Issue 13, 2019

Flow effects on silicate dissolution and ion transport at an aqueous interface

Abstract

Flow effects on chemical reactions at a solid–liquid interface are fundamental to diverse technological applications but remain poorly understood from a molecular perspective. In this work, we demonstrate that the coupling between laminar flow and surface chemistry can be adequately described using classical density functional theory for ion distributions near the surface in conjunction with kinetics modeling and the Navier–Stokes equation. In good agreement with recent experiments, we find that flowing of fresh water over a silica surface may result in drastic changes in the rate of silica dissolution and, consequently, the surface charge density and the interfacial structure. A nonlinear streaming current is predicted when the surface reactions are disturbed by a laminar flow.

Graphical abstract: Flow effects on silicate dissolution and ion transport at an aqueous interface

Article information

Article type
Paper
Submitted
01 Feb 2019
Accepted
06 Mar 2019
First published
06 Mar 2019

Phys. Chem. Chem. Phys., 2019,21, 6970-6975

Author version available

Flow effects on silicate dissolution and ion transport at an aqueous interface

C. Lian, X. Kong, H. Liu and J. Wu, Phys. Chem. Chem. Phys., 2019, 21, 6970 DOI: 10.1039/C9CP00640K

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