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Marques Mendonca R, Fulton T, Blackwood C, Costello D. Sublethal nickel toxicity shuts off manganese oxidation and pellicle biofilm formation in Pseudomonas putida GB-1. Environ Microbiol 2023; 25:3639-3654. [PMID: 37875338 DOI: 10.1111/1462-2920.16529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 10/11/2023] [Indexed: 10/26/2023]
Abstract
In sediments, the bioavailability and toxicity of Ni are strongly influenced by its sorption to manganese (Mn) oxides, which largely originate from the redox metabolism of microbes. However, microbes are concurrently susceptible to the toxic effects of Ni, which establishes complex interactions between toxicity and redox processes. This study measured the effect of Ni on growth, pellicle biofilm formation and oxidation of the Mn-oxidizing bacteria Pseudomonas putida GB-1. In liquid media, Ni exposure decreased the intrinsic growth rate but allowed growth to the stationary phase in all intermediate treatments. Manganese oxidation was 67% less than control for bacteria exposed to 5 μM Ni and completely ceased in all treatments above 50 μM. Pellicle biofilm development decreased exponentially with Ni concentration (maximum 92% reduction) and was replaced by planktonic growth in higher Ni treatments. In solid media assays, growth was unaffected by Ni exposure, but Mn oxidation completely ceased in treatments above 10 μM of Ni. Our results show that sublethal Ni concentrations substantially alter Mn oxidation rates and pellicle biofilm development in P. putida GB-1, which has implications for toxic metal bioavailability to the entire benthic community and the environmental consequences of metal contamination.
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Affiliation(s)
| | - Taylor Fulton
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
- Department of Food, Agricultural and Biological Engineering, Ohio State University, Columbus, Ohio, USA
| | - Christopher Blackwood
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, Michigan, USA
| | - David Costello
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
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2
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Qian A, Lu Y, Zhang Y, Yu C, Zhang P, Liao W, Yao Y, Zheng Y, Tong M, Yuan S. Mechanistic Insight into Electron Transfer from Fe(II)-Bearing Clay Minerals to Fe (Hydr)oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:8015-8025. [PMID: 37204932 DOI: 10.1021/acs.est.3c01250] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Electron transfer (ET) is the essence of most biogeochemical processes related to element cycling and contaminant attenuation, whereas ET between different minerals and the controlling mechanism remain elusive. Here, we used surface-associated Fe(II) as a proxy to explore ET between reduced nontronite NAu-2 (rNAu-2) and Fe (hydr)oxides in their coexisting systems. Results showed that ET could occur from rNAu-2 to ferrihydrite but not to goethite, and the ET amount was determined by the number of reactive sites and the reduction potential difference between rNAu-2 and ferrihydrite. ET proceeded mainly through the mineral-mineral interface, with a negligible contribution of dissolved Fe2+/Fe3+. Control experiments by adding K+ and increasing salinity together with characterizations by X-ray diffraction, scanning electron microscopy/energy-dispersive spectrometry, and atomic force microscopy suggested that ferrihydrite nanoparticles inserted the interlayer space in rNAu-2 where structural Fe(II) in rNAu-2 transferred electrons mainly through the basal plane to ferrihydrite. This study implicates the occurrence of ET between different redox-active minerals through the mineral-mineral interface. As minerals at different reduction potentials often coexist in soils/sediments, the mineral-mineral ET may play an important role in subsurface biogeochemical processes.
