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2015 ; 4
(ä): 540
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Bioremediation of heavy metals and petroleum hydrocarbons in diesel contaminated
soil with the earthworm: Eudrilus eugeniae
#MMPMID26413446
Ekperusi OA
; Aigbodion IF
Springerplus
2015[]; 4
(ä): 540
PMID26413446
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A laboratory study on the bioremediation of diesel contaminated soil with the
earthworm Eudrilus eugeniae (Kingberg) was conducted. 5 ml of diesel was
contaminated into soils in replicates and inoculated with E. eugeniae for
90 days. Physicochemical parameters, heavy metals and total petroleum
hydrocarbons were analyzed using AAS. BTEX in contaminated soil and tissues of
earthworms were determined with GC-FID. The activities of earthworms resulted in
a decrease in pH (3.0 %), electrical conductivity (60.66 %), total nitrogen
(47.37 %), chloride (60.66 %), total organic carbon (49.22 %), sulphate
(60.59 %), nitrate (60.65 %), phosphate (60.80 %), sodium (60.65 %), potassium
(60.67 %), calcium (60.67 %), magnesium (60.68 %), zinc (60.59 %), manganese
(60.72 %), copper (60.68 %), nickel (60.58 %), cadmium (60.44 %), vanadium
(61.19 %), chromium (53.60 %), lead (60.38 %), mercury (61.11 %), arsenic
(80.85 %), TPH (84.99 %). Among the BTEX constituents, only benzene (8.35 %) was
detected in soil at the end of the study. Earthworm tissue analysis showed
varying levels of TPH (57.35 %), benzene (38.91 %), toluene (27.76 %),
ethylbenzene (42.16 %) and xylene (09.62 %) in E. eugeniae at the end of the
study. The study has shown that E. eugeniae could be applied as a possible
bioremediator in diesel polluted soil.