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Bioremediation of Diesel-Contaminated Soils by Natural Attenuation, Biostimulation and Bioaugmentation Employing Rhodococcus sp. EH831

조경숙|강연실|이은희
한국미생물·생명공학회 (The Korean Society For Microbiology And Biotechnology)|2011.03|한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)|제39권 제1호|pp. 86-92

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키워드

soil contaminationRhodococcus sp.Natural attenuationbiostimulationbioaugmentation
주제분류생물학

초록

Three bioremediation methods, natural attenuation (NA), biostimulation (BS) and bioaugmentation (BA) were applied to remediate diesel-contaminated soil, with their remediation efficiencies and soil microbial activities compared both with and without surfactant (Tween 80). BA treatment employing Rhodococcus sp. EH831was the most effective for the remediation of diesel-contaminated soil at initial remediation stage. On the addition of surfactant, no significant effect on the remediation performance was observed. A negative correlation was found between the dehydrogenase activity (DHA) and residual concentration of total petroleum hydrocarbons (TPHs) at below 20,000 mg-TPHs ·kg-dry soil^-1, as follows: DHA (μg-TPF(Triphenylformazan) ·g-dry soil^-1 (d^-1) = -0.02 × TPHs concentration (mg-TPHs ·kg-dry soil^(-1) + 425.76 (2500 ≤ TPHs concentration ≤ 20000, p < 0.01).

Abstract

Three bioremediation methods, natural attenuation (NA), biostimulation (BS) and bioaugmentation (BA) were applied to remediate diesel-contaminated soil, with their remediation efficiencies and soil microbial activities compared both with and without surfactant (Tween 80). BA treatment employing Rhodococcus sp. EH831was the most effective for the remediation of diesel-contaminated soil at initial remediation stage. On the addition of surfactant, no significant effect on the remediation performance was observed. A negative correlation was found between the dehydrogenase activity (DHA) and residual concentration of total petroleum hydrocarbons (TPHs) at below 20,000 mg-TPHs ·kg-dry soil^-1, as follows: DHA (μg-TPF(Triphenylformazan) ·g-dry soil^-1 (d^-1) = -0.02 × TPHs concentration (mg-TPHs ·kg-dry soil^(-1) + 425.76 (2500 ≤ TPHs concentration ≤ 20000, p < 0.01).

참고문헌 (34)

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