title: Reactive solute transport in physically and chemically heterogeneous porous media with multimodal reactive mineral facies: the Lagrangian approach.
abstract: Physical and chemical heterogeneities have a large impact on reactive transport in porous media. Examples of heterogeneous attributes affecting reactive mass transport are the hydraulic conductivity (K), and the equilibrium sorption distribution coefficient (Kd). This paper uses the Deng et al. (2013) conceptual model for multimodal reactive mineral facies and a Lagrangian-based stochastic theory in order to analyze the reactive solute dispersion in three-dimensional anisotropic heterogeneous porous media with hierarchical organization of reactive minerals. An example based on real field data is used to illustrate the time evolution trends of reactive solute dispersion. The results show that the correlation between the hydraulic conductivity and the equilibrium sorption distribution coefficient does have a significant effect on reactive solute dispersion. The anisotropy ratio does not have a significant effect on reactive solute dispersion. Furthermore, through a sensitivity analysis we investigate the impact of changing the mean, variance, and integral scale of K and Kd on reactive solute dispersion.
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, United States. Electronic address: m.rezasoltanian@gmail.com.
authors.forename: Mohamad Reza
authors.initials: MR
authors.lastname: Soltanian
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, United States. Electronic address: robert.ritzi@wright.edu.
authors.forename: Robert W
authors.initials: RW
authors.lastname: Ritzi
authors.affiliation: EES-16, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Mailstop T003, Los Alamos, NM 87545, United States. Electronic address: daiz@lanl.gov.
authors.forename: Zhenxue
authors.initials: Z
authors.lastname: Dai
authors.affiliation: Department of Mathematics and Statistic, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH 45435-0001, United States. Electronic address: chaocheng.huang@wright.edu.
authors.forename: Chao Cheng
authors.initials: CC
authors.lastname: Huang
mesh_terms: D016880:Anisotropy; D008903:Minerals / Q000737:chemistry*; D008962:Models, Theoretical; D009038:Motion; D016062:Porosity; D013269:Stochastic Processes; D014867:Water / Q000737:chemistry
chemical_list: D008903:Minerals; D014867:Water
keywords: Hierarchical porous media; Lagrangian-based theory; Reactive mineral facies; Reactive transport