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Affiliation(s)
- Ao Qian
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Yuxi Lu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Yanting Zhang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Chenglong Yu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Peng Zhang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Wenjuan Liao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, P. R. China
| | - Yao Yao
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Yunsong Zheng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Man Tong
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Songhu Yuan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
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Newsome L, Bacon CGD, Song H, Luo Y, Sherman DM, Lloyd JR. Natural attenuation of lead by microbial manganese oxides in a karst aquifer. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 754:142312. [PMID: 33254903 DOI: 10.1016/j.scitotenv.2020.142312] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/07/2020] [Accepted: 09/07/2020] [Indexed: 05/27/2023]
Abstract
Lead is a toxic environmental contaminant associated with current and historic mine sites. Here we studied the natural attenuation of Pb in a limestone cave system that receives drainage from the ancient Priddy Mineries, UK. Extensive deposits of manganese oxides were observed to be forming on the cave walls and as coatings in the stream beds. Analysis of these deposits identified them as birnessite (δ-MnO2), with some extremely high concentrations of sorbed Pb (up to 56 wt%) also present. We hypothesised that these cave crusts were actively being formed by microbial Mn(II)-oxidation, and to investigate this the microbial communities were characterised by DNA sequencing, enrichment and isolation experiments. The birnessite deposits contained abundant and diverse prokaryotes and fungi, with ~5% of prokaryotes and ~ 10% of fungi closely related to known heterotrophic Mn(II)-oxidisers. A substantial proportion (up to 17%) of prokaryote sequences were assigned to groups known as autotrophic ammonia and nitrite oxidisers, suggesting that nitrogen cycling may play an important role in contributing energy and carbon to the cave crust microbial communities and consequently the formation of Mn(IV) oxides and Pb attenuation. Enrichment and isolation experiments showed that the birnessite deposits contained Mn(II)-oxidising microorganisms, and two isolates (Streptomyces sp. and Phyllobacterium sp.) could oxidise Mn(II) in the presence of 0.1 mM Pb. Supplying the enrichment cultures with acetate as a source of energy and carbon stimulated Mn(II)-oxidation, but excess organics in the form of glucose generated aqueous Mn(II), likely via microbial Mn(IV)-reduction. In this karst cave, microbial Mn(II)-oxidation contributes to the active sequestration and natural attenuation of Pb from contaminated waters, and therefore may be considered a natural analogue for the design of wastewater remediation systems and for understanding the geochemical controls on karst groundwater quality, a resource relied upon by billions of people across the globe.
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Affiliation(s)
- Laura Newsome
- Williamson Research Centre, Department of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, United Kingdom.
| | - Charles G D Bacon
- School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, United Kingdom
| | - Hokyung Song
- Williamson Research Centre, Department of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Yunyao Luo
- Williamson Research Centre, Department of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, United Kingdom
| | - David M Sherman
- School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, United Kingdom
| | - Jonathan R Lloyd
- Williamson Research Centre, Department of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, United Kingdom
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Mota EA, Felestrino ÉB, Leão VA, Guerra-Sá R. Manganese (II) removal from aqueous solutions by Cladosporium halotolerans and Hypocrea jecorina. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2020; 25:e00431. [PMID: 32071895 PMCID: PMC7013165 DOI: 10.1016/j.btre.2020.e00431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 01/20/2020] [Accepted: 02/03/2020] [Indexed: 11/26/2022]
Abstract
Manganese (Mn) is toxic at higher concentrations requiring its removal before returning the wastewater to the environment. This article reported the Mn removal of two fungi strains isolated from mine wastewater. ITS rRNA region sequencing identified the fungi strains as Cladosporium halotolerans and Hypocrea jecorina. Mn2+ removal assays were performed in Sabouraud broth with 50 mg L-1 Mn2+ supplemented and bioleaching assays using MnO2 instead of MnSO4 at the same conditions. C. halotolerans removed 96 % of 50 mg L-1 Mn2+ at two weeks without MnO2 bioleaching with 649.9 mg of biomass and H. jecorina removed about 50 % of Mn2+ in 21 days from initial 50 mg of Mn2+ L-1 with 316.8 mg of biomass. Extracellular laccases were present in C. halotolerans agar regardless of the Mn addition. Mn adsorbed was detected on C. halotolerans hyphae. Mn oxidation was positive to H. jecorina by reaction of its medium with Leucoberbelin blue.
