1
|
Dong B, Huan Z, Cai L, Liu L, Han M, Nie G, Zhao S, Liu G, Zhu Y. Biochar Applications for Efficient Removal of Energetic Compound Contaminants. CHEMOSPHERE 2024; 364:143135. [PMID: 39168380 DOI: 10.1016/j.chemosphere.2024.143135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 08/12/2024] [Accepted: 08/18/2024] [Indexed: 08/23/2024]
Abstract
Military activities and the production or disposal of ammunition often lead to soil contamination with energetic compounds (ECs) such as dinitrotoluene, trinitrotoluene, and hexogen, posing significant threats to human health and the ecosystem. Biochar has emerged as a cost-effective and widely available solution for remediating contaminated sites characterized by its capacity for pollutant removal through adsorption and conversion process, along with minimal secondary pollution. This paper provides a comprehensive review of relevant literature on biochar's efficacy in eliminating ECs, including an analysis of the underlying mechanisms. The discussion addresses challenges and opportunities associated with biochar application in ECs remediation, offering insights for future research directions. In summary, the use of biochar for ECs removal presents a promising and eco-friendly approach, facilitating the remediation of contaminated sites while promoting soil function and ecosystem recovery.
Collapse
Affiliation(s)
- Bin Dong
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Zhenglai Huan
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Lu Cai
- Technology Institute of Beijing Waterworks Group Co., Ltd., Beijing Engineering Research Center for Drinking Water Quality, Beijing 100012, China
| | - Lecheng Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Mengwei Han
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Guo Nie
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Sanping Zhao
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yongbing Zhu
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
| |
Collapse
|
2
|
Yan W, He X, Chen M, Qian B, Li M, Yan Y, Lin C, Mao Z. High arsenic pollution of the eutrophic Lake Taihu and its relationship with iron, manganese, and dissolved organic matter: High-resolution synchronous analysis. JOURNAL OF HAZARDOUS MATERIALS 2024; 467:133644. [PMID: 38330646 DOI: 10.1016/j.jhazmat.2024.133644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/12/2024] [Accepted: 01/26/2024] [Indexed: 02/10/2024]
Abstract
Arsenic (As) is a metalloid that can accumulate in eutrophic lakes and cause adverse health effects to people worldwide. However, the seasonal process and dynamic mechanism for As mobilization in eutrophic lake remains effectively unknown. Here we innovatively used the planar optodes (PO), high-resolution dialysis (HR-Peeper) combined with fluorescence excitation-emission matrix coupled with parallel factor (EEM-PARAFAC) analysis technologies. We synchronously investigate monthly O2, As, iron (Fe), manganese (Mn), and naturally occurring dissolved organic matter (DOM) changes in sediments of Lake Taihu at high resolution in field conditions. We find high As contamination from sediments with 61.88-327.07 μg m-2 d-1 release As fluxes during the algal bloom seasons from May to October 2021. Our results show that an increase in DOM, mainly for humic-like components, resulting in high electron transfer capacity (ETC), promoted the reductive dissolution of Fe and Mn oxides to release As. Partial least square-path modeling (PLS-PM) and random forest modeling analysis identified that Mn oxide reductive dissolution directly accelerated sediments As contamination, which is the crucial factor. Understanding crucial factor controlling As release is especially essential in areas of eutrophic lakes developing effective strategies to manage As-rich eutrophic lake sediments worldwide.
Collapse
Affiliation(s)
- Wenming Yan
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
| | - Xiangyu He
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
| | - Musong Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Bao Qian
- Bureau of Hydrology, Changjiang Water Resources Commission, Wuhan 430010, China
| | - Minjuan Li
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
| | - Yulin Yan
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
| | - Chen Lin
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhigang Mao
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| |
Collapse
|
3
|
Zhang P, Meng X, Liu A, Ma M, Shao Y, Sun H. Biochar-derived dissolved black carbon accelerates ferrihydrite microbial transformation and subsequent imidacloprid degradation. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130685. [PMID: 36584647 DOI: 10.1016/j.jhazmat.2022.130685] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/25/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
The effects of an electron shuttle (dissolved black carbon (DBC) derived from biochar) on the microbial reduction of ferrihydrite and subsequent imidacloprid (IMI) degradation were studied. The results showed that DBC addition enhanced the microbial reduction of Fe(III) in ferrihydrite and increased the quantity of Fe(II) released into the liquid phase. The electron transfer capacity of DBC was significantly influenced by the content of redox-active oxygen-containing functional groups (e.g., quinone, hydroquinone, and polyphenol groups), which was dependent on the pyrolysis temperature. The electrochemical characteristics of DBC resulted in enhanced electron transfer, which promoted Fe(III) reduction and mediated the microbial transformation of ferrihydrite. The microbial transformation of ferrihydrite resulted in the formation of secondary minerals such as siderite and vivianite. The IMI degradation efficiency was related to the Fe(III) reduction rate and the pyrolysis temperature used in DBC production, and the degradation pathways were nitrate reduction and imino hydrolysis induced by the Fe(II) generated from the reduction of Fe(III) in ferrihydrite. The results obtained in this study provide new data for understanding the multifunctional roles of biochar-derived DBC in the redox and transformation processes of iron minerals induced by iron-reducing bacteria, the related biogeochemical cycles of iron and the fate of pollutants.
Collapse
Affiliation(s)
- Peng Zhang
- Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Xingying Meng
- Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Aiju Liu
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China
| | - Mingming Ma
- Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yifei Shao
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China
| | - Hongwen Sun
- Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| |
Collapse
|
4
|
Dorner M, Lokesh S, Yang Y, Behrens S. Biochar-mediated abiotic and biotic degradation of halogenated organic contaminants - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158381. [PMID: 36055499 DOI: 10.1016/j.scitotenv.2022.158381] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Prevailing global increases in population, urbanization, and agricultural production are causing increased pressures on water resources, especially as the use of chemicals in agriculture, industry, and medicine provide new challenges for water treatment and reuse. Organohalogen compounds are persistent contaminants that often evade current wastewater treatment technologies, resulting in their accumulation in the environment and posing a serious threat to ecosystem health. Recent advances in understanding pyrogenic carbons as electron shuttling and storing materials have exposed their potential for enhancing the dehalogenation and overall degradation of organohalide contaminants in soil, sediment, surface water, and wastewater systems. Biochar is a porous carbonaceous material produced during the thermochemical decomposition of biomass feedstock in the presence of little or no oxygen (pyrolysis). Interest in biochar for application towards environmental remediation is largely based on its three distinct benefits: I) carbon sequestration to offset greenhouse gas emissions, II) adsorption of (in-) organic contaminants and nutrients, and III) a strong electron exchange capacity. Due to the innate complexity of biochar materials, several electron transfer mechanisms exist by which biochar may mediate contaminant degradation. These electron transfer pathways include electron-accepting and donating cycles through redox-active functional groups and direct electron transfer via conductive carbon matrices. These mechanisms are responsible for biochar's participation in multiple redox-driven biogeochemical transformations with proven consequences for effective organohalogen remediation. This literature review summarizes the current knowledge on the mechanisms and processes through which biochar can directly or indirectly mediate the transformation of organohalogen compounds under various environmental conditions. Perspectives and research directions for future application of biochars for targeted remediation strategies are also discussed.
Collapse
Affiliation(s)
- Mariah Dorner
- Department of Civil, Environmental, and Geo-Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Srinidhi Lokesh
- Department of Civil and Environmental Engineering, University of Nevada, Reno, NV, USA
| | - Yu Yang
- Department of Civil and Environmental Engineering, University of Nevada, Reno, NV, USA
| | - Sebastian Behrens
- Department of Civil, Environmental, and Geo-Engineering, University of Minnesota, Minneapolis, MN, USA; BioTechnology Institute, University of Minnesota, St. Paul, MN, USA.
| |
Collapse
|
5
|
Hu T, Pham DM, Kasai T, Katayama A. The Emergence of Extracellular Electron Mediating Functionality in Rice Straw-Artificial Soil Mixture during Humification. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15173. [PMID: 36429897 PMCID: PMC9691237 DOI: 10.3390/ijerph192215173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
This study aimed to elucidate the origin of extracellular electron mediating (EEM) functionality and redox-active center(s) in humic substances, where they are ubiquitously distributed. Here, we show the emergence of EEM functionality during the humification of rice straw in artificial soil (kaolin and sand) with a matric potential of -100 cm at 20 °C for one year. We used the dechlorination activity of an EEM material-dependent pentachlorophenol-dechlorinating anaerobic microbial consortium as an index of the EEM functionality. Although rice straw and its mixture with artificial soil did not initially have EEM functionality, it emerged after one month of humification and increased until six months after which the functionality was maintained for one year. Chemical and electrochemical characterizations demonstrated that the emergence and increase in EEM functionality were correlated with the degradation of rice straw, formation of quinone structures, a decrease in aromatic structures, an increase in nitrogenous and aliphatic structures, and specific electric capacitance during humification. The newly formed quinone structure was suggested as a potential redox-active center for the EEM functionality. These findings provide novel insights into the dynamic changes in EEM functionality during the humification of organic materials.
