Extracellular polymeric substances govern the development of biofilm and mass transfer of polycyclic aromatic hydrocarbons for improved biodegradation

Zhang, Yinping; Wang, Fang; Zhu, Xiaoshu; Zeng, Jun; Zhao, Qian; Jiang, Xin

doi:10.1016/j.biortech.2015.06.110

Cited by 120 publications

(37 citation statements)

References 34 publications

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“…Interestingly, according to Isaac et al [31], Pseudomonas monteilii P26 had not been able to remove pyrene at all when using planktonic cells after 21 days 13 of incubation. The results obtained in this work shows the advantages of using biofilms over free cells for PAH removal as it was already reported by Zhang et al [29].…”

Section: Discussionsupporting

confidence: 87%

“…It is well known that PAH produce hydrophobic damage and, in response, the bacterial cells protect themselves by producing EPS thus forming biofilm [29]. It seems that during the 7 day incubation in the PAH removal assay, the originally non stimulated biofilms reached a similar bacterial number as the previously ACG-stimulated biofilms due to the stress exerted by PAH (increased biofilm thickness was clearly visible after the assay).…”

Section: Discussionmentioning

confidence: 89%

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Polycyclic aromatic hydrocarbons removal by immobilized bacterial cells using annonaceous acetogenins for biofilm formation stimulation on polyurethane foam

Alessandrello

Parellada

Tomás

et al. 2017

Journal of Environmental Chemical Engineering

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 89%

Polycyclic aromatic hydrocarbons removal by immobilized bacterial cells using annonaceous acetogenins for biofilm formation stimulation on polyurethane foam

Alessandrello

Parellada

Tomás

et al. 2017

Journal of Environmental Chemical Engineering

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“…Zhang and colleagues observed that within the biofilm phenanthrene and pyrene had been almost completely biodegraded after 3-5 days [60]. This is in agreement with the model presented here.…”

Section: Biodegradation Modelsupporting

confidence: 91%

Memory Effect of Aquatic Biofilms in the Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) and Polychlorinated Biphenyls (PCBs) in Water Streams

Bertini¹

2016

IJESD

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Abstract-Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) are ubiquitous pollutants in the environment. Due to their physical-chemical properties, PAHs and PCBs can be accumulated in organic matrices such as living organisms, soil and sludge. Their toxicity and mutagenicity is a serious concern. In many cases an effective strategy to assess the pollution of water streams is to detect these compounds using biofilms, sediment and sludge as passive samplers.However, the absorption of hydrophobic compounds in biofilms is a reversible mechanism. The molecules of a specific pollutant can be desorbed back into the water column when specific conditions have changed. Furthermore, those molecules could be biodegraded by the microorganisms living inside that biofilm.Thus, the pollutant is not going to remain detectable inside that biofilm sample permanently, but only for a limited time. This is due to the memory effect.The aim of this work is to retrieve the most relevant data on this subject and build from scratch a simplified model. This will help to understand how microbial biofilms can influence the distribution of PAHs and PCBs in water streams.Absorption, desorption and biodegradation are the three main mechanisms considered for the calculations. This information will surely stimulate further research on this topic. Phenanthrene and pyrene were chosen as reference compounds for PAHs and Kaneclor 300, Aroclor 1260 and other tri-and tetra-chlorinated byphenils were chosen as reference for PCBs.

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“…Biofilm development is a complex physiological process guided by a series of physical, chemical, and biological factors, and the importance of EPS are well established for biofilm formation (Flemming et al, 2016;Dragos and Kovacs, 2017;Koo et al, 2017). Although EPS provide structural support to maintain the biofilm stability of V. parahaemolyticus, their respective functional role is still unclear (Han et al, 2017;Tan et al, 2018 The production of high amount of EPS and the formation of densely distributed architectures were the predominant characteristics of the mature biofilms (Gupta et al, 2015;Zhang et al, 2015). After 24 h incubation, the biofilms with 3D structures and multilayers formed ( Figure 1B).…”

Section: Discussionmentioning

confidence: 99%

Insights Into the Role of Extracellular DNA and Extracellular Proteins in Biofilm Formation of Vibrio parahaemolyticus

Wang

Qian

et al. 2020

Front. Microbiol.

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The extracellular polymeric substances (EPS) construct the three-dimensional (3-D) structure of biofilms, but their respective roles are still not clear. Therefore, this study aimed to illuminate the role of key chemical components [extracellular DNA (eDNA), extracellular proteins, and carbohydrates] of EPS in biofilm formation of Vibrio parahaemolyticus. The correlations between each key chemical component and biofilm formation were first determined, showing that the biofilm formation of V. parahaemolyticus was strongly positively correlated with both eDNA and protein content (P < 0.01), but not with carbohydrates. Subsequently, individual DNase I or protease K treatment markedly reduced the initial adhesion and structural stability of the formed biofilms by hydrolyzing the eDNA or extracellular proteins, but did not induce significant dispersion of mature biofilms. However, the combination of DNase I and protease K treatment induced the obvious dispersion of the mature biofilms through the concurrent destruction of eDNA and extracellular proteins. The analysis at a structural level showed that the collapse of biofilms was mainly attributed to the great damage of the loop configuration of eDNA and the secondary structure of proteins caused by the enzyme treatment. Therefore, this study provides a deep understanding of the role of key chemical components of EPS in biofilm development of V. parahaemolyticus, which may give a new strategy to develop environmentally friendly methods to eradicate the biofilms in food industry.

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Extracellular polymeric substances govern the development of biofilm and mass transfer of polycyclic aromatic hydrocarbons for improved biodegradation

Cited by 120 publications

References 34 publications

Polycyclic aromatic hydrocarbons removal by immobilized bacterial cells using annonaceous acetogenins for biofilm formation stimulation on polyurethane foam

Polycyclic aromatic hydrocarbons removal by immobilized bacterial cells using annonaceous acetogenins for biofilm formation stimulation on polyurethane foam

Memory Effect of Aquatic Biofilms in the Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) and Polychlorinated Biphenyls (PCBs) in Water Streams

Insights Into the Role of Extracellular DNA and Extracellular Proteins in Biofilm Formation of Vibrio parahaemolyticus

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