Microbiological resilience of soils contaminated with crude oil

Franco, Irene De; Contin, Marco; Bragato, G.; Nobili, Maria De

doi:10.1016/j.geoderma.2003.10.002

Cited by 57 publications

(43 citation statements)

References 33 publications

(35 reference statements)

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“…The efficiencies of biodegradation of different contaminants with different components were inconsistent during the biodegradation process of complex oil components caused by the different bioavailabilities, eventually leading to different removal efficiencies of different components of oil contaminants [18].…”

Section: Removal Efficiency Analysis Of Crude Oil Componentsmentioning

confidence: 99%

Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

Jia¹,

Zhao²,

Hu³

et al. 2016

Pol. J. Environ. Stud.

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Section: Removal Efficiency Analysis Of Crude Oil Componentsmentioning

confidence: 99%

Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

Jia¹,

Zhao²,

Hu³

et al. 2016

Pol. J. Environ. Stud.

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“…Soil pollution by heavy metals causes increased specific respiration of the soil microbial biomass and depressed biosynthesis (Chander and Brookes, 1991). In a study on microbiological resilience of soils contaminated with crude oil, Franco et al (2004) observed that evaluation of soil resilience by crude oil degradation rates was difficult as less than 2% of crude oil was mineralized to CO 2 . However, crude oil contamination resulted in large and significant variations in soil microbial biomass.…”

Section: Soil Resistance and Resiliencementioning

confidence: 99%

The complexity of soil biological sustainability

Nobili¹,

Brookes²,

Sánchez-Monedero³

et al. 2016

Acta Hortic.

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Additions of organic amendments to soil not only compensate for decreased soil C, but also contribute to energy requirements for conserving biological activity levels. The soil microbial biomass displays some highly conserved, and possibly unique, characteristics that do not permit a classic interpretation of microbial metabolic parameter data. The resilience of soil microbial biomass and the role of soil organic matter in sustaining microbial biomass under practically zero C inputs were assessed in two long term incubation experiments using soils from the Broadbalk experiment at Rothamsted (UK). Soils with low organic C contents, showed the greatest decline in biomass C during the first 30 d of incubation. The ATP concentration of this rapidly declining microbial biomass did not change during the prolonged incubation period, confirming this peculiar character of the soil microbial biomass. Specific respiration rate did not depend upon substrate availability, being higher in soils that had received the lowest C inputs. Qualitative and quantitative changes observed in humic fractions suggest that humified soil organic matter is a much more dynamic soil fraction than is normally considered and provides a utilizable energy reserve for soil microorganisms. Carbon levels can be successfully restored in soils through practices such as incorporation of crop residues, re-vegetation and application of manures, biosolids and composts. Some amendments, such as olive mill waste compost, promote incorporation of altered lignin structures, N-containing compounds and carbohydrates into humic acids. The mineral-bound fraction of humic C also increases, after their addition, and contributes to the accumulation of the most inert soil C pools.

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“…O quociente metabólico (qCO 2 ) médio foi de 6,38 µg C-CO 2 µg BM-C h -1 , acima do constatado por Franco (2004) que, avaliando o impacto da contaminação por óleo cru em diferentes tipos de solo, notaram variações de 1,24 a 4,78 µg C-CO 2 µg BM-C h -1 ; já Marin et al (2004), encontraram valores mais elevados de qCO 2 em área contaminada com hidrocarbonetos e tratada com "landfarming" ao longo de 11 meses de avaliação, quando foram verificados valores oscilando de 6,6 a 11,9 µg C-CO 2 µg BM-C h -1 . O valor de qCO 2 aqui relatado, encontra-se elevado, indicando que a comunidade microbiana heterotrófica do solo de "landfarming" está sob algum tipo de estresse fisiológico, consumindo muito carbono para se manter.…”

