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Title: Structure and reactivity of the calcite–water interface

Journal Article · · Journal of Colloid and Interface Science
 [1];  [2];  [1];  [3];  [1];  [4]
  1. Karlsruher Inst. für Technologie, Karlsruhe (Germany)
  2. Univ. of Alaskan, Fairbanks, AK (United States)
  3. Univ. of Chicago, IL (United States). GeoSoilEnviroCars
  4. Forschungszentrum Julich (Germany). Inst. für Energieforschung

The zetapotential of calcite in contact with aqueous solutions of varying composition is determined for pre-equilibrated suspensions by means of electrophoretic measurements and for non-equilibrium solutions by means of streaming potential measurements. Carbonate and calcium are identified as charge determining ions. Studies of the equilibrium solutions show a shift of isoelectric point with changing CO2 partial pressure. Changes in pH have only a weak effect in non–equilibrium solutions. The surface structure of (104) faces of single crystal calcite in contact to solutions corresponding to those of the zetapotential investigations is determined from surface diffraction measurements. The results reveal no direct indication of calcium or carbonate inner-sphere surface species. The surface ions are found to relax only slightly from their bulk positions; the most significant relaxation is a ~4° tilt of the surface carbonate ions towards the surface. Two ordered layers of water molecules are identified, the first at 2.35 ± 0.05 Å above surface calcium ions and the second layer at 3.24 ± 0.06 Å above the surface associated with surface carbonate ions. A Basic Stern surface complexation model is developed to model observed zetapotentials, while only considering outer–sphere complexes of ions other than protons and hydroxide. The Basic Stern SCM successfully reproduces the zetapotential data and gives reasonable values for the inner Helmholtz capacitance, which are in line with the Stern layer thickness estimated from surface diffraction results.

Research Organization:
Univ. of Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; National Science Foundation (NSF)
Grant/Contract Number:
FG02-94ER14466; AC02-06CH11357
OSTI ID:
1509824
Journal Information:
Journal of Colloid and Interface Science, Vol. 354, Issue 2; ISSN 0021-9797
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 212 works
Citation information provided by
Web of Science

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Cited By (18)

Calcite surface structure and reactivity: molecular dynamics simulations and macroscopic surface modelling of the calcite–water interface journal January 2012
Evolution of calcite surface reconstruction and interface adsorption of calcite-CO 2 with temperature journal November 2018
On Permeability Prediction From Complex Conductivity Measurements Using Polarization Magnitude and Relaxation Time journal May 2018
Zeta potential in oil-water-carbonate systems and its impact on oil recovery during controlled salinity water-flooding journal November 2016
Zeta potential of porous rocks in contact with mixtures of monovalent and divalent electrolytes journal March 2019
Response of Non-Polar Oil Component on Low Salinity Effect in Carbonate Reservoirs: Adhesion Force Measurement Using Atomic Force Microscopy journal December 2019
Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms journal May 2018
Three-dimensional hydration layer mapping on the (10.4) surface of calcite using amplitude modulation atomic force microscopy journal July 2014
Impact of Initial Wettability and Injection Brine Chemistry on Mechanical Behaviour of Kansas Chalk journal March 2019
Nucleation in confinement generates long-range repulsion between rough calcite surfaces journal June 2019
Electrokinetic Characterization of Natural Stones Coated with Nanocomposites for the Protection of Cultural Heritage journal September 2018
Surface chemistry considerations in the flotation of rare-earth and other semisoluble salt minerals journal February 2013
Optimizing a flow-through X-ray transmission cell for studies of temporal and spatial variations of ion distributions at mineral–water interfaces journal November 2012
Electrokinetic Characterization of Natural Stones Coated with Nanocomposites for the Protection of Cultural Heritage journal September 2018
Nucleation in Confinement Generates Long-range Repulsion between Rough Calcite Surfaces text January 2019
Reconsidering Calcium Dehydration as the Rate-Determining Step in Calcium Mineral Growth journal October 2019
Evaluating physicochemical properties of crude oil as indicators of low-salinity–induced wettability alteration in carbonate minerals journal February 2020
Novel Approach to Study the Impact of Asphaltene Properties on Low Salinity Flooding conference October 2020

Figures / Tables (21)


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