Collapse
Affiliation(s)
- Tingting Hu
- Graduate School of Engineering, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
| | - Duyen Minh Pham
- Institute of Materials and Systems for Sustainability, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
| | - Takuya Kasai
- Graduate School of Engineering, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
- Institute of Materials and Systems for Sustainability, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
| | - Arata Katayama
- Graduate School of Engineering, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
- Institute of Materials and Systems for Sustainability, Nagoya University, Tokai National Higher Education and Research System, Nagoya 464-8603, Japan
| |
Collapse
|
6
|
Sarma P, Sharma P, Gomila RM, Frontera A, Barcelo-Oliver M, Verma AK, Baruwa B, Bhattacharyya MK. Charge assisted hydrogen bonded assemblies and unconventional O···O dichalcogen bonding interactions in pyrazole-based isostructural Ni(II) and Mn(II) compounds involving anthraquinone disulfonate: Antiproliferative evaluation and theoretical studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131883] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
7
|
Niedźwiecka JB, McGee K, Finneran KT. Combined Biotic-Abiotic 2,4-Dinitroanisole Degradation in the Presence of Hexahydro-1,3,5-trinitro-1,3,5-triazine. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10638-10645. [PMID: 32687325 DOI: 10.1021/acs.est.0c02363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The Department of Defense has developed new explosive formulations in which traditionally used cyclic nitramines such as hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) have been updated with the insensitive munition (IM) 2,4-dinitroanisole (DNAN). Understanding combined degradation of both compounds at explosive-contaminated sites will allow remediation approaches that simultaneously target both contaminants. DNAN reduction in the presence of RDX was evaluated in abiotic experiments using substoichiometric, stoichiometric, and superstoichiometric concentrations of ferrous iron and anthrahydroquinone disulfonate within a pH range from 7.0 to 9.0. Biological degradation was investigated in resting cell suspensions of Geobacter metallireducens strain GS-15, a model Fe(III)-reducing Bacteria. Cells were amended into anoxic tubes buffered at pH 7.0, with initial 100 μM DNAN and 40-50 μM RDX. In both abiotic and biological experiments, the DNAN was reduced through the intermediate 2-methoxy-5-nitroaniline or 4-methoxy-3-nitroaniline to 2,4-diaminoanisole. In biological experiments, the RDX was reduced to form methylenedinitramine, formaldehyde (HCHO), and ammonium (NH4+). Cells were able to reduce both DNAN and RDX most readily in the presence of extracellular electron shuttles and/or Fe(III). DNAN degradation (abiotic and biotic) was faster than degradation of RDX, suggesting that the reduction of IMs will not be inhibited by cyclic nitramines, but degradation dynamics did change in mixtures when compared to singular compounds.
Collapse
Affiliation(s)
- Jolanta B Niedźwiecka
- Environmental Engineering and Earth Sciences, Clemson University, 312 Biosystems Research Complex (BRC) Suite 312, Clemson, South Carolina 29634, United States
- Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice 370 05, Czech Republic
| | - Kameryn McGee
- Environmental Engineering and Earth Sciences, Clemson University, 312 Biosystems Research Complex (BRC) Suite 312, Clemson, South Carolina 29634, United States
| | - Kevin T Finneran
- Environmental Engineering and Earth Sciences, Clemson University, 312 Biosystems Research Complex (BRC) Suite 312, Clemson, South Carolina 29634, United States
| |
Collapse
|
8
|
Liu G, Dong B, Zhou J, Li J, Jin R, Wang J. Facilitated bioreduction of nitrobenzene by lignite acting as low-cost and efficient electron shuttle. CHEMOSPHERE 2020; 248:125978. [PMID: 31995734 DOI: 10.1016/j.chemosphere.2020.125978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 10/26/2019] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
The searching for efficient and economical redox mediators to promote the treatment of wastewater containing recalcitrant organic compounds is greatly needed. In this study, the redox mediator activities of four different lignite samples to facilitate the bioreduction of nitrobenzene by Shewanella oneidensis MR-1 were tested for the first time. The initial nitrobenzene reduction rate was increased by 40.4%-90.3% in the presence of 50 mg/L of different lignite samples. Lignite collected from Xinjiang (XJL) having more oxygenated groups performed better in enhancing nitrobenzene bioreduction. The stimulating effects increased with the increase of lignite dosage (0-200 mg/L) and the decrease of lignite particle size (150-0.1 μm). However, the pristine XJL samples with assorted sizes of particles exhibited better stimulating effects than size-fractionated ones, implying that different-sized XJL particles might have synergetic effects on the bioreduction process. When humic acid or iron was removed from XJL, its promoting effects were decreased, demonstrating the crucial roles of both components in lignite-enhanced nitrobenzene bioreduction. Nitric acid treatment could form more oxygenated moieties on lignite surface, which played vital roles in promoting nitrobenzene bioreduction. The initial nitrobenzene bioreduction rate in the presence of HNO3-treated XJL was 80.8% higher than that obtained with pristine XJL. This study proposed an effective and readily available redox mediator that could be applied to promote the bioreduction of recalcitrant electrophilic pollutants.
Collapse
Affiliation(s)
- Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Bin Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
| | - Juanjuan Li
- Shanxi Academy for Environmental Planning, Taiyuan 030002, PR China
| | - Ruofei Jin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jing Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| |
Collapse
|
9
|
Gu L, Huang B, Han F, Pan B, Xu Z, Gu X, Xu H, Pan X, Dionysiou DD. Spontaneous changes in dissolved organic matter affect the bio-removal of steroid estrogens. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:616-624. [PMID: 31279207 DOI: 10.1016/j.scitotenv.2019.06.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/25/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
Microbial action is the main pathway removing steroid estrogens (SEs) from both aerobic and anaerobic natural waters. The rate is influenced by other active substances present, particularly dissolved organic matter (DOM). DOM in natural surface waters has unstable components which undergo spontaneous photochemical oxidation, biological oxidation, chemical oxidation changes. How these changes influence the biosorption and bio-removal of SEs was the subject of this research. Photo oxidation-induced DOM increased the proportion of the fluorescence in area V, but biological oxidation and chemical oxidation caused fluorescence area V to decrease. All three oxidation processes can reduce the proportions of molecular weight (MW) > 5 kg·mol-1 and increase the proportions of MW < 5 kg·mol-1. Both the electron transfer capacity decreased monotonically with photo oxidation and chemical oxidation ageing, but biological oxidation ageing increased them. 17β-estradiol (E2) was the SEs used in the experiments. In aerobic conditions, fresh river humic acids (RHA) and aged RHA had the stronger mediating effect on the rate of E2 bio-removal under aerobic conditions. Its greater effectiveness was probably related to its binding with E2. Binding, biosorption of E2 and bio-removal of E2 were strongly positively correlated with the elemental C (R > 0.8, p ≤ 0.01) and SUVA254 (R > 0.8, p ≤ 0.01) by correlation matrix. Besides, fresh river fulvic acids (RFA) and aged RFA had the bigger mediating effect on E2 bio-removal under anaerobic conditions, and this imply that changes in aged DOM affected by other electron transfer groups in an anaerobic water environment. In anaerobic conditions, biosorption of E2 and binding action could cluster together with SUVA254, p(v), and 1 kg·mol-1 < MW < 5 kg·mol-1 by redundancy analysis, and but bio-removal of E2 could be well polymerized with EAC, EDC, p(iv), and MW > 5 kg·mol-1.
Collapse
Affiliation(s)
- Lipeng Gu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Bin Huang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming 650500, Yunnan, China.
| | - Fengxia Han
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Bo Pan
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming 650500, Yunnan, China
| | - Zhixiang Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Xiao Gu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Huayu Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Xuejun Pan
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils, Kunming 650500, Yunnan, China
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA.
| |
Collapse
|
10
|
Zhao G, Li E, Li J, Liu F, Liu F, Xu M. Goethite Hinders Azo Dye Bioreduction by Blocking Terminal Reductive Sites on the Outer Membrane of Shewanella decolorationis S12. Front Microbiol 2019; 10:1452. [PMID: 31293561 PMCID: PMC6604703 DOI: 10.3389/fmicb.2019.01452] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 06/11/2019] [Indexed: 01/21/2023] Open
Abstract
Iron (hydr)oxides are the most ubiquitous Fe(III)-containing minerals in the near-surface environments and can regulate organic pollutant biotransformation by participating in bacterial extracellular electron transfer under anaerobic conditions. Mechanisms described so far are based on their redox properties in bacterial extracellular respiration. Here, we find that goethite, a typical iron (hydr)oxide, inhibits the bioreduction of different polar azo dyes by Shewanella decolorationis S12 not through electron competition, but by the contact of its surface Fe(III) with the bacterial outer surface. Through the combined results of attenuated total reflectance (ATR) Fourier transform infrared spectroscopy, two-dimensional correlation spectroscopy, and confocal laser scanning microscope, we found that the outer membrane proteins MtrC and OmcA of strain S12 are key binding sites for goethite surface. Meanwhile, they were identified as the important reductive terminals for azo dyes. These results suggest that goethite may block the terminal reductive sites of azo dyes on the bacterial outer membrane to inhibit their bioreduction. This discovered role of goethite in bioreduction provides new insight into the microbial transformation processes of organic pollutants in iron (hydr)oxide-containing environments.
