101
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Miran W, Jang J, Nawaz M, Shahzad A, Lee DS. Biodegradation of the sulfonamide antibiotic sulfamethoxazole by sulfamethoxazole acclimatized cultures in microbial fuel cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:1058-1065. [PMID: 29426125 DOI: 10.1016/j.scitotenv.2018.01.326] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/12/2018] [Accepted: 01/31/2018] [Indexed: 06/08/2023]
Abstract
Microbial fuel cells (MFCs) are known for their ability to enhance the removal rate of toxins while generating power. This research presents a performance assessment of MFCs for power generation and sulfamethoxazole (SMX) degradation using SMX acclimatized cultures. Experiments were performed in MFC batch mode using different SMX concentrations in synthetic wastewater. The experimental results showed that voltage generation was >400mV up to the SMX concentration of 0.20mM (at 400Ω external resistance). Control experiments supported the inference that biodegradation was the main process for SMX removal compared to sorption by SMX acclimatized cultures and that the process results in efficient removal of SMX in MFC mode. The specific removal rates of SMX in MFC with SMX acclimatized sludge were 0.67, 1.37, 3.43, 7.32, and 13.36μm/h at initial SMX concentrations of 0.04, 0.08, 0.20, 0.39, and 0.79mM, respectively. Moreover, the MFC was able to remove >90% of the TOC from the wastewater up to SMX concentrations of 0.08mM. However, this TOC removal produces negative effects at higher SMX concentrations due to toxic intermediates. Microbial community analysis revealed large changes in bacterial communities at the phylum, class, and genus levels after SMX acclimatization and MFC operation. Thauera, a well-known aromatic-degrading bacteria, was the most dominant genus present in post-acclimatized conditions. In summary, this study showed that acclimatized sludge can play an important role in the biodegradation of SMX in MFCs.
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Affiliation(s)
- Waheed Miran
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jiseon Jang
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Mohsin Nawaz
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Asif Shahzad
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Dae Sung Lee
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
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102
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Li Y, Li X, Sun Y, Zhao X, Li Y. Cathodic microbial community adaptation to the removal of chlorinated herbicide in soil microbial fuel cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:16900-16912. [PMID: 29623641 DOI: 10.1007/s11356-018-1871-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 03/26/2018] [Indexed: 06/08/2023]
Abstract
The microbial fuel cell (MFC) that uses a solid electrode as the inexhaustible electron acceptor is an innovative remediation technology that simultaneously generates bioelectricity. Chlorinated pollutants are better metabolized by reductive dechlorination in proximity to the cathode. Here, the removal efficiency of the herbicide metolachlor (ML) increased by 262 and 176% in soil MFCs that were spiked with 10 (C10) and 20 mg/kg (C20) of ML, respectively, relative to the non-electrode controls. The bioelectricity output of the C10 and C20 increased by over two- and eightfold, respectively, compared to that of the non-ML control, with maximum current densities of 49.6 ± 2.5 (C10) and 78.9 ± 0.6 mA/m2 (C20). Based on correlations between ML concentrations and species abundances in the MFCs, it was inferred that Azohydromonas sp., Sphingomonas sp., and Pontibacter sp. play a major role in ML removal around the cathode, with peak removal efficiencies of 56 ± 1% (C10) and 58 ± 1% (C20). Moreover, Clostridium sp., Geobacter sp., Bacillus sp., Romboutsia sp., and Terrisporobacter sp. may be electricigens or closely related microbes due to the significant positive correlation between the bioelectricity generation levels and their abundances around the anode. This study suggests that a directional adaptation of the microbial community has taken place to increase both the removal of chlorinated herbicides around the cathode and the generation of bioelectricity around the anode in bioelectrochemical remediation systems.
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Affiliation(s)
- Yue Li
- College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin, 300191, People's Republic of China
| | - Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin, 300191, People's Republic of China.
| | - Yang Sun
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin, 300191, People's Republic of China
| | - Xiaodong Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin, 300191, People's Republic of China
| | - Yongtao Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin, 300191, People's Republic of China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
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103
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Zhang G, Zhang H, Yang F, Zhang R, Wang J. Sequencing polarity-inverting microbial fuel cell for wastewater treatment. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.01.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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104
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Li X, Zhao Q, Wang X, Li Y, Zhou Q. Surfactants selectively reallocated the bacterial distribution in soil bioelectrochemical remediation of petroleum hydrocarbons. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:23-32. [PMID: 29028494 DOI: 10.1016/j.jhazmat.2017.09.050] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/30/2017] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
Soil contaminated by aged petroleum hydrocarbons is faced with scarcity of electron acceptors, low activity of functional microbes and inefficient electron transfer, which hinder the bioremediation application. The soil microbial fuel cell (MFC) simultaneously solves these problems with bioelectricity production. In this study, five types of surfactants were introduced to enhance the bioavailability of aged petroleum hydrocarbon in soils. The ampholytic surfactant (lecithos) was optimal due to the highest bioelectricity generation (0.321Cd-1g-1) and promoted hydrocarbon degradation (328%), while the nonionic (glyceryl monostearate) and cationic (cetyltrimethylammonium bromide) surfactants were inefficient. The surfactants induced a special microbial enrichment affiliated with Proteobacteria, Firmicutes, Bacteroidetes, Actinobacteria, Chloroflexi, Planctomycetes and Acidobacteria (93%-99% of total) in soil MFCs. The anionic surfactant (sodium dodecyl sulfate) exhibited the strongest selectivity, and α-proteobacteria and γ-proteobacteria abundances decreased while Clostridia increased, much like the result obtained with the biosurfactant β-cyclodextrin. Furthermore, Bacillus abundance was increased in connected soil MFCs, except addition of lecithos in which Clostridium increased to 14.88% from 3.61% in the control. The high correlations among Bacillus, Phenylobacterium, Solibacillus (0.9162-0.9577) and among Alcaligenes, Dysgonomonas, Sedimentibacter (0.9538-0.9966) indicated a metabolic network of microorganisms in the soil bioelectrochemical remediation system.
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Affiliation(s)
- Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, No. 31 Fukang Road, Nankai District, Tianjin 300191, China.
| | - Qian Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, No. 31 Fukang Road, Nankai District, Tianjin 300191, China.
| | - Xin Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
| | - Yongtao Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, No. 31 Fukang Road, Nankai District, Tianjin 300191, China.
| | - Qixing Zhou
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
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105
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Kong L, Gao Y, Zhou Q, Zhao X, Sun Z. Biochar accelerates PAHs biodegradation in petroleum-polluted soil by biostimulation strategy. JOURNAL OF HAZARDOUS MATERIALS 2018; 343:276-284. [PMID: 28988053 DOI: 10.1016/j.jhazmat.2017.09.040] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 09/19/2017] [Accepted: 09/23/2017] [Indexed: 06/07/2023]
Abstract
Sawdust and wheat straw biochars prepared at 300°C and 500°C were applied to petroleum-polluted soil for an 84-day incubation to estimate their effectiveness on polycyclic aromatic hydrocarbons (PAHs) removal. Biochars alone were most effective at reducing PAHs contents. However, adding biochar to soils in company with NaN3 solution resulted in a decreasing trend in terms of PAHs removal, which was even lower than treatment CK without biochar. Moreover, it was discovered by PCR-DGGE files and sequencing analysis that the predominant bacterial diversity slightly decreased but the abundance of some specific taxa, including PAHs degraders, was promoted with biochar input. These results highlighted the potential of biochar application on accelerating PAHs biodegradation, which could be attributed to the properties of biochars that benefit for making the amended soil a better habitat for microbes. The impacts of biochar preparation and pollutants nature on PAHs removal were also determined. Significant reduction in the PAHs contents was detected when adding biochar prepared at a high temperature (500°C), while the feedstocks of biochar showed little effect on PAHs removal. Due to the high hydrophobicity of aromatic rings, high-molecular weight PAHs were found much more resistant to microbial degradation in comparison with low-molecular weight PAHs.
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Affiliation(s)
- Lulu Kong
- Resource and Environment Department, Shijiazhuang University, Hebei, 050000, China; Post-Doctoral Research Station of Ecology, Hebei Normal University, Hebei, 050024, China
| | - Yuanyuan Gao
- College of Environmental Science and Tourism, Nanyang Normal University, Henan, 473061, China
| | - Qixing Zhou
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
| | - Xuyang Zhao
- Resource and Environment Department, Shijiazhuang University, Hebei, 050000, China
| | - Zhongwei Sun
- Resource and Environment Department, Shijiazhuang University, Hebei, 050000, China
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106
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Daghio M, Espinoza Tofalos A, Leoni B, Cristiani P, Papacchini M, Jalilnejad E, Bestetti G, Franzetti A. Bioelectrochemical BTEX removal at different voltages: assessment of the degradation and characterization of the microbial communities. JOURNAL OF HAZARDOUS MATERIALS 2018; 341:120-127. [PMID: 28772251 DOI: 10.1016/j.jhazmat.2017.07.054] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/23/2017] [Accepted: 07/22/2017] [Indexed: 05/20/2023]
Abstract
BTEX compounds (Benzene, Toluene, Ethylbenzene and Xylenes) are toxic hydrocarbons that can be found in groundwater due to accidental spills. Bioelectrochemical systems (BES) are an innovative technology to stimulate the anaerobic degradation of hydrocarbons. In this work, single chamber BESs were used to assess the degradation of a BTEX mixture at different applied voltages (0.8V, 1.0V, 1.2V) between the electrodes. Hydrocarbon degradation was linked to current production and to sulfate reduction, at all the tested potentials. The highest current densities (about 200mA/m2 with a maximum peak at 480mA/m2) were observed when 0.8V were applied. The application of an external voltage increased the removal of toluene, m-xylene and p-xylene. The highest removal rate constants at 0.8V were: 0.4±0.1days-1, 0.34±0.09days-1 and 0.16±0.02days-1, respectively. At the end of the experiment, the microbial communities were characterized by high throughput sequencing of the 16S rRNA gene. Microorganisms belonging to the families Desulfobulbaceae, Desulfuromonadaceae and Geobacteraceae were enriched on the anodes suggesting that both direct electron transfer and sulfur cycling occurred. The cathodic communities were dominated by the family Desulfomicrobiaceae that may be involved in hydrogen production.