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Key Words
- ABTS, 2,2’-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid)
- CTAB, Hexadecyltrimethylammonium bromide
- Chelating
- Cladosporium halotolerans
- EDX, Energy-dispersive spectroscopy
- Hypocrea jecorina
- ITS, Intergenic Spacer
- LAC1/2, Laccase genes 1/2
- LBB, Leucoberbelin blue or N.N'-Dimethylamino-β, β'-triphenylmethane-o-sulphonic acid
- Manganese
- Mcos, Multicopper oxidases
- Mn oxidation
- PCR, Polymerase Chain Reaction
- SEM, Scanning electronic microscopy
- nBLAST, nucleotide Basic Local Alignment Search Tool
- rRNA, ribosomal Ribonucleic Acid
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Affiliation(s)
- Ester Alves Mota
- Biochemistry and Molecular Biology Laboratory, Department of Biological Sciences, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, Brazil
| | - Érica Barbosa Felestrino
- Biochemistry and Molecular Biology Laboratory, Department of Biological Sciences, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, Brazil
| | - Versiane Albis Leão
- Bio & Hydrometallurgy Laboratory, Department of Metallurgical and Materials Engineering, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, MG, Ouro Preto, Brazil
| | - Renata Guerra-Sá
- Biochemistry and Molecular Biology Laboratory, Department of Biological Sciences, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, Brazil,Corresponding author. Present address: Universidade Federal de Ouro Preto, Departamento de Ciências Biológicas/ Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, ICEB 2, Sala 045 Campus Morro do Cruzeiro, 35400-000, Ouro Preto, MG, Brazil.
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Liu T, Yuan J, Zhang B, Liu W, Lin L, Meng Y, Yin S, Liu C, Luan F. Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:14612-14619. [PMID: 31738519 DOI: 10.1021/acs.est.9b06790] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Removal of uranium from groundwater is of great significance as compared to in situ bioimmobilization technology. In this study, a novel direct electro-reductive method has been developed to efficiently remove and recover uranium from carbonate-containing groundwater, where U(VI)O2(CO3)34- and Ca2U(VI)O2(CO3)3 are the dominant U species. The transferred electron calculations and XPS, XRD analyses confirmed that U(VI) was reduced to U(IV)O2 and accumulated on the surface of the Ti electrode (defined as Ti@U(IV)O2 electrode) with high current efficiencies (over 90.0%). Moreover, over 98.0% of the accumulated U(IV)O2 could be recovered by soaking the Ti@U(IV)O2 electrode in the dilute nitric acid. Results demonstrated that the accumulated U(IV)O2 on the surface of the Ti electrode played a key role in the removal of U(VI), which can promote the electro-reduction of U(VI). Therefore, the electrode could be used repeatedly and has a high removal capacity of U(VI) due to the continuous accumulation of active U(IV)O2 on the surface of the electrode. Significantly, the uranium in both real and high salinity groundwater can be efficiently removed. This study implies that the proposed direct electro-reductive method has great potential for the removal and recovery of uranium from groundwater and uranium-containing wastewater.
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Affiliation(s)
- Tian Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics , Hunan University , Changsha 410082 , P. R. China
| | - Jili Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics , Hunan University , Changsha 410082 , P. R. China
| | - Bo Zhang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , P. R. China
| | - Wenbin Liu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Leiming Lin
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Ying Meng
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , P. R. China
| | - Shuangfeng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics , Hunan University , Changsha 410082 , P. R. China
| | - Chengbin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics , Hunan University , Changsha 410082 , P. R. China
| | - Fubo Luan
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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6
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Wu Y, Wang Y, Guo W. Behavior and fate of geogenic uranium in a shallow groundwater system. JOURNAL OF CONTAMINANT HYDROLOGY 2019; 222:41-55. [PMID: 30827739 DOI: 10.1016/j.jconhyd.2019.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 01/09/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
