Is it possible to increase bioavailability but not environmental risk of PAHs in bioremediation?

Ortega‐Calvo, José‐Julio; Tejeda-Agredano, M.C.; Jímenez-Sánchez, Celía; Congiu, Eleonora; Sungthong, Rungroch; Niqui‐Arroyo, José‐Luis; Cantos, Manuel

doi:10.1016/j.jhazmat.2013.03.042

Cited by 125 publications

(51 citation statements)

References 132 publications

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“…A percolação da água por entre os vazios do solo afeta as reações de superfície das partículas, bem como as forças de atração existente entre a água ou fluidos já existentes na matriz do solo, fazendo com que ocorra uma drenagem ou lixiviação dos compostos em fase livre em sua estrutura (HYUN et al, 2008, ORTEGA-CALVO et al, 2013. Os efeitos observados na Figura 2 são associados ao efeito de lixiviação gerado pela percolação de água por entre os vazios do solo, fazendo com que o contaminante presente em fase livre seja carreado para fora da estrutura do solo.…”

Section: Análise Estatística Dos Resultadosunclassified

“…Também é possuidor de uma alta taxa de biodegradabilidade e, além disso, conta basicamente com a ausência de enxofre e compostos aromáticos em sua composição (PASSMAN;DOBRAIC, 2005;MENEGHETTI, 2007;REGINATTO et al, 2013, SILVA et al, 2012 -a adição ou não de macronutrientes (Nitrogênio, Fósforo e Potássio). Quando adicionados, foi obedecida a relação de 100:10:10:1 (C:N:P:K); o teor de carbono presente no experimento foi considerado inteiramente como o proveniente na estrutura química do biodiesel, uma vez que o teor de carbono existente no solo foi determinado como inferior a 0,8%, sendo o valor real insignificante e não passível de ser mensurado com a metodologia utilizada.…”

Section: Contaminanteunclassified

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Bioestimulação aumenta a propagação de contaminantes oleosos em solos

Cecchin

Reginatto

Colla

et al. 2014

Cieng

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RESUMOEste trabalho avaliou os processos de interação em uma simulação de derramamento de biodiesel em um solo argiloso sob diferentes configurações estruturais, visando observar os efeitos de sorção deste presente a aplicação de uma bioestimulação de NPK e diferentes precipitações. Foram moldados corpos de prova de 400 g de solo seco, em diferentes índices de vazios, diferentes umidades, sendo realizado um bloco de experimentos com e sem a presença de nutrientes e simulando diferentes precipitações. Os corpos de prova foram submetidos a uma simulação de derramamento de biodiesel e deixados sob a percolação por 15 dias. Após esse período, os corpos de prova foram submetidos a três valores de simulação de precipitação, deixados em repouso por 15 dias. As análises quantitativas foram realizadas por meio do método de ultrassom determinando o teor residual do contaminante. Quando os corpos de prova foram submetidos a simulação de precipitação percebeu-se uma maior lixiviação do contaminante nas amostras com adição de nutrientes, indicando que os efeitos de saturação dos campos reativos dos argilominerais puderam ser observados. Concluiu-se que a aplicação de bioestimulação proporciona uma maior lixiviação do biodiesel potencializando os efeitos nocivos da contaminação. Palavras-chave: Contaminação, bioestimulação, sorção. ABSTRACTThis study aimed to evaluate the processes of interaction in a biodiesel spill simulation in a clay soil under different structural configurations in order to observe the effects of sorption present applying a biostimulation of NPK and different rainfall simulation. It was molded samples of 400 g of dry soil at different void ratios, different moisture contents, in a block of experiments being carried out with and without the presence of nutrients and simulating different rainfall under the samples. They were subjected to a simulated spill biodiesel being left in the percolation for 15 days. After this period, the samples were subjected to three simulation values of precipitation, allowed to stand for 15 days. Quantitative analyzes were performed using the ultrasound method determining the residual amount of the contaminant. When the samples were subjected to simulated rainfall it was perceived a greater leaching of the contaminant in the samples with added nutrients, indicating that the effects of saturation of the reactive fields of clay minerals can be observed. It was concluded that the application of biostimulation provides greater leaching of biodiesel increasing the damaging effects of pollution.