Collapse
Affiliation(s)
- Gang Zhao
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Enze Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Feifei Liu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Fei Liu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| |
Collapse
|
11
|
Ray AE, Connon SA, Neal AL, Fujita Y, Cummings DE, Ingram JC, Magnuson TS. Metal Transformation by a Novel Pelosinus Isolate From a Subsurface Environment. Front Microbiol 2018; 9:1689. [PMID: 30174652 PMCID: PMC6107796 DOI: 10.3389/fmicb.2018.01689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 07/06/2018] [Indexed: 01/11/2023] Open
Abstract
The capability of microorganisms to alter metal speciation offers potential for the development of new strategies for immobilization of toxic metals in the environment. A metal-reducing microbe, "Pelosinus lilae" strain UFO1, was isolated under strictly anaerobic conditions from an Fe(III)-reducing enrichment established with uncontaminated soil from the Department of Energy Oak Ridge Field Research Center, Tennessee. "P. lilae" UFO1 is a rod-shaped, spore-forming, and Gram-variable anaerobe with a fermentative metabolism. It is capable of reducing the humic acid analog anthraquinone-2,6-disulfonate (AQDS) using a variety of fermentable substrates and H2. Reduction of Fe(III)-nitrilotriacetic acid occurred in the presence of lactate as carbon and electron donor. Ferrihydrite was not reduced in the absence of AQDS. Nearly complete reduction of 1, 3, and 5 ppm Cr(VI) occurred within 24 h in suspensions containing 108 cells mL-1 when provided with 10 mM lactate; when 1 mM AQDS was added, 3 and 5 ppm Cr(VI) were reduced to 0.1 ppm within 2 h. Strain UFO1 is a novel species within the bacterial genus Pelosinus, having 98.16% 16S rRNA gene sequence similarity with the most closely related described species, Pelosinus fermentans R7T. The G+C content of the genomic DNA was 38 mol%, and DNA-DNA hybridization of "P. lilae" UFO1 against P. fermentans R7T indicated an average 16.8% DNA-DNA similarity. The unique phylogenetic, physiologic, and metal-transforming characteristics of "P. lilae" UFO1 reveal it is a novel isolate of the described genus Pelosinus.
Collapse
Affiliation(s)
- Allison E. Ray
- Department of Biological Sciences, Idaho State University, Pocatello, ID, United States
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Stephanie A. Connon
- Department of Biological Sciences, Idaho State University, Pocatello, ID, United States
- California Institute of Technology, Pasadena, CA, United States
| | - Andrew L. Neal
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States
| | - Yoshiko Fujita
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - David E. Cummings
- Department of Biology, Point Loma Nazarene University, San Diego, CA, United States
| | - Jani C. Ingram
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Timothy S. Magnuson
- Department of Biological Sciences, Idaho State University, Pocatello, ID, United States
| |
Collapse
|
12
|
Khatiwada R, Olivares C, Abrell L, Root RA, Sierra-Alvarez R, Field JA, Chorover J. Oxidation of reduced daughter products from 2,4-dinitroanisole (DNAN) by Mn(IV) and Fe(III) oxides. CHEMOSPHERE 2018; 201:790-798. [PMID: 29550573 DOI: 10.1016/j.chemosphere.2018.03.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/21/2018] [Accepted: 03/03/2018] [Indexed: 06/08/2023]
Abstract
Abiotic transformation of anthropogenic compounds by redox-active metal oxides affects contaminant fate in soil. The capacity of birnessite and ferrihydrite to oxidize the insensitive munitions compound, 2,4-dinitroanisol (DNAN), and its amine-containing daughter products, 2-methoxy-5-nitro aniline (MENA) and 2,4-diaminoanisole (DAAN), was studied in stirred reactors at controlled pH (7.0). Aqueous suspensions were reacted at metal oxide solid to solution mass ratios (SSR) of 0.15, 1.5 and 15 g kg-1 and solutions were analyzed after 0-3 h by high performance liquid chromatography coupled with photodiode array or mass spectrometry detection. Results indicate that DNAN was resistant to oxidation by birnessite and ferrihydrite. Ferrihydrite did not oxidize MENA, but MENA was susceptible to rapid oxidation by birnessite, with nitrogen largely mineralized to nitrite. This is the first report on mineralization of nonphenolic aromatics and the release of mineralized N from aromatic amines following reaction with birnessite. DAAN was oxidized by both solids, but ca. ten times higher rate was observed with birnessite as compared to ferrihydrite at an SSR of 1.5 g kg-1. At 15 g kg-1 SSR, DAAN was removed from solution within 5 min of reaction with birnessite. CO2(g) evolution experiments indicate mineralization of 15 and 12% of the carbon associated with MENA and DAAN, respectively, under oxic conditions with birnessite at SSR of 15 g kg-1. The results taken as a whole indicate that initial reductive (bio)transformation products of DNAN are readily oxidized by birnessite. The oxidizability of the reduced DNAN products was increased with progressive (bio)reduction as reflected by impacts on the oxidation rate.
Collapse
Affiliation(s)
- Raju Khatiwada
- Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ, USA
| | - Christopher Olivares
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Leif Abrell
- Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ, USA; Arizona Laboratory for Emerging Contaminants, University of Arizona, Tucson, AZ, USA
| | - Robert A Root
- Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ, USA
| | - Reyes Sierra-Alvarez
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - James A Field
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Jon Chorover
- Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ, USA; Arizona Laboratory for Emerging Contaminants, University of Arizona, Tucson, AZ, USA.
| |
Collapse
|
13
|
Tang T, Yue Z, Wang J, Chen T, Qing C. Goethite promoted biodegradation of 2,4-dinitrophenol under nitrate reduction condition. JOURNAL OF HAZARDOUS MATERIALS 2018; 343:176-180. [PMID: 28950205 DOI: 10.1016/j.jhazmat.2017.09.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 08/18/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
Iron oxide may interact with other pollutants in the aquatic environments and further influence their toxicity, transport and fate. The current study was conducted to investigate the biodegradation of 2,4-dinitrophenol (2,4-DNP) in the presence of iron oxide of goethite under anoxic condition using nitrate as the electron acceptor. Experiment results showed that the degradation rate of 2,4-DNP was improved by goethite. High performance liquid chromatography-mass spectra analysis results showed that goethite promoted degradation and transformation of 2,4-diaminophenol and 2-amino-4-nitrophenol (2-nitro-4-aminophenol). Microbial community analysis results showed that the abundance of Actinobacteria, which have the potential ability to degrade PAHs, was increased when goethite was available. This might partially explain the higher degradation of 2,4-DNP. Furthermore, another bacterium of Desulfotomaculum reducens which could reduce soluble Fe(III) and nitrate was also increased. Results further confirmed that nanomaterials in the aquatic environment will influence the microbial community and further change the transformation process of toxic pollutants.
Collapse
Affiliation(s)
- Ting Tang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Zhengbo Yue
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; CAS Key Laboratory of Urban Pollutant Conversion, University of Science and Technology of China, China.
| | - Jin Wang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Tianhu Chen
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Chengsong Qing
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| |
Collapse
|
14
|
Wang L, Xu S, Pan B, Yang Y. Emerging investigator series: dual role of organic matter in the anaerobic degradation of triclosan. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2017; 19:499-506. [PMID: 28290573 DOI: 10.1039/c7em00003k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Triclosan (TCS), one of the most widely used antimicrobial agents, has been listed among the top 10 contaminants in US rivers. Environmental persistence, endocrine disruption effects, and the antibiotic resistance induction capacity of TCS attract interest in its environmental fate and degradation. Herein, we found that TCS can be anaerobically degraded at pH 9 by a metal-reducing bacterium, Shewanella putrefaciens CN32. The degradation was substantially facilitated by low-concentration (0-15 mg C per L) organic matter (OM) extracted from a peat soil, whereas TCS degradation was inhibited by further increased concentration (15-100 mg C per L) of OM. OM acted as both an electron shuttle and sorbent in regulating the degradation of TCS. The novel dual role of ubiquitous OM in the reaction of TCS governs the environmental degradation and persistence of TCS. Our study highlights the effects of OM on the reaction of emerging trace organic pollutants, with implications on their engineering treatment and environmental risk regulation.
Collapse
Affiliation(s)
- Lin Wang
- Department of Civil and Environmental Engineering, University of Nevada, Reno, NV 89557, USA.
| | | | | | | |
Collapse
|
15
|
Li H, Guo H, Pan B, Liao S, Zhang D, Yang X, Min C, Xing B. Catechol degradation on hematite/silica-gas interface as affected by gas composition and the formation of environmentally persistent free radicals. Sci Rep 2016; 6:24494. [PMID: 27079263 PMCID: PMC4832247 DOI: 10.1038/srep24494] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/30/2016] [Indexed: 01/26/2023] Open
Abstract
Environmentally persistent free radicals (EPFRs) formed on a solid particle surface have received increasing attention because of their toxic effects. However, organic chemical fate regulated by EPFRs has rarely been investigated, and this information may provide the missing link in understanding their environmental behavior. Previous studies have suggested that the reduction of transition metals is involved in EPFRs formation. We thus hypothesize that an oxidative environment may inhibit EPFRs formation in particle-gas interface, which will consequently release free radicals and accelerate organic chemical degradation. Our result indicates that a 1% hematite coating on a silica surface inhibited catechol degradation in N2, especially at low catechol loadings on solid particles (SCT). However, under an O2 environment, catechol degradation decreased when SCT was <1 μg/mg but increased when SCT was >1 μg/mg. Stable organic free radicals were observed in the N2 system with g factors in the 2.0035–2.0050 range, suggesting the dominance of oxygen-centered free radicals. The introduction of O2 into the catechol degradation system substantially decreased the free radical signals and decreased the Fe(II) content. These results were observed in both dark and light irradiation systems, indicating the ubiquitous presence of EPFRs in regulating the fate of organic chemicals.
