Tuesday, 14 October 2008

Wseas Transactions

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Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 28-404
Full Name: Ahmad Aryafar
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: Shahrood university of Technology, Faculty of Mining Engineering, P.O.Box.36155-316
Country: IRAN
Tel: (+98) 273-3335509
Tel prefix: 273
Fax: (+98) 273-3335509
E-mail address: aariafar@shahroodut.ac.ir
Other E-mails: fdoulati@shahroodut.ac.ir ,ahariafar@yahoo.com
Title of the Paper: The study of oxygen diffusion process in metallic waste dump: Analytical and Numerical Modeling
Authors as they appear in the Paper: Ahmad Aryafar, Faramarz Doulati ardejani
Email addresses of all the authors: aariafar@shahroodut.ac.ir, fdoulati@shahroodut.ac.ir
Number of paper pages: 10
Abstract: Weathering of pyrite–containing rocks causes the well-known problem of acid rock drainage. Depending on the rate of pyrite oxidation, availability of water and oxidants and buffering capacity of surrounding rocks and sediments, the pH of the drainage is often very low. When the pyrite or other sulphide minerals are exposed to the atmosphere and water, the acid mine drainage was generated. Oxygen can be transported into the waste deposit by three mechanisms: (1) advective transport with water, (2) free ore forced air convection and (3) diffusion in the gaseous and aqueous phases through pores in waste material. Pyrite oxidation and acid mine generation are often controlled by the oxygen diffusion process. So, this research attempts to investigate the variation of oxygen concentration in the pyritic waste dump using analytical and numerical model incorporating PHOENICS computational fluid dynamics software. The obtained results can be used to control and reduce the e!
nvironmental impacts.
Keywords: Numerical modeling, Analytical model, Oxygen diffusion, Waste dump, Sulphide mineral, PHOENICS software
EXTENSION of the file: .pdf
Special (Invited) Session: Verification of numerical modeling results using analytical solution for oxygen diffusion process in sulfide waste dump
Organizer of the Session: 593-132
How Did you learn about congress: Professor Raghu Singh
IP ADDRESS: 85.185.67.254