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| Title: | Effects of microbial processes on electrolytic and interfacial electrical properties of unconsolidated sediments |
| Author (s): | Abdal Aal, Gamal Z. Atekwana, Estella A. Slater, Lee D. Atekwana, Eliot A. |
| Department/Lab Affiliations: | Geological Sciences & Engineering |
| Keywords: | biological effects exploration geophysics magnetic and electrical methods physical properties of rocks |
| Subject Terms: | Electromagnetism. Groundwater quality. Hydrology. |
| Issue Date: | 2004 |
| Publisher: | American Geophysical Union |
| Citation: | Abdel Aal, Gamal Z., Estella A. Atekwana, Lee D. Slater, and Eliot A. Atekwana. "Effects of Microbial Processes on Electrolytic and Interfacial Electrical Properties of Unconsolidated Sediments.", Geophysical Research Letters, vol. 31, L12505, 2004. |
| Abstract: | The effect of microbial processes on electrical properties of unconsolidated sediments was investigated in a laboratory experiment consisting of biotic and abiotic sand columns. The biotic column (nutrient, diesel and bacteria) showed (a) temporal increase in the real, imaginary, and surface conductivity, and (b) temporal decrease in the formation factor. The abiotic columns (nutrient; and nutrient and diesel) showed no significant changes. Increase in microbial population numbers, decrease in organic carbon source, nitrate, and sulfate and increase in dissolved inorganic carbon and fluid conductivity were indicative of microbial activity in the biotic column. We also measure relative increase in the interfacial electrical properties that exceed relative increase in the electrolytic conductivity. Thus changes in the real and imaginary conductivity were induced by microbial processes. These results suggest that interpretation of geoelectrical data from near surface environments should consider effects of microbial processes. |
| Type: | Article - Journal text |
| In Title: | Geophysical Research Letters |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author can archive with restrictions;Restriction: remove when submitting for publication (if not a personal or departmental web site); Post-print: author can archive; FULL COPYRIGHT INFORMATION: |
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| title | Effects of microbial processes on electrolytic and interfacial electrical properties of unconsolidated sediments |
| contributor.author | Abdal Aal, Gamal Z. |
| contributor.author | Atekwana, Estella A. |
| contributor.author | Slater, Lee D. |
| contributor.author | Atekwana, Eliot A. |
| contributor.deptlab | Geological Sciences & Engineering |
| subject | biological effects |
| subject | exploration geophysics |
| subject | magnetic and electrical methods |
| subject | physical properties of rocks |
| subject.LCSH | Electromagnetism. |
| subject.LCSH | Groundwater quality. |
| subject.LCSH | Hydrology. |
| date.issued | 2004 |
| publisher | American Geophysical Union |
| identifier.citation | Abdel Aal, Gamal Z., Estella A. Atekwana, Lee D. Slater, and Eliot A. Atekwana. "Effects of Microbial Processes on Electrolytic and Interfacial Electrical Properties of Unconsolidated Sediments.", Geophysical Research Letters, vol. 31, L12505, 2004. |
| identifier.pub.URI | |
| description.abstract | The effect of microbial processes on electrical properties of unconsolidated sediments was investigated in a laboratory experiment consisting of biotic and abiotic sand columns. The biotic column (nutrient, diesel and bacteria) showed (a) temporal increase in the real, imaginary, and surface conductivity, and (b) temporal decrease in the formation factor. The abiotic columns (nutrient; and nutrient and diesel) showed no significant changes. Increase in microbial population numbers, decrease in organic carbon source, nitrate, and sulfate and increase in dissolved inorganic carbon and fluid conductivity were indicative of microbial activity in the biotic column. We also measure relative increase in the interfacial electrical properties that exceed relative increase in the electrolytic conductivity. Thus changes in the real and imaginary conductivity were induced by microbial processes. These results suggest that interpretation of geoelectrical data from near surface environments should consider effects of microbial processes. |
| type | Article - Journal |
| type.DCMIType | text |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author can archive with restrictions;Restriction: remove when submitting for publication (if not a personal or departmental web site); Post-print: author can archive; |
| rights.URI | |
| relation.isPartOf | Geophysical Research Letters |
| date.available | 2008-07-29T14:05:40Z |
| identifier.persist.URI |