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Affiliation(s)
- Matteo Daghio
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy
| | - Anna Espinoza Tofalos
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy; Department of Chemistry, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
| | - Barbara Leoni
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy
| | - Pierangela Cristiani
- Ricerca sul Sistema Energetico - RSE Spa, Department of Sustainable Development and Energy Sources, Via Rubattino, 54, 20134 Milan, Italy
| | - Maddalena Papacchini
- INAIL Settore Ricerca, Certificazione e Verifica, Dipartimento di Innovazione Tecnologica (DIT) Laboratorio di Biotecnologie, Rome, Italy
| | - Elham Jalilnejad
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy; Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
| | - Giuseppina Bestetti
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy.
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107
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Wang J, Song X, Wang Y, Bai J, Li M, Dong G, Lin F, Lv Y, Yan D. Bioenergy generation and rhizodegradation as affected by microbial community distribution in a coupled constructed wetland-microbial fuel cell system associated with three macrophytes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:53-62. [PMID: 28686895 DOI: 10.1016/j.scitotenv.2017.06.243] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Rhizodeposits excreted by various macrophytes might lead to the potential discrepancy of microbial community distribution in constructed wetland coupled with microbial fuel cell (CW-MFC), which has been considered as main factors for the variations of bioelectricity generation during wastewater treatment. In this study, CW-MFC has been associated with three macrophytes (J. effuses, T. orientalis and S. validus) for domestic sewage treatment, also unplanted CW-MFC was performed as a control system. Macrophyte T. orientalis and S. validus can significantly strengthen the bioenergy output in CW-MFC. Highest current (94.27mAm-2) and power densities (21.53mWm-2) were obtained in CW-MFC planted with T. orientalis. Removal efficiencies of COD, NO3-N and NH3-N in CW-MFC planted with S. validus was respectively 5.8%, 7.2%, and 23.9% higher than that of unplanted system. Notably, the oxygen depletion in S. validus CW-MFC reactor during the dark cycle was higher that of other reactors. Results of high-throughput sequencing analysis showed that higher biodiversity was observed in rhizosphere than that of anode material, and the relative abundance of Desulfobulbus sp. and Geobacter sp. has been apparently promoted in the samples of rhizosphere. However, a higher relative abundance of electrochemically active bacteria (Proteobacteria) was observed on the surface of anode electrode material. In addition, microbes (Cytophagales, Clostridium sp., and Dechloromonas sp., and so forth) found in rhizosphere show a capability to decompose refractory contaminants. These contaminants and death roots in the upper part of wetland could be oxidized to fat acids, which may be used as the electrons acceptors for promoting the bioelectricity generation during wastewater treatment.
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Affiliation(s)
- Junfeng Wang
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China
| | - Xinshan Song
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
| | - Yuhui Wang
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
| | - Junhong Bai
- School of Environment, Beijing Normal University, Beijing 100038, China
| | - Manjie Li
- State Key Laboratory Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
| | - Guoqiang Dong
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China
| | - Fanda Lin
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China
| | - Yanfeng Lv
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China
| | - Denghua Yan
- China Institute of Water Resource and Hydropower Research, Beijing 100038, China
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108
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Ojuederie OB, Babalola OO. Microbial and Plant-Assisted Bioremediation of Heavy Metal Polluted Environments: A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14121504. [PMID: 29207531 PMCID: PMC5750922 DOI: 10.3390/ijerph14121504] [Citation(s) in RCA: 333] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/27/2017] [Accepted: 11/30/2017] [Indexed: 11/26/2022]
Abstract
Environmental pollution from hazardous waste materials, organic pollutants and heavy metals, has adversely affected the natural ecosystem to the detriment of man. These pollutants arise from anthropogenic sources as well as natural disasters such as hurricanes and volcanic eruptions. Toxic metals could accumulate in agricultural soils and get into the food chain, thereby becoming a major threat to food security. Conventional and physical methods are expensive and not effective in areas with low metal toxicity. Bioremediation is therefore an eco-friendly and efficient method of reclaiming environments contaminated with heavy metals by making use of the inherent biological mechanisms of microorganisms and plants to eradicate hazardous contaminants. This review discusses the toxic effects of heavy metal pollution and the mechanisms used by microbes and plants for environmental remediation. It also emphasized the importance of modern biotechnological techniques and approaches in improving the ability of microbial enzymes to effectively degrade heavy metals at a faster rate, highlighting recent advances in microbial bioremediation and phytoremediation for the removal of heavy metals from the environment as well as future prospects and limitations. However, strict adherence to biosafety regulations must be followed in the use of biotechnological methods to ensure safety of the environment.
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Affiliation(s)
- Omena Bernard Ojuederie
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag X2046, Mmabatho 2735, South Africa.
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag X2046, Mmabatho 2735, South Africa.
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109
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Kronenberg M, Trably E, Bernet N, Patureau D. Biodegradation of polycyclic aromatic hydrocarbons: Using microbial bioelectrochemical systems to overcome an impasse. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:509-523. [PMID: 28841503 DOI: 10.1016/j.envpol.2017.08.048] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 05/22/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are hardly biodegradable carcinogenic organic compounds. Bioremediation is a commonly used method for treating PAH contaminated environments such as soils, sediment, water bodies and wastewater. However, bioremediation has various drawbacks including the low abundance, diversity and activity of indigenous hydrocarbon degrading bacteria, their slow growth rates and especially a limited bioavailability of PAHs in the aqueous phase. Addition of nutrients, electron acceptors or co-substrates to enhance indigenous microbial activity is costly and added chemicals often diffuse away from the target compound, thus pointing out an impasse for the bioremediation of PAHs. A promising solution is the adoption of bioelectrochemical systems. They guarantee a permanent electron supply and withdrawal for microorganisms, thereby circumventing the traditional shortcomings of bioremediation. These systems combine biological treatment with electrochemical oxidation/reduction by supplying an anode and a cathode that serve as an electron exchange facility for the biocatalyst. Here, recent achievements in polycyclic aromatic hydrocarbon removal using bioelectrochemical systems have been reviewed. This also concerns PAH precursors: total petroleum hydrocarbons and diesel. Removal performances of PAH biodegradation in bioelectrochemical systems are discussed, focussing on configurational parameters such as anode and cathode designs as well as environmental parameters like porosity, salinity, adsorption and conductivity of soil and sediment that affect PAH biodegradation in BESs. The still scarcely available information on microbiological aspects of bioelectrochemical PAH removal is summarised here. This comprehensive review offers a better understanding of the parameters that affect the removal of PAHs within bioelectrochemical systems. In addition, future experimental setups are proposed in order to study syntrophic relationships between PAH degraders and exoelectrogens. This synopsis can help as guide for researchers in their choices for future experimental designs aiming at increasing the power densities and PAH biodegradation rates using microbial bioelectrochemistry.
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Affiliation(s)
| | - Eric Trably
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France
| | - Nicolas Bernet
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France
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110
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Zhou L, Li T, An J, Liao C, Li N, Wang X. Subminimal inhibitory concentration (sub-MIC) of antibiotic induces electroactive biofilm formation in bioelectrochemical systems. WATER RESEARCH 2017; 125:280-287. [PMID: 28866443 DOI: 10.1016/j.watres.2017.08.059] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 08/03/2017] [Accepted: 08/28/2017] [Indexed: 06/07/2023]
Abstract
Electroactive biofilms (EABs) generated from mixed inocula are attractive due to their unique direct extracellular electron transfer abilities and potential use in water pollution control. In this study, for the first time, we identified a chemical that can be used for EAB regulation (both inhibition and promotion). We confirmed that tobramycin, an antibiotic previously demonstrated to inhibit the activity of EABs, is an agonist of EAB formation at subminimal inhibitory concentrations (sub-MICs). Compared to the control, at tobramycin concentrations of 0.05 (1/80 MIC) and 0.1 mg/L (1/40 MIC), the time required to reach 3 A/m2 was shorter, and the limiting current densities increased by 17%. The enhanced EAB activity was primarily attributed to the 50% increase in biomass density from 289 ± 21 to 434 ± 12 μg protein/cm2 and the increased biofilm thickness from 28 ± 1 to 37 ± 0.5 μm. Geobacter species in the microbial communities were selectively increased from 76% to 82%, and their abundance was estimated to increase by 1.63-fold. The accelerated growth was further confirmed using the model strain G. sulfurreducens PCA. Transcriptomic analysis revealed that 0.05 mg/L of tobramycin led to a significant upregulation of genes related to cytochromes and the type IV pilus, suggesting a possible mechanism for the observed current enhancement. These findings extend our knowledge of the regulation of EAB formation by antibiotics and the selective enrichment of Geobacter from a mixed culture, with broader implications on the potential impact of trace antibiotics on the dissimilatory metal reduction process in water environment.
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Affiliation(s)
- Lean Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Tian Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Jingkun An
- School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Chengmei Liao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Nan Li
- School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China.
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111
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Yan Z, He Y, Cai H, Van Nostrand JD, He Z, Zhou J, Krumholz LR, Jiang HL. Interconnection of Key Microbial Functional Genes for Enhanced Benzo[a]pyrene Biodegradation in Sediments by Microbial Electrochemistry. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:8519-8529. [PMID: 28677976 DOI: 10.1021/acs.est.7b00209] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Sediment microbial fuel cells (SMFCs) can stimulate the degradation of polycyclic aromatic hydrocarbons in sediments, but the mechanism of this process is poorly understood at the microbial functional gene level. Here, the use of SMFC resulted in 92% benzo[a]pyrene (BaP) removal over 970 days relative to 54% in the controls. Sediment functions, microbial community structure, and network interactions were dramatically altered by the SMFC employment. Functional gene analysis showed that c-type cytochrome genes for electron transfer, aromatic degradation genes, and extracellular ligninolytic enzymes involved in lignin degradation were significantly enriched in bulk sediments during SMFC operation. Correspondingly, chemical analysis of the system showed that these genetic changes resulted in increases in the levels of easily oxidizable organic carbon and humic acids which may have resulted in increased BaP bioavailability and increased degradation rates. Tracking microbial functional genes and corresponding organic matter responses should aid mechanistic understanding of BaP enhanced biodegradation by microbial electrochemistry and development of sustainable bioremediation strategies.
