PHYTOTOXIC RESPONSES OF Cenchrus bilforus Roxb AND Chrysopogon aciculatus [Retz.] Trin GROWN IN DIFFERENT LEVELS OF WASTE ENGINE OIL.
IFEDIORA, N. H., NWAFOR, P. C. AND USIM, B.
ABSTRACT
The potentials of grass species Cenchrus bilforus and Chrysopogon aciculatus to remediate waste engine oil polluted soil was investigated. Waste engine oil was added to four (4) kg soil samples at different concentrations on weight basis: 0% (control), 3%, 6% and 9% v/w oil-in-soil and allowed to stand for seven days before transplanting. They were three replicates. The plants were harvested after 8 weeks. The dried plants and the soil samples on which they were grown were analysed for four heavy metals, Chromium (Cr), Cadmium (Cd), Iron (Fe) and Arsenic (As). Results showed that there…