Soltanian Mohamad Reza, Ritzi Robert W, Dai Zhenxue, Huang Chao Cheng
Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, United States.
EES-16, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Mailstop T003, Los Alamos, NM 87545, United States.
Chemosphere. 2015 Mar;122:235-244. doi: 10.1016/j.chemosphere.2014.11.064. Epub 2014 Dec 19.
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.
物理和化学非均质性对多孔介质中的反应输运有很大影响。影响反应性物质输运的非均质属性示例包括水力传导率（K）和平衡吸附分配系数（Kd）。本文采用邓等人（2013年）的多模态反应性矿物相概念模型和基于拉格朗日的随机理论，以分析具有反应性矿物分层组织的三维各向异性非均质多孔介质中的反应性溶质弥散。使用一个基于实际现场数据的示例来说明反应性溶质弥散的时间演变趋势。结果表明，水力传导率与平衡吸附分配系数之间的相关性确实对反应性溶质弥散有显著影响。各向异性比对反应性溶质弥散没有显著影响。此外，通过敏感性分析，我们研究了改变K和Kd的均值、方差和积分尺度对反应性溶质弥散的影响。