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Affiliation(s)
- Zaisheng Yan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences , Nanjing 210008, China
| | - Yuhong He
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences , Nanjing 210008, China
| | - Haiyuan Cai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences , Nanjing 210008, China
| | - Joy D Van Nostrand
- Department of Microbiology and Plant Biology, University of Oklahoma , Norman, Oklahoma 73019, United States
| | - Zhili He
- Department of Microbiology and Plant Biology, University of Oklahoma , Norman, Oklahoma 73019, United States
| | - Jizhong Zhou
- Department of Microbiology and Plant Biology, University of Oklahoma , Norman, Oklahoma 73019, United States
- Earth Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Environmental Science and Engineering, Tsinghua University , Beijing 100084, China
| | - Lee R Krumholz
- Department of Microbiology and Plant Biology, University of Oklahoma , Norman, Oklahoma 73019, United States
| | - He-Long Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences , Nanjing 210008, China
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112
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Palma E, Daghio M, Franzetti A, Petrangeli Papini M, Aulenta F. The bioelectric well: a novel approach for in situ treatment of hydrocarbon-contaminated groundwater. Microb Biotechnol 2017; 11:112-118. [PMID: 28696043 PMCID: PMC5743819 DOI: 10.1111/1751-7915.12760] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/02/2017] [Accepted: 06/05/2017] [Indexed: 11/28/2022] Open
Abstract
Groundwater contamination by petroleum hydrocarbons (PHs) is a widespread problem which poses serious environmental and health concerns. Recently, microbial electrochemical technologies (MET) have attracted considerable attention for remediation applications, having the potential to overcome some of the limiting factors of conventional in situ bioremediation systems. So far, field‐scale application of MET has been largely hindered by the limited availability of scalable system configurations. Here, we describe the ‘bioelectric well’ a bioelectrochemical reactor configuration, which can be installed directly within groundwater wells and can be applied for in situ treatment of organic contaminants, such as PHs. A laboratory‐scale prototype of the bioelectric well has been set up and operated in continuous‐flow regime with phenol as the model contaminant. The best performance was obtained when the system was inoculated with refinery sludge and the anode potentiostatically controlled at +0.2 V versus SHE. Under this condition, the influent phenol (25 mg l−1) was nearly completely (99.5 ± 0.4%) removed, with an average degradation rate of 59 ± 3 mg l−1 d and a coulombic efficiency of 104 ± 4%. Microbial community analysis revealed a remarkable enrichment of Geobacter species on the surface of the graphite anode, clearly pointing to a direct involvement of this electro‐active bacterium in the current‐generating and phenol‐oxidizing process.
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Affiliation(s)
- Enza Palma
- Department of Chemistry - Sapienza University of Rome, P.le Aldo Moro 5, Rome, 00185, Italy.,Water Research Institute (IRSA) - National Research Council (CNR), Via Salaria km 29, 300, Monterotondo (RM), 00015, Italy
| | - Matteo Daghio
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, Milan, 20126, Italy
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences - University of Milano-Bicocca, Piazza della Scienza 1, Milan, 20126, Italy
| | | | - Federico Aulenta
- Water Research Institute (IRSA) - National Research Council (CNR), Via Salaria km 29, 300, Monterotondo (RM), 00015, Italy
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113
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Daghio M, Aulenta F, Vaiopoulou E, Franzetti A, Arends JBA, Sherry A, Suárez-Suárez A, Head IM, Bestetti G, Rabaey K. Electrobioremediation of oil spills. WATER RESEARCH 2017; 114:351-370. [PMID: 28279880 DOI: 10.1016/j.watres.2017.02.030] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 01/27/2017] [Accepted: 02/14/2017] [Indexed: 05/20/2023]
Abstract
Annually, thousands of oil spills occur across the globe. As a result, petroleum substances and petrochemical compounds are widespread contaminants causing concern due to their toxicity and recalcitrance. Many remediation strategies have been developed using both physicochemical and biological approaches. Biological strategies are most benign, aiming to enhance microbial metabolic activities by supplying limiting inorganic nutrients, electron acceptors or donors, thus stimulating oxidation or reduction of contaminants. A key issue is controlling the supply of electron donors/acceptors. Bioelectrochemical systems (BES) have emerged, in which an electrical current serves as either electron donor or acceptor for oil spill bioremediation. BES are highly controllable and can possibly also serve as biosensors for real time monitoring of the degradation process. Despite being promising, multiple aspects need to be considered to make BES suitable for field applications including system design, electrode materials, operational parameters, mode of action and radius of influence. The microbiological processes, involved in bioelectrochemical contaminant degradation, are currently not fully understood, particularly in relation to electron transfer mechanisms. Especially in sulfate rich environments, the sulfur cycle appears pivotal during hydrocarbon oxidation. This review provides a comprehensive analysis of the research on bioelectrochemical remediation of oil spills and of the key parameters involved in the process.
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Affiliation(s)
- Matteo Daghio
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy.
| | - Federico Aulenta
- Water Research Institute (IRSA), National Research Council (CNR), Via Salaria km 29,300, 00015 Monterotondo, RM, Italy
| | - Eleni Vaiopoulou
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
| | - Jan B A Arends
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
| | - Angela Sherry
- School of Civil Engineering & Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Ana Suárez-Suárez
- School of Civil Engineering & Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Ian M Head
- School of Civil Engineering & Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Giuseppina Bestetti
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
| | - Korneel Rabaey
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium.
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114
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Ye TR, Song N, Chen M, Yan ZS, Jiang HL. No enhancement of cyanobacterial bloom biomass decomposition by sediment microbial fuel cell (SMFC) at different temperatures. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 218:59-65. [PMID: 27552038 DOI: 10.1016/j.envpol.2016.07.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/01/2016] [Accepted: 07/24/2016] [Indexed: 06/06/2023]
Abstract
The sediment microbial fuel cell (SMFC) has potential application to control the degradation of decayed cyanobacterial bloom biomass (CBB) in sediment in eutrophic lakes. In this study, temperatures from 4 to 35 °C were investigated herein as the major impact on SMFC performance in CBB-amended sediment. Under low temperature conditions, the SMFC could still operate, and produced a maximum power density of 4.09 mW m-2 at 4 °C. Coupled with the high substrate utilization, high output voltage was generated in SMFCs at high temperatures. The application of SMFC affected the anaerobic fermentation progress and was detrimental to the growth of methanogens. At the same time, organic matter of sediments in SMFC became more humified. As a result, the fermentation of CBB was not accelerated with the SMFC application, and the removal efficiency of the total organic matter was inhibited by 5% compared to the control. Thus, SMFC could operate well year round in sediments with a temperature ranging from 4 to 35 °C, and also exhibit practical value by inhibiting quick CBB decomposition in sediments in summer against the pollution of algae organic matter.
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Affiliation(s)
- Tian-Ran Ye
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, China
| | - Na Song
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Mo Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zai-Sheng Yan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - He-Long Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
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115
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Zhao Q, Li R, Ji M, Ren ZJ. Organic content influences sediment microbial fuel cell performance and community structure. BIORESOURCE TECHNOLOGY 2016; 220:549-556. [PMID: 27619708 DOI: 10.1016/j.biortech.2016.09.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 08/31/2016] [Accepted: 09/01/2016] [Indexed: 06/06/2023]
Abstract
This study constructed sediment microbial fuel cells (SMFCs) with different organic loadings without the amendment of external substrates, and it investigated how such variation affects electricity generation and microbial community structure. Results found sediment characteristics significantly influenced SMFC performance and appropriate organic content is important to maintain stable power outputs. SMFCs with loss of ignition (LOI) of 5% showed the most reliable performance in this study, while high organic content (LOI 10-16%) led to higher but very unstable voltage output because of biogas accumulation and worm activities. SMFCs with low organic content (1-3%) showed low power output. Different bacterial communities were found in SMFCs shown various power generation performance even those with similar organic contents. Thermodesulfovibrionaceae was found closely related to the system startup and Desulfobulbaceae showed great abundance in SMFCs with high power production.
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Affiliation(s)
- Qing Zhao
- School of Environmental Science and Engineering, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Ruying Li
- School of Environmental Science and Engineering, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
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116
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Carbon fiber enhanced bioelectricity generation in soil microbial fuel cells. Biosens Bioelectron 2016; 85:135-141. [DOI: 10.1016/j.bios.2016.05.001] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/14/2016] [Accepted: 05/01/2016] [Indexed: 11/18/2022]
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117
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Wu H, Lai C, Zeng G, Liang J, Chen J, Xu J, Dai J, Li X, Liu J, Chen M, Lu L, Hu L, Wan J. The interactions of composting and biochar and their implications for soil amendment and pollution remediation: a review. Crit Rev Biotechnol 2016; 37:754-764. [DOI: 10.1080/07388551.2016.1232696] [Citation(s) in RCA: 223] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Haipeng Wu
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
- Changjiang River Scientific Research Institute, Wuhan, PR China
| | - Cui Lai
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Jie Liang
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Jin Chen
- Changjiang River Scientific Research Institute, Wuhan, PR China
| | - Jijun Xu
- Changjiang River Scientific Research Institute, Wuhan, PR China
| | - Juan Dai
- Changjiang River Scientific Research Institute, Wuhan, PR China
| | - Xiaodong Li
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Junfeng Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Ming Chen
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Lunhui Lu
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Liang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
| | - Jia Wan
- College of Environmental Science and Engineering, Hunan University, Changsha, PR China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, PR China
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118
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Meng L, Liu H, Bao M, Sun P. Microbial community structure shifts are associated with temperature, dispersants and nutrients in crude oil-contaminated seawaters. MARINE POLLUTION BULLETIN 2016; 111:203-212. [PMID: 27485782 DOI: 10.1016/j.marpolbul.2016.07.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/04/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
This study tracked structure shifts of bacterial compositions before, during and after invading by crude oil to determine the microbial response and explore how temperature, dispersants and nutrients affect the composition of microbial communities or their activities of biodegradation in artificial marine environment. During petroleum hydrocarbons exposed, the composition and functional dynamics of marine microbial communities were altered, favoring bacteria that could utilize this rich carbon source such as the Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes phyla. Low temperature as a dominant factor decreased bacterial richness and catabolic diversity due to abated enzymes activities in correlation with the process of biodegradation. Dispersants exerted no negative consequences on microbial composition, however, bacterial composition by the Chloroflexi, TM6, OP8, Cyanobacteria and Gemmatimonadetes phyla increased. It seemed that more frequent fertilizer application could be equally safe to bacteria and increased significantly the abundance of bacterial strains but Actinobacteria phyla decreased.
