The mechanistic aspects of microbial transport in porous media
The mechanistic aspects of microbial transport in porous media
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DOI：
10.1016/j.colsurfa.2020.125169
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发表时间：
2020-10-20
影响因子：
5.2
通讯作者：
Wan, Kai-Tak
中科院分区：
文献类型：
--
作者：
Sun, Jianfeng;Ran, Ran;Wan, Kai-Tak
一个机械模型的构建，以考虑胶体过滤，通过将基本的单个颗粒和收集器之间的界面力，细菌/颗粒的几何形状和弹性特性，和电解介质的流速。收集器表面上的颗粒粘附来自基于静电双电层和货车德瓦尔斯吸引的DLVO理论，而颗粒脱离取决于流体动力学剪切。传统的填充柱的过滤效率，α，估计通过数值求解控制对流扩散方程，并显示实验依赖于离子浓度和流量的电解质对比经典的胶体过滤理论。采用传统的填充柱试验和自制的微流控装置对点状气单胞菌和解鸟氨拉乌尔菌的模式菌株进行了研究。他们的行为被证明与模型一致。
A mechanistic model is constructed to account for colloidal filtration by incorporating fundamental intersurface forces between individual particle and collector, geometry and elastic properties of bacteria / particles, and flowrate of the electrolytic medium. Particle adhesion on the collector surface is derived from the DLVO theory based on electrostatic double layers and van der Waals attraction, while particle detachment depends on the hydrodynamic shear. Filtration efficiency, alpha, of a conventional packed column is estimated by numerically solving the governing convection-diffusion equation, and is shown experimentally dependent on both ionic concentration and flowrate of the electrolyte contrasting the classical colloid filtration theory. Model bacterial strains of Aeromonas punctata and Raoultella ornithinolytica were investigated using a conventional packed column test and a homemade microfluidic device. Their behavior were shown to be consistent with the model.