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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 9, No. 1, 2005, pp. 103-106
Bioline Code: ja05019
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 9, No. 1, 2005, pp. 103-106

 en Remediation of Crude Oil Contaminated Soil by Enhanced Natural Attenuation Technique
EBUEHI, O. A. T.; ABIBO, I. B.; SHEKWOLO, P. D.; 2IGISMUND, K. I.; 1ADOKI, A.; OKORO, I. C.

Abstract

The concentrations of nitrogen, phosphorus, total hydrocarbon utilizing bacteria (THUB), total heterotrophic bacteria (THB) and total petroleum hydrocarbon were determined using the remediation by enhanced natural attenuation (RENA) in a crude oil contaminated farmland in Rivers state, Nigeria. A TPH concentration of 1.1004 x104 mg/kg of the sandy soil was achieved after spiking and tilling. There was a reduction in the TPH level from 300mg/kg after 8weeks, to 282mg/kg after 10weeks.No significant reduction in the TPH level was observed after the 10th week. The nitrogen and phosphorus levels of the sandy soil were 24.6 and 22.8mg/kg respectively. This suggests that the nitrogen and phosphorus levels could no longer support biodegradation at the residual TPH levels of 282mg/kg and 22.8mg/kg after spiking and tilling respectively, which further reduced to 0.12mg/kg and 1.7mg/kg respectively after 10 weeks. The total hydrocarbon utilizing bacteria (THUB) increased from 3.0 x 104cfu/g to 8.55x104cfu/g and finally reduced to 5.38 x104cfu/g, while the total heterotrophic bacteria (THB) reduced from 1.22 x108 cfu/g to 5.98 x 105cfu/g. Data of the study indicate that remediation enhanced natural attenuation technique could be employed to remediate a farm settlement contaminated by crude oil. @JASEM

 
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