Section: Biomassa Microbiana E Atividade Bioquímica Do Solounclassified

“…O espalhamento do material oleoso contaminante sobre o solo e a incorporação na camada arável, também denominada camada reativa (US EPA, 2000), pode afetar diretamente e de modo diferenciado, os microrganismos responsáveis pela biodegradação (Franco, 2004). A biodegradação microbiana, que é o mecanismo primário de eliminação dos poluentes orgânicos do ambiente, compõe a base deste tratamento, sendo de grande importância a manutenção de uma comunidade microbiana heterotrófica ativa, mas são escassos os estudos relacionados à atividade dos microrganismos em área de tratamento de resíduo petroquímico por "landfarming".…”

Section: Introductionunclassified

Biomassa, atividade microbiana e fungos micorrízicos em solo de "landfarming" de resíduos petroquímicos

Paula

Soares²,

Siqueira³

2006

Rev. bras. eng. agríc. ambient.

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RESUMOAvaliaram-se, no presente trabalho, a biomassa microbiana, atividade heterotrófica e a ocorrência de fungos micorrízi-cos arbusculares (FMAs) de um solo de área de "landfarming" de resíduo petroquímico durante 15 anos. Realizaram-se análises laboratoriais e ensaios em casa de vegetação para avaliar as condições biológicas do solo e o efeito da inoculação com FMAs (Glomus clarum e Paraglomus occultum) no crescimento de seis espécies vegetais com potencial para estabelecimento nesses solos. A biomassa microbiana e os indicadores de atividade bioquímica (respiração basal, respiração induzida por substrato e qCO 2 ) apresentaram-se em valores típicos de solos não contaminados, exceto para o qCO 2 , que foram bem elevados. Esses resultados indicam a presença de comunidades microbianas ativas mas se verificou baixa atividade das enzimas β-glicosidase, fosfatase ácida e urease, indicando interferências nos processos bioquímicos do solo o que poderá comprometer sua capacidade de transformar os resíduos. Verificou-se também a ocorrência abundante de FMAs em plantas espontâneas ou introduzidas. Foi notória a resposta positiva da inoculação com FMAs sobre o crescimento da alfafa, braquiária e sorgo, porém sem influência no crescimento do capim-elefante. Esses resultados apontam a existência de populações microbianas tolerantes aos componentes tóxicos dos resíduos petroquímicos aplicados continuamente ao solo estudado. Palavras-chave: biorremediação, enzimas, heterotróficos, micorrizasBiomass, microbial activity and mycorrhizal fungi in landfarming soil of petrochemical wastes ABSTRACTIn the present study the microbial biomass, heterotrophic activity and the occurrence of arbuscular mycorrhizal fungi (AMF) were evaluated in soil samples from a landfarming area that has been used for petrochemical waste treatment for the last fifteen years. Laboratory analysis and greenhouse assays were conducted in order to evaluate soil biological conditions and the effects of inoculation with AMF (Glomus clarum and Paraglomus occultum) on growth of six plant species with potential to establish in soil affected by oil pollutants. Values for soil microbial biomass and biochemical indicators (basal and induced soil respiration) were in the typical range found in non-contaminated soils, but the values for qCO 2 were in the high range. In spite of the indication of microbial stress, the results suggest the presence of metabolically active microbial communities in the soil. However, the relatively low activities of β-glucosidase, acid phosphatase and urease, indicate interferences on biochemical processes that may affect the degradation of residues transformation by the soil community. Abundant occurrence of AMF in either spontaneous or introduced plants was also observed. Inoculation with AMF had significant effects on alfafa, brachiaria grass and sorghum, but no effects on elephant grass. The results of the present study indicate the existence of microbial populations tolerant to the toxic components of petrochemical wastes that were co...

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Microbiological resilience of soils contaminated with crude oil

Cited by 57 publications

References 33 publications

Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

The complexity of soil biological sustainability

Biomassa, atividade microbiana e fungos micorrízicos em solo de "landfarming" de resíduos petroquímicos

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