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A structural coarse-grained model for clays using simple iterative Boltzmann inversion

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5011817· OSTI ID:1532325
 [1];  [2];  [3];  [3]
  1. Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Cesium-137 is a crucial byproduct of nuclear energy generation and is environmentally threatening due to its long half-life and affinity for naturally occurring micaceous clays. Current experimental observations of illite and phlogopite mica indicate that Cs+ is capable of exchanging with K+ bound in the anhydrous interlayers of layered silicates, forming sharp exchange fronts, leading to interstratification of Cs- and K-illite. We introduce here a coarse-grained (CG) model of the anhydrous illite interlayer developed using iterative Boltzmann inversion that qualitatively and quantitatively reproduces features of a previously proposed feedback mechanism of ion exchange. The CG model represents a 70-fold speedup over all-atom models of clay systems and predicts interlayer expansion for K-illite near ion exchange fronts. Contrary to the longstanding theory that ion exchange in a neighboring layer increases the binding of K in lattice counterion sites leading to interstratification, we find that the presence of neighboring exchanged layers leads to short-range structural relaxations that increase basal spacing and decrease cohesion of the neighboring K-illite layers. We also provide evidence that the formation of alternating Cs- and K-illite interlayers (i.e., ordered interstratification) is both thermodynamically and mechanically favorable compared to exchange in adjacent interlayers.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1532325
Alternate ID(s):
OSTI ID: 1421881
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 22 Vol. 148; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (69)

