(+234) 8167-784-761,
info@confluencejournal.com.ng

Integrating Electrical Resistivity Tomography and Geochemical analysis to assess Hydrocarbon Contaminated Soil in Warri Niger Delta Nigeria

Integrating Electrical Resistivity Tomography and Geochemical analysis to assess Hydrocarbon Contaminated Soil in Warri Niger Delta Nigeria

  ABSTRACT
Abstract:Electrical resistivity tomography (ERT) and geochemical analysis were integrated to assess hydrocarbon contaminated soil in Warri area. Earth resistivity meter was used for the electrical imaging of the subsurface. Physico-chemical and geochemical parameters of groundwater samples were determined. The ERT results shows that the subsurface is saturated with hydrocarbon of resistivity values ranging from 11 – 5902 Ohm-m to the depth of 25m in most parts, reflecting varying degree of conductivity associated with changing lithology and fluid type. This low conductivity contaminant could be attributed to hydrocarbon incursion. The water samples show mild acidity with pH values in the range 4.3-6.6. Total Dissolved Solids (TDS) is low 69.37-89.32mg/L and conductivity ranges from 119.60-153.50 ?S/cm. Iron content is fairly high (0.485-0.961mg/L). Groundwater samples analysis using ultra violet (UV) detector and gas chromatography (GC) show that Total Petroleum Hydrocarbons (TPH) as oil and grease is very low (< 0.01 mg/L and < 0.031mg/L) respectively. This further indicates the contamination of shallow aquifer in the study area. The results have shown that the study area has been degraded. It is recommended that geophysical investigation be carried out before drilling of wells. Boreholes should be drilled to the depth of at least 40m beneath the surface to exploit for groundwater, and periodic laboratory test of groundwater samples.
MORE DETAILS
0 08 Feb, 2022
pg:
Confluence Journals
Contri. 3+
key Words: Keywords: Contamination; degradation; groundwater; imaging; resistivity.
Key Contributors: 1Uchegbulam Okezie.,2Opeh Raymond and 3Ogueh Desiree.