Evaluation of three activated carbons for combined adsorption and biodegradation of PCBs in aquatic sediment

Mercier, Anne; Joulian, Catherine; Michel, Caroline; Auger, Pascal; Coulon, Stéphanie; Amalric, Laurence; Morlay, Catherine; Battaglia-Brunet, Fabienne

doi:10.1016/j.watres.2014.04.021

Cited by 39 publications

(23 citation statements)

References 55 publications

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“…Among the 14 selected classes, the Anaerolineae was found negatively correlated with the concentration of dichlorinated biphenyls ( r 2 = -0.660, P < 0.01) ( Table 3 ). Previous studies have revealed that the phylum Chloroflexi was one of the several most abundant groups associated with Aroclor 1242 degradation ( Mercier et al, 2014 ) or perchloroethene (PCE) dechloronation ( Kittelmann and Friedrich, 2008 ). Mercier et al (2014) found that Chloroflexi was the second-most abundant phylum shared between three granular activated carbons which were incubated for a month with Aroclor 1242 spiked sediment, and the Anaerolineae class was found dominated in this phylum.…”

Section: Resultsmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungal Hyphae Alter Soil Bacterial Community and Enhance Polychlorinated Biphenyls Dissipation

Qin

Brookes

2016

Front. Microbiol.

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We investigated the role of arbuscular mycorrhizal fungal (AMF) hyphae in alternation of soil microbial community and Aroclor 1242 dissipation. A two-compartment rhizobox system with double nylon meshes in the central was employed to exclude the influence of Cucurbita pepo L. root exudates on hyphal compartment soil. To assess the quantitative effect of AMF hyphae on soil microbial community, we separated the hyphal compartment soil into four horizontal layers from the central mesh to outer wall (e.g., L1–L4). Soil total PCBs dissipation rates ranged from 35.67% of L4 layer to 57.39% of L1 layer in AMF inoculated treatment, which were significant higher than the 17.31% of the control (P < 0.05). The dissipation rates of tri-, tetrachlorinated biphenyls as well as the total PCBs were significantly correlated with soil hyphal length (P < 0.01). Real-time quantitative PCR results indicated that the Rhodococcus-like bphC gene was 2–3 orders of magnitude more than that of Pseudomonas-like bphC gene, and was found responded positively to AMF. Phylogenetic analyses of the 16S rDNA sequenced by the Illumina Miseq sequencing platform indicated that AMF hyphae altered bacterial community compositions. The phylum Betaproteobacteria and Actinobacteria were dominated in the soil, while Burkholderiales and Actinomycetales were dominated at the order level. Taxa from the Comamonadaceae responded positively to AMF and trichlorinated biphenyl dissipation, while taxa from the Oxalobacteraceae and Streptomycetaceae responded negatively to AMF and PCB congener dissipation. Our results suggested that the AMF hyphal exudates as well as the hyphae per se did have quantitative effects on shaping soil microbial community, and could modify the PCBs dissipation processes consequently.

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Section: Resultsmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungal Hyphae Alter Soil Bacterial Community and Enhance Polychlorinated Biphenyls Dissipation

Qin

Brookes

2016

Front. Microbiol.

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“…From the joint assessment of biodegradation and desorption, the following two conjectures were proposed: First, free aqueous phase nonylphenol was preferentially degraded [ 15 ], breaking the equilibrium between adsorption and desorption, promoting desorption of nonylphenol from biochar and converting the desorbed fractions into bioavailable form. Second, the microorganisms and nonylphenol were both adsorbed to biochar, allowing processes such as biofilm formation and the release of extracellular enzymes to contribute directly to the biodegradation of adsorbed nonylphenol [ 25 , 26 ]. As shown in Fig 4 , f r was still the major component in the system after 16 days of desorption, suggesting a limited extent of desorption for the resistant fraction [ 14 ]; thus, it was reasonable to conclude that the reduction of f r was predominantly due to direct degradation by microorganisms.…”