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Affiliation(s)
- Long Meng
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Han Liu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Mutai Bao
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Peiyan Sun
- Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, North China Sea Environmental Monitoring Center, State Oceanic Administration, Qingdao 266033, China
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119
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Domínguez-Garay A, Boltes K, Esteve-Núñez A. Cleaning-up atrazine-polluted soil by using Microbial Electroremediating Cells. CHEMOSPHERE 2016; 161:365-371. [PMID: 27448317 DOI: 10.1016/j.chemosphere.2016.07.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/17/2016] [Accepted: 07/06/2016] [Indexed: 06/06/2023]
Abstract
Biodegradation of pollutants in soil is greatly limited by the availability of terminal electron acceptors required for supporting microbial respiration. Such limitation can be overcome if soil-buried electrodes accept the electrons released in the microbial metabolism. We propose the term bioelectroventing for such a environmental treatment. The process would be performed in a device so-called Microbial Electroremediating Cell. Indeed, our studies demonstrate that the presence of electrodes as electron acceptors effectively stimulated by 5-fold the biodegradation rate of the herbicide atrazine (2-chloro-4-ethylamino-6-isopropyl amino-1,3,5-triazine) in comparison with soil natural attenuation. Furthermore, a different set of toxicological test using Pseudokirchneriella subcapitata green alga e, Salmonella typhimorium bacteria and Sorghum saccharatum plant seeds respectively, confirm that atrazine-polluted soil can be effectively cleaned-up in short time by the use of MERCs.
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Affiliation(s)
- Ainara Domínguez-Garay
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala, Madrid, Spain
| | - Karina Boltes
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala, Madrid, Spain; IMDEA-AGUA, Parque Tecnológico de Alcalá, Madrid, Spain
| | - Abraham Esteve-Núñez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala, Madrid, Spain; IMDEA-AGUA, Parque Tecnológico de Alcalá, Madrid, Spain.
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120
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Sarkar J, Kazy SK, Gupta A, Dutta A, Mohapatra B, Roy A, Bera P, Mitra A, Sar P. Biostimulation of Indigenous Microbial Community for Bioremediation of Petroleum Refinery Sludge. Front Microbiol 2016; 7:1407. [PMID: 27708623 PMCID: PMC5030240 DOI: 10.3389/fmicb.2016.01407] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 08/25/2016] [Indexed: 11/18/2022] Open
Abstract
Nutrient deficiency severely impairs the catabolic activity of indigenous microorganisms in hydrocarbon rich environments (HREs) and limits the rate of intrinsic bioremediation. The present study aimed to characterize the microbial community in refinery waste and evaluate the scope for biostimulation based in situ bioremediation. Samples recovered from the wastewater lagoon of Guwahati refinery revealed a hydrocarbon enriched [high total petroleum hydrocarbon (TPH)], oxygen-, moisture-limited, reducing environment. Intrinsic biodegradation ability of the indigenous microorganisms was enhanced significantly (>80% reduction in TPH by 90 days) with nitrate amendment. Preferred utilization of both higher- (>C30) and middle- chain (C20-30) length hydrocarbons were evident from GC-MS analysis. Denaturing gradient gel electrophoresis and community level physiological profiling analyses indicated distinct shift in community's composition and metabolic abilities following nitrogen (N) amendment. High throughput deep sequencing of 16S rRNA gene showed that the native community was mainly composed of hydrocarbon degrading, syntrophic, methanogenic, nitrate/iron/sulfur reducing facultative anaerobic bacteria and archaebacteria, affiliated to γ- and δ-Proteobacteria and Euryarchaeota respectively. Genes for aerobic and anaerobic alkane metabolism (alkB and bssA), methanogenesis (mcrA), denitrification (nirS and narG) and N2 fixation (nifH) were detected. Concomitant to hydrocarbon degradation, lowering of dissolve O2 and increase in oxidation-reduction potential (ORP) marked with an enrichment of N2 fixing, nitrate reducing aerobic/facultative anaerobic members [e.g., Azovibrio, Pseudoxanthomonas and Comamonadaceae members] was evident in N amended microcosm. This study highlighted that indigenous community of refinery sludge was intrinsically diverse, yet appreciable rate of in situ bioremediation could be achieved by supplying adequate N sources.
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Affiliation(s)
- Jayeeta Sarkar
- Department of Biotechnology, Indian Institute of TechnologyKharagpur, India
| | - Sufia K. Kazy
- Department of Biotechnology, National Institute of TechnologyDurgapur, India
| | - Abhishek Gupta
- Department of Biotechnology, Indian Institute of TechnologyKharagpur, India
| | - Avishek Dutta
- School of Bioscience, Indian Institute of TechnologyKharagpur, India
| | - Balaram Mohapatra
- Department of Biotechnology, Indian Institute of TechnologyKharagpur, India
| | - Ajoy Roy
- Department of Biotechnology, National Institute of TechnologyDurgapur, India
| | - Paramita Bera
- Department of Agricultural and Food Engineering, Indian Institute of TechnologyKharagpur, India
| | - Adinpunya Mitra
- Department of Agricultural and Food Engineering, Indian Institute of TechnologyKharagpur, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of TechnologyKharagpur, India
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121
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Li X, Wang X, Zhang Y, Zhao Q, Yu B, Li Y, Zhou Q. Salinity and Conductivity Amendment of Soil Enhanced the Bioelectrochemical Degradation of Petroleum Hydrocarbons. Sci Rep 2016; 6:32861. [PMID: 27597387 PMCID: PMC5011858 DOI: 10.1038/srep32861] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 08/16/2016] [Indexed: 11/17/2022] Open
Abstract
The extreme salinity and high internal resistance of saline-alkali soil contaminated by petroleum hydrocarbons were two key limitations for using the bioelectrochemical remediation. In order to solve two problems, we simply rinsed soil, added carbon fiber to polluted soil. The charge output was enhanced by 110% with increase of the maximum current densities from 81 to 304 mA·m(-2) while hydrocarbons degradation rate enhanced by 484%, especially the high molecular weight fractions (C28-C36 of n-alkanes and 4-6 rings of PAHs). These effects were possibly due to the selective enrichment of species belonged to δ-Proteobacteria (Proteobacteria), Flavobacteriia (Bacteroidetes) or Clostridia (Firmicutes), the activities of biological electron transfer and enzymes. As we know, oxygenase gene that directly decided the process of degradation, was surveyed for the first time in soil bioelectrochemical remediation system. The results confirmed that the bio-current stimulated the activities of naphthalene dioxygenase and xylene monooxygenase and thus the hydrocarbons degradation and the electricity generation. Given that electricity generation and the remediation performance are governed by multiple factors, understanding of microbial community and enzyme gene is crucial to promote the power yield and the bioelectrochemical remediation applicability.
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Affiliation(s)
- Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Yueyong Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Qian Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Binbin Yu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Yongtao Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
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122
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Wang X, Zhou L, Lu L, Lobo FL, Li N, Wang H, Park J, Ren ZJ. Alternating Current Influences Anaerobic Electroactive Biofilm Activity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9169-9176. [PMID: 27485403 DOI: 10.1021/acs.est.6b00813] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Alternating current (AC) is known to inactivate microbial growth in suspension, but how AC influences anaerobic biofilm activities has not been systematically investigated. Using a Geobacter dominated anaerobic biofilm growing on the electrodes of microbial electrochemical reactors, we found that high frequency AC ranging from 1 MHz to 1 kHz (amplitude of 5 V, 30 min) showed only temporary inhibition to the biofilm activity. However, lower frequency (100 Hz, 1.2 or 5 V) treatment led to 47 ± 19% permanent decrease in limiting current on the same biofilm, which is attributed to the action of electrohydrodynamic force that caused biofilm damage and loss of intercellular electron transfer network. Confocal microscopy images show such inactivation mainly occurred at the interface between the biofilm and the electrode. Reducing the frequency further to 1 Hz led to water electrolysis, which generated gas bubbles that flushed all attached cells out of the electrode. These findings provide new references on understanding and regulating biofilm growth, which has broader implications in biofouling control, anaerobic waste treatment, energy and product recovery, and general understanding of microbial ecology and physiology.
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Affiliation(s)
- Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Nankai University , No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Lean Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Nankai University , No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Lu Lu
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Fernanda Leite Lobo
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Nan Li
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University , No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Heming Wang
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Jaedo Park
- Department of Electrical Engineering, University of Colorado Denver , Denver, Colorado 80204, United States
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
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123
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Mao D, Lu L, Revil A, Zuo Y, Hinton J, Ren ZJ. Geophysical Monitoring of Hydrocarbon-Contaminated Soils Remediated with a Bioelectrochemical System. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8205-8213. [PMID: 27386889 DOI: 10.1021/acs.est.6b00535] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Efficient noninvasive techniques are desired for monitoring the remediation process of contaminated soils. We applied the direct current resistivity technique to image conductivity changes in sandbox experiments where two sandy and clayey soils were initially contaminated with diesel hydrocarbon. The experiments were conducted over a 230 day period. The removal of hydrocarbon was enhanced by a bioelectrochemical system (BES) and the electrical potentials of the BES reactors were also monitored during the course of the experiment. We found that the variation in electrical conductivity shown in the tomograms correlate well with diesel removal from the sandy soil, but this is not the case with the clayey soil. The clayey soil is characterized by a larger specific surface area and therefore a larger surface conductivity. In sandy soil, the removal of the diesel and products from degradation leads to an increase in electrical conductivity during the first 69 days. This is expected since diesel is electrically insulating. For both soils, the activity of BES reactors is moderately imaged by the inverted conductivity tomogram of the reactor. An increase in current production by electrochemically active bacteria activity corresponds to an increase in conductivity of the reactor.
