Targeting the right parameters in PAH remediation studies

Davin, Marie; Colinet, Gilles; Fauconnier, Marie‐Laure

doi:10.1016/j.envpol.2021.116857

Cited by 6 publications

(3 citation statements)

References 66 publications

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“…However, recent data indicate that the detection and degradation of exclusively 16 apolar PAHs out of the hundreds other known is currently insufficient for prevention of the human health risk. The classical PAH watch list established in 1976 by the US-EPA does not comprise apolar PAHs containing such heteroatoms as oxygen, nitrogen, and sulfur and polar ones substituted with halogens, alkyl-, oxy-, hydroxyl-, amino-, or nitro-functional groups although many of them are believed to be more genotoxic, mutagenic, and carcinogenic [37]. The higher bioaccumulation of alkyl PAHs in comparison to their apolar homologs was demonstrated in the roots of Echinacea purpurea [38], which is proof that they should be taken into consideration for bioremediation in the future.…”

Section: Removal Of Hydrocarbonsmentioning

confidence: 99%

Selection of Endophytic Strains for Enhanced Bacteria-Assisted Phytoremediation of Organic Pollutants Posing a Public Health Hazard

Karaś¹,

Wdowiak-Wróbel²,

Sokołowski³

2021

IJMS

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Anthropogenic activities generate a high quantity of organic pollutants, which have an impact on human health and cause adverse environmental effects. Monitoring of many hazardous contaminations is subject to legal regulations, but some substances such as therapeutic agents, personal care products, hormones, and derivatives of common organic compounds are currently not included in these regulations. Classical methods of removal of organic pollutants involve economically challenging processes. In this regard, remediation with biological agents can be an alternative. For in situ decontamination, the plant-based approach called phytoremediation can be used. However, the main disadvantages of this method are the limited accumulation capacity of plants, sensitivity to the action of high concentrations of hazardous pollutants, and no possibility of using pollutants for growth. To overcome these drawbacks and additionally increase the efficiency of the process, an integrated technology of bacteria-assisted phytoremediation is being used recently. For the system to work, it is necessary to properly select partners, especially endophytes for specific plants, based on the knowledge of their metabolic abilities and plant colonization capacity. The best approach that allows broad recognition of all relationships occurring in a complex community of endophytic bacteria and its variability under the influence of various factors can be obtained using culture-independent techniques. However, for practical application, culture-based techniques have priority.

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Section: Removal Of Hydrocarbonsmentioning

confidence: 99%

Selection of Endophytic Strains for Enhanced Bacteria-Assisted Phytoremediation of Organic Pollutants Posing a Public Health Hazard

Karaś¹,

Wdowiak-Wróbel²,

Sokołowski³

2021

IJMS

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“…Polycyclic Aromatic Hydrocarbons (PAH) are ubiquitous in the environment with well documented negative effects on living organisms, showing toxic, mutagenic, and carcinogenic properties, both in aquatic and in terrestrial ecosystems (Nzila 2018;Davin et al 2021). Since biological degradation of these pollutants is regarded as the principal mechanism of detoxification and removal, bioremediation is an efficient and safe technology for the restoration of polluted ecosystems (Martínez-Ávila et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Metaproteomic and gene expression analysis of interspecies interactions in a PAH-degrading synthetic microbial consortium constructed with the key microbes of a natural consortium

et al. 2023

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Polycyclic AromaticHydrocarbons (PAHs) impose adverse effects on the environment and human life. The use of synthetic microbial consortia is promising in bioremediation of contaminated sites with these pollutants. However, the design of consortia taking advantage of natural interactions has been poorly explored. In this study, a dual synthetic bacterial consortium (DSC_AB) was constructed with two key members (Sphingobium sp. AM and Burkholderia sp. Bk), of a natural PAH degrading consortium. DSC_AB showed significantly enhanced degradation of PAHs and toxic intermediary metabolites relative to the axenic cultures, indicating the existence of synergistic relationships. Metaproteomic and gene-expression analyses were applied to obtain a view of bacterial performance during phenanthrene removal. Overexpression of the Bk genes, naph, biph, tol and sal and the AM gene, ahdB, in DSC_AB relative to axenic cultures, demonstrated that both strains are actively participating in degradation, which gave evidence of cross-feeding. Several proteins related to stress response were under-expressed in DSC_AB relative to axenic cultures, indicating that the division of labour reduces cellular stress, increasing the efficiency of degradation. This is the one of the first works revealing bacterial relationships during PAH removal in a synthetic consortium applying an omics approach. Our findings could be used to develop criteria for evaluating the potential effectiveness of synthetic bacterial consortia in bioremediation.

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“…Polycyclic aromatic hydrocarbons (PAHs) are a group of hazardous contaminants that have been targeted as priority pollutants by regulatory agencies worldwide because these contaminants are carcinogenic, teratogenic, and mutagenic. − Generally, PAH emissions are incomplete combustion products of fossil fuel and improper industrial discharges, which may threaten human health even at low contaminations. − PAH contamination is widespread, with 1.5% of Chinese soil affected, according to the national soil contamination survey . Notably, benzo[ a ]pyrene (BaP) is the most toxic and highly carcinogenic PAH; it is ubiquitous in the environment and has attracted worldwide concern .…”

Section: Introductionmentioning

confidence: 99%

Risk Control Values and Remediation Goals for Benzo[a]pyrene in Contaminated Sites: Sectoral Characteristics, Temporal Trends, and Empirical Implications

Luo

Yang

et al. 2023

Environ. Sci. Technol.

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Benzo[a]pyrene (BaP) is a highly carcinogenic pollutant of global concern. There is a need for a comprehensive assessment of regulation decisions for BaP-contaminated site management. Herein, we present a quantitative evaluation of remediation decisions from 206 contaminated sites throughout China between 2011 and 2021 using the cumulative distribution function (CDF) and related statistical methodologies. Generally, remediation decisions seek to establish remediation goals (RGs) based on the risk control values (RCVs). Cumulative frequency distributions, followed non-normal S-curve, emerged multiple nonrandom clusters. These clusters are consistent with regulatory guidance values (RGVs), of national and local soil levels in China. Additionally, priority interventions for contaminated sites were determined by prioritizing RCVs and identifying differences across industrial sectors. Notably, we found that RCVs and RGs became more relaxed over time, effectively reducing conservation and unsustainable social and economic impacts. The joint probability curve was applied to model decision values, which afforded a generic empirically important RG of 0.57 mg/kg. Overall, these findings will help decision-makers and governments develop appropriate remediation strategies for BaP as a ubiquitous priority pollutant.

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Targeting the right parameters in PAH remediation studies

Abstract: Highlights  Research should expand the list of PACs studied in soil remediation.  Aged-and co-contaminated material should receive more attention in remediation trials.  Bioavailability measurement should be included in remediation trials.

Cited by 6 publications

References 66 publications

Selection of Endophytic Strains for Enhanced Bacteria-Assisted Phytoremediation of Organic Pollutants Posing a Public Health Hazard

Selection of Endophytic Strains for Enhanced Bacteria-Assisted Phytoremediation of Organic Pollutants Posing a Public Health Hazard

Metaproteomic and gene expression analysis of interspecies interactions in a PAH-degrading synthetic microbial consortium constructed with the key microbes of a natural consortium

Risk Control Values and Remediation Goals for Benzo[a]pyrene in Contaminated Sites: Sectoral Characteristics, Temporal Trends, and Empirical Implications

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