Collapse
Affiliation(s)
- Hao Li
- Faculty of Environmental Science &Engineering, Kunming University of Science &Technology, Kunming, 650500, P. R. China
| | - Huiying Guo
- Faculty of Environmental Science &Engineering, Kunming University of Science &Technology, Kunming, 650500, P. R. China
| | - Bo Pan
- Faculty of Environmental Science &Engineering, Kunming University of Science &Technology, Kunming, 650500, P. R. China
| | - Shaohua Liao
- Faculty of Environmental Science &Engineering, Kunming University of Science &Technology, Kunming, 650500, P. R. China
| | - Di Zhang
- Faculty of Environmental Science &Engineering, Kunming University of Science &Technology, Kunming, 650500, P. R. China
| | - Xikun Yang
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, P. R. China
| | - Chungang Min
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, P. R. China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
| |
Collapse
|
16
|
Liu L, Liu G, Zhou J, Wang J, Jin R, Wang A. Improved bioreduction of nitrobenzene by black carbon/biochar derived from crop residues. RSC Adv 2016. [DOI: 10.1039/c6ra11671j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Black carbon and biochar can act as mediator to improve microbial reduction of nitrobenzene to aniline.
Collapse
Affiliation(s)
- Lecheng Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering
- Ministry of Education
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering
- Ministry of Education
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering
- Ministry of Education
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Jing Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering
- Ministry of Education
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Ruofei Jin
- Key Laboratory of Industrial Ecology and Environmental Engineering
- Ministry of Education
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Aijie Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| |
Collapse
|
17
|
Microbial community structure associated with treatment of azo dye in a start-up anaerobic sequenced batch reactor. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2015.03.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form. Appl Microbiol Biotechnol 2015; 99:9277-87. [PMID: 26175104 DOI: 10.1007/s00253-015-6798-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/22/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
Strain CICC 23870 capable of decolorization of various azo dyes under high saline conditions was isolated from saline-alkali soil. The oxygen-insensitive azoreductase in crude extracts exhibited a wide substrate adaptively in the presence of NADH as a cofactor. The decolorization process by free cells followed first-order kinetics, with a high Methyl Orange (MO) tolerance concentration up to 100 mg l(-1) estimated by Haldane model. The average decolorization rate of free cell system was 26.30 mg g(-1) h(-1) at initial MO concentration of 32.7 mg l(-1). However, the values for the systems of immobilized cells (4 mm) in alginate, alginate and nano-TiO2, and alginate and powered activated carbon (PAC) were 6.83, 4.64, and 11.34 mg g(-1) h(-1), respectively. The effective diffusion factors in the tree different matrices were calculated by diffusion-based mathematic model. The diffusion step controls the overall decolorization rate, and the effective diffusion coefficients varied with internal structure of the bead matrices. The diffusion coefficients were increased from 4.98 × 10(-9) to 2.25 × 10(-8) cm(2) s(-1) when PAC was added, but decreased to 6.62 × 10(-10) cm(2) s(-1) when nano-TiO2 was added. The immobilized matrices could be reused for at least three cycles but with a decreased decolorization rate, possibly due to the breakage of beads at the end of each cycle, which led to the loss of immobilized bacteria.
Collapse
|
19
|
Ziganshin AM, Ziganshina EE, Byrne J, Gerlach R, Struve E, Biktagirov T, Rodionov A, Kappler A. Fe(III) mineral reduction followed by partial dissolution and reactive oxygen species generation during 2,4,6-trinitrotoluene transformation by the aerobic yeast Yarrowia lipolytica. AMB Express 2015; 5:8. [PMID: 25852985 PMCID: PMC4314830 DOI: 10.1186/s13568-014-0094-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 12/29/2014] [Indexed: 11/23/2022] Open
Abstract
Understanding the factors that influence pollutant transformation in the presence of ferric (oxyhydr)oxides is crucial to the efficient application of different remediation strategies. In this study we determined the effect of goethite, hematite, magnetite and ferrihydrite on the transformation of 2,4,6-trinitrotoluene (TNT) by Yarrowia lipolytica AN-L15. The presence of ferric (oxyhydr)oxides led to a small decrease in the rate of TNT removal. In all cases, a significant release of NO2− from TNT and further NO2− oxidation to NO3− was observed. A fraction of the released NO2− was abiotically decomposed to NO and NO2, and then NO was likely oxidized abiotically to NO2 by O2. ESR analysis revealed the generation of superoxide in the culture medium; its further protonation at low pH resulted in the formation of hydroperoxyl radical. Presumably, a fraction of NO released during TNT degradation reacted with superoxide and formed peroxynitrite, which was further rearranged to NO3− at the acidic pH values observed in this study. A transformation and reduction of ferric (oxyhydr)oxides followed by partial dissolution (in the range of 7–86% of the initial Fe(III)) were observed in the presence of cells and TNT. Mössbauer spectroscopy showed some minor changes for goethite, magnetite and ferrihydrite samples during their incubation with Y. lipolytica and TNT. This study shows that i) reactive oxygen and nitrogen species generated during TNT transformation by Y. lipolytica participate in the abiotic conversion of TNT and ii) the presence of iron(III) minerals leads to a minor decrease in TNT transformation.
Collapse
|
20
|
Liu T, Jiang LL, He MF, Zhu Z, Wang DB, Song TS, Tan WM, Ouyang P, Xie J. Green synthesis of reduced graphene oxide by a GRAS strain Bacillus subtilis 168 with high biocompatibility to zebrafish embryos. RSC Adv 2015. [DOI: 10.1039/c5ra12304f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A low toxic and highly biocompatible bacterially reduced graphene oxide was prepared by a “Generally Recognized As Safe” strain Bacillus subtilis 168 mediated with Vitamin K3.
Collapse
Affiliation(s)
- Tingting Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| | - Ling-Ling Jiang
- College of Pharmaceutical Sciences
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Ming-Fang He
- College of Life Science and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Zhengang Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| | - De-bin Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| | - Tian-Shun Song
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| | - Wei-min Tan
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- National Engineering Research Center for Coatings
| | - Pingkai Ouyang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| | - Jingjing Xie
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
- College of Life Science and Pharmaceutical Engineering
| |
Collapse
|
21
|
Zhu W, Wang R, Huang T, Wu F. The characteristics and two-step reaction model of p-nitroacetophenone biodegradation mediated by Shewanella decolorationis S12 and electron shuttle in the presence/absence of goethite. ENVIRONMENTAL TECHNOLOGY 2014; 35:3116-3123. [PMID: 25244139 DOI: 10.1080/09593330.2014.931471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The current study mainly focused on the biodegradation process of p-nitroacetophenone (NP) in the presence and absence of goethite mediated by iron-reducing microbe (Shewanella decolorationis S12) and electron shuttle. The results showed that introduction of electron shuttle could obviously lead to an accumulation of biodegradation intermediate, especially in reaction systems containing high content of electron shuttle in the absence of goethite. Goethite could enhance the degree and rate of NP biodegradation. The microbial reductively generated Fe(II) played an active role in the biodegradation process. The relationship between the concentrations of biodegradation end product and the reaction times could be fitted by a consecutive reaction model with correlation coefficients (adjusted R(2)) in the range from 0.9241 to 0.9831 during the biodegradation stage from the beginning to about 250 h of incubation. However, during the subsequent biodegradation stages, in the presence and absence of goethite, transitions from the consecutive reaction model to zero-order reaction model and from the consecutive reaction model to exponential growth reaction model were observed, respectively. The newly proposed two-step reaction model will help understand the mechanism of the biodegradation process of nitroaromatic compounds and related pollutants.
Collapse
Affiliation(s)
- Weihuang Zhu
- a Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education , Xi'an University of Architecture and Technology , Xi'an 710055 , People's Republic of China
| | | | | | | |
Collapse
|
22
|
Bae S, Lee Y, Kwon MJ, Lee W. Riboflavin-mediated RDX transformation in the presence of Shewanella putrefaciens CN32 and lepidocrocite. JOURNAL OF HAZARDOUS MATERIALS 2014; 274:24-31. [PMID: 24762697 DOI: 10.1016/j.jhazmat.2014.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 04/03/2014] [Accepted: 04/05/2014] [Indexed: 06/03/2023]
Abstract
The potential of riboflavin for the reductive degradation of a cyclic nitramine, hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), was investigated in the presence of lepidocrocite and/or Shewanella putrefaciens CN32. RDX reduction by CN32 alone or CN32 with lepidocrocite was insignificant, while 110 μM RDX was completely reduced by CN32 with riboflavin in 78 h. The transformation products identified included nitroso metabolites, formaldehyde, and ammonium, indicating the ring cleavage of RDX. UV and visible light analysis revealed that riboflavin was microbially reduced by CN32, and that the reduced riboflavin was linked to the complete degradation of RDX. In the presence of both CN32 and lepidocrocite (γ-FeOOH), 100 μM-riboflavin increased the rate and extent of Fe(II) production as well as RDX reduction. An abiotic study also showed that Fe(II)-riboflavin complex, and Fe(II) adsorbed on lepidocrocite, reduced RDX by 48% and 21%, respectively. The findings in this study suggest that riboflavin-mediated RDX degradation pathways in subsurface environments are diverse and complex. However, riboflavin, either from bacteria or exogenous sources, can significantly increase RDX degradation. This will provide a sustainable clean-up option for explosive-contaminated subsurface environments.
