › Biomaterials › Calcium Carbonate Crystallization and Inhibition
- Physical Sciences › Environmental Science › Environmental Engineering › Microbial Applications in Construction Materials
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Keywords
- protodolomite, dolomite origin, sulfate-reducing bacteria, bacterial capsule, extracellular polymeric substances, dolomite precipitation, magnesium adsorption, aragonite
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
