Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria
Hydrocarbon impacts on subsurface environmental systems occur due to leaked buried pipelines, petroleum facilities sabotage and oil spills during exploration, production, and transportation. 2D geoelectric investigation was carried out on soils of hydrocarbon impacted site in Alode community, Eleme...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024
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| Online Access: | http://psasir.upm.edu.my/id/eprint/114547/ http://psasir.upm.edu.my/id/eprint/114547/1/114547.pdf |
| _version_ | 1848866525744726016 |
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| author | Ahmed, Nurudeen Onomhoale Nik Daud, Nik Norsyahariati Okunlola, Ipoola Ajani |
| author_facet | Ahmed, Nurudeen Onomhoale Nik Daud, Nik Norsyahariati Okunlola, Ipoola Ajani |
| author_sort | Ahmed, Nurudeen Onomhoale |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Hydrocarbon impacts on subsurface environmental systems occur due to leaked buried pipelines, petroleum facilities sabotage and oil spills during exploration, production, and transportation. 2D geoelectric investigation was carried out on soils of hydrocarbon impacted site in Alode community, Eleme Local Government Area of Rivers State, Central Niger Delta, Nigeria. This was imperative due to the right-of-way spill along a sabotaged petroleum flow line that has been identified for remediation. This study employed a PASI 16 GL earth resistivity meter for Electrical Resistivity Tomography (ERT) with established 5 Wenner-4 electrode array survey lines consisting of 290 horizontal electrical profiles (HEP) probes. The survey was done in a grid format over 100 m lines at 1.5 m, 3 m, 6 m, 9 m, 12 m, and 15 m constant spacing to acquire high-resolution 2D geoelectric data. ERT data inversion was performed using GS RES2DINV and AGI Earth Imager software's to generate 2D resistivity subsurface imageries to map and delineate the hydrocarbon contaminations. The results showed resistivity values from 600 Ω-m to above 3500 Ω-m denoted impacted areas, extending beyond the maximum target depth of 6 m, as pertinent for soil excavation procedure during ex-situ remediation within the locality. ERT profiles displayed evident spill geometries at lines 1, 2 and 3 with only significant presence from below 2 m at lines 4 and 5. The result confirms the horizontal direction and vertical trajectory of the spill through a porous medium-grained sandy layer, providing information for impacted area zoning, conducting risk assessments, and designing and implementing appropriate remediation actions. |
| first_indexed | 2025-11-15T14:22:00Z |
| format | Article |
| id | upm-114547 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:22:00Z |
| publishDate | 2024 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1145472025-03-10T01:56:34Z http://psasir.upm.edu.my/id/eprint/114547/ Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria Ahmed, Nurudeen Onomhoale Nik Daud, Nik Norsyahariati Okunlola, Ipoola Ajani Hydrocarbon impacts on subsurface environmental systems occur due to leaked buried pipelines, petroleum facilities sabotage and oil spills during exploration, production, and transportation. 2D geoelectric investigation was carried out on soils of hydrocarbon impacted site in Alode community, Eleme Local Government Area of Rivers State, Central Niger Delta, Nigeria. This was imperative due to the right-of-way spill along a sabotaged petroleum flow line that has been identified for remediation. This study employed a PASI 16 GL earth resistivity meter for Electrical Resistivity Tomography (ERT) with established 5 Wenner-4 electrode array survey lines consisting of 290 horizontal electrical profiles (HEP) probes. The survey was done in a grid format over 100 m lines at 1.5 m, 3 m, 6 m, 9 m, 12 m, and 15 m constant spacing to acquire high-resolution 2D geoelectric data. ERT data inversion was performed using GS RES2DINV and AGI Earth Imager software's to generate 2D resistivity subsurface imageries to map and delineate the hydrocarbon contaminations. The results showed resistivity values from 600 Ω-m to above 3500 Ω-m denoted impacted areas, extending beyond the maximum target depth of 6 m, as pertinent for soil excavation procedure during ex-situ remediation within the locality. ERT profiles displayed evident spill geometries at lines 1, 2 and 3 with only significant presence from below 2 m at lines 4 and 5. The result confirms the horizontal direction and vertical trajectory of the spill through a porous medium-grained sandy layer, providing information for impacted area zoning, conducting risk assessments, and designing and implementing appropriate remediation actions. Elsevier 2024 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/114547/1/114547.pdf Ahmed, Nurudeen Onomhoale and Nik Daud, Nik Norsyahariati and Okunlola, Ipoola Ajani (2024) Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria. Physics and Chemistry of the Earth, 136. art. no. 103726. pp. 1-11. ISSN 1474-7065; eISSN: 1474-7065 https://linkinghub.elsevier.com/retrieve/pii/S1474706524001840 10.1016/j.pce.2024.103726 |
| spellingShingle | Ahmed, Nurudeen Onomhoale Nik Daud, Nik Norsyahariati Okunlola, Ipoola Ajani Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title | Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title_full | Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title_fullStr | Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title_full_unstemmed | Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title_short | Geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at Alode, Central Niger Delta, Nigeria |
| title_sort | geoelectrical soil mapping for subsurface hydrocarbon contaminant characterization and remediation site zoning at alode, central niger delta, nigeria |
| url | http://psasir.upm.edu.my/id/eprint/114547/ http://psasir.upm.edu.my/id/eprint/114547/ http://psasir.upm.edu.my/id/eprint/114547/ http://psasir.upm.edu.my/id/eprint/114547/1/114547.pdf |