File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Electro-kinetic extraction of contaminants from polluted soil

TitleElectro-kinetic extraction of contaminants from polluted soil
Authors
Issue Date1993
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/wasman
Citation
Waste Management, 1993, v. 13 n. 5-7, p. 539-540 How to Cite?
AbstractElectro-osmosis is an effective driving force which moves fluid through a fine-grained soil of low hydraulic conductivity. When electrodes are installed in a wet soil, fluid will be moved from the anode to the cathode by the applied electric field. Ionic migration will cause ions in the pore fluid of the soil to be migrated by the electric field in directions controlled by the charge of the ions, even if the fluid is stationary. Combining electro-osmosis with ionic migration results in the possibility of electro-kinetic removal of inorganic and organic contaminants from polluted soils. However, other electrochemical reactions, such as electrolysis, ion diffusion, development of pH and osmotic gradients, mineral decomposition, ion exchange, precipitation of salts and secondary minerals, hydrolysis, oxidation, reduction, physical and chemical adsorption, and fabric change, etc., will occur simultaneously. Hence the physics and chemistry involved in the removal mechanisms are very complex and have yet to be understood before the technique can be fully utilized. This paper will present the theoretical and laboratory experimental research being performed at Texas A&M University to better understand these complex transport phenomena. The removal process will involve the coupled flows of fluid, electricity, and contaminants under simultaneously imposed hydraulic, electrical, and chemical gradients. The formalism of non-equilibrium thermodynamics is used for the formulation of the flow processes. The change in pH and the resulting change in chemical state of the contaminants are also included in the theoretical formulation. A new experimental apparatus has been designed, fabricated, and assembled. Experiments are performed on kaolinite consolidated from slurry to evaluate the validity of the theoretical formulation. Moreover, the effects of the following parameters on the viability, feasibility, practicality, and economics of this potential environmental cleanup technology are evaluated: soil type and pore size, type and concentration of contaminants, type of purging solution, cost effectiveness, and other electrochemical effects induced by the applied electric field.
Persistent Identifierhttp://hdl.handle.net/10722/150018
ISSN
2015 Impact Factor: 3.829
2015 SCImago Journal Rankings: 1.764

 

DC FieldValueLanguage
dc.contributor.authorYeung, Albert Ten_US
dc.contributor.authorGopinath, Sreekumaren_US
dc.contributor.authorMenon, Rajendra Men_US
dc.contributor.authorScott, Travis Ben_US
dc.contributor.authorDatla, Subbarajuen_US
dc.date.accessioned2012-06-26T06:01:07Z-
dc.date.available2012-06-26T06:01:07Z-
dc.date.issued1993en_US
dc.identifier.citationWaste Management, 1993, v. 13 n. 5-7, p. 539-540en_US
dc.identifier.issn0956-053Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/150018-
dc.description.abstractElectro-osmosis is an effective driving force which moves fluid through a fine-grained soil of low hydraulic conductivity. When electrodes are installed in a wet soil, fluid will be moved from the anode to the cathode by the applied electric field. Ionic migration will cause ions in the pore fluid of the soil to be migrated by the electric field in directions controlled by the charge of the ions, even if the fluid is stationary. Combining electro-osmosis with ionic migration results in the possibility of electro-kinetic removal of inorganic and organic contaminants from polluted soils. However, other electrochemical reactions, such as electrolysis, ion diffusion, development of pH and osmotic gradients, mineral decomposition, ion exchange, precipitation of salts and secondary minerals, hydrolysis, oxidation, reduction, physical and chemical adsorption, and fabric change, etc., will occur simultaneously. Hence the physics and chemistry involved in the removal mechanisms are very complex and have yet to be understood before the technique can be fully utilized. This paper will present the theoretical and laboratory experimental research being performed at Texas A&M University to better understand these complex transport phenomena. The removal process will involve the coupled flows of fluid, electricity, and contaminants under simultaneously imposed hydraulic, electrical, and chemical gradients. The formalism of non-equilibrium thermodynamics is used for the formulation of the flow processes. The change in pH and the resulting change in chemical state of the contaminants are also included in the theoretical formulation. A new experimental apparatus has been designed, fabricated, and assembled. Experiments are performed on kaolinite consolidated from slurry to evaluate the validity of the theoretical formulation. Moreover, the effects of the following parameters on the viability, feasibility, practicality, and economics of this potential environmental cleanup technology are evaluated: soil type and pore size, type and concentration of contaminants, type of purging solution, cost effectiveness, and other electrochemical effects induced by the applied electric field.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/wasmanen_US
dc.relation.ispartofWaste Managementen_US
dc.titleElectro-kinetic extraction of contaminants from polluted soilen_US
dc.typeArticleen_US
dc.identifier.emailYeung, Albert T:yeungat@hkucc.hku.hken_US
dc.identifier.authorityYeung, Albert T=rp00203en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0027880367en_US
dc.identifier.volume13en_US
dc.identifier.issue5-7en_US
dc.identifier.spage539en_US
dc.identifier.epage540en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYeung, Albert T=7102390361en_US
dc.identifier.scopusauthoridGopinath, Sreekumar=7006558025en_US
dc.identifier.scopusauthoridMenon, Rajendra M=35610039900en_US
dc.identifier.scopusauthoridScott, Travis B=7402144375en_US
dc.identifier.scopusauthoridDatla, Subbaraju=6507052013en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats