Concentration of Polycyclic Aromatic Hydrocarbon (PAH) in roots and leaves of Polyscias fruticosa used in phytoextraction of crude oil spiked soil
Keywords:
Polyscias fruticosa, Crude oil, Spiked soil, Phytoextraction, Gas ChromatographyAbstract
Soil spiked with crude oil was successfully investigated by phytoextraction. The study was carried out to assess the potential of Polyscias fruticosa in the uptake and translocation of polycyclic aromatic hydrocarbons (PAHs) in phytoextraction of soil spiked with crude oil. The same treatment of soil with crude oil was carried out, while the plant harvesting period was varied. Hundreds of healthy cuttings of P. fruticosa were allowed to propagate, then after 17 days, plants were transplanted in poly bags containing 500 grams of spiked soil. A set of unexposed plants were established on each harvesting period. The duration of the study was fixed for 10 months. Plant biomass of the treated and control plants were determined at the beginning and the end of the experiment. Hydrocarbons were extracted and analysed by GCMS. The results indicated that the plant absorbed and translocated a significant concentration of PAHs. High absorption occurred on phenanthrene (194.20 mg/kg) and anthracene (208.99
mg/kg) in the root on 10 months harvesting period. Percentage removal indicates a significant reduction of PAHs from exposed soil. However, the Bioconcentration Factor (BCF) and Translocation Factor (TF) values obtained on the harvesting periods were less than 1, which indicate low absorption and translocation capacity of the plant. The study showed that P. Fruticosa can be used for the extraction and translocation of PAHs from crude oil spiked soil.