Collapse
Affiliation(s)
- Sungjun Bae
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
| | - Yoonhwa Lee
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Man Jae Kwon
- Environmental Research Group, Korea Institute of Science and Technology, Saimdang-ro, Gangneung 210-340, Republic of Korea
| | - Woojin Lee
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| |
Collapse
|
23
|
Liu G, Zhang X, Zhou J, Wang A, Wang J, Jin R, Lv H. Quinone-mediated microbial synthesis of reduced graphene oxide with peroxidase-like activity. BIORESOURCE TECHNOLOGY 2013; 149:503-508. [PMID: 24140856 DOI: 10.1016/j.biortech.2013.09.115] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/20/2013] [Accepted: 09/24/2013] [Indexed: 06/02/2023]
Abstract
The effects of different quinones on graphene oxide (GO) reduction by Shewanella oneidensis MR-1 and the peroxidase activity of the resultant reduced graphene oxide (QRGO) were studied. The presence of 100 μM anthraquinone-2-sulfonate (AQS), anthraquinone-2,6-disulfonate and 5-hydroxy-1,4-naphthoquinone could lead to 1.6-2.8-fold increase in GO reduction rate, whereas anthraquinone-2-carboxylate slowed down the reduction. The stimulating effects of AQS increased with the increase of its concentration (10-100 μM). The mediated effects were proved by direct GO reduction by microbially reduced AQS. The mediated reduction of GO to QRGO was characterized by UV-vis, XRD, FTIR, Raman spectra, XPS, TEM and AFM, respectively. The as-prepared QRGO possessed peroxidase-like activity, which could catalyze the oxidation of 3,3'5,5'-tetramethylbenzidine by H2O2, and followed Michealis-Menten kinetics. A colorimetric sensor for quantitative determination of glucose based on the peroxidase activity of QRGO was developed over a range of 1-120 μM with a detection limit of 1 μM.
Collapse
Affiliation(s)
- Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | | | | | | | | | | | | |
Collapse
|
24
|
Braunschweig J, Bosch J, Meckenstock RU. Iron oxide nanoparticles in geomicrobiology: from biogeochemistry to bioremediation. N Biotechnol 2013; 30:793-802. [DOI: 10.1016/j.nbt.2013.03.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 02/11/2013] [Accepted: 03/23/2013] [Indexed: 10/27/2022]
|
25
|
Tao L, Zhu Z, Li F. Fe(II)/Cu(II) interaction on α-FeOOH, kaolin and TiO2 for interfacial reactions of 2-nitrophenol reductive transformation. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.02.057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
26
|
Accelerated removal of Sudan dye by Shewanella oneidensis MR-1 in the presence of quinones and humic acids. World J Microbiol Biotechnol 2013; 29:1723-30. [DOI: 10.1007/s11274-013-1336-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 03/24/2013] [Indexed: 01/24/2023]
|
27
|
Khilyas IV, Ziganshin AM, Pannier AJ, Gerlach R. Effect of ferrihydrite on 2,4,6-trinitrotoluene biotransformation by an aerobic yeast. Biodegradation 2012; 24:631-44. [DOI: 10.1007/s10532-012-9611-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 11/27/2012] [Indexed: 10/27/2022]
|
28
|
Hexavalent chromium reduction by Cellulomonas sp. strain ES6: the influence of carbon source, iron minerals, and electron shuttling compounds. Biodegradation 2012; 24:437-50. [DOI: 10.1007/s10532-012-9600-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 10/22/2012] [Indexed: 10/27/2022]
|
29
|
Bernstein A, Ronen Z. Biodegradation of the Explosives TNT, RDX and HMX. ENVIRONMENTAL SCIENCE AND ENGINEERING 2012. [DOI: 10.1007/978-3-642-23789-8_5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
30
|
Ye X, Morgenroth E, Zhang X, Finneran KT. Anthrahydroquinone-2,6,-disulfonate (AH2QDS) increases hydrogen molar yield and xylose utilization in growing cultures of Clostridium beijerinckii. Appl Microbiol Biotechnol 2011; 92:855-64. [DOI: 10.1007/s00253-011-3571-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 08/15/2011] [Accepted: 09/06/2011] [Indexed: 10/17/2022]
|
31
|
Kwon MJ, O'Loughlin EJ, Antonopoulos DA, Finneran KT. Geochemical and microbiological processes contributing to the transformation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in contaminated aquifer material. CHEMOSPHERE 2011; 84:1223-1230. [PMID: 21664641 DOI: 10.1016/j.chemosphere.2011.05.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 05/12/2011] [Accepted: 05/13/2011] [Indexed: 05/30/2023]
Abstract
Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) is a potential human carcinogen, and its contamination of subsurface environments is a significant threat to public health. This study investigated abiotic and biological degradation of RDX in contaminated aquifer material. Anoxic batch systems were started with and without pre-aeration of aquifer material to distinguish initial biological RDX reduction from abiotic RDX reduction. Aerating the sediment eliminated chemical reductants in the native aquifer sediment, primarily Fe(II) sorbed to mineral surfaces. RDX (50 μM) was completely reduced and transformed to ring cleavage products when excess concentrations (2mM) of acetate or lactate were provided as the electron donor for aerated sediment. RDX was reduced concurrently with Fe(III) when acetate was provided, while RDX, Fe(III), and sulfate were reduced simultaneously with lactate amendment. Betaproteobacteria were the dominant microorganisms associated with RDX and Fe(III)/sulfate reduction. In particular, Rhodoferax spp. increased from 21% to 35% and from 28% to 60% after biostimulation by acetate and lactate, respectively. Rarefaction analyses demonstrated that microbial diversity decreased in electron-donor-amended systems with active RDX degradation. Although significant amounts of Fe(III) and/or sulfate were reduced after biostimulation, solid-phase reactive minerals such as magnetite or ferrous sulfides were not observed, suggesting that RDX reduction in the aquifer sediment is due to Fe(II) adsorbed to solid surfaces as a result of Fe(III)-reducing microbial activity. These results suggest that both biotic and abiotic processes play an important role in RDX reduction under in situ conditions.
Collapse
Affiliation(s)
- Man Jae Kwon
- Biosciences Division, Argonne National Laboratory, Argonne, IL, United States.
| | | | | | | |
Collapse
|
32
|
Sivaswamy V, Boyanov MI, Peyton BM, Viamajala S, Gerlach R, Apel WA, Sani RK, Dohnalkova A, Kemner KM, Borch T. Multiple mechanisms of uranium immobilization by Cellulomonas sp. strain ES6. Biotechnol Bioeng 2011; 108:264-76. [PMID: 20872821 DOI: 10.1002/bit.22956] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Removal of hexavalent uranium (U(VI)) from aqueous solution was studied using a Gram-positive facultative anaerobe, Cellulomonas sp. strain ES6, under anaerobic, non-growth conditions in bicarbonate and PIPES buffers. Inorganic phosphate was released by cells during the experiments providing ligands for formation of insoluble U(VI) phosphates. Phosphate release was most probably the result of anaerobic hydrolysis of intracellular polyphosphates accumulated by ES6 during aerobic growth. Microbial reduction of U(VI) to U(IV) was also observed. However, the relative magnitudes of U(VI) removal by abiotic (phosphate-based) precipitation and microbial reduction depended on the buffer chemistry. In bicarbonate buffer, X-ray absorption fine structure (XAFS) spectroscopy showed that U in the solid phase was present primarily as a non-uraninite U(IV) phase, whereas in PIPES buffer, U precipitates consisted primarily of U(VI)-phosphate. In both bicarbonate and PIPES buffer, net release of cellular phosphate was measured to be lower than that observed in U-free controls suggesting simultaneous precipitation of U and PO₄³⁻. In PIPES, U(VI) phosphates formed a significant portion of U precipitates and mass balance estimates of U and P along with XAFS data corroborate this hypothesis. High-resolution transmission electron microscopy (HR-TEM) and energy dispersive X-ray spectroscopy (EDS) of samples from PIPES treatments indeed showed both extracellular and intracellular accumulation of U solids with nanometer sized lath structures that contained U and P. In bicarbonate, however, more phosphate was removed than required to stoichiometrically balance the U(VI)/U(IV) fraction determined by XAFS, suggesting that U(IV) precipitated together with phosphate in this system. When anthraquinone-2,6-disulfonate (AQDS), a known electron shuttle, was added to the experimental reactors, the dominant removal mechanism in both buffers was reduction to a non-uraninite U(IV) phase. Uranium immobilization by abiotic precipitation or microbial reduction has been extensively reported; however, the present work suggests that strain ES6 can remove U(VI) from solution simultaneously through precipitation with phosphate ligands and microbial reduction, depending on the environmental conditions. Cellulomonadaceae are environmentally relevant subsurface bacteria and here, for the first time, the presence of multiple U immobilization mechanisms within one organism is reported using Cellulomonas sp. strain ES6.
Collapse
Affiliation(s)
- Vaideeswaran Sivaswamy
- Center for Multiphase Environmental Research, Department of Chemical Engineering, Washington State University, Pullman, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Blotevogel J, Mayeno AN, Sale TC, Borch T. Prediction of contaminant persistence in aqueous phase: a quantum chemical approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:2236-2242. [PMID: 21332222 DOI: 10.1021/es1028662] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
At contaminated field sites where active remediation measures are not feasible, monitored natural attenuation is sometimes the only alternative for surface water or groundwater decontamination. However, due to slow degradation rates of some contaminants under natural conditions, attenuation processes and their performance assessment can take several years to decades to complete. Here, we apply quantum chemical calculations to predict contaminant persistence in the aqueous phase. For the test compound hexamethylphosphoramide (HMPA), P-N bond hydrolysis is the only thermodynamically favorable reaction that may lead to its degradation under reducing conditions. Through calculation of aqueous Gibbs free energies of activation for all potential reaction mechanisms, it is predicted that HMPA hydrolyzes via an acid-catalyzed mechanism at pH < 8.2, and an uncatalyzed mechanism at pH 8.2-8.5. The estimated half-lives of thousands to hundreds of thousands of years over the groundwater-typical pH range of 6.0 to 8.5 indicate that HMPA will be persistent in the absence of suitable oxidants. At pH 0, where the hydrolysis reaction is rapid enough to enable measurement, the experimentally determined rate constant and half-life are in excellent agreement with the predicted values. Since the quantum chemical methodology described herein can be applied to virtually any contaminant or reaction of interest, it is especially valuable for the prediction of persistence when slow reaction rates impede experimental investigations and appropriate QSARs are unavailable.