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Affiliation(s)
- Deqiang Mao
- Colorado School of Mines, Department of Geophysics, Golden, 80401, Colorado United States
| | - Lu Lu
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - André Revil
- ISTerre, CNRS, UMR CNRS 5275, Université de Savoie, 73376 cedex, Le Bourget du Lac, France
| | - Yi Zuo
- Chevron Energy Technology Company, San Ramon, California 94583, United States
| | - John Hinton
- Colorado School of Mines, Department of Geophysics, Golden, 80401, Colorado United States
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
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Responses of bacterial community and functional marker genes of nitrogen cycling to biochar, compost and combined amendments in soil. Appl Microbiol Biotechnol 2016; 100:8583-91. [PMID: 27338575 DOI: 10.1007/s00253-016-7614-5] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/29/2016] [Accepted: 05/05/2016] [Indexed: 10/21/2022]
Abstract
Biochar and compost are seen as two attractive waste management options and are used for soil amendment and pollution remediation. The interaction between biochar and composting may improve the potential benefits of biochar and compost. We investigated soil physicochemical properties, bacterial community, bacterial 16S rRNA, and functional marker genes of nitrogen cycling of the soil remedied with nothing (S), compost (SC), biochar (SB), a mixture of compost and biochar (SBC), composted biochar (SBced), and a composted mixture of biochar and biomass (SBCing). The results were that all amendments (1) increased the bacterial community richness (except SB) and SBCing showed the greatest efficiency; (2) increased the bacterial community diversity (SBCing > SBC > SC > SBced > SB > S); and (3) changed the gene copy numbers of 16S rRNA, nirK, nirS, and nosZ genes of bacteria, ammonia-oxidizing archaea (AOA), and ammonia-oxidizing bacteria (AOB). All amendments (except SB) could increase the gene copy number of 16S rRNA, and SBCing had the greatest efficiency. The changes of soil bacterial community richness and diversity and the gene copy numbers of 16S rRNA, nirK, nirS, nosZ, AOA, and AOB would affect carbon and nitrogen cycling of the ecosystem and also implied that BCing had the greatest efficiency on soil amendment.
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125
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Li X, Wang X, Zhao Q, Zhang Y, Zhou Q. In Situ Representation of Soil/Sediment Conductivity Using Electrochemical Impedance Spectroscopy. SENSORS 2016; 16:s16050625. [PMID: 27144567 PMCID: PMC4883316 DOI: 10.3390/s16050625] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 03/26/2016] [Accepted: 04/09/2016] [Indexed: 11/16/2022]
Abstract
The electrical conductivity (EC) of soil is generally measured after soil extraction, so this method cannot represent the in situ EC of soil (e.g., EC of soils with different moisture contents) and therefore lacks comparability in some cases. Using a resistance measurement apparatus converted from a configuration of soil microbial fuel cell, the in situ soil EC was evaluated according to the Ohmic resistance (Rs) measured using electrochemical impedance spectroscopy. The EC of soils with moisture content from 9.1% to 37.5% was calculated according to Rs. A significant positive correlation (R² = 0.896, p < 0.01) between the soil EC and the moisture content was observed, which demonstrated the feasibility of the approach. This new method can not only represent the actual soil EC, but also does not need any pretreatment. Thus it may be used widely in the measurement of the EC for soils and sediments.
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Affiliation(s)
- Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China.
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Qian Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Yueyong Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
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126
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Cai Z, Rong Y, Chen J, Wang J, Ma J, Zhang W, Zhao X. Effects of the novel cis-nitromethylene neonicotinoid insecticide Paichongding on enzyme activities and microorganisms in yellow loam and Huangshi soils. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:7786-7793. [PMID: 26755175 DOI: 10.1007/s11356-015-6036-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/30/2015] [Indexed: 06/05/2023]
Abstract
Soil enzyme activity and microbial population play important roles in maintaining soil fertility and ensure crop yield. Paichongding (IPP) is a novel cis-nitromethylene neonicotinoid insecticide, which was recently developed in China. In this study, in order to better understand IPP ecological toxicity, the impact of IPP on soil enzyme activity and microbial population in soils was investigated. The results showed that, urease activity was inhibited by IPP before 75 days incubation, after that this inhibiting effect gradually weakened. IPP had different stimulating effects on the activities of dehydrogenase, protease, and catalase. They were consistently stimulated from the initial time in soils. The results of microbial population indicated that the number of bacteria increased after IPP application compared with the control, fungal number increased before 45 days incubation and then decreased. While actinomycete number decreased during degradation period. DT50 (half-life value), k (degradation rate constant) of IPP in S1 (yellow loam soil), and S2 (Huangshi soil) were found 90 days and 173 days, 0.0077 day(-1), and 0.0040 day(-1), respectively.
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Affiliation(s)
- Zhiqiang Cai
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China.
| | - Yan Rong
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
| | - Jie Chen
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
| | - Jing Wang
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
| | - Jiangtao Ma
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
| | - Wenjie Zhang
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
| | - Xiyue Zhao
- Laboratory of Applied Microbiology, School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, 213164, China
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127
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Rodrigo Quejigo J, Dörfler U, Schroll R, Esteve-Núñez A. Stimulating soil microorganisms for mineralizing the herbicide isoproturon by means of microbial electroremediating cells. Microb Biotechnol 2016; 9:369-80. [PMID: 26880137 PMCID: PMC4835573 DOI: 10.1111/1751-7915.12351] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 01/08/2016] [Accepted: 01/10/2016] [Indexed: 11/30/2022] Open
Abstract
The absence of suitable terminal electron acceptors (TEA) in soil might limit the oxidative metabolism of environmental microbial populations. Microbial electroremediating cells (MERCs) consist in a variety of bioelectrochemical devices that aim to overcome electron acceptor limitation and maximize metabolic oxidation with the purpose of enhancing the biodegradation of a pollutant in the environment. The objective of this work was to use MERCs principles for stimulating soil bacteria to achieve the complete biodegradation of the herbicide 14C‐isoproturon (IPU) to 14CO2 in soils. Our study concludes that using electrodes at a positive potential [+600 mV (versus Ag/AgCl)] enhanced the mineralization by 20‐fold respect the electrode‐free control. We also report an overall profile of the 14C‐IPU metabolites and a 14C mass balance in response to the different treatments. The remarkable impact of electrodes on the microbial activity of natural communities suggests a promising future for this emerging environmental technology that we propose to name bioelectroventing.
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Affiliation(s)
- Jose Rodrigo Quejigo
- University of Alcalá, Alcalá de Henares, Madrid, Spain.,Helmholtz Zentrum München, Múnich, Germany
| | | | | | - Abraham Esteve-Núñez
- University of Alcalá, Alcalá de Henares, Madrid, Spain.,IMDEA-WATER Parque Tecnológico de Alcalá, Madrid, Spain
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128
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Zhou L, Deng D, Zhang D, Chen Q, Kang J, Fan N, Liu Y. Microbial Electricity Generation and Isolation of Exoelectrogenic Bacteria Based on Petroleum Hydrocarbon-contaminated Soil. ELECTROANAL 2016. [DOI: 10.1002/elan.201501052] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Zhou
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Dandan Deng
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Di Zhang
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Qi Chen
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Jingquan Kang
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Ningjuan Fan
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
| | - Ying Liu
- College of Life Sciences; Northwest A&F University; Yangling, Shaanxi PR China 712100
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129
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Singh RP, Reddy CRK. Unraveling the Functions of the Macroalgal Microbiome. Front Microbiol 2016; 6:1488. [PMID: 26779144 PMCID: PMC4700259 DOI: 10.3389/fmicb.2015.01488] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 12/10/2015] [Indexed: 01/11/2023] Open
Abstract
Macroalgae are a diverse group of photosynthetic eukaryotic lower organisms and offer indispensable ecosystem services toward sustainable productivity of rocky coastal areas. The earlier studies have mainly focused on elucidation of the roles of the epiphytic bacterial communities in the ecophysiology of the host macroalga. However, mutualistic interactions have become topic of current interest. It is evident from recent studies that a fraction of epiphytic bacterial communities can be categorized as “core microbial species”, suggesting an obligate association. Epiphytic bacterial communities have also been reported to protect macroalgal surfaces from biofouling microorganisms through production of biologically active metabolites. Because of their intrinsic roles in the host life cycle, the host in turn may provide necessary organic nutrients in order to woo pelagic microbial communities to settle on the host surfaces. However, the precise composition of microbiomes and their functional partnership with hosts are hardly understood. In contrast, the microbial studies associated with human skin and gut and plants have significantly advanced our knowledge on microbiome and their functional interactions with the host. This has led to manipulation of the microbial flora of the human gut and of agricultural plants for improving health and performance. Therefore, it is highly imperative to investigate the functional microbiome that is closely involved in the life cycles of the host macroalgae using high-throughput techniques (metagenomics and metatranscriptomics). The findings from such investigations would help in promoting health and productivity in macroalgal species through regulation of functionally active microbiome.
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Affiliation(s)
- Ravindra Pal Singh
- Laboratory of Microbial Technology, Department of Bioscience and Biotechnology, Graduate School, Faculty of Agriculture, Kyushu UniversityFukuoka, Japan; Seaweed Biology and Cultivation, Division of Marine Biotechnology and Ecology, Council of Scientific and Industrial Research-Central Salt and Marine Chemicals Research InstituteBhavnagar, India
| | - C R K Reddy
- Seaweed Biology and Cultivation, Division of Marine Biotechnology and Ecology, Council of Scientific and Industrial Research-Central Salt and Marine Chemicals Research InstituteBhavnagar, India; Academy of Scientific and Innovative ResearchNew Delhi, India
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130
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Liu Q, Ren ZJ, Huang C, Liu B, Ren N, Xing D. Multiple syntrophic interactions drive biohythane production from waste sludge in microbial electrolysis cells. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:162. [PMID: 27489567 PMCID: PMC4971668 DOI: 10.1186/s13068-016-0579-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 07/27/2016] [Indexed: 05/04/2023]
Abstract
BACKGROUND Biohythane is a new and high-value transportation fuel present as a mixture of biomethane and biohydrogen. It has been produced from different organic matters using anaerobic digestion. Bioenergy can be recovered from waste activated sludge through methane production during anaerobic digestion, but energy yield is often insufficient to sludge disposal. Microbial electrolysis cell (MEC) is also a promising approach for bioenergy recovery and waste sludge disposal as higher energy efficiency and biogas production. The systematic understanding of microbial interactions and biohythane production in MEC is still limited. Here, we report biohythane production from waste sludge in biocathode microbial electrolysis cells and reveal syntrophic interactions in microbial communities based on high-throughput sequencing and quantitative PCR targeting 16S rRNA gene. RESULTS The alkali-pretreated sludge fed MECs (AS-MEC) showed the highest biohythane production rate of 0.148 L·L(-1)-reactor·day(-1), which is 40 and 80 % higher than raw sludge fed MECs (RS-MEC) and anaerobic digestion (open circuit MEC, RS-OCMEC). Current density, metabolite profiles, and hydrogen-methane ratio results all confirm that alkali-pretreatment and microbial electrolysis greatly enhanced sludge hydrolysis and biohythane production. Illumina Miseq sequencing of 16S rRNA gene amplicons indicates that anode biofilm was dominated by exoelectrogenic Geobacter, fermentative bacteria and hydrogen-producing bacteria in the AS-MEC. The cathode biofilm was dominated by fermentative Clostridium. The dominant archaeal populations on the cathodes of AS-MEC and RS-MEC were affiliated with hydrogenotrophic Methanobacterium (98 %, relative abundance) and Methanocorpusculum (77 %), respectively. Multiple pathways of gas production were observed in the same MEC reactor, including fermentative and electrolytic H2 production, as well as hydrogenotrophic methanogenesis and electromethanogenesis. Real-time quantitative PCR analyses showed that higher amount of methanogens were enriched in AS-MEC than that in RS-MEC and RS-OCMEC, suggesting that alkali-pretreated sludge and MEC facilitated hydrogenotrophic methanogen enrichment. CONCLUSION This study proves for the first time that biohythane could be produced directly in biocathode MECs using waste sludge. MEC and alkali-pretreatment accelerated enrichment of hydrogenotrophic methanogen and hydrolysis of waste sludge. The results indicate syntrophic interactions among fermentative bacteria, exoelectrogenic bacteria and methanogenic archaea in MECs are critical for highly efficient conversion of complex organics into biohythane, demonstrating that MECs can be more competitive than conventional anaerobic digestion for biohythane production using carbohydrate-deficient substrates. Biohythane production from waste sludge by MEC provides a promising new way for practical application of microbial electrochemical technology.