To unveil behavior and fate of uranium (U) in the Quaternary aquifer system of Datong basin (China), we analyzed sediment and groundwater samples, and performed geochemical modeling. The analyses for sediments were implemented by a sequential extraction procedure and measurements including X-ray power diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Concentrations of main elements and U, and 234U/238U activity ratios for groundwater were determined. Results show that sediment U contents range from 1.93 to 8.80 (average 3.00 ± 1.69) mg/kg. In relation to the total U, average fractions of residual U (probably as betafite) and U(VI) bound to carbonates and FeMn oxides are 74.4 ± 18.7%, 17.2 ± 13.3%, and 4.3 ± 2.9%, respectively. Lower average fractions were determined for both organic matter- and sulfide-bound U (mainly as U(IV), e.g., brannerite) (2.0 ± 0.7%) and exchangeable U(VI) (2.0 ± 2.8%). For the groundwater (pH 7.36-8.86), Ca2UO2(CO3)30, CaUO2(CO3)32-, and UO2(CO3)34- constitute >99.5% of the total dissolved U; and elevated U concentrations occur mainly in shallow aquifers (3-40 m deep below land surface) of the west flow-through and discharge areas, with 50% of the sampled points exceeding 30 μg/L. We argue that betafite and carbonate weathering and U(VI) desorption from ferrihydrite are the primary geochemical processes responsible for U mobilization, with a minor contrition from U(IV) oxidation. Abiotic U(IV) oxidation may be induced mainly by dissolved oxygen under oxic/suboxic conditions (e.g., in the recharge and flow-through areas), but significantly linked to amorphous ferrihydrite under Fe(III)- and sulfate-reducing conditions. Abiotic U(VI) reduction could be caused principally by siderite and mackinawite. Under alkaline conditions, higher HCO3- concentrations and lower Ca2+/HCO3- molar ratios (<~0.2) cause formation of CaUO2(CO3)32- and UO2(CO3)34-, and U(VI) desorption. With increases in concentrations of Ca2+ and Ca2+/HCO3- ratios (>~0.2), these anionic forms may shift to neutral Ca2UO2(CO3)30, which can facilitate further desorption of U(VI). Our results improve the understanding of U environmental geochemistry and are important for groundwater resources management in this and similar other Quaternary aquifer systems.
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Affiliation(s)
- Ya Wu
- School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China.
| | - Yanxin Wang
- School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China.
| | - Wei Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
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Pan C, Liu H, Catalano JG, Qian A, Wang Z, Giammar DE. Rates of Cr(VI) Generation from Cr xFe 1-x(OH) 3 Solids upon Reaction with Manganese Oxide. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12416-12423. [PMID: 29043792 DOI: 10.1021/acs.est.7b04097] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The reaction of manganese oxides with Cr(III)-bearing solids in soils and sediments can lead to the natural production of Cr(VI) in groundwater. Building on previous knowledge of MnO2 as an oxidant for Cr(III)-containing solids, this study systematically evaluated the rates and mechanisms of the oxidation of Cr(III) in iron oxides by δ-MnO2. The Fe/Cr ratio (x = 0.055-0.23 in CrxFe1-x(OH)3) and pH (5-9) greatly influenced the Cr(VI) production rates by controlling the solubility of Cr(III) in iron oxides. We established a quantitative relationship between Cr(VI) production rates and Cr(III) solubility of CrxFe1-x(OH)3, which can help predict Cr(VI) production rates at different conditions. The adsorption of Cr(VI) and Mn(II) on solids shows a typical pH dependence for anions and cations. A multichamber reactor was used to assess the role of solid-solid contact in CrxFe1-x(OH)3-MnO2 interactions, which eliminates the contact of the two solids while still allowing aqueous species transport across a permeable membrane. Cr(VI) production rates were much lower in multichamber than in completely mixed batch experiments, indicating that the redox interaction is accelerated by mixing of the solids. Our results suggest that soluble Cr(III) released from CrxFe1-x(OH)3 solids to aqueous solution can migrate to MnO2 surfaces where it is oxidized.
