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ABSTRACT
Over the past few decades, the public's attention has been drawn to the major environmental issue of soil that has been poisoned by petroleum hydrocarbons. The alternative of using biological processes to eliminate or render harmless these petroleum hydrocarbon pollutants is known as bioremediation. In this study, clean and petroleum hydrocarbon free soil was polluted with 10% petroleum hydrocarbon and treated with cassava mill effluent at varying time, the cassava mill effluent was used as a biostimulant to bioremediate the petroleum hydrocarbon polluted soil.
The pH and Exchangeable acidity were measured at the conclusion of the treatment, and the results revealed that the soil's pH increased when treated with the effluent compared to controls. The non-polluted but treated soil had pH value ranges of 6.6 – 7.5 whereas the polluted but treated soil samples had pH values ranging from 5.7 – 6.3. The experiment concludes that treatment with this effluent caused an increase in the soil pH value. Furthermore, exchangeable acidity values were between 0.15 - 0.30 m/g.
