Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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POST-REMEDIATION ASSESSMENT OF THE QUALITY OF OIL SPILLAGE IMPACTED SOILS IN MGBODO ALUU, IKWERRE LOCAL GOVERNMENT AREA, RIVERS STATE
Chinedu E Ihejirika, Chinedu E Ihejirika

Last modified: 2015-10-30

Abstract


This study was carried out to assess of the quality of remediated oil spillage impacted soils in Mgbodo Aluu, Ikwerre Local Government Area, Rivers State. Remediated soil samples were collected with the aid of a well calibrated stainless steel hand dug soil auger (2.50 cm in diameter) from six (6) sampling points with a control sample from a non-contaminated site at the depth of 0-30 cm and were immediately transported to the laboratory for standard chemical analyses. Results were computed with Index of geo-accumulation (I-geo) and Contaminant factor (Cf) models. All parameters varied significantly (P<0.05) at all sampling points. All values of parameters were highly above their respective control values. pH ranged between 5.89±0.13 and 5.48±0.08; Total Petroleum Hydrocarbon (TPH) concentrations from 3015.67±283.93 - 193.67±161.98 mg/kg; Cation Exchange Capacity (CEC) from 3.07±0.05 - 2.74±0.18 Cmol/kg; Cr from 21.66±0.31 - 4.71±0.34 mg/kg; Pb from 3.61±0.49 - 0.21±0.03 mg/kg; Cd from 2.41±0.09 - 0.00 mg/kg; Zn from 12.88±0.27 - 1.79±0.11 mg/kg and Cu from 8.36±0.06 - 3.14±0.13 mg/kg. I-geo for most parameters ranged from very highly polluted to unpolluted while Cf ranged from very high contamination to low contamination factor. Anthropogenic impact ranged from 99-56.16%. The study established that the remediation of the oil spill contaminated soil was not uniform at all sampling points and varied from location to location. Parameters like TPH were still above established standards even after remediation. Soil quality ultimately changed on impact by oil spill and remediation did not reestablish the original soil quality.