Post-impact Soil Assessments of Crude Oil Spill Site in Kpean Community in Khana LGA (Ogoni) of Rivers State, Nigeria .

Joseph G. Gighi, Franklin b. G. Tanee, Ejikeme Albert

Abstract


A post-impact assessment of soil physico-chemical parameters of crude oil polluted site at Yorla oil field in Kpean community, Khana LGA. (Ogoni) of Rivers State was carried out. Soil samples were randomly collected at two soil depths (0 -15 cm and15 -30 cm) at both the impacted and un-impacted (control) sites. Results showed that crude oil impact increased the total hydrocarbon content (THC) (1276 ±115.6 – 1935 ±119.1 mg/kg) and pH (5.02 ±0.12 – 5.04 ±0.27) of the soil as against 167 ± 22.9 – 170 ± 52.1 mg/kg of the un-impacted site. Soil nitrate, phosphate, total organic carbon (TOC) and total organic matter (TOM) were drastically reduced in the impacted site with values of 36.77 ±7.6 mg/kg, 11.09 ± 2.7 – 14.44 ±1.2mg/kg, 1.96 ± 0.1 – 2.07 ± 0.1 % and 3.33 ± 0.11 - 3.52 ± 0.12 % compared with the un-impacted site of 44.12 ± 0.0 mg/kg, 13.75 ± 2.8 - 15.13 ± 1.4 mg/kg, 2.03 ± 0.2 – 2.22 ± 0.2% and 3.45 ± 0.21 - 3.77 ± 0.16 % correspondingly. There was no significant difference in soil pH (p = 0.05) in both the impacted and un-impacted sites. Therefore crude oil impact alters soil physico-chemical parameters and could be detrimental to the soil ecosystem.


Keywords


soil; hydrocarbon; nutrient content; kpean; crude oil

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