Atomic Dislocations and Bond Rupture Govern Dissolution Enhancement under Acoustic Stimulation.

Autor: Tang L; Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States., Dong S; Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States.; Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, United States.; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States., Arnold R; Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States.; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States., La Plante EC; Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, United States., Vega-Vila JC; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States.; Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States., Prentice D; Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States.; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States., Ellison K; Electric Power Research Institute (EPRI), Charlotte, North Carolina 28262-8550, United States., Kumar A; Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States., Neithalath N; School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85281, United States., Simonetti D; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States.; Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States., Sant G; Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States.; Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, United States.; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States.; California Nanosystems Institute (CNSI), University of California, Los Angeles, California 90095, United States., Bauchy M; Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States.; Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2020 Dec 09; Vol. 12 (49), pp. 55399-55410. Date of Electronic Publication: 2020 Dec 01.
DOI: 10.1021/acsami.0c16424
Abstrakt: By focusing the power of sound, acoustic stimulation (i.e., often referred to as sonication) enables numerous "green chemistry" pathways to enhance chemical reaction rates, for instance, of mineral dissolution in aqueous environments. However, a clear understanding of the atomistic mechanism(s) by which acoustic stimulation promotes mineral dissolution remains unclear. Herein, by combining nanoscale observations of dissolving surface topographies using vertical scanning interferometry, quantifications of mineral dissolution rates via analysis of solution compositions using inductively coupled plasma optical emission spectrometry, and classical molecular dynamics simulations, we reveal how acoustic stimulation induces dissolution enhancement. Across a wide range of minerals (Mohs hardness ranging from 3 to 7, surface energy ranging from 0.3 to 7.3 J/m 2 , and stacking fault energy ranging from 0.8 to 10.0 J/m 2 ), we show that acoustic fields enhance mineral dissolution rates (reactivity) by inducing atomic dislocations and/or atomic bond rupture. The relative contributions of these mechanisms depend on the mineral's underlying mechanical properties. Based on this new understanding, we create a unifying model that comprehensively describes how cavitation and acoustic stimulation processes affect mineral dissolution rates.
Databáze: MEDLINE
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