Section: Resultsmentioning

confidence: 99%

“…Tong et al found that 1% biochar accelerated PCP transformation from 12.5% to 60.7%, and 100% transformation rate was observed when a 5% dosage of biochar was added [ 21 ]. A possible explanation may be that the microorganisms were capable of adhering to or forming biofilms on biochar particles by releasing extracellular enzymes, which constitutes an important mechanism to overcome mass-transfer limitations in environmental remediation [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Rice-Straw Biochar and Microorganisms in Nonylphenol Remediation: Adsorption-Biodegradation Coupling Relationship and Mechanism

et al. 2015

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Biochar adsorption presents a potential remediation method for the control of hydrophobic organic compounds (HOCs) pollution in the environment. It has been found that HOCs bound on biochar become less bioavailable, so speculations have been proposed that HOCs will persist for longer half-life periods in biochar-amended soil/sediment. To investigate how biochar application affects coupled adsorption-biodegradation, nonylphenol was selected as the target contaminant, and biochar derived from rice straw was applied as the adsorbent. The results showed that there was an optimal dosage of biochar in the presence of both adsorption and biodegradation for a given nonylphenol concentration, thus allowing the transformation of nonylphenol to be optimized. Approximately 47.6% of the nonylphenol was biodegraded in two days when 0.005 g biochar was added to 50 mg/L of nonylphenol, which was 125% higher than the relative quantity biodegraded without biochar, though the resistant desorption component of nonylphenol reached 87.1%. All adsorptive forms of nonylphenol (f rap, f slow, f r) decreased gradually during the biodegradation experiment, and the resistant desorption fraction of nonylphenol (f r) on biochar could also be biodegraded. It was concluded that an appropriate amount of biochar could stimulate biodegradation, not only illustrating that the dosage of biochar had an enormous influence on the half-life periods of HOCs but also alleviating concerns that enhanced HOCs binding by biochar may cause secondary pollution in biochar-modified environment.

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“…[4] For this reason, a large number of studies aimed at solving this pollution problem has been reported. [1,[5][6][7] The degradation of PCBs has been studied using various chemical and biological processes such as incineration, [8] biodegradation with fungi and bacteria, [9,10] radiolytic degradation using Co 60 as source of γ rays, [11] as well as some advanced oxidation processes (AOPs). [5,12] However, there are still some limitations in the application of these methods.…”

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confidence: 99%

Photo-assisted electrochemical degradation of polychlorinated biphenyls with boron-doped diamond electrodes

Gutiérrez-Hernández

Bello-Mendoza

Hernández-Ramírez

et al. 2017

Environmental Technology

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The capacity of the photo electro-Fenton (PEF) process to degrade a mixture of seven polychlorinated biphenyl (PCB) congeners was studied. Boron-doped diamond (BDD) sheets were used as anode and cathode in the experimental electrolytic cell that contained NaSO 0.05 M at pH 3 as supporting electrolyte for the electro generation of HO at the cathode. The effects of UV light intensity (254 and 365 nm), current density (8, 16 and 24 mA cm) and ferrous ion dosage (0.1, 0.2 and 0.3 mM) on PCB (C = 50 μg L) degradation were evaluated. The highest level of PCB degradation (97%) was achieved with 16 mA cm of current density, 0.1 mM of ferrous ion and UV light at 365 nm as irradiation source after 6 h of reaction. PCB28, PCB52 and PCB101 were not detected after 0.5, 1.5 and 3 h of reaction, respectively. The degradation of PCB138, PCB153, PCB180 and PCB209 was also high (>95%). The PEF system outperformed other oxidation processes (electro-Fenton, anodic oxidation, Fenton, photo-Fenton and UV photolysis) in terms of reaction rate and degradation efficiency. These results demonstrate for the first time the degradation of PCB209, the most highly chlorinated PCB congener, by an advanced electrochemical oxidation process.

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Evaluation of three activated carbons for combined adsorption and biodegradation of PCBs in aquatic sediment

Cited by 39 publications

References 55 publications

Arbuscular Mycorrhizal Fungal Hyphae Alter Soil Bacterial Community and Enhance Polychlorinated Biphenyls Dissipation

Arbuscular Mycorrhizal Fungal Hyphae Alter Soil Bacterial Community and Enhance Polychlorinated Biphenyls Dissipation

Application of Rice-Straw Biochar and Microorganisms in Nonylphenol Remediation: Adsorption-Biodegradation Coupling Relationship and Mechanism

Photo-assisted electrochemical degradation of polychlorinated biphenyls with boron-doped diamond electrodes

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