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Affiliation(s)
- Qian Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, P.O. Box 2650, 73 Huanghe Road, Nangang District, Harbin, 150090 Heilongjiang China
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309 USA
| | - Cong Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, P.O. Box 2650, 73 Huanghe Road, Nangang District, Harbin, 150090 Heilongjiang China
| | - Bingfeng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, P.O. Box 2650, 73 Huanghe Road, Nangang District, Harbin, 150090 Heilongjiang China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, P.O. Box 2650, 73 Huanghe Road, Nangang District, Harbin, 150090 Heilongjiang China
| | - Defeng Xing
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, P.O. Box 2650, 73 Huanghe Road, Nangang District, Harbin, 150090 Heilongjiang China
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131
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Daghio M, Vaiopoulou E, Patil SA, Suárez-Suárez A, Head IM, Franzetti A, Rabaey K. Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments. Appl Environ Microbiol 2016; 82:297-307. [PMID: 26497463 PMCID: PMC4702649 DOI: 10.1128/aem.02250-15] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Accepted: 10/17/2015] [Indexed: 11/20/2022] Open
Abstract
Hydrocarbons released during oil spills are persistent in marine sediments due to the absence of suitable electron acceptors below the oxic zone. Here, we investigated an alternative bioremediation strategy to remove toluene, a model monoaromatic hydrocarbon, using a bioanode. Bioelectrochemical reactors were inoculated with sediment collected from a hydrocarbon-contaminated marine site, and anodes were polarized at 0 mV and +300 mV (versus an Ag/AgCl [3 M KCl] reference electrode). The degradation of toluene was directly linked to current generation of up to 301 mA m(-2) and 431 mA m(-2) for the bioanodes polarized at 0 mV and +300 mV, respectively. Peak currents decreased over time even after periodic spiking with toluene. The monitoring of sulfate concentrations during bioelectrochemical experiments suggested that sulfur metabolism was involved in toluene degradation at bioanodes. 16S rRNA gene-based Illumina sequencing of the bulk anolyte and anode samples revealed enrichment with electrocatalytically active microorganisms, toluene degraders, and sulfate-reducing microorganisms. Quantitative PCR targeting the α-subunit of the dissimilatory sulfite reductase (encoded by dsrA) and the α-subunit of the benzylsuccinate synthase (encoded by bssA) confirmed these findings. In particular, members of the family Desulfobulbaceae were enriched concomitantly with current production and toluene degradation. Based on these observations, we propose two mechanisms for bioelectrochemical toluene degradation: (i) direct electron transfer to the anode and/or (ii) sulfide-mediated electron transfer.
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Affiliation(s)
- Matteo Daghio
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Eleni Vaiopoulou
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Sunil A Patil
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Ana Suárez-Suárez
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ian M Head
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Korneel Rabaey
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
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132
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Feng C, Liu Y, Li Q, Che Y, Li N, Wang X. Quaternary Ammonium Compound in Anolyte without Functionalization Accelerates the Startup of Bioelectrochemical Systems using Real Wastewater. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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133
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Venkidusamy K, Megharaj M, Marzorati M, Lockington R, Naidu R. Enhanced removal of petroleum hydrocarbons using a bioelectrochemical remediation system with pre-cultured anodes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 539:61-69. [PMID: 26360455 DOI: 10.1016/j.scitotenv.2015.08.098] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 08/02/2015] [Accepted: 08/16/2015] [Indexed: 05/20/2023]
Abstract
Bioelectrochemical remediation (BER) systems such as microbial fuel cells (MFCs) have recently emerged as a green technology for the effective remediation of petroleum hydrocarbon contaminants (PH) coupled with simultaneous energy recovery. Recent research has shown that biofilms previously enriched for substrate degrading bacteria resulted in excellent performance in terms of substrate removal and electricity generation but the effects on hydrocarbon contaminant degradation were not examined. Here we investigate the differences between enriched biofilm anodes and freshly inoculated new anodes in diesel fed single chamber mediatorless microbial fuel cells (DMFC) using various techniques for the enhancement of PH contaminant remediation with concomitant electricity generation. An anodophilic microbial consortium previously selected for over a year through continuous culturing with a diesel concentration of about 800mgl(-1) and which now showed complete removal of this concentration of diesel within 30days was compared to that of a freshly inoculated new anode MFC (showing 83.4% removal of diesel) with a simultaneous power generation of 90.81mW/m(2) and 15.04mW/m(2) respectively. The behaviour of pre-cultured anodes at a higher concentration of PH (8000mgl(-1)) was also investigated. Scanning electron microscopy observation revealed a thick biofilm covering the pre-cultured anodic electrode but not the anode from the freshly inoculated MFC. High resolution imaging showed the presence of thin 60nm diametre pilus-like projections emanating from the cells. Anodic microbial community profiling confirmed that the selection for diesel degrading exoelectrogenic bacteria had occurred. Identification of a biodegradative gene (alkB) provided strong evidence of the catabolic pathway used for diesel degradation in the DMFCs.
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Affiliation(s)
- Krishnaveni Venkidusamy
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes, SA5095, Australia
| | - Mallavarapu Megharaj
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes, SA5095, Australia; Global Centre for Environmental Remediation, Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Massimo Marzorati
- Laboratory for Microbial Ecology and Technology (LabMET), Gent University, 9000 Gent, Belgium
| | - Robin Lockington
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes, SA5095, Australia
| | - Ravi Naidu
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Mawson Lakes, SA5095, Australia; Global Centre for Environmental Remediation, Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW 2308, Australia
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134
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Li X, Wang X, Ren ZJ, Zhang Y, Li N, Zhou Q. Sand amendment enhances bioelectrochemical remediation of petroleum hydrocarbon contaminated soil. CHEMOSPHERE 2015; 141:62-70. [PMID: 26135976 DOI: 10.1016/j.chemosphere.2015.06.025] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 06/04/2015] [Accepted: 06/06/2015] [Indexed: 06/04/2023]
Abstract
Bioelectrochemical system is an emerging technology for the remediation of soils contaminated by petroleum hydrocarbons. However, performance of such systems can be limited by the inefficient mass transport in soil. Here we report a new method of sand amendment, which significantly increases both oxygen and proton transports, resulting to increased soil porosity (from 44.5% to 51.3%), decreased Ohmic resistance (by 46%), and increased charge output (from 2.5 to 3.5Cg(-1)soil). The degradation rates of petroleum hydrocarbons increased by up to 268% in 135d. The degradation of n-alkanes and polycyclic aromatic hydrocarbons with high molecular weight was accelerated, and denaturing gradient gel electrophoresis showed that the microbial community close to the air-cathode was substantially stimulated by the induced current, especially the hydrocarbon degrading bacteria Alcanivorax. The bioelectrochemical stimulation imposed a selective pressure on the microbial community of anodes, including that far from the cathode. These results suggested that sand amendment can be an effective approach for soil conditioning that will enhances the bioelectrochemical removal of hydrocarbons in contaminated soils.
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Affiliation(s)
- Xiaojing Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Yueyong Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Nan Li
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
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135
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Lu L, Zeng C, Wang L, Yin X, Jin S, Lu A, Jason Ren Z. Graphene oxide and H2 production from bioelectrochemical graphite oxidation. Sci Rep 2015; 5:16242. [PMID: 26573014 PMCID: PMC4647224 DOI: 10.1038/srep16242] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 10/12/2015] [Indexed: 11/17/2022] Open
Abstract
Graphene oxide (GO) is an emerging material for energy and environmental applications, but it has been primarily produced using chemical processes involving high energy consumption and hazardous chemicals. In this study, we reported a new bioelectrochemical method to produce GO from graphite under ambient conditions without chemical amendments, value-added organic compounds and high rate H2 were also produced. Compared with abiotic electrochemical electrolysis control, the microbial assisted graphite oxidation produced high rate of graphite oxide and graphene oxide (BEGO) sheets, CO2, and current at lower applied voltage. The resultant electrons are transferred to a biocathode, where H2 and organic compounds are produced by microbial reduction of protons and CO2, respectively, a process known as microbial electrosynthesis (MES). Pseudomonas is the dominant population on the anode, while abundant anaerobic solvent-producing bacteria Clostridium carboxidivorans is likely responsible for electrosynthesis on the cathode. Oxygen production through water electrolysis was not detected on the anode due to the presence of facultative and aerobic bacteria as O2 sinkers. This new method provides a sustainable route for producing graphene materials and renewable H2 at low cost, and it may stimulate a new area of research in MES.
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Affiliation(s)
- Lu Lu
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Cuiping Zeng
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.,The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, P.R. China
| | - Luda Wang
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Xiaobo Yin
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Song Jin
- Department of Civil and Architectural Engineering, University of Wyoming, Laramie, WY 82071, USA
| | - Anhuai Lu
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, P.R. China
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
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136
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Li WW, Yu HQ. Electro-assisted groundwater bioremediation: fundamentals, challenges and future perspectives. BIORESOURCE TECHNOLOGY 2015; 196:677-684. [PMID: 26227572 DOI: 10.1016/j.biortech.2015.07.074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 06/04/2023]
Abstract
Bioremediation is envisaged as an important way to abate groundwater contamination, but the need for chemical addition and limited bioavailability of electron donors/acceptors or contaminants hamper its application. As a promising means to enhance such processes, electrochemical system has drawn considerable attention, as it offers distinct advantages in terms of environmental benignity, controllability and treatment efficiency. Meanwhile, there are also potential risks and considerable engineering challenges for its practical application. This review provides a first comprehensive introduction of this emerging technology, discusses its potential applications and current challenges, identifies the knowledge gaps, and outlooks the future opportunities to bring it to field application. The need for a better understanding on the microbiology under electrochemical stimulation and the future requirements on process monitoring, modeling and evaluation protocols and field investigations are highlighted.