Collapse
Affiliation(s)
- Jens Blotevogel
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, Colorado 80523, United States
| | | | | | | |
Collapse
|
34
|
Gerlach R, Field EK, Viamajala S, Peyton BM, Apel WA, Cunningham AB. Influence of carbon sources and electron shuttles on ferric iron reduction by Cellulomonas sp. strain ES6. Biodegradation 2011; 22:983-95. [PMID: 21318474 DOI: 10.1007/s10532-011-9457-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Accepted: 01/31/2011] [Indexed: 11/26/2022]
Abstract
Microbially reduced iron minerals can reductively transform a variety of contaminants including heavy metals, radionuclides, chlorinated aliphatics, and nitroaromatics. A number of Cellulomonas spp. strains, including strain ES6, isolated from aquifer samples obtained at the U.S. Department of Energy's Hanford site in Washington, have been shown to be capable of reducing Cr(VI), TNT, natural organic matter, and soluble ferric iron [Fe(III)]. This research investigated the ability of Cellulomonas sp. strain ES6 to reduce solid phase and dissolved Fe(III) utilizing different carbon sources and various electron shuttling compounds. Results suggest that Fe(III) reduction by and growth of strain ES6 was dependent upon the type of electron donor, the form of iron present, and the presence of synthetic or natural organic matter, such as anthraquinone-2,6-disulfonate (AQDS) or humic substances. This research suggests that Cellulomonas sp. strain ES6 could play a significant role in metal reduction in the Hanford subsurface and that the choice of carbon source and organic matter addition can allow for independent control of growth and iron reduction activity.
Collapse
Affiliation(s)
- Robin Gerlach
- Center for Biofilm Engineering, Montana State University, Bozeman, MT 59717, USA.
| | | | | | | | | | | |
Collapse
|
35
|
Alvarez LH, Perez-Cruz MA, Rangel-Mendez JR, Cervantes FJ. Immobilized redox mediator on metal-oxides nanoparticles and its catalytic effect in a reductive decolorization process. JOURNAL OF HAZARDOUS MATERIALS 2010; 184:268-272. [PMID: 20813453 DOI: 10.1016/j.jhazmat.2010.08.032] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 08/03/2010] [Accepted: 08/09/2010] [Indexed: 05/29/2023]
Abstract
Different metal-oxides nanoparticles (MONP) including α-Al(2)O(3), ZnO and Al(OH)(3), were utilized as adsorbents to immobilize anthraquinone-2,6-disulfonate (AQDS). Immobilized AQDS was subsequently tested as a solid-phase redox mediator (RMs) for the reductive decolorization of the azo dye, reactive red 2 (RR2), by anaerobic sludge. The highest adsorption capacity of AQDS was achieved on Al(OH)(3) nanoparticles, which was ∼0.16 mmol g(-1) at pH 4. Immobilized AQDS increased up to 7.5-fold the rate of decolorization of RR2 by anaerobic sludge as compared with sludge incubations lacking AQDS. Sterile controls including immobilized AQDS did not show significant (<3.5%) RR2 decolorization, suggesting that physical-chemical processes (e.g. adsorption or chemical reduction) were not responsible for the enhanced decolorization achieved. Immobilization of AQDS on MONP was very stable under the applied experimental conditions and spectrophotometric screening did not detect any detachment of AQDS during the reductive decolorization of RR2, confirming that immobilized AQDS served as an effective RMs. The present study constitutes the first demonstration that immobilized quinones on MONP can serve as effective RMs in the reductive decolorization of an azo dye. The immobilizing technique developed could be applied in anaerobic wastewater treatment systems to accelerate the redox biotransformation of recalcitrant pollutants.
Collapse
Affiliation(s)
- L H Alvarez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Col. Lomas 4a. Sección, 78216 San Luis Potosí, SLP, Mexico
| | - M A Perez-Cruz
- Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, 72571 Puebla, Mexico
| | - J R Rangel-Mendez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Col. Lomas 4a. Sección, 78216 San Luis Potosí, SLP, Mexico
| | - F J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), Camino a la Presa San José 2055, Col. Lomas 4a. Sección, 78216 San Luis Potosí, SLP, Mexico.
| |
Collapse
|
36
|
Electron shuttle-stimulated RDX mineralization and biological production of 4-nitro-2,4-diazabutanal (NDAB) in RDX-contaminated aquifer material. Biodegradation 2010; 21:923-37. [DOI: 10.1007/s10532-010-9352-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
|
37
|
Cervantes FJ, Garcia-Espinosa A, Moreno-Reynosa MA, Rangel-Mendez JR. Immobilized redox mediators on anion exchange resins and their role on the reductive decolorization of azo dyes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:1747-53. [PMID: 20136089 DOI: 10.1021/es9027919] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Quinoid redox mediators (RM), including 1,2-naphthoquinone-4-sulfonate (NQS) and anthraquinone-2,6-disulfonate (AQDS), were adsorbed on anion exchange resins (AER) in order to explore their catalytic effects on the reductive decolorization of azo dyes by anaerobic granular sludge. Immobilized quinones preserved their catalytic properties once adsorbed on the surface of AER. Addition of different concentrations of immobilized quinones to sludge incubations increased up to 8.8-fold the rate of decolorization of azo dyes compared to controls lacking quinones. The catalytic effects of immobilized quinones also resulted in a greater extent of decolorization in quinone-amended incubations compared to controls lacking external RM. Spectrophotometric screening did not show any detachment of either AQDS or NQS during decolorization assays confirming that the enhanced decolorization accomplished was exclusively attributed to quinones immobilized on AER. Sterile controls including the maximum concentration of immobilized quinones supplied (4.8 mM) did not show any removal of azo dyes suggesting that physical-chemical processes, such as adsorption or chemical reduction, were not responsible for the enhanced decolorization reached. To our knowledge, this is the first study demonstrating the catalytic contribution of RM immobilized on AER on the reductive (bio)transformation of azo dyes.
Collapse
Affiliation(s)
- Francisco J Cervantes
- Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica, Camino a la Presa San Jose 2055, Col. Lomas 4a. Seccion, San Luis Potosi, SLP, 78216 Mexico.
| | | | | | | |
Collapse
|
38
|
Luan F, Burgos WD, Xie L, Zhou Q. Bioreduction of nitrobenzene, natural organic matter, and hematite by Shewanella putrefaciens CN32. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:184-190. [PMID: 19957913 DOI: 10.1021/es901585z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We examined the reduction of nitrobenzene by Shewanella putrefaciens CN32 in the presence of natural organic matter (NOM) and hematite. Bioreduction experiments were conducted with combinations and varied concentrations of nitrobenzene, soil humic acid, Georgetown NOM, hematite, and CN32. Abiotic experiments were conducted to quantify nitrobenzene reduction by biogenic Fe(II) and by bioreduced NOMs. We show that S. putrefaciens CN32 can directly reduce nitrobenzene. Both NOMs enhanced nitrobenzene reduction and the degree of enhancement depended on properties of the NOMs (aromaticity, organic radical content). Hematite enhanced nitrobenzene reduction by indirect reaction with biogenic-Fe(II), however, enhancement was dependent on the availability of excess electron donor. Under electron donor-limiting conditions, reducing equivalents diverted to hematite were not all transferred to nitrobenzene. In systems that contained both NOM and hematite we conclude that NOM-mediated reduction of nitrobenzene was more important than Fe(II)-mediated reduction.
Collapse
Affiliation(s)
- Fubo Luan
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | | | | | | |
Collapse
|
39
|
Borch T, Kretzschmar R, Kappler A, Cappellen PV, Ginder-Vogel M, Voegelin A, Campbell K. Biogeochemical redox processes and their impact on contaminant dynamics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:15-23. [PMID: 20000681 DOI: 10.1021/es9026248] [Citation(s) in RCA: 605] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Life and element cycling on Earth is directly related to electron transfer (or redox) reactions. An understanding of biogeochemical redox processes is crucial for predicting and protecting environmental health and can provide new opportunities for engineered remediation strategies. Energy can be released and stored by means of redox reactions via the oxidation of labile organic carbon or inorganic compounds (electron donors) by microorganisms coupled to the reduction of electron acceptors including humic substances, iron-bearing minerals, transition metals, metalloids, and actinides. Environmental redox processes play key roles in the formation and dissolution of mineral phases. Redox cycling of naturally occurring trace elements and their host minerals often controls the release or sequestration of inorganic contaminants. Redox processes control the chemical speciation, bioavailability, toxicity, and mobility of many major and trace elements including Fe, Mn, C, P, N, S, Cr, Cu, Co, As, Sb, Se, Hg, Tc, and U. Redox-active humic substances and mineral surfaces can catalyze the redox transformation and degradation of organic contaminants. In this review article, we highlight recent advances in our understanding of biogeochemical redox processes and their impact on contaminant fate and transport, including future research needs.
