Assessment of the performance of SMFCs in the bioremediation of PAHs in contaminated marine sediments under different redox conditions and analysis of the associated microbial communities

Hamdan, Hamdan Z.; Salam, Darine A.; Hari, Ananda Rao; Semerjian, Lucy; Saikaly, Pascal E.

doi:10.1016/j.scitotenv.2016.09.232

Cited by 56 publications

(13 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analysis of the anodic bacterial community using 16S rDNA gene pyrosequencing revealed the enrichment of genera with potential exoelectrogenic capability31. And this has significant implications in determining the microbial community structure in SMFCs in each aquatic environment and consequently the fate and removal kinetics of organic pollutants in contaminated sediments32.…”

Section: Resultsmentioning

confidence: 99%

A Pilot-scale Benthic Microbial Electrochemical System (BMES) for Enhanced Organic Removal in Sediment Restoration

Tian²,

et al. 2017

Sci Rep

View full text Add to dashboard Cite

A benthic microbial electrochemical systems (BMES) of 195 L (120 cm long, 25 cm wide and 65 cm height) was constructed for sediment organic removal. Sediment from a natural river (Ashi River) was used as test sediments in the present research. Three-dimensional anode (Tri-DSA) with honeycomb structure composed of carbon cloth and supporting skeleton was employed in this research for the first time. The results demonstrated that BMES performed good in organic-matter degradation and energy generation from sediment and could be considered for river sediments in situ restoration as novel method. Community analysis from the soil and anode using 16S rDNA gene sequencing showed that more electrogenic functional bacteria was accumulated in anode area when circuit connected than control system.

show abstract

Section: Resultsmentioning

confidence: 99%

A Pilot-scale Benthic Microbial Electrochemical System (BMES) for Enhanced Organic Removal in Sediment Restoration

Tian²,

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…At 120 h of MFC operation, the maximal removal of naphthalene (NAP, 97.6%) and PHE (42.9%) was much higher than that of PYR (22%). In recent MFC studies, despite higher start concentration of LMW PAHs (e.g., Li et al, 2018Li et al, , 2019aLiang et al, 2020) (Figure 1A), three-ring PAHs were more easily degraded than most examined HMW PAHs (e.g., Hamdan et al, 2017;Liu et al, 2019;Yu et al, 2019) (Figure 1B). In fact, the enhancement efficiency of PAH degradation is mainly determined by the hydrophilicity, toxicity and bioavailability.…”

Section: Separate Degradation Vs Mixed Degradationmentioning

confidence: 90%

“…Fe 3+ /Fe cycling, via indirect electron transfer, is involved in power output and PAH degradation started by the increased abundance of Geobacter (Zhou et al, 2016). Fe 3+ and sulfate assist in PAH removal in SMFC, and the anode is main TEA triggering PAH degradation and maintaining stable voltage (Hamdan et al, 2017).…”

Section: Anode Microbe As Exoelectrogenmentioning

confidence: 99%

The Utility of Electrochemical Systems in Microbial Degradation of Polycyclic Aromatic Hydrocarbons: Discourse, Diversity and Design

Hao

Li²,

Xiao

et al. 2020

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…7, at phylum level, the Bacteroidetes accounted for the highest proportion in the anode chamber (33.9%), followed by Firmicutes and Proteobacteria, accounting for 30.7% and 26.1%, respectively. Studies by Cabezas show that Proteobacteria and Bacteroidetes contain a variety of electrogenic microorganisms [37,38]. Proteobacteria were enriched in the MDCs, and Bacteroidetes could metabolize some easily degraded organic matter and improve the metabolism of co-plasma to co-substrate [39].…”

Section: Analysis Of Microbial Community Structure Characteristicsmentioning

confidence: 99%

Simultaneous bioelectricity generation, desalination, organics degradation, and nitrogen removal in air–cathode microbial desalination cells

Zhao²,

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

In this study, a three-chamber air-cathode microbial desalination cell (AMDC) was constructed using activated sludge as the inoculating microbial source and carbon cloth as the electrode. The simultaneous bioelectricity generation, desalination, degradation of organic compounds, and nitrogen removal in the AMDC having different electrode spacings (16, 12, and 8 cm) provided an insight into the microbial community. The experimental results showed that with a gradual decrease in the electrode spacing, electricity production and desalination performance first increased and then decreased. While AMDC1 with 16 cm electrode spacing became active faster than other cells and reached a peak voltage of 598 mV on the tenth day, AMDC2 with 12 cm electrode spacing showed the best start-up performance with a maximum output voltage of 645 mV, maximum power density of 214.7 mW/m 3 , and minimum resistance of 516.9 Ω. AMDC3 with 8 cm electrode spacing reached a peak voltage of 598 mV, which was between those of AMDC1 and AMDC2. The three AMDCs were run until the end of the cycle, and there was no significant difference in their ammonium removal rate and chemical oxygen demand. For AMDC1-3, the desalination rates were 84.86%, 87.71%, and 83.43%, and the Coulomb efficiencies were 17.29%, 18.60%, and 17.95%, respectively. Further, scanning electron microscopy showed that a large number of microorganisms could attach to the surface of the anode carbon cloth electrode; 16S rRNA sequencing showed that the typical electrogenic microbial communities were Bacillus (11.6%) and Arcobacter (9.6%). As the poor performance of the AMDC was primarily due to a lack of electrogenic microorganisms in the active function of the anode chamber, screening the functional microorganisms provided a reference for optimizing and amplifying the application of microbial desalination cells in practical research.

show abstract

Assessment of the performance of SMFCs in the bioremediation of PAHs in contaminated marine sediments under different redox conditions and analysis of the associated microbial communities

Cited by 56 publications

References 39 publications

A Pilot-scale Benthic Microbial Electrochemical System (BMES) for Enhanced Organic Removal in Sediment Restoration

A Pilot-scale Benthic Microbial Electrochemical System (BMES) for Enhanced Organic Removal in Sediment Restoration

The Utility of Electrochemical Systems in Microbial Degradation of Polycyclic Aromatic Hydrocarbons: Discourse, Diversity and Design

Simultaneous bioelectricity generation, desalination, organics degradation, and nitrogen removal in air–cathode microbial desalination cells

Contact Info

Product

Resources

About