skip to main content

DOE PAGESDOE PAGES

Title: Solute mixing regulates heterogeneity of mineral precipitation in porous media

Here, synchrotron X-ray microtomography was used to track the spatiotemporal evolution of mineral precipitation and the consequent alteration of the pore structure. Column experiments were conducted by injecting CaCl 2 and NaHCO 3 solutions into granular porous media either as a premixed supersaturated solution (external mixing) or as separate solutions that mixed within the specimen (internal mixing). The two mixing modes produced distinct mineral growth patterns. While internal mixing promoted transverse heterogeneity with precipitation at the mixing zone, external mixing favored relatively homogeneous precipitation along the flow direction. The impact of precipitation on pore water flow and permeability was assessed via 3-D flow simulations, which indicated anisotropic permeability evolution for both mixing modes. Under both mixing modes, precipitation decreased the median pore size and increased the skewness of the pore size distribution. Such similar pore-scale evolution patterns suggest that the clogging of individual pores depends primarily on local supersaturation state and pore geometry.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ; ORCiD logo [1]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Civil and Environmental Engineering
  2. Hong Kong Univ. of Science and Technology (HKUST), Shenzhen (China). Marine Environmental Lab. and Shenzhen Research Inst.
Publication Date:
Grant/Contract Number:
FG02-94ER14466; CMMI‐1351534; EAR‐1128799; AC02‐06CH11357
Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 44; Journal Issue: 13; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Research Org:
Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 42 ENGINEERING; mineral precipitation; solute mixing; reactive transport; x-ray microtomography
OSTI Identifier:
1473894
Alternate Identifier(s):
OSTI ID: 1390368

Cil, Mehmet B., Xie, Minwei, Packman, Aaron I., and Buscarnera, Giuseppe. Solute mixing regulates heterogeneity of mineral precipitation in porous media. United States: N. p., Web. doi:10.1002/2017GL073999.
Cil, Mehmet B., Xie, Minwei, Packman, Aaron I., & Buscarnera, Giuseppe. Solute mixing regulates heterogeneity of mineral precipitation in porous media. United States. doi:10.1002/2017GL073999.
Cil, Mehmet B., Xie, Minwei, Packman, Aaron I., and Buscarnera, Giuseppe. 2017. "Solute mixing regulates heterogeneity of mineral precipitation in porous media". United States. doi:10.1002/2017GL073999. https://www.osti.gov/servlets/purl/1473894.
@article{osti_1473894,
title = {Solute mixing regulates heterogeneity of mineral precipitation in porous media},
author = {Cil, Mehmet B. and Xie, Minwei and Packman, Aaron I. and Buscarnera, Giuseppe},
abstractNote = {Here, synchrotron X-ray microtomography was used to track the spatiotemporal evolution of mineral precipitation and the consequent alteration of the pore structure. Column experiments were conducted by injecting CaCl2 and NaHCO3 solutions into granular porous media either as a premixed supersaturated solution (external mixing) or as separate solutions that mixed within the specimen (internal mixing). The two mixing modes produced distinct mineral growth patterns. While internal mixing promoted transverse heterogeneity with precipitation at the mixing zone, external mixing favored relatively homogeneous precipitation along the flow direction. The impact of precipitation on pore water flow and permeability was assessed via 3-D flow simulations, which indicated anisotropic permeability evolution for both mixing modes. Under both mixing modes, precipitation decreased the median pore size and increased the skewness of the pore size distribution. Such similar pore-scale evolution patterns suggest that the clogging of individual pores depends primarily on local supersaturation state and pore geometry.},
doi = {10.1002/2017GL073999},
journal = {Geophysical Research Letters},
number = 13,
volume = 44,
place = {United States},
year = {2017},
month = {6}
}