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Affiliation(s)
- Chao Pan
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis , St. Louis, Missouri, 63130 United States
| | - Huan Liu
- State Key Laboratory for Mineral Deposits Research, Nanjing University , Nanjing, P.R. China
| | - Jeffrey G Catalano
- Department of Earth and Planetary Sciences, Washington University in St. Louis , St. Louis, Missouri, 63130 United States
| | - Ao Qian
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Wuhan, P. R. China
| | - Zimeng Wang
- Department of Civil and Environmental Engineering, Louisiana State University , Baton Rouge, Louisiana 70803 United States
| | - Daniel E Giammar
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis , St. Louis, Missouri, 63130 United States
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Wufuer R, Wei Y, Lin Q, Wang H, Song W, Liu W, Zhang D, Pan X, Gadd GM. Uranium Bioreduction and Biomineralization. ADVANCES IN APPLIED MICROBIOLOGY 2017; 101:137-168. [PMID: 29050665 DOI: 10.1016/bs.aambs.2017.01.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Following the development of nuclear science and technology, uranium contamination has been an ever increasing concern worldwide because of its potential for migration from the waste repositories and long-term contaminated environments. Physical and chemical techniques for uranium pollution are expensive and challenging. An alternative to these technologies is microbially mediated uranium bioremediation in contaminated water and soil environments due to its reduced cost and environmental friendliness. To date, four basic mechanisms of uranium bioremediation-uranium bioreduction, biosorption, biomineralization, and bioaccumulation-have been established, of which uranium bioreduction and biomineralization have been studied extensively. The objective of this review is to provide an understanding of recent developments in these two fields in relation to relevant microorganisms, mechanisms, influential factors, and obstacles.
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Ferreira CMH, Pinto ISS, Soares EV, Soares HMVM. (Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review. RSC Adv 2015. [DOI: 10.1039/c4ra15453c] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The present work reviews, discusses and update the metal complexation characteristics of thirty one buffers commercially available. Additionally, their impact on the biological systems is also presented and discussed.
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Affiliation(s)
- Carlos M. H. Ferreira
- REQUIMTE/LAQV
- Department of Chemical Engineering
- Faculty of Engineering
- University of Porto
- Porto
| | - Isabel S. S. Pinto
- REQUIMTE/LAQV
- Department of Chemical Engineering
- Faculty of Engineering
- University of Porto
- Porto
| | - Eduardo V. Soares
- Bioengineering Laboratory
- Chemical Engineering Department
- ISEP-School of Engineering of Polytechnic Institute of Porto
- Porto
- Portugal
| | - Helena M. V. M. Soares
- REQUIMTE/LAQV
- Department of Chemical Engineering
- Faculty of Engineering
- University of Porto
- Porto
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10
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Wang Z, Giammar DE. Metal Contaminant Oxidation Mediated by Manganese Redox Cycling in Subsurface Environment. ACS SYMPOSIUM SERIES 2015. [DOI: 10.1021/bk-2015-1197.ch002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zimeng Wang
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Daniel E. Giammar
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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11
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Wang Z, Xiong W, Tebo BM, Giammar DE. Oxidative UO2 dissolution induced by soluble Mn(III). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 48:289-298. [PMID: 24286164 DOI: 10.1021/es4037308] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The stability of UO2 is critical to the success of reductive bioremediation of uranium. When reducing conditions are no longer maintained, Mn redox cycling may catalytically mediate the oxidation of UO2 and remobilization of uranium. Ligand-stabilized soluble Mn(III) was recently recognized as an important redox-active intermediate in Mn biogeochemical cycling. This study evaluated the kinetics of oxidative UO2 dissolution by soluble Mn(III) stabilized by pyrophosphate (PP) and desferrioxamine B (DFOB). The Mn(III)-PP complex was a potent oxidant that induced rapid UO2 dissolution at a rate higher than that by a comparable concentration of dissolved O2. However, the Mn(III)-DFOB complex was not able to induce oxidative dissolution of UO2. The ability of Mn(III) complexes to oxidize UO2 was probably determined by whether the coordination of Mn(III) with ligands allowed the attachment of the complexes to the UO2 surface to facilitate electron transfer. Systematic investigation into the kinetics of UO2 oxidative dissolution by the Mn(III)-PP complex suggested that Mn(III) could directly oxidize UO2 without involving particulate Mn species (e.g., MnO2). The expected 2:1 reaction stoichiometry between Mn(III) and UO2 was observed. The reactivity of soluble Mn(III) in oxidizing UO2 was higher at lower ratios of pyrophosphate to Mn(III) and lower pH, which is probably related to differences in the ligand-to-metal ratio and/or protonation states of the Mn(III)-pyrophosphate complexes. Disproportionation of Mn(III)-PP occurred at pH 9.0, and the oxidation of UO2 was then driven by both MnO2 and soluble Mn(III). Kinetic models were derived that provided excellent fits of the experimental results.
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Affiliation(s)
- Zimeng Wang
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
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