Anaerobic Dechlorination by a Humin-Dependent Pentachlorophenol-Dechlorinating Consortium under Autotrophic Conditions Induced by Homoacetogenesis
Abstract
:1. Introduction
2. Materials and Methods
2.1. Humin
2.2. Humin-Dependent PCP-Dechlorinating Culture (HMBC Culture)
2.3. Homoacetogenic Culture (HC Culture)
2.4. Humin-Dependent PCP-Dechlorinating Culture with Acetogenic Activity (M-CO Culture)
2.5. Effect of Conditions on the PCP Dechlorination in the Mixed Consortium M-CO
2.6. Oxidized Humin Preparation
2.7. Chemical and Headspace Analyses
2.8. Microbial Community Structure
3. Results
3.1. Dechlorination of PCP by M-CO Culture
3.2. Inhibitory Factors in the M-CO Culture
3.3. Role of Humin in Reductive Dechlorination
3.4. Microbial Composition of M-CO Culture
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Condition Name | Humin (1 g) | Humin State | Medium | Headspace Composition | Composition of Inoculum | Additional Treatment | |
---|---|---|---|---|---|---|---|
10% (v/v) HMBC | 5% (v/v) HC | ||||||
M-CO | + | Intact | medium Z | H2/CO2 | + | + | − |
CO | − | − | medium Z | H2/CO2 | + | + | − |
HC-PCP | − | − | medium Z | H2/CO2 | + | − | − |
Basal | + | Intact | medium Z | H2/CO2 | − | − | − |
M-CO-B | + | Intact | medium ZN | H2/CO2 | + | + | − |
MCO-Na2S | + | Intact | medium ZN | H2/CO2 | + | + | 1.21 mM Na2S |
oxd-H2 | + | Oxidized | medium ZN | H2/CO2 | + | + | − |
oxd-N2 | + | Oxidized | medium ZN | N2/CO2 | + | + | − |
PCP-Sulfate | + | Intact | medium PCP | N2/CO2 | + | − | 0.5 g/L NA2SO4 |
PCP-Sal | + | Intact | medium PCP | N2/CO2 | + | − | 2.25 g/L NaCl |
Culture Name | Hydrogen Used | Electron Sink | Electron Balance ** | |||
---|---|---|---|---|---|---|
Acetate Produced | Methane Produced | Sulfate Reduction | Dechlorination | |||
M-CO | 3.973 | 0.062 | 3.366 | 0.484 | 0.003 | 0.061 |
M-CO-B | 3.082 | 0.067 | 2.576 | - | 0.010 | 0.429 |
oxd-H2 | 4.942 | 0.455 | 5.096 | - | 0.010 | −0.619 |
oxd-N2 | - | - | 0.784 | - | 0.008 | −0.776 |
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Laskar, M.; Awata, T.; Kasai, T.; Katayama, A. Anaerobic Dechlorination by a Humin-Dependent Pentachlorophenol-Dechlorinating Consortium under Autotrophic Conditions Induced by Homoacetogenesis. Int. J. Environ. Res. Public Health 2019, 16, 2873. https://doi.org/10.3390/ijerph16162873
Laskar M, Awata T, Kasai T, Katayama A. Anaerobic Dechlorination by a Humin-Dependent Pentachlorophenol-Dechlorinating Consortium under Autotrophic Conditions Induced by Homoacetogenesis. International Journal of Environmental Research and Public Health. 2019; 16(16):2873. https://doi.org/10.3390/ijerph16162873
Chicago/Turabian StyleLaskar, Mahasweta, Takanori Awata, Takuya Kasai, and Arata Katayama. 2019. "Anaerobic Dechlorination by a Humin-Dependent Pentachlorophenol-Dechlorinating Consortium under Autotrophic Conditions Induced by Homoacetogenesis" International Journal of Environmental Research and Public Health 16, no. 16: 2873. https://doi.org/10.3390/ijerph16162873