Chemically Specific Multiscale Modeling of Clay-Polymer Nanocomposites Reveals Intercalation Dynamics, Tactoid Self-Assembly and Emergent Materials Properties journal December 2014
A Thermodynamic Understanding of Clay-Swelling Inhibition by Potassium Ions journal September 2006
A Thermodynamic Understanding of Clay-Swelling Inhibition by Potassium Ions journal September 2006
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Vertical Migration of Radiocesium Fallout in Soil in Fukushima book January 2013
Mesoscale simulation of clay aggregate formation and mechanical properties journal June 2016
Multiscale modeling of swelling clays: A computational and experimental approach journal June 2009
Sorption of cesium on illite: Non-equilibrium behaviour and reversibility journal February 1991
Kinetics of cesium sorption on illite journal March 1992
VMD: Visual molecular dynamics journal February 1996
A pair potential for liquid rubidium from the pair correlation function journal February 1973
A uniqueness theorem for fluid pair correlation functions journal September 1974
Selective and irreversible adsorption mechanism of cesium on illite journal October 2017
Multilevel Summation Method for Electrostatic Force Evaluation journal January 2015
Caesium incorporation and retention in illite interlayers journal May 2015
Identification of the actual cesium-adsorbing materials in the contaminated Fukushima soil journal March 2016
A space–time-ensemble parallel nudged elastic band algorithm for molecular kinetics simulation journal February 2008
Global transition path search for dislocation formation in Ge on Si(001) journal August 2016
On the driving force of cation exchange in clays: Insights from combined microcalorimetry experiments and molecular simulation journal July 2009
Measurement of soil contamination by radionuclides due to the Fukushima Dai-ichi Nuclear Power Plant accident and associated estimated cumulative external dose estimation journal September 2012
Cesium adsorption and distribution onto crushed granite under different physicochemical conditions journal January 2009
Elastic properties prediction of nano-clay reinforced polymer using multi-scale modeling based on a multi-scale characterization journal October 2015
Multilevel summation of electrostatic potentials using graphics processing units journal March 2009
Multiscale micromechanical modeling of polymer/clay nanocomposites and the effective clay particle journal January 2004
Tabulated potentials in molecular dynamics simulations journal July 1999
Experimental and modelling studies of caesium sorption on illite journal October 1999
Half-life measurements at the National Institute of Standards and Technology journal January 2002
Vibrational Spectroscopy and Dynamics of Water journal April 2016
Coarse-Grained Protein Models and Their Applications journal June 2016
Direct Exchange Mechanism for Interlayer Ions in Non-Swelling Clays journal December 2016
Mechanism of Exfoliation and Prediction of Materials Properties of Clay–Polymer Nanocomposites from Multiscale Modeling journal November 2015
Multilevel Summation Method for Electrostatic Force Evaluation journal January 2015
An Ion Diffusion Model in Semi-Permeable Clay Materials journal August 2007
Water Dynamics in Hectorite Clays: Infuence of Temperature Studied by Coupling Neutron Spin Echo and Molecular Dynamics journal April 2011
Uptake of Cesium and Strontium Ions by Artificially Altered Phlogopite journal April 2014
Connecting the Molecular Scale to the Continuum Scale for Diffusion Processes in Smectite-Rich Porous Media journal March 2010
Molecular Models of Hydroxide, Oxyhydroxide, and Clay Phases and the Development of a General Force Field journal January 2004
Hydration Properties and Interlayer Organization of Water and Ions in Synthetic Na-Smectite with Tetrahedral Layer Charge. Part 2. Toward a Precise Coupling between Molecular Simulations and Diffraction Data journal December 2010
Molecular Dynamics Simulations of Structural and Mechanical Properties of Muscovite: Pressure and Temperature Effects
  • Teich-McGoldrick, Stephanie L.; Greathouse, Jeffery A.; Cygan, Randall T.
  • The Journal of Physical Chemistry C, Vol. 116, Issue 28 https://doi.org/10.1021/jp303143s
journal July 2012
Molecular Models of Cesium and Rubidium Adsorption on Weathered Micaceous Minerals journal May 2015
Acid−Base Properties of 2:1 Clays. I. Modeling the Role of Electrostatics journal June 2010
Preferential adsorption of 137Cs to micaceous minerals in contaminated freshwater sediment journal April 1976
First-principles study of illite–smectite and implications for clay mineral systems journal November 2002
Retention of potentially mobile radiocesium in forest surface soils affected by the Fukushima nuclear accident journal December 2012
Predicted spatio-temporal dynamics of radiocesium deposited onto forests following the Fukushima nuclear accident journal September 2013
Cesium adsorption/desorption behavior of clay minerals considering actual contamination conditions in Fukushima journal February 2016
Salt exclusion in charged porous media: a coarse-graining strategy in the case of montmorillonite clays journal January 2009
Improved tangent estimate in the nudged elastic band method for finding minimum energy paths and saddle points journal December 2000
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Representability problems for coarse-grained water potentials journal April 2007
Mesoscale properties of clay aggregates from potential of mean force representation of interactions between nanoplatelets journal April 2014
Beware of density dependent pair potentials journal September 2002
Direct observation of cesium at the interlayer region in phlogopite mica journal November 2013
Finite-size effects in molecular dynamics simulations: Static structure factor and compressibility. I. Theoretical method journal March 1996
Characterization of the frayed edge site of micaceous minerals in soil clays influenced by different pedogenetic conditions in Japan and northern Thailand journal August 2008
Interstratified Clays as Fundamental Particles journal August 1984
Diffusion and retention behaviour of Cs in illite-added compacted montmorillonite journal May 2016
XRD and HRTEM Evidence for Fixation of Cesium Ions in Vermiculite Clay journal April 2012
Potassium Release from Muscovite as Influenced by Particle Size* journal January 1969
Selective Sorption and Fixation of Cations by Clay Minerals: A Review journal January 1972
Ca-K Exchange Reaction and Interstratification in Montmorillonite journal January 1979
Thermodynamic Study of Na-K-Ca Exchange Reactions in Vermiculite journal January 1984
The Cs/K Exchange in Muscovite Interlayers: An Ab Initio Treatment journal January 2001
Diffusion of Ions in Bentonite and Vermiculite1 journal January 1961
Hydration Energy Determines Isovalent Cation Exchange Selectivity by Clay Minerals journal January 2006
Cs–sorption in weathered biotite from Fukushima granitic soil journal January 2015
Global transition path search for dislocation formation in Ge on Si(001) text January 2016
Beware of density dependent pair potentials text January 2002
Mechanism of Strong Affinity of Clay Minerals to Radioactive Cesium: First-Principles Calculation Study for Adsorption of Cesium at Frayed Edge Sites in Muscovite journal March 2013

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