Collapse
Affiliation(s)
- Thomas Borch
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, Colorado, USA.
| | | | | | | | | | | | | |
Collapse
|
40
|
Amstaetter K, Borch T, Larese-Casanova P, Kappler A. Redox transformation of arsenic by Fe(II)-activated goethite (alpha-FeOOH). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:102-108. [PMID: 20039739 DOI: 10.1021/es901274s] [Citation(s) in RCA: 148] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The redox state and speciation of the metalloid arsenic (As) determine its environmental fate and toxicity. Knowledge about biogeochemical processes influencing arsenic redox state is therefore necessary to understand and predict its environmental behavior. Here we quantified arsenic redox changes by pH-neutral goethite [alpha-Fe(III)OOH] mineral suspensions amended with Fe(II) using wet-chemical and synchrotron X-ray absorption (XANES) analysis. Goethite itself did not oxidize As(III) and, in contrast to thermodynamic predictions, Fe(II)-goethite systems did not reduce As(V). However, we observed rapid oxidation of As(III) to As(V) in Fe(II)-goethite systems. Mössbauer spectroscopy showed initial formation of (57)Fe-goethite after (57)Fe(II) addition plus a so far unidentified additional Fe(II) phase. No other Fe(III) phase could be detected by Mössbauer, EXAFS, SEM, XRD, or HR-TEM. This suggests that reactive Fe(III) species form as an intermediate Fe(III) phase upon Fe(II) addition and electron transfer into bulk goethite but before crystallization of the newly formed Fe(III) as goethite. In summary this study indicates that in the simultaneous presence of Fe(III) oxyhydroxides and Fe(II), as commonly observed in environments inhabited by iron-reducing microorganisms, As(III) oxidation can occur. This potentially explains the presence of As(V) in reduced groundwater aquifers.
Collapse
Affiliation(s)
- Katja Amstaetter
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Germany
| | | | | | | |
Collapse
|
41
|
Van der Zee FP, Cervantes FJ. Impact and application of electron shuttles on the redox (bio)transformation of contaminants: a review. Biotechnol Adv 2009; 27:256-77. [PMID: 19500549 DOI: 10.1016/j.biotechadv.2009.01.004] [Citation(s) in RCA: 331] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 01/06/2009] [Accepted: 01/09/2009] [Indexed: 10/21/2022]
Abstract
During the last two decades, extensive research has explored the catalytic effects of different organic molecules with redox mediating properties on the anaerobic (bio)transformation of a wide variety of organic and inorganic compounds. The accumulated evidence points at a major role of electron shuttles in the redox conversion of several distinct contaminants, both by chemical and biological mechanisms. Many microorganisms are capable of reducing redox mediators linked to the anaerobic oxidation of organic and inorganic substrates. Electron shuttles can also be chemically reduced by electron donors commonly found in anaerobic environments (e.g. sulfide and ferrous iron). Reduced electron shuttles can transfer electrons to several distinct electron-withdrawing compounds, such as azo dyes, polyhalogenated compounds, nitroaromatics and oxidized metalloids, among others. Moreover, reduced molecules with redox properties can support the microbial reduction of electron acceptors, such as nitrate, arsenate and perchlorate. The aim of this review paper is to summarize the results of reductive (bio)transformation processes catalyzed by electron shuttles and to indicate which aspects should be further investigated to enhance the applicability of redox mediators on the (bio)transformation of contaminants.
Collapse
Affiliation(s)
- Frank P Van der Zee
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | | |
Collapse
|
42
|
Viamajala S, Peyton BM, Gerlach R, Sivaswamy V, Apel WA, Petersen JN. Permeable reactive biobarriers for in situ Cr(VI) reduction: Bench scale tests usingCellulomonassp. strain ES6. Biotechnol Bioeng 2008; 101:1150-62. [DOI: 10.1002/bit.22020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
43
|
Huang L, Angelidaki I. Effect of humic acids on electricity generation integrated with xylose degradation in microbial fuel cells. Biotechnol Bioeng 2008; 100:413-22. [PMID: 18306421 DOI: 10.1002/bit.21786] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Pentose and humic acids (HA) are the main components of hydrolysates, the liquid fraction produced during thermohydrolysis of lignocellulosic material. Electricity generation integrated with xylose (typical pentose) degradation as well as the effect of HA on electricity production in microbial fuel cells (MFCs) was examined. Without HA addition the maximum power density increased from 39.5 mW/m(2) to 83 mW/m(2) when initial xylose concentrations increased from 1.5 to 30 mM, while coulombic efficiency ranged from 13.5% to 52.4% for xylose concentrations of 15 and 0.5 mM, respectively. Compared to controls where HAs were not added, addition of commercial HA resulted in increase of power density and coulombic efficiency, which ranged from 7.5% to 67.4% and 24% to 92.6%, respectively. Digested manure wastewater (DMW) was tested as potential mediator for power generation due to its content of natural HA, and although it could produce higher coulombic efficiency namely 32.2% than the control of 18.3%, showed lower power density which was approx. 57 mW/m(2) in comparison to power density of the control which was 69 mW/m(2). Presence of commercial HA or DMW in the anode chamber resulted in faster xylose degradation and formation of more oxidized products (acetate and formate) as well as less reduced products (lactate and ethanol) compared to the controls. The reduced power generation in the presence of DMW was attributed to the presence of bacterial inhibitors such as phenolic compounds. Therefore, new feedstocks for MFCs, containing both mediators and substrates, such as lignocellulose hydrolysates should be considered for their applicability in MFCs.
Collapse
Affiliation(s)
- Liping Huang
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | | |
Collapse
|
44
|
Kubota A, Maeda T, Nagafuchi N, Kadokami K, Ogawa HI. TNT biodegradation and production of dihydroxylamino-nitrotoluene by aerobic TNT degrader Pseudomonas sp. strain TM15 in an anoxic environment. Biodegradation 2008; 19:795-805. [PMID: 18299804 DOI: 10.1007/s10532-008-9182-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2007] [Accepted: 02/12/2008] [Indexed: 11/26/2022]
Abstract
Anaerobic bacteria have been used to produce 2,4-dihydroxylamino-nitrotoluene (2,4DHANT), a reductive metabolite of 2,4,6-trinitrotoluene (TNT). Here, an aerobic TNT biodegrader Pseudomonas sp. strain TM15 produced 2,4DHANT as evidenced by the molecular ion with m/z of 199 identified from LC-TOFMS analyses. TNT biodegradation with a high cell concentration (10(9) cells/ml) led to a significant accumulation of 2,4DHANT in the culture medium, as well as hydroxylamino-dinitrotoluenes (HADNTs), although these products were not accumulated when a low cell concentration was used; also, the accumulation of diamino-nitrotoluene and of an unidentified metabolite were observed in the culture medium with the high cell concentration (10(10) cells/ml). 2,4DHANT overproduction was a function of the aeration speed since cultures with low aeration speeds (30 rpm) had a 19-fold higher DHANT productivity than those aerated with high speeds (180 rpm); this indicates that molecular oxygen was related to the formation of 2,4DHANT. The quantification of dissolved oxygen (DO) in the media demonstrated that the productivity of 2,4DHANT was increased at low DO values. Moreover, supplying oxygen to the culture media produced a remarkable decrease of 2,4DHANT accumulation; these results clearly indicate that high 2,4DHANT production was a consequence of the oxygen deficit in the culture medium. This finding is useful for understanding the TNT biodegradation (bioremediation technology) in an anoxic environment.
Collapse
Affiliation(s)
- Akira Kubota
- Department of Biological Functions and Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
| | | | | | | | | |
Collapse
|
45
|
Kwon MJ, Finneran KT. Biotransformation products and mineralization potential for hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in abiotic versus biological degradation pathways with anthraquinone-2,6-disulfonate (AQDS) and Geobacter metallireducens. Biodegradation 2008; 19:705-15. [PMID: 18239998 DOI: 10.1007/s10532-008-9175-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 01/10/2008] [Indexed: 11/30/2022]
Abstract
This study investigated extracellular electron shuttle-mediated RDX biodegradation and the distribution of ring cleavage metabolites generated by biological degradation (cells) versus the products formed by abiotic degradation (reduced electron shuttles), and when the two pathways were acting simultaneously. All pathways were influenced by pH. Buffered suspensions (pH 6.8/7.9/9.2) were performed with cell-free anthrahydroquinone-2,6-disulfonate as the sole electron donor, cells (Geobacter metallireducens) + acetate, or cells/acetate + anthraquinone-2,6-disulfonate as an electron shuttle. The metabolites identified included methylenedinitramine, formaldehyde, nitrous oxide, nitrite, ammonium and carbon dioxide. As pH increased, the rates of RDX reduction by AH(2)QDS also increased. Cells alone reduced RDX faster at the lower pH values. However, at all pH the rates of the electron shuttle-mediated pathways were consistently the fastest, and the proportion of carbon present as formaldehyde, which is a precursor to mineralization, was highest in the presence of electron shuttles. Formaldehyde accounted for 45/51/54% of the carbon in electron shuttle amended cell suspensions as opposed to 13/42/45% of carbon without shuttles at the pH 6.8/7.9/9.2, respectively. Approximately 7-20% of RDX was mineralized to CO(2) in the presence of cells at all pH tested; AQDS increased the extent of (14)CO(2) produced. Nitrous oxide and nitrite were end products in the strictly abiotic pathway, but nitrite was depleted in the presence of cells to form ammonium. Understanding the different products formed in the abiotic versus biological pathways and the influence of pH is critical to developing mixed biotic-abiotic remediation strategies for RDX.
