Bioremediation of Oil Polluted Arable Soil by Enhanced Natural Attenuation
Journal Title: Universal Journal of Environmental Research and Technology - Year 2013, Vol 3, Issue 4
Abstract
This study evaluated the efficacy of microorganisms in total hydrocarbon (THC) degradation under the influence of tillage, nutrient supply (NPK Fertilizer) and liming. The treatment options were: Reduced tilling + Application of fertilizer (treatment A); soil mixing (contaminated + uncontaminated soils) + Application of fertilizer + conventional tilling (Treatment B); Application of fertilizer + conventional tilling (treatment C); then control. The second segment of the treatment options consisted of replication of treatments A, B and C and the addition of lime. The findings show that treatment C1 (Application of fertilizer + convention tilling + liming) recorded the highest population of hydrocarbon utilizing bacteria (HUB) of 67,000 x 103 cfu/g with 93% reduction of THC. This was followed by treatment B1 (soil mixing (contaminated + uncontaminated soils)) + Application of fertilizer + conventional tilling + liming) with HUB count of 56,000 x 103 cfu/g and percentage THC reduction of 86%; and then treatment C having HUB of 48,000 x 103 cfu/g and THC reduction of 75%. Results of all the options were significantly (P=0.05) higher than the control.
Authors and Affiliations
Okeke P. N. and Egbo A. C.
Keywords
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