The Effect of Bioremediated Diesel Polluted Soil. (original) (raw)

The aim of this research is to investigate the effects of bioremediated soil using Echhoniacrassipes(water hyacinth) on the germination parameters such as days to germination of Amarathushybridus(green amaranth) and the physico-chemical profile such as total petroleum hydrocarbon (TPH) of the bioremediated soil with water hyacinth. 1kg of soil was polluted with 700ml of diesel oil in perforated plastic containers size (64x21cm) and amended with E.crassipes (water hyacinth) at 50,100 and 150g concentrations for 90 days. About 5 seeds of A.hybriduswere sown on the bioremediated soil for 50 days. Positive (1kg of unpolluted soil) and negative (1kg of 700ml diesel oil polluted soil) controls were used.It was observed thatA. hybridus seeds in the positive control had the quickest day to germination (7 days). An average of 12, 11, and 9 days to germination was observed in soil treated with E.crassipes at 50, 100 and 150 concentrations respectively. For the negative control, day to germination was late (20days). A significant difference was obtained in the root length and plant height and percentage germination between the positive and negativecontrol. However, there was no significant difference between the positive control and the soil treated with E. crassipes at the three concentrations. The study had shown that diesel contamination affected germination and growth of A. hybridusplant adversely. However, E.crassipescan be effectively used to reduce the adverse effect of diesel polluted soil on A.hybridusand therefore serve as bioremeditor of diesel oil polluted soil.