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DETERMINATION OF SUITABLE TPH REMEDIATION APPROACH VIA MANOVA AND INFERENTIAL STATISTICS ASSESSMENT
Okonofua, E.S., J.O. Babatola, O.O. Ojuri, and K.H. Lasisi.
Remediation 30(3):75-87(2020)

A pilot study was conducted that used phytoremediation, land farming, or chemico-biological stabilization to treat petroleum hydrocarbon-(TPH) and PAH-contaminated soil at a crude oil site in Nigeria. Nine cells (three for each treatment) and subcells (to serve as a control) covering an area of 1.53 m2 were prepared with ~300 kg of soil and. The prepared soil sample cells were delineated as low (spiked with 6.1 kg of crude oil), medium (spiked with 12.2 kg of crude oil), or high (spiked with 18.3 kg of crude oil) test plots. Each row contained a low, medium, and high concentration cell and was treated separately using one of the three treatment methods. The ratio of soil to organic amendment treatment was 2:1. Results showed >90% degradation in the initial concentration of TPH and PAHs across different contaminant levels except in the control subcells where only 30% of degradation was recorded. Land farming, chemico-biological stabilization, and phytoremediation ranked 1, 2, and 3, respectively.



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