ABSTRACT
Concentrations of heavy metal and physicochemical changes of spent engine oil treated soil
and poultry manure after sida acuta growth was the aim of the study. 400 g poultry manure
and 3600 g of the soil was measured into a sack bag. Then, spent engine oil was added to at
different concentrations: control (0 mL), 1 % (40 mL), 3 % (120 mL) and 5 % (220 mL) v/w
oil-in-soil and permitted to stand for seven days in the sack bags before transplanting. The
soil after 12 weeks was collected and subjected to physical, chemical and heavy metal
analysis. The results gotten showed that the heavy metal content of the spent engine oil, clay
and sand of the treated soil, organic carbon, organic matter, exchangeable acidity, base
saturation, manganese, copper, chromium and cadmium of the treated soil sample was
significantly different (p<0.05) relative to the control soil sample. Also, the remediation
showed low heavy metal content of experimental soil, stilt of the treated soil sample, pH,
phosphorus, nitrogen, magnesium, potassium, electrical conductivity, calcium, zinc,
mercury and iron of the treated soil sample was significantly different (p<0.05) relative to
the control soil sample. There was no significant difference (p> 0.05) in sodium of the
treated soil sample relative to the control soil sample while the lead of the treated soil sample
was not detected relative to the control soil sample. Based on the results above, it could be
concluded that S. acuta had the latent for phytoremediation of spent engine oil polluted soil
and be considered for phytoremediation for such.
KEYWORDS:Saturation, Exchangeable Acidity, Iron, Manganese and Mercury
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