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Affiliation(s)
- Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei 230026, China.
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137
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Huggins TM, Pietron JJ, Wang H, Ren ZJ, Biffinger JC. Graphitic biochar as a cathode electrocatalyst support for microbial fuel cells. BIORESOURCE TECHNOLOGY 2015; 195:147-153. [PMID: 26141670 DOI: 10.1016/j.biortech.2015.06.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/03/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
Graphitic biochar (BC) was generated using high temperature gasification and alkaline post-treatment (BCw) of wood-based biomass. The BCw was evaluated as a manganese oxide electrocatalytic support (MnO/BCw) and microbial fuel cell (MFC) air cathode. Nano-structured MnO2 crystals were successfully immobilized on biomass-based graphitic sheets and characterized using physical, chemical, and electrochemical analyses. Cyclic voltammetry of MnO/BCw/Nafion inks showed electrochemical features typical of β-MnO2 with a current density of 0.9 mA cm(-2). BC showed satisfactory maximum power densities of 146.7 mW m(-2) (BCw) and 187.8 W m(-2) (MnO/BCw), compared with Vulcan Carbon (VC) (156.8 mW m(-2)) and manganese oxide VC composites (MnO/VC) (606.1 mW m(-2)). These materials were also tested as oxygen reduction reaction (ORR) catalysts for single chamber MFCs inoculated with anaerobic sludge. Our results demonstrate that BC can serve as an effective, low cost, and scalable material for MFC application.
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Affiliation(s)
- Tyler M Huggins
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Boulder, CO 80309, USA; US Naval Research Laboratory, 4555 Overlook Ave. S.W., Code 6100, Washington, DC 20375, USA
| | - Jeremy J Pietron
- US Naval Research Laboratory, 4555 Overlook Ave. S.W., Code 6100, Washington, DC 20375, USA
| | - Heming Wang
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Boulder, CO 80309, USA
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Boulder, CO 80309, USA
| | - Justin C Biffinger
- US Naval Research Laboratory, 4555 Overlook Ave. S.W., Code 6100, Washington, DC 20375, USA.
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138
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Lu L, Xing D, Ren ZJ. Microbial community structure accompanied with electricity production in a constructed wetland plant microbial fuel cell. BIORESOURCE TECHNOLOGY 2015; 195:115-121. [PMID: 26066972 DOI: 10.1016/j.biortech.2015.05.098] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 05/29/2015] [Accepted: 05/30/2015] [Indexed: 06/04/2023]
Abstract
This study reveals the complex structure of bacterial and archaeal communities associated with a Canna indica plant microbial fuel cell (PMFC) and its electricity production. The PMFC produced a maximum current of 105 mA/m(2) by utilizing rhizodeposits as the sole electron donor without any external nutrient or buffer supplements, which demonstrates the feasibility of PMFCs in practical oligotrophic conditions with low solution conductivity. The microbial diversity was significantly higher in the PMFC than non-plant controls or sediment-only controls, and pyrosequencing and clone library reveal that rhizodeposits conversion to current were carried out by syntrophic interactions between fermentative bacteria (e.g., Anaerolineaceae) and electrochemically active bacteria (e.g., Geobacter). Denitrifying bacteria and acetotrophic methanogens play a minor role in organics degradation, but abundant hydrogenotrophic methanogens and thermophilic archaea are likely main electron donor competitors.
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Affiliation(s)
- Lu Lu
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Defeng Xing
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Zhiyong Jason Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
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139
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Yu Y, Wu Y, Cao B, Gao YG, Yan X. Adjustable bidirectional extracellular electron transfer between Comamonas testosteroni biofilms and electrode via distinct electron mediators. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.07.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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140
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Cruz Viggi C, Presta E, Bellagamba M, Kaciulis S, Balijepalli SK, Zanaroli G, Petrangeli Papini M, Rossetti S, Aulenta F. The "Oil-Spill Snorkel": an innovative bioelectrochemical approach to accelerate hydrocarbons biodegradation in marine sediments. Front Microbiol 2015; 6:881. [PMID: 26388841 PMCID: PMC4559663 DOI: 10.3389/fmicb.2015.00881] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/11/2015] [Indexed: 11/18/2022] Open
Abstract
This study presents the proof-of-concept of the “Oil-Spill Snorkel”: a novel bioelectrochemical approach to stimulate the oxidative biodegradation of petroleum hydrocarbons in sediments. The “Oil-Spill Snorkel” consists of a single conductive material (the snorkel) positioned suitably to create an electrochemical connection between the anoxic zone (the contaminated sediment) and the oxic zone (the overlying O2-containing water). The segment of the electrode buried within the sediment plays a role of anode, accepting electrons deriving from the oxidation of contaminants. Electrons flow through the snorkel up to the part exposed to the aerobic environment (the cathode), where they reduce oxygen to form water. Here we report the results of lab-scale microcosms setup with marine sediments and spiked with crude oil. Microcosms containing one or three graphite snorkels and controls (snorkel-free and autoclaved) were monitored for over 400 days. Collectively, the results of this study confirmed that the snorkels accelerate oxidative reactions taking place within the sediment, as documented by a significant 1.7-fold increase (p = 0.023, two-tailed t-test) in the cumulative oxygen uptake and 1.4-fold increase (p = 0.040) in the cumulative CO2 evolution in the microcosms containing three snorkels compared to snorkel-free controls. Accordingly, the initial rate of total petroleum hydrocarbons (TPH) degradation was also substantially enhanced. Indeed, while after 200 days of incubation a negligible degradation of TPH was noticed in snorkel-free controls, a significant reduction of 12 ± 1% (p = 0.004) and 21 ± 1% (p = 0.001) was observed in microcosms containing one and three snorkels, respectively. Although, the “Oil-Spill Snorkel” potentially represents a groundbreaking alternative to more expensive remediation options, further research efforts are needed to clarify factors and conditions affecting the snorkel-driven biodegradation processes and to identify suitable configurations for field applications.
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Affiliation(s)
| | - Enrica Presta
- Water Research Institute, National Research Council Rome, Italy
| | | | - Saulius Kaciulis
- Institute for the Study of Nanostructured Materials, National Research Council Rome, Italy
| | - Santosh K Balijepalli
- Institute for the Study of Nanostructured Materials, National Research Council Rome, Italy
| | - Giulio Zanaroli
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna Bologna, Italy
| | | | - Simona Rossetti
- Water Research Institute, National Research Council Rome, Italy
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141
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Chabert N, Amin Ali O, Achouak W. All ecosystems potentially host electrogenic bacteria. Bioelectrochemistry 2015; 106:88-96. [PMID: 26298511 DOI: 10.1016/j.bioelechem.2015.07.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 07/09/2015] [Accepted: 07/09/2015] [Indexed: 01/30/2023]
Abstract
Instead of requiring metal catalysts, MFCs utilize bacteria that oxidize organic matter and either transfer electrons to the anode or take electrons from the cathode. These devices are thus based on a wide microbial diversity that can convert a large array of organic matter components into sustainable and renewable energy. A wide variety of explored environments were found to host electrogenic bacteria, including extreme environments. In the present review, we describe how different ecosystems host electrogenic bacteria, as well as the physicochemical, electrochemical and biological parameters that control the currents from MFCs. We also report how using new molecular techniques allowed characterization of electrochemical biofilms and identification of potentially new electrogenic species. Finally we discuss these findings in the context of future research directions.
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Affiliation(s)
- Nicolas Chabert
- CEA, DSV, IBEB, Lab of Microbial Ecology of the Rhizosphere & Extreme Environment (LEMiRE), 13108 Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108 Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Oulfat Amin Ali
- CEA, DSV, IBEB, Lab of Microbial Ecology of the Rhizosphere & Extreme Environment (LEMiRE), 13108 Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108 Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Wafa Achouak
- CEA, DSV, IBEB, Lab of Microbial Ecology of the Rhizosphere & Extreme Environment (LEMiRE), 13108 Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108 Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France.
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142
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Lu L, Huang Z, Rau GH, Ren ZJ. Microbial Electrolytic Carbon Capture for Carbon Negative and Energy Positive Wastewater Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:8193-8201. [PMID: 26076212 DOI: 10.1021/acs.est.5b00875] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Energy and carbon neutral wastewater management is a major goal for environmental sustainability, but current progress has only reduced emission rather than using wastewater for active CO2 capture and utilization. We present here a new microbial electrolytic carbon capture (MECC) approach to potentially transform wastewater treatment to a carbon negative and energy positive process. Wastewater was used as an electrolyte for microbially assisted electrolytic production of H2 and OH(-) at the cathode and protons at the anode. The acidity dissolved silicate and liberated metal ions that balanced OH(-), producing metal hydroxide, which transformed CO2 in situ into (bi)carbonate. Results using both artificial and industrial wastewater show 80-93% of the CO2 was recovered from both CO2 derived from organic oxidation and additional CO2 injected into the headspace, making the process carbon-negative. High rates and yields of H2 were produced with 91-95% recovery efficiency, resulting in a net energy gain of 57-62 kJ/mol-CO2 captured. The pH remained stable without buffer addition and no toxic chlorine-containing compounds were detected. The produced (bi)carbonate alkalinity is valuable for wastewater treatment and long-term carbon storage in the ocean. Preliminary evaluation shows promising economic and environmental benefits for different industries.
