Biochar-enhanced anaerobic mixed culture for biodegradation of 1,2-dichloroethane: Microbial community, mechanisms, and techno-economics

Hasanan, Khaled; Badr, Omnia A.; El-Meihy, Rasha; Nasr, Mahmoud; Tawfik, Ahmed

doi:10.1016/j.chemosphere.2024.141666

Cited by 3 publications

(1 citation statement)

References 48 publications

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“…The adsorption and degradation capabilities of biochar and its composites provide a conducive growth environment for microorganisms, promoting the bioconversion of CHCs. A study on the degradation of 1,2-dichloroethane by microorganisms associated with biochar ( Hasanan et al, 2024 ) found that an increase in the abundance of bacterial communities was observed after the addition of biochar, with the presence of Bacillus (from 1. 04 to 2.3%), Bacteroidetes (from 16.5 to 20.5%), Clostridium (from 3.4 to 5.7%), Cyanobacteria (from 0.07 to 5.6%), Spirillum (from 0.9 to 1.8%), and Micrococcus wartyi (from 2.9 to 3.5%).…”

Section: Synergistic Microbial Treatment Of Biochar and Its Compositesmentioning

confidence: 99%

Biochar, microbes, and biochar-microbe synergistic treatment of chlorinated hydrocarbons in groundwater: a review

Niu,

Li,

Gao

et al. 2024

Front. Microbiol.

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Dehalogenating bacteria are still deficient when targeted to deal with chlorinated hydrocarbons (CHCs) contamination: e.g., slow metabolic rates, limited substrate range, formation of toxic intermediates. To enhance its dechlorination capacity, biochar and its composites with appropriate surface activity and biocompatibility are selected for coupled dechlorination. Because of its special surface physical and chemical properties, it promotes biofilm formation by dehalogenating bacteria on its surface and improves the living environment for dehalogenating bacteria. Next, biochar and its composites provide active sites for the removal of CHCs through adsorption, activation and catalysis. These sites can be specific metal centers, functional groups or structural defects. Under microbial mediation, these sites can undergo activation and catalytic cycles, thereby increasing dechlorination efficiency. However, there is a lack of systematic understanding of the mechanisms of dechlorination in biogenic and abiogenic systems based on biochar. Therefore, this article comprehensively summarizes the recent research progress of biochar and its composites as a “Taiwan balm” for the degradation of CHCs in terms of adsorption, catalysis, improvement of microbial community structure and promotion of degradation and metabolism of CHCs. The removal efficiency, influencing factors and reaction mechanism of the degraded CHCs were also discussed. The following conclusions were drawn, in the pure biochar system, the CHCs are fixed to its surface by adsorption through chemical bonds on its surface; the biochar composite material relies on persistent free radicals and electron shuttle mechanisms to react with CHCs, disrupting their molecular structure and reducing them; biochar-coupled microorganisms reduce CHCs primarily by forming an “electron shuttle bridge” between biological and non-biological organisms. Finally, the experimental directions to be carried out in the future are suggested to explore the optimal solution to improve the treatment efficiency of CHCs in water.

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Section: Synergistic Microbial Treatment Of Biochar and Its Compositesmentioning

confidence: 99%

Biochar, microbes, and biochar-microbe synergistic treatment of chlorinated hydrocarbons in groundwater: a review

Niu,

Li,

Gao

et al. 2024

Front. Microbiol.

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Synergistic interaction of biochar, Phragmites australis, and rhizosphere microorganisms for enhanced 1,4-dioxane biodegradation

Tawfik,

Alhajeri,

Nasr

2024

Journal of Water Process Engineering

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Rock Surface Colonization by Groundwater Microorganisms in an Aquifer System in Quebec, Canada

Patel,

Blouin,

Kirkpatrick

et al. 2024

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Aquifers are rich in microbial diversity. However, there is a lack of information about sessile communities in these environments because of the difficulty in sampling fresh in situ rock surfaces. Thus, this study’s objective was to better understand the sessile community in a fractured aquifer. Additionally, the impact of the rock mineral composition on microbial community composition during colonization was explored. Using a system of bioreactors, we recreated the environmental conditions of a 1.5 m deep aquifer in Covey Hill (QC, Canada) using groundwater samples collected from the site. We carried out 16S/18S rRNA amplicon sequencing of the water and sessile communities after 24 days of incubation. Our data showed that many microbial taxa overlapped between the sessile and planktonic communities, indicating colonization of the solid surfaces. Quartz and feldspar had a significant impact on bacterial community structure. Sessile communities were dominated by Gaillonella, Alkanindiges, unclassified Acetobacteraceae, Apoikiales, Glissomonadida, and Synurales. We could not detect any Archaea in the sessile community. The sessile communities contained bacterial genera involved in iron cycling and adapted to acidic and low-carbon-concentration environments. Eukaryotic predators dominated the sessile community.

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Biochar-enhanced anaerobic mixed culture for biodegradation of 1,2-dichloroethane: Microbial community, mechanisms, and techno-economics

Cited by 3 publications

References 48 publications

Biochar, microbes, and biochar-microbe synergistic treatment of chlorinated hydrocarbons in groundwater: a review

Biochar, microbes, and biochar-microbe synergistic treatment of chlorinated hydrocarbons in groundwater: a review

Synergistic interaction of biochar, Phragmites australis, and rhizosphere microorganisms for enhanced 1,4-dioxane biodegradation

Rock Surface Colonization by Groundwater Microorganisms in an Aquifer System in Quebec, Canada

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