Abstract
ABSTRACT The present study investigated the role of soil pH adjustments in heavy metalsconcentrations in waste engine oil (W EO) - polluted soils. Sun-dried top soil (0-10cm) wasmeasured into buckets. WEO was added to soil and mixed thoroughly to obtain similarconcentrations of 2.5% w/w oil in soil. The polluted soil was thereafter amended with NPK(15:15:15) fertilizer to enhance microbial activity. The buckets were transferred into a wellventilated screen house with inherent constant room temperature (27oC). The entire setupwas divided into 5 sets. Each set was wetted daily with 200ml of different pH solutions (pH3, 5, 7, 9, and 11) for a period of 3 months. There were significant reductions in heavymetal concentrations particularly at pH of 5. There were significant reductions in totalhydrocarbons contents (THC) of polluted soils at 2 months after pollution from 1882.32mg/kg at pH 3 to 325 mg/kg at pH 5, compared to THC of soil at 1 week after pollution atpH 7 (3425.63mg/kg).Keywords: Contamination factor; environmental risk factor; hazard quotient; naturalattenuation; pH; soil; waste engine oil.Research Article
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