Collapse
Affiliation(s)
- Man Jae Kwon
- Environmental Engineering and Sciences, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | | |
Collapse
|
46
|
Hatch JL, Finneran KT. Influence of reduced electron shuttling compounds on biological H2 production in the fermentative pure culture Clostridium beijerinckii. Curr Microbiol 2008; 56:268-73. [PMID: 18167025 DOI: 10.1007/s00284-007-9073-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 10/06/2007] [Indexed: 11/28/2022]
Abstract
Several reports suggest that extracellular electron shuttles influence fermentative metabolism in a beneficial manner for bioremediation and biotechnology strategies. The focus of this research was to characterize the effects of reduced electron shuttling molecules on fermentative H(2) production. Reduced electron shuttles may provide reducing equivalents to generate H(2), which influences alternate cellular processes. Electron shuttling compounds cycle between reduced-oxidized states and influence fermentative physiology. Clostridium beijerinckii fermentation was altered using a physiological approach that resulted in H(2) production with the reduced extracellular electron shuttle anthrahydroquinone-2,6,-disulfonate (AH(2)QDS) and biologically reduced humic substances as the primary electron donors. Cells were suspended in a buffer with an excess of the biological electron transfer molecule NAD(+), with AH(2)QDS (100-1000 microM) or biologically reduced humic substances (0.01-0.025 g/L) as the sole electron source. Increasing concentrations of AH(2)QDS and reduced humics increased H(2) production, while H(2) production was suppressed by Fe(III) hydroxides, which outcompeted the cells for electrons from the reduced shuttles, suggesting that the shuttles are in fact electron donors for H(2) production. Oxidized AQDS/humics did not increase H(2) production. Organic acid production shifted toward butyric acid in the presence of reduced electron shuttles, particularly with growing cells. Growth and hydrogen production rates in growing cells were initially faster in the presence of the reduced electron shuttles; however, the final biomass yield was inversely proportional to the starting AH(2)QDS concentration, which suggests that reduced shuttles may compete with anabolic cell processes for available energetic resources or that the shift to excess butyrate becomes toxic to the cells.
Collapse
Affiliation(s)
- Jennifer L Hatch
- University of Illinois at Urbana-Champaign, Environmental Engineering and Science Program, Civil and Environmental Engineering, 3221 Newmark Laboratory, 205 North Mathews Avenue, Urbana, IL 61801, USA
| | | |
Collapse
|
47
|
Production of eight different hydride complexes and nitrite release from 2,4,6-trinitrotoluene by Yarrowia lipolytica. Appl Environ Microbiol 2007; 73:7898-905. [PMID: 17933928 DOI: 10.1128/aem.01296-07] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
2,4,6-Trinitrotoluene (TNT) transformation by the yeast strain Yarrowia lipolytica AN-L15 was shown to occur via two different pathways. Direct aromatic ring reduction was the predominant mechanism of TNT transformation, while nitro group reduction was observed to be a minor pathway. Although growth of Y. lipolytica AN-L15 was inhibited initially in the presence of TNT, TNT transformation was observed, indicating that the enzymes necessary for TNT reduction were present initially. Aromatic ring reduction resulted in the transient accumulation of eight different TNT-hydride complexes, which were characterized using high-performance liquid chromatography, UV-visible diode array detection, and negative-mode atmospheric pressure chemical ionization mass spectrometry (APCI-MS). APCI-MS analysis revealed three different groups of TNT-hydride complexes with molecular ions at m/z 227, 228, and 230, which correspond to TNT-mono- and dihydride complexes and protonated dihydride isomers, respectively. One of the three protonated dihydride complex isomers detected appears to release nitrite in the presence of strain AN-L15. This release of nitrite is of particular interest since it can provide a pathway towards complete degradation and detoxification of TNT.
Collapse
|
48
|
Smets BF, Yin H, Esteve-Nuñez A. TNT biotransformation: when chemistry confronts mineralization. Appl Microbiol Biotechnol 2007; 76:267-77. [PMID: 17534614 DOI: 10.1007/s00253-007-1008-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Revised: 04/19/2007] [Accepted: 04/19/2007] [Indexed: 10/23/2022]
Abstract
Our understanding of the genetics and biochemistry of microbial 2,4,6-trinitrotoluene (TNT) biotransformation has advanced significantly during the past 10 years, and biotreatment technologies have developed. In this review, we summarize this new knowledge. A number of enzyme classes involved in TNT biotransformation include the type I nitroreductases, the old yellow enzyme family, a respiration-associated nitroreductase, and possibly ring hydroxylating dioxygenases. Several strains harbor dual pathways: nitroreduction (reduction of the nitro group in TNT to a hydroxylamino and/or amino group) and denitration (reduction of the aromatic ring of TNT to Meisenheimer complexes with nitrite release). TNT can serve as a nitrogen source for some strains, and the postulated mechanism involves ammonia release from hydroxylamino intermediates. Field biotreatment technologies indicate that both stimulation of microbial nitroreduction and phytoremediation result in significant and permanent immobilization of TNT via its metabolites. While the possibility for TNT mineralization was rekindled with the discovery of TNT denitration and oxygenolytic and respiration-associated pathways, further characterization of responsible enzymes and their reaction mechanisms are required.
Collapse
Affiliation(s)
- Barth F Smets
- Institute of Environment and Resources, Technical University of Denmark, Bygningstorvet, Bldg 115, 2800 Kgs. Lyngby, Denmark.
| | | | | |
Collapse
|
49
|
Shelobolina ES, Nevin KP, Blakeney-Hayward JD, Johnsen CV, Plaia TW, Krader P, Woodard T, Holmes DE, VanPraagh CG, Lovley DR. Geobacter pickeringii sp. nov., Geobacter argillaceus sp. nov. and Pelosinus fermentans gen. nov., sp. nov., isolated from subsurface kaolin lenses. Int J Syst Evol Microbiol 2007; 57:126-135. [PMID: 17220454 DOI: 10.1099/ijs.0.64221-0] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The goal of this project was to isolate representative Fe(III)-reducing bacteria from kaolin clays that may influence iron mineralogy in kaolin. Two novel dissimilatory Fe(III)-reducing bacteria, strains G12(T) and G13(T), were isolated from sedimentary kaolin strata in Georgia (USA). Cells of strains G12(T) and G13(T) were motile, non-spore-forming regular rods, 1-2 mum long and 0.6 mum in diameter. Cells had one lateral flagellum. Phylogenetic analyses using the 16S rRNA gene sequence of the novel strains demonstrated their affiliation to the genus Geobacter. Strain G12(T) was most closely related to Geobacter pelophilus (94.7 %) and Geobacter chapellei (94.1 %). Strain G13(T) was most closely related to Geobacter grbiciae (95.3 %) and Geobacter metallireducens (95.1 %). Based on phylogenetic analyses and phenotypic differences between the novel isolates and other closely related species of the genus Geobacter, the isolates are proposed as representing two novel species, Geobacter argillaceus sp. nov. (type strain G12(T)=ATCC BAA-1139(T)=JCM 12999(T)) and Geobacter pickeringii sp. nov. (type strain G13(T)=ATCC BAA-1140(T)=DSM 17153(T)=JCM 13000(T)). Another isolate, strain R7(T), was derived from a primary kaolin deposit in Russia. The cells of strain R7(T) were motile, spore-forming, slightly curved rods, 0.6 x 2.0-6.0 microm in size and with up to six peritrichous flagella. Strain R7(T) was capable of reducing Fe(III) only in the presence of a fermentable substrate. 16S rRNA gene sequence analysis demonstrated that this isolate is unique, showing less than 92 % similarity to bacteria of the Sporomusa-Pectinatus-Selenomomas phyletic group, including 'Anaerospora hongkongensis' (90.2 %), Acetonema longum (90.6 %), Dendrosporobacter quercicolus (90.9 %) and Anaerosinus glycerini (91.5 %). On the basis of phylogenetic analysis and physiological tests, strain R7(T) is proposed to represent a novel genus and species, Pelosinus fermentans gen. nov., sp. nov. (type strain R7(T)=DSM 17108(T)=ATCC BAA-1133(T)), in the Sporomusa-Pectinatus-Selenomonas group.
Collapse
Affiliation(s)
- Evgenya S Shelobolina
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Kelly P Nevin
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Jessie D Blakeney-Hayward
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Claudia V Johnsen
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Todd W Plaia
- American Type Culture Collection, 10801 University Blvd, Manassas, VA 20110, USA
| | - Paul Krader
- American Type Culture Collection, 10801 University Blvd, Manassas, VA 20110, USA
| | - Trevor Woodard
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Dawn E Holmes
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Catherine Gaw VanPraagh
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| | - Derek R Lovley
- Dept of Microbiology, University of Massachusetts, Morrill Science Center IVN, Amherst, MA 01003, USA
| |
Collapse
|
50
|
Borch T, Fendorf S. Chapter 12 Phosphate Interactions with Iron (Hydr)oxides: Mineralization Pathways and Phosphorus Retention upon Bioreduction. DEVELOPMENTS IN EARTH AND ENVIRONMENTAL SCIENCES 2007. [DOI: 10.1016/s1571-9197(07)07012-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|