Sulfate-Controlled Heterogeneous CaCO3 Nucleation and Its Non-linear Interfacial Energy Evolution
Journal Article
·
· Environmental Science and Technology
- Washington Univ., St. Louis, MO (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Unveiling the effects of an environmental abundant anion “sulfate” on the formation of calcium carbonate (CaCO3) is essential to understand the formation mechanisms of biominerals like corals and brachiopod shells, as well as the scale formation in desalination systems. However, it was experimentally challenging to elucidate the sulfate–CaCO3 interactions at the explicit first step of CaCO3 formation: nucleation. In addition, there is limited quantitative information on the precise control of nucleation kinetics. Here, heterogeneous CaCO3 nucleation is monitored in real time as a function of sulfate concentrations (0–10 mM Na2SO4) using synchrotron-based grazing incidence X-ray scattering techniques. The results showed that sulfate can be incorporated in the nuclei, resulting in a nearly 90% decrease in the CaCO3 nucleation rate, causing a 120% increase in the CaCO3 nucleus size, and inhibiting the vaterite-to-calcite phase transformation. Moreover, this work quantitatively relates sulfate concentrations to the effective interfacial energies of CaCO3 and finds a non-linear trend, suggesting that CaCO3 heterogeneous nucleation is more sensitive at a low sulfate concentration. This study can be readily extended to study other additives and obtain quantitative relationships between additive concentrations and CaCO3 interfacial energies, a key step toward achieving natural and engineered controls on CaCO3 nucleation.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- Energy Frontier Research Center
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357
- OSTI ID:
- 1840567
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 16 Vol. 55; ISSN 0013-936X
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Process-Specific Effects of Sulfate on CaCO3 Formation in Environmentally Relevant Systems
In Situ Determination of Interfacial Energies between Heterogeneously Nucleated CaCO 3 and Quartz Substrates: Thermodynamics of CO 2 Mineral Trapping
Salinity-Induced Reduction of Interfacial Energies and Kinetic Factors during Calcium Carbonate Nucleation on Quartz
Journal Article
·
Wed May 25 20:00:00 EDT 2022
· Environmental Science and Technology
·
OSTI ID:1962067
In Situ Determination of Interfacial Energies between Heterogeneously Nucleated CaCO 3 and Quartz Substrates: Thermodynamics of CO 2 Mineral Trapping
Journal Article
·
Tue Jan 01 23:00:00 EST 2013
· Environmental Science and Technology
·
OSTI ID:1080659
Salinity-Induced Reduction of Interfacial Energies and Kinetic Factors during Calcium Carbonate Nucleation on Quartz
Journal Article
·
Mon May 13 20:00:00 EDT 2019
· Journal of Physical Chemistry. C
·
OSTI ID:1547040