Numerical solution of the equation governing on bioelectrokinetic process in remediation of clayey soil contaminated with crude oil

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Khataei Behnoosh; MOKHTARANI NADER; GANJIDOUST HOSSEIN

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Modares Civil Engineering journal Year:2018 | Volume:19 | Issue:1 Page(s): 155-167

Download Full-Text

Persian Verion

View:

350

Download:

Cites:

Information Journal Paper

Title

Numerical solution of the equation governing on bioelectrokinetic process in remediation of clayey soil contaminated with crude oil

Author(s)

Khataei Behnoosh | MOKHTARANI NADER | GANJIDOUST HOSSEIN | Issue Writer Certificate

Keywords

Crude oilQ1

Clayey soilQ1

Bioelectrokinetic methodQ1

ModelingQ2

Numerical solutionQ2

Abstract

Removal of petroleum hydrocarbons from soil using electrokinetic method or biological processes has been considered in recent century. The most limiting factors in the electrokinetic process are extreme changes in pH around the electrodes and non-polarity of some pollutants. On the other hand, the key factor of biological treatment is simultaneous presence of microorganisms, pollutants, electron acceptors, and essential nutrients for microorganisms’ growth. But in fine-grained soils with low permeability, it is difficult to uniformly distribute bacteria, electron acceptors and nutrients, or making pollutants available for microorganisms. To solve these problems, Bioelectrokinetic method is used to eliminate the limitations of both biological and electrokinetic processes in treatment of fine-grained soil contaminated with organic compounds. The aim of this study is determining the equations and conditions governing on bioelectrokinetic process in removal of Crude oil from Clayey soil. For this reason, the numerical method of FTCS finite-difference was applied for Modeling the pollutant biodegradation and transmission in Clayey soil under electric field. In order to develop and validate the model, the first step was to set up a bioelectrokinetic system in a laboratory scale. In this study, each test was conducted in cylindrical cell made of Plexiglas with the length and diameter equal to 55 and 5 cm respectively, for 35 days. They were performed in various conditions of pollution amount and electric field intensity in the presence of Pseudomonas putida strain. Experimental results showed the removal efficiency was obtained about 34% in minimum voltage gradient (1. 25 V/cm) and initial concentration of oil (4000mg/kg). While, increasing the voltage gradient and oil initial concentration respectively to 1. 5 V/cm and 10000 mg/kg could remove about 48% of pollutant. After determining and combining the governing equations on the electrokinetic and biodegradation system, the Numerical solution of the equation was coded using Mat-lab software. In suggested mathematical model, the parameters like initial concentration of Crude oil, voltage gradient, time step and spatial step were assumed as variables and parameters related to reactor, soil and pollutant such as the length of reactor, soil porosity and tortuosity, ion mobility, diffusion coefficient and electroosmosis permeability coefficient were considered as constants. In continue, by comparison the result of Numerical solution of the suggested model with the experimental results, the same trend was observed in changes in Crude oil concentration between the two. Because of differences between the model results and laboratory data and to make more accordance between the two, the modifying factor was used as the factor of microorganism transfer under electric field. In this way, a better accordance between them was observed and this difference reduced to minimum. Modeling results showed that electroosmosis, diffusion and electromigration mechanisms, unlike biodegradation, had little impact on the transmission and removal of Crude oil from soil. According to the Numerical solution, similar to bioelectrokinetic data, increasing the initial concentration of Crude oil and voltage gradient caused the increase in removal efficiency of Crude oil. In addition, the model has been able to predict the residual Crude oil concentration after bioelectrokinetic treatment with a good accordance.

Cites

No record.

References

No record.

Cite

APA: Copy

Khataei, Behnoosh, MOKHTARANI, NADER, & GANJIDOUST, HOSSEIN. (2018). Numerical solution of the equation governing on bioelectrokinetic process in remediation of clayey soil contaminated with crude oil. MODARES CIVIL ENGINEERING JOURNAL, 19(1 ), 155-167. SID. https://sid.ir/paper/256650/en

Vancouver: Copy

Khataei Behnoosh, MOKHTARANI NADER, GANJIDOUST HOSSEIN. Numerical solution of the equation governing on bioelectrokinetic process in remediation of clayey soil contaminated with crude oil. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2018;19(1 ):155-167. Available from: https://sid.ir/paper/256650/en

IEEE: Copy

Behnoosh Khataei, NADER MOKHTARANI, and HOSSEIN GANJIDOUST, “Numerical solution of the equation governing on bioelectrokinetic process in remediation of clayey soil contaminated with crude oil,” MODARES CIVIL ENGINEERING JOURNAL, vol. 19, no. 1 , pp. 155–167, 2018, [Online]. Available: https://sid.ir/paper/256650/en

Related Journal Papers