A nonlinear attachment-detachment model with adsorption hysteresis for suspension-colloidal transport in porous media
A nonlinear attachment-detachment model with adsorption hysteresis for suspension-colloidal transport in porous media
复制标题
多孔介质中悬浮胶体传输的具有吸附滞后的非线性附着-脱离模型
DOI：
10.1016/j.jhydrol.2019.124080
复制
发表时间：
2019-11-01
影响因子：
6.4
通讯作者：
Guo, Zhiguang
中科院分区：
文献类型：
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作者：
Bai, Bing;Rao, Dengyu;Guo, Zhiguang
在这项研究中，我们提出了一种具有滞后作用的非线性附着-脱离模型，用于多孔介质中悬浮胶体颗粒（SP）的传输。该模型使用吸附函数和扫描解吸等温线来模拟 SP 的沉积过程。该模型表明，增加或减少渗流速度会导致SPs渗透浓度发生显着变化，这与SPs的吸附滞后和沉积动力学密切相关。研究表明，以前的线性附着-脱离模型可能会导致对多孔介质吸附能力的高估。进行静态沉积测试和使用脉冲注入的动态传输实验来校准传输参数。研究了渗流速度、注入浓度和粒径对输运参数和反应速率常数的影响。还在不同的注入浓度和渗流速度下进行了实验。结果表明，模拟和实验突破曲线（BTC）之间具有良好的一致性。
In this study, we propose a nonlinear attachment-detachment model with hysteresis for the transport of suspension-colloidal particles (SPs) in porous media. The proposed model uses an adsorption function and scanning desorption isotherms to model the deposition process of SPs. This model shows that increasing or decreasing the seepage velocity results in substantial changes in the penetration concentration of SPs, which is closely related to the adsorption hysteresis and the deposition dynamics of SPs. Studies show that previous linear attachment-detachment models probably result in an overestimation of the adsorption capacity of porous media. Static deposition tests and dynamic transport experiments using pulse injection were performed to calibrate the transport parameters. The effects of the seepage velocity, injection concentration and particle size on the transport parameters and reaction rate constant were investigated. Experiments were also performed under variable injection concentrations and seepage velocities. The results show that there is good agreement between the simulated and experimental breakthrough curves (BTCs).