Adsorption of Petroleum Hydrocarbons from Crude Oil Polluted Soil Using Agrowaste.

  • E.E. Joseph Department of Chemical Sciences, Hezekiah University Umudi, Imo State, Nigeria
  • Johnpaul Azorji Department of Chemical Sciences, Hezekiah University Umudi, Imo State, Nigeria
  • J. C. Iheanacho Veterinary Research Institute, Vom, Jos, Nigeria
  • C.U. Nwachukwu Department of Biology, Alvan Ikoku Federal College of Education, Owerri Imo State, Nigeria
  • K.S Iheagwam Department of Microbiology, Hezekiah University Umudi Imo State, Nigeria
  • C.J. Okoli Department of Chemical Sciences, Hezekiah University Umudi, Imo State, Nigeria
Keywords: Adsorption, Crude oil, Heavy metals, Agrowaste, Imo State


This study was carried out to ascertain the Adsorption of heavy metals from crude oil-polluted soil using agro-waste. Samples of garden soil with no history of crude oil pollution were spiked with 100mL of Bonny light crude oil and left for two weeks to simulate the condition of a major spill before adding different weights of palm bunch ash (0, P+NOPBA, 50g, 100g, and 150g). Preliminary results revealed alteration of chemical properties of soils, elevated heavy metals levels, and TPH content one month after spiking. Metal content increased significantly from ND (not detected) to Cr (1.41 mg/kg), Pb (1.18 mg/kg), Cd (0.30 mg/kg), and As (1.93 mg/kg) respectively. The initial TPH content was 176.81 mg/kg whereas, one month after spiking with crude oil, the value increased to 1,535.5 mg/kg indicating that the soil sample had undergone alteration concerning TPH. There was a dose-dependent decrease in TPH and heavy metal content of the crude oil-polluted soils with time. Net reductions of total petroleum hydrocarbon concerning treatment levels at the end of the experiment were P+US 1,409 (43.7%), P+50 g 1,320 (72.7%), P+ 100g 1,122 (87.9 %), P+150g 1,043 (98.9%). Overall, the net reduction in heavy metals and TPH was very low in the soil left under natural attenuation than in treated soils. Net reduction of heavy metals (Pb, Cr, Cd, and As) was as follows: P+US (23.7%), (37.8%), (26.9%),(31.8%), P+50 g (85.7%), (88.4%), (86.1%), (77.3%), P+100g (93.9%), (94.6%), (93.5%), (89.1%) and P+150g (98.9%), (99.9%), (98.7%), (93.7%). This study has established a marked degradation of the heavy metal and hydrocarbon contents of soil which indicated that agro-waste could be used for the remediation of crude oil-polluted soil. It is recommended that agro-waste be replaced with conventional fertilizer in the restoration of crudely contaminated soil.


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How to Cite
Joseph, E., Azorji, J., Iheanacho, J. C., Nwachukwu, C., Iheagwam, K., & Okoli, C. (2022). Adsorption of Petroleum Hydrocarbons from Crude Oil Polluted Soil Using Agrowaste. Journal of Environmental Treatment Techniques, 10(4), 284-289.
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