TY - JOUR

T1 - Effect of remediation strategies on biological activity of oil-contaminated soil - A field study

AU - Поляк, Юлия Марковна

AU - Бакина, Людмила Георгиевна

AU - Чугунова, Марина Валентиновна

AU - Маячкина, Наталья Владимировна

AU - Герасимов, Александр Олегович

AU - Буре, Владимир Мансурович

N1 - Funding Information: This study was supported by SRCES RAS state research topic No. 01201360065 . The authors thank Valentina Murygina, Moscow State University, for providing the preparation for bioaugmentation treatment.

PY - 2018/1

Y1 - 2018/1

N2 - The effects of oil contamination and different remediation strategies (natural attenuation, biostimulation, and bioaugmentation) on physico-chemical and biological parameters of podzolic soil were studied. The relationships between petroleum hydrocarbons, total organic carbon, nutrients, basal respiration and enzymatic activity (dehydrogenase, catalase and urease) were evaluated in soil over a 9-year period. The principal component analysis indicated that hydrocarbons were mainly responsible for changing metabolic activity for all treatments. Dehydrogenase activity was the most sensitive biological indicator with greater levels in unpolluted soil than those recorded in contaminated soil under all remediation strategies. The activity of urease was not directly correlated with oil degradation, while the relationships of catalase and respiration rate with petroleum hydrocarbons were dependent on method of remediation. Although both biostimulation and bioaugmentation had a positive influence on the biological activity of soil and its physicochemical properties, the considerable part of decontamination could be attributed to degradation activities of indigenous microorganisms. The addition of oil-degrading bacteria (bioaugmentation) enhanced biodegradation rates only temporarily indicating that biostimulation is a better remediation strategy for podzolic soil in the field.

AB - The effects of oil contamination and different remediation strategies (natural attenuation, biostimulation, and bioaugmentation) on physico-chemical and biological parameters of podzolic soil were studied. The relationships between petroleum hydrocarbons, total organic carbon, nutrients, basal respiration and enzymatic activity (dehydrogenase, catalase and urease) were evaluated in soil over a 9-year period. The principal component analysis indicated that hydrocarbons were mainly responsible for changing metabolic activity for all treatments. Dehydrogenase activity was the most sensitive biological indicator with greater levels in unpolluted soil than those recorded in contaminated soil under all remediation strategies. The activity of urease was not directly correlated with oil degradation, while the relationships of catalase and respiration rate with petroleum hydrocarbons were dependent on method of remediation. Although both biostimulation and bioaugmentation had a positive influence on the biological activity of soil and its physicochemical properties, the considerable part of decontamination could be attributed to degradation activities of indigenous microorganisms. The addition of oil-degrading bacteria (bioaugmentation) enhanced biodegradation rates only temporarily indicating that biostimulation is a better remediation strategy for podzolic soil in the field.

KW - Basal respiration

KW - Enzymatic activity

KW - Hydrocarbons

KW - Podzolic soil

KW - Pollution

UR - http://www.scopus.com/inward/record.url?scp=85031823517&partnerID=8YFLogxK

U2 - 10.1016/j.ibiod.2017.10.004

DO - 10.1016/j.ibiod.2017.10.004

M3 - Article

VL - 126

SP - 57

EP - 68

JO - International Biodeterioration and Biodegradation

JF - International Biodeterioration and Biodegradation

SN - 0964-8305

ER -