Document Details
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Document Type |
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Article In Journal |
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Document Title |
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Modeling Kinetic Adsorption in Porous Media by a Two-State Random Walk Particle Method نمذجة الامتزاز الحركي في الأوساط المنفذة باستخدام طريقة المشي العشوائي الجزيئي ذي الطورين |
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Document Language |
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English |
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Abstract |
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Modeling Kinetic Adsorption In Porous Media by a Two-State Random Walk Particle Method
Amro M. M. Elfeki
Water Resources Dept., Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, KSA, E-mail: amro_elfeki@yahoo.co.uk
Phone: +966-2-6964826, Mobile:+966-50-4919254
Abstract
In this paper we present a stochastic approach to address linear adsorption mechanisms using a two-state particle tracking random walk theory. During reactive solute transport in porous medium particles are assigned two states: either mobile (free) or immobile (adsorbed). By studying the exchange of particles’ states, the mechanism of adsorption can be better understood. The kinetics of the particles is modeled with a Markov chain characterized by a transition probability matrix between the two states. The concept of exchange of particle states of the solute particles is more fundamental than that of considering retardation factor and it is of great significance in modeling various reactive transport mechanisms. A computer code (called ADS_2D) has been developed to perform numerical adsorption experiments. It has been shown from the experiments that adsorption with slow kinetics can not adequately be modeled using a retardation factor. The fundamental analytical solution deviates from the numerical solution, particularly the spreading of the solute plume. This is due to the fact that the fundamental analytical solution does not take into account the extra dispersion due to the kinetic reaction. |
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ISSN |
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1319-1039 |
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Journal Name |
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Meteorology, Environment and Arid Land Agriculture Sciences Journal |
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Volume |
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18 |
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Issue Number |
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1 |
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Publishing Year |
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1428 AH
2007 AD |
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Article Type |
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Article |
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Added Date |
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Wednesday, March 7, 2012 |
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Researchers
| عمرو محمد الفقي | Elfeki, Amro Mohamed | Investigator | Doctorate | aelfeki@kau.edu.sa |
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