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Affiliation(s)
- Lu Lu
- †Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Zhe Huang
- †Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Greg H Rau
- ‡Institute of Marine Sciences, University of California, Santa Cruz, California 95064, United States
| | - Zhiyong Jason Ren
- †Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
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143
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Complex Interactions Between the Macrophyte Acorus Calamus and Microbial Fuel Cells During Pyrene and Benzo[a]Pyrene Degradation in Sediments. Sci Rep 2015; 5:10709. [PMID: 26023748 PMCID: PMC4448661 DOI: 10.1038/srep10709] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 04/29/2015] [Indexed: 11/21/2022] Open
Abstract
This study investigated the interaction of the macrophyte Acorus calamus and sediment microbial fuel cells (SMFC) during the degradation of high molecular weight-polycyclic aromatic hydrocarbons (HMW-PAHs) in sediments. Over 367-days, the combination of macrophyte and SMFC led to an increase in pyrene and benzo[a]pyrene degradation rates by at least 70% compared to SMFC or macrophyte alone. While either the macrophyte or SMFC increased redox potential in sediments, redox potentials near the anode (approximately 6 cm depth) in the macrophyte-SMFC combination were markedly lower than that in the only macrophyte treatment. Moreover, rhizospheric bacterial communities in macrophyte-SMFC and macrophyte treatments were distinctly different. Aerobic genera (Vogesella, Pseudomonas, Flavobacterium and Rhizobium) and anaerobic genera (Longilinea, Bellilinea, Desulfobacca and Anaeromyxobacter) became dominant in the rhizosphere in macrophyte and macrophyte-SMFC treatments, respectively. In addition, the macrophyte-SMFC combination improved the numbers of not only aerobic but anaerobic PAHs degraders in sediments. So, the SMFC employment facilitated the formation of anoxic zones in sediments with oxygen loss and exudates from the roots. As a result, cooperation of anaerobic/aerobic microbial metabolism for accelerating HMW-PAHs removal occurred within sediments after combining macrophytes with SMFC.
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144
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Wang H, Luo H, Fallgren PH, Jin S, Ren ZJ. Bioelectrochemical system platform for sustainable environmental remediation and energy generation. Biotechnol Adv 2015; 33:317-34. [DOI: 10.1016/j.biotechadv.2015.04.003] [Citation(s) in RCA: 177] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 03/29/2015] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
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145
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Zhou YL, Jiang HL, Cai HY. To prevent the occurrence of black water agglomerate through delaying decomposition of cyanobacterial bloom biomass by sediment microbial fuel cell. JOURNAL OF HAZARDOUS MATERIALS 2015; 287:7-15. [PMID: 25621829 DOI: 10.1016/j.jhazmat.2015.01.036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 01/10/2015] [Accepted: 01/12/2015] [Indexed: 06/04/2023]
Abstract
Settlement of cyanobacterial bloom biomass (CBB) into sediments in eutrophic lakes often induced the occurrence of black water agglomerate and then water quality deterioration. This study investigated the effect of sediment microbial fuel cell (SMFC) on CBB removal in sediments and related water pollution. Sediment bulking and subsequent black water from decomposition of settled CBB happened without SMFC, but were not observed over 100-day experiments with SMFC employment. While CBB in sediments improved power production from SMFC, the removal efficiency of organic matters in CBB-amended sediments with SMFC was significantly lower than that without SMFC. Pyrosequencing analysis showed higher abundances of the fermentative Clostridium and acetoclastic methanogen in CBB-amended bulk sediments without SMFC than with SMFC at the end of experiments. Obviously, SMFC operation changed the microbial community in CBB-amended sediments, and delayed the CBB degradation against sediment bulking. Thus, SMFC could be potentially applied as pollution prevention in CBB-settled and sensitive zones in shallow lakes.
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Affiliation(s)
- Yan-Li Zhou
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China; Graduate University of Chinese Academy of Sciences, China
| | - He-Long Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China.
| | - Hai-Yuan Cai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
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146
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Goto Y, Yoshida N, Umeyama Y, Yamada T, Tero R, Hiraishi A. Enhancement of electricity production by graphene oxide in soil microbial fuel cells and plant microbial fuel cells. Front Bioeng Biotechnol 2015; 3:42. [PMID: 25883931 PMCID: PMC4381712 DOI: 10.3389/fbioe.2015.00042] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/16/2015] [Indexed: 11/13/2022] Open
Abstract
The effects of graphene oxide (GO) on electricity generation in soil microbial fuel cells (SMFCs) and plant microbial fuel cell (PMFCs) were investigated. GO at concentrations ranging from 0 to 1.9 g⋅kg(-1) was added to soil and reduced for 10 days under anaerobic incubation. All SMFCs (GO-SMFCs) utilizing the soils incubated with GO produced electricity at a greater rate and in higher quantities than the SMFCs which did not contain GO. In fed-batch operations, the overall average electricity generation in GO-SMFCs containing 1.0 g⋅kg(-1) of GO was 40 ± 19 mW⋅m(-2), which was significantly higher than the value of 6.6 ± 8.9 mW⋅m(-2) generated from GO-free SMFCs (p < 0.05). The increase in catalytic current at the oxidative potential was observed by cyclic voltammetry (CV) for GO-SMFC, with the CV curve suggesting the enhancement of electron transfer from oxidation of organic substances in the soil by the reduced form of GO. The GO-containing PMFC also displayed a greater generation of electricity compared to the PMFC with no added GO, with GO-PMFC producing 49 mW⋅m(-2) of electricity after 27 days of operation. Collectively, this study demonstrates that GO added to soil can be microbially reduced in soil, and facilitates electron transfer to the anode in both SMFCs and PMFCs.
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Affiliation(s)
- Yuko Goto
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Biomedical Science, College of Life and Health Science, Chubu University , Kasugai, Aichi , Japan
| | - Naoko Yoshida
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology , Nagoya, Aichi , Japan
| | - Yuto Umeyama
- Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Takeshi Yamada
- Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Ryugo Tero
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Akira Hiraishi
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
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147
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Cai Z, Li S, Zhang W, Ma J, Wang J, Cai J, Yang G. Effects of the novel pyrimidynyloxybenzoic herbicide ZJ0273 on enzyme activities, microorganisms and its degradation in Chinese soils. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:4425-33. [PMID: 25307859 DOI: 10.1007/s11356-014-3674-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/29/2014] [Indexed: 05/15/2023]
Abstract
Enzyme activity and microbial population in soils have important roles in keeping soil fertility. ZJ0273 is a novel pyrimidynyloxybenzoic-based herbicide, which was recently developed in China. The effect of ZJ0273 on soil enzyme activity and microbial population in two different soils was investigated in this study for the first time. The protease activity was significantly inhibited by ZJ0273 and this inhibiting effect gradually weakened after 60-day incubation. The results also showed that ZJ0273 had different stimulating effects on the activities of dehydrogenase, urease, and catalase. Dehydrogenase was consistently stimulated by all the applied concentrations of ZJ0273. The stimulating effect on urease weakened after 60-day incubation. Catalase activity was subject to variations during the period of the experiments. The results of microbial population showed that the number of bacteria and actinomycetes increased in ZJ0273-treated soil compared with the control after 20 days of incubation, while fungal number decreased after only 10 days of incubation in soils. DT50 (half-life value) and k (degradation rate constant) of ZJ0273 in S1 (marine-fluvigenic yellow loamy soil) and S2 (Huangshi soil) were found 69.31 and 49.50 days and 0.010 and 0.014 day(-1), respectively.
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Affiliation(s)
- Zhiqiang Cai
- Laboratory of Applied Microbiology, Changzhou University, Changzhou, 213164, China,
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148
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Zhang Y, Wang X, Li X, Cheng L, Wan L, Zhou Q. Horizontal arrangement of anodes of microbial fuel cells enhances remediation of petroleum hydrocarbon-contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:2335-2341. [PMID: 25189807 DOI: 10.1007/s11356-014-3539-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Accepted: 08/28/2014] [Indexed: 06/03/2023]
Abstract
With the aim of in situ bioremediation of soil contaminated by hydrocarbons, anodes arranged with two different ways (horizontal or vertical) were compared in microbial fuel cells (MFCs). Charge outputs as high as 833 and 762C were achieved in reactors with anodes horizontally arranged (HA) and vertically arranged (VA). Up to 12.5 % of the total petroleum hydrocarbon (TPH) was removed in HA after 135 days, which was 50.6 % higher than that in VA (8.3 %) and 95.3 % higher than that in the disconnected control (6.4 %). Hydrocarbon fingerprint analysis showed that the degradation rates of both alkanes and polycyclic aromatic hydrocarbons (PAHs) in HA were higher than those in VA. Lower mass transport resistance in the HA than that of the VA seems to result in more power and more TPH degradation. Soil pH was increased from 8.26 to 9.12 in HA and from 8.26 to 8.64 in VA, whereas the conductivity was decreased from 1.99 to 1.54 mS/cm in HA and from 1.99 to 1.46 mS/cm in VA accompanied with the removal of TPH. Considering both enhanced biodegradation of hydrocarbon and generation of charge in HA, the MFC with anodes horizontally arranged is a promising configuration for future applications.
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Affiliation(s)
- Yueyong Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China
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149
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Wang L, Wu Y, Zheng Y, Liu L, Zhao F. Efficient degradation of sulfamethoxazole and the response of microbial communities in microbial fuel cells. RSC Adv 2015. [DOI: 10.1039/c5ra08438e] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sulfamethoxazole (SMX) could be rapidly biodegraded in a microbial fuel cell reactor.
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Affiliation(s)
- Lu Wang
- Key Laboratory of Urban Pollutant Conversion
- Chinese Academy of Sciences Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen
- China
| | - Yicheng Wu
- Xiamen University of Technology
- Xiamen
- China
| | - Yue Zheng
- Key Laboratory of Urban Pollutant Conversion
- Chinese Academy of Sciences Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen
- China
| | - Lidan Liu
- Key Laboratory of Urban Pollutant Conversion
- Chinese Academy of Sciences Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen
- China
| | - Feng Zhao
- Key Laboratory of Urban Pollutant Conversion
- Chinese Academy of Sciences Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen
- China
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150
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Mei X, Guo C, Liu B, Tang Y, Xing D. Shaping of bacterial community structure in microbial fuel cells by different inocula. RSC Adv 2015. [DOI: 10.1039/c5ra16382j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Understanding how the community structure of anode biofilms is shaped is important for enhancing the performance of microbial fuel cells (MFCs).
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Affiliation(s)
- Xiaoxue Mei
- College of Life Science and Technology
- Harbin Normal University
- Harbin 150025
- China
| | - Changhong Guo
- College of Life Science and Technology
- Harbin Normal University
- Harbin 150025
- China
- State Key Lab of Urban Water Resource and Environment
| | - Bingfeng Liu
- State Key Lab of Urban Water Resource and Environment
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Yu Tang
- State Key Lab of Urban Water Resource and Environment
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Defeng Xing
- State Key Lab of Urban Water Resource and Environment
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin
- China
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