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Section: Análise Estatística Dos Resultadosunclassified

Section: Contaminanteunclassified

Bioestimulação aumenta a propagação de contaminantes oleosos em solos

Cecchin

Reginatto

Colla

et al. 2014

Cieng

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“…The genotoxicological investigations confirmed the mutagenic properties on bacteria. The compounds are ordered as follow [45][46][47][48]:…”

Section: Influence Of Other Organic Micropollutants On Tested Organismsmentioning

confidence: 99%

Influence of Selected Organic Micropollutants on Organisms

Włodarczyk‐Makuła

2017

Civil and Environmental Engineering Reports

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This article describes the toxicity of organic micropollutants on tested microorganisms. Itis a current issue because organic micropollutants are identified in all elements of environmental (surface water, ground water, soils) and in food products. The organic micropollutants include: polychlorinated dibenzodioxyns PCDD, polychlorinated dibenzofurans PCDF, polychlorinated biphenyls PCB, polycyclic aromatic hydrocarbons PAH, halogenated compounds and by-products of water treatment. Some organic compounds cause hazard for health and human life due to their estrogenic biological activity, carcinogenic, mutagenic or teratogenic activity. The influence on organisms indicators of these compounds based on literature data were presented. The level of TEQ (toxic equivalency) in response to organic chlorine derivatives (PCDDs, PCDF, PCBs) is usually determined by toxic equivalency factor (TEF). The International Agency for Research on Cancer classifies organic micropollutants as carcinogenic to humans (Group 1), possibly carcinogenic (Group 2A) or probably carcinogenic to humans (Group 2B).

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“…To decontaminate polluted soil, plant rhizosphere has recently gained attention with regard to the remediation of organic pollutants such as PAHs and HMs. High levels of microbes associated with the root zone, the presence of some extracellular biotransformation enzymes including peroxidises, reductases, Cytochome P540, Laccases, Glutathione-S-transferease, are all positive factors that promote the bioavailability of these PAHs and their degradation (Ortega-Calvoa et al 2013). It has also been experimentally proved that due to the influence of certain plant root exudates, biosurfactants are produced by certain rhizobacteria which facilitate the solubilization of oil pollutants from the soil.…”

Section: Plant-microbes Association-assisted Removal Of Pahs and Heavmentioning

confidence: 99%

Plant-Microbe Association-Assisted Removal of Heavy Metals and Degradation of Polycyclic Aromatic Hydrocarbons

Sarma¹,

Prasad

2015

Springer Geology

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Contamination by polycyclic aromatic hydrocarbons and heavy metals is a rather serious problem across the world and poses a major threat to living organisms. These are considered to be carcinogens and are constituents of oil sludge. The magnitude of PAHs released into the environment has increased drastically in recent times. This is mostly due to petroleum waste or seepage during transportation of crude oil. There have been several instances of oil spills on the coasts of India and elsewhere. In northeast India, PAHs pollution is evident at the sites of drilling and refinery sites. The boiling points of high molecular weight PAHs are very high and they are almost difficult to decompose. Their hydrophobicity causes these compounds to accumulate and sequester in soil organic matter; thus, their desorption from soil limits the efficiency of biodegradation in situ. This chapter will focus on the various case studies where plant-microbe association has been used to assist bioremediation process of PAHs and heavy metals in oilcontaminated soil. Topics to be covered include how plants and microbes together effect the remediation process, bioavailability of PAHs, facilitating the movement of essential nutrients, air and water and production of biosurfactants in faster acceleration of the removal process.

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Is it possible to increase bioavailability but not environmental risk of PAHs in bioremediation?

Cited by 125 publications

References 132 publications

Bioestimulação aumenta a propagação de contaminantes oleosos em solos

Bioestimulação aumenta a propagação de contaminantes oleosos em solos

Influence of Selected Organic Micropollutants on Organisms

Plant-Microbe Association-Assisted Removal of Heavy Metals and Degradation of Polycyclic Aromatic Hydrocarbons

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