Influence of bioaugmentation and biostimulation on PAH degradation in aged contaminated soils: Response and dynamics of the bacterial community

Haleyur, Nagalakshmi; Shahsavari, Esmaeil; Jain, Shubhendra Kumar; Koshlaf, Eman; Ravindran, Vivek B.; Morrison, Paul D.; Osborn, A. Mark; Ball, Andrew S.

doi:10.1016/j.jenvman.2019.02.115

Cited by 94 publications

(32 citation statements)

References 75 publications

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“…The enhanced or complete PAH degradation can be achieved by mixed bacterial cultures and bacterial consortia as results of collaborative catabolic activities of participants and possibly presence of diverse degradation pathways. Therefore, most of the recent studies emphasized on mixed bacterial culture-and consortia-assisted PAH degradation (Vaidya et al, 2018;Haleyur et al, 2019;Patel et al, 2019). Degradation by immobilized bacteria and genetically modified bacteria is also a considerable approach (Peng X. et al, 2018).…”

Section: Bacteriamentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

et al. 2020

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Polycyclic aromatic hydrocarbons (PAHs) are widespread across the globe mainly due to long-term anthropogenic sources of pollution. The inherent properties of PAHs such as heterocyclic aromatic ring structures, hydrophobicity, and thermostability have made them recalcitrant and highly persistent in the environment. PAH pollutants have been determined to be highly toxic, mutagenic, carcinogenic, teratogenic, and immunotoxicogenic to various life forms. Therefore, this review discusses the primary sources of PAH emissions, exposure routes, and toxic effects on humans, in particular. This review briefly summarizes the physical and chemical PAH remediation approaches such as membrane filtration, soil washing, adsorption, electrokinetic, thermal, oxidation, and photocatalytic treatments. This review provides a detailed systematic compilation of the eco-friendly biological treatment solutions for remediation of PAHs such as microbial remediation approaches using bacteria, archaea, fungi, algae, and co-cultures. In situ and ex situ biological treatments such as land farming, biostimulation, bioaugmentation, phytoremediation, bioreactor, and vermiremediation approaches are discussed in detail, and a summary of the factors affecting and limiting PAH bioremediation is also discussed. An overview of emerging technologies employing multi-process combinatorial treatment approaches is given, and newer concepts on generation of value-added by-products during PAH remediation are highlighted in this review.

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Section: Bacteriamentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

et al. 2020

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“…The abundance and composition of PAHs degradation related genes can re ect the ability of PAHs degradation in soil (Haleyur et al 2019). The abundance of PAH-RHDα genes from Gram-positive and Gram-negative bacteria could indicate the potential of PAH degradation by soil microbial communities, mainly because the RHDα genes encode enzymes for the rst step of PAH degradation, which were often used as the main biomarker to re ect the PAHs degradation in soils (Ding et al 2010;Cébron et al 2008).…”

Section: The Change Of Pah-rhdα Genesmentioning

confidence: 99%

Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

Bao

Wang

Zhang

et al. 2021

Preprint

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Root exudates can stimulate microbial degradation in rhizosphere, but it remains unclear whether the rhizodegradation of polycyclic aromatic hydrocarbons (PAHs) occurs in corn straw-amended soil. Hence, in the present study, either citric acid, a common low molecular weight organic acid in the root exudates, or corn straw was added into aged PAHs-contaminated soil to investigate their effectiveness in the biodegradation of PAHs. The present study showed that either corn straw (Y) or combined application of corn straw and citric acid (YN100) significantly (P < 0.05) enhanced the degradation of total PAHs in soil after 28 days incubation, which increased by 8.43% and 18.62% compared with control (CK), respectively. High-throughput sequencing suggested that both Y and YN100 treatments led to a shift in bacterial community in soil and increased the abundance of PAHs degraders. Interestingly, the copies of PAHs ring-hydroxylating-dioxygenase (PAH-RHD) Gram-negative bacteria (GN) genes under YN100 treatment was significantly (P < 0.05) higher than those under Y treatment in the soil. Network analysis showed that the potential hosts of PAH-RHDα genes were Lysobacter, Rhizobium, Bacillus, Devosia, Ohtaekwangia, Ramlibacter, Massilia, Steroidobacter, Phenylobacterium and Microvirga. Bacillus, Lysobacter, Rhizobium and Ohtaekwangia and all ten genera obviously increased under Y and YN100 treatments. These results indicate that combined application of corn straw and citric acid increased the PAH-degrading bacteria and PAH-RHDα genes, thus improving the biodegradability of PAHs in the soil. As these results verified, a combined corn straw-rhizosphere approach should be a feasible remediation strategy for PAHs-contaminated soil.

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“…The results showed a complex microbial network leading to the discovery of microorganisms similar to those newly identified as Rugosibacter aromaticivorans and Immundisolibacter cernigliae involved in PAH degradation. Other strategies as bioaugmentation, based on the application of designed microbial consortia, are widely reported in contaminated soils (Zafra et al, 2016;Poi et al, 2018;Haleyur et al, 2019;Wolf et al, 2019) and seawater (Nikolopoulou et al, 2013;Pereira et al, 2019;Shi et al, 2020).…”

Section: Omics Approaches and Pah Bioremediationmentioning

confidence: 99%

Metagenomic Insights Into the Mechanisms for Biodegradation of Polycyclic Aromatic Hydrocarbons in the Oil Supply Chain

et al. 2020

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Petroleum is a very complex and diverse organic mixture. Its composition depends on reservoir location and in situ conditions and changes once crude oil is spilled into the environment, making the characteristics associated with every spill unique. Polycyclic aromatic hydrocarbons (PAHs) are common components of the crude oil and constitute a group of persistent organic pollutants. Due to their highly hydrophobic, and their low solubility tend to accumulate in soil and sediment. The process by which oil is sourced and made available for use is referred to as the oil supply chain and involves three parts: (1) upstream, (2) midstream and (3) downstream activities. As consequence from oil supply chain activities, crude oils are subjected to biodeterioration, acidification and souring, and oil spills are frequently reported affecting not only the environment, but also the economy and human resources. Different bioremediation techniques based on microbial metabolism, such as natural attenuation, bioaugmentation, biostimulation are promising approaches to minimize the environmental impact of oil spills. The rate and efficiency of this process depend on multiple factors, like pH, oxygen content, temperature, availability and concentration of the pollutants and diversity and structure of the microbial community present in the affected (contaminated) area. Emerging approaches, such as (meta-)taxonomics and (meta-)genomics bring new insights into the molecular mechanisms of PAH microbial degradation at both single species and community levels in oil reservoirs and groundwater/seawater spills. We have scrutinized the microbiological aspects of biodegradation of PAHs naturally occurring in oil upstream activities (exploration and production), and crude oil and/or by-products spills in midstream (transport and storage) and downstream (refining and distribution) activities. This work addresses PAH biodegradation in different stages of oil supply chain affecting diverse environments (groundwater, seawater, oil reservoir) focusing on genes and pathways as well as key players involved in this process. In depth understanding of the biodegradation process will provide/improve knowledge for optimizing and monitoring bioremediation in oil spills cases and/or to impair the degradation in reservoirs avoiding deterioration of crude oil quality.

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Influence of bioaugmentation and biostimulation on PAH degradation in aged contaminated soils: Response and dynamics of the bacterial community

Cited by 94 publications

References 75 publications

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

Metagenomic Insights Into the Mechanisms for Biodegradation of Polycyclic Aromatic Hydrocarbons in the Oil Supply Chain

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