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Real C, Villares R, Vázquez MD. A method for studying the influence of Mn oxyhydroxides on the trace element content of aquatic bryophytes. Sci Total Environ 2024; 932:173045. [PMID: 38734098 DOI: 10.1016/j.scitotenv.2024.173045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 04/18/2024] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
The main objective of this study was to develop and test a method of separating externally deposited Mn oxyhydroxides and co-precipitated elements from samples of aquatic moss (the moss Fontinalis antipyretica). The method, which uses 0.1 M hydroxylamine to dissolve the oxyhydroxides, was tested with samples collected in rivers with slightly acidic, well‑oxygenated waters, where high rates of Mn precipitation occur. The method was effective (it extracted up to 84 % of the Mn) and selective (Fe oxyhydroxides were not extracted). The elements Ba, Cd, Zn and Ni were associated with the Mn oxyhydroxides, while Al, As, Cr, Cu, Fe, Hg and Pb were not. Deposition of Mn therefore increased the concentration of some elements in the moss samples. However, as Mn precipitation depends on Eh and pH, which are independent of the concentrations of the elements in water, the relationship between water and moss element concentrations is not clear (i.e. the data are noisy). This is a problem in biomonitoring studies, which assume a close relationship between element concentrations in moss and water. The value of the proposed extraction method is that it can be used to correct the effect of Mn deposition. We present an example of this correction applied to the Cd concentrations in the test data. We found that the noise introduced by the Mn, including age-related effects (observed by comparing concentrations in 0-2.5 and 2.2-5.0 cm sections from the shoot apex), can be reduced. Additionally, the correction revealed recent increases in Cd concentrations in one site that were not observed in the uncorrected data. Another finding of interest was the low content of total Mn and different extractability (of most elements) observed in moss samples collected in alkaline waters. Finally, we discuss how future studies designed for different environmental scenarios can benefit from application of the proposed method.
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Affiliation(s)
- Carlos Real
- Functional Biology Department, Ecology Unit, Higher Polytechnic School of Engineering, Universidade de Santiago de Compostela, Campus Terra, Lugo 27003, Spain.
| | - Rubén Villares
- Functional Biology Department, Ecology Unit, Higher Polytechnic School of Engineering, Universidade de Santiago de Compostela, Campus Terra, Lugo 27003, Spain
| | - María Dolores Vázquez
- Functional Biology Department, Ecology Unit, Higher Polytechnic School of Engineering, Universidade de Santiago de Compostela, Campus Terra, Lugo 27003, Spain
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2
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Inaba T, Aizawa H, Aoyagi T, Sato Y, Hori T, Nishimura T, Habe H. Startup performance and microbial composition of a pilot-scale rapid sand filter for the treatment of manganese-containing mine water. Chemosphere 2023; 343:140229. [PMID: 37742770 DOI: 10.1016/j.chemosphere.2023.140229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 07/27/2023] [Accepted: 09/18/2023] [Indexed: 09/26/2023]
Abstract
The inexpensive removal of soluble manganese [Mn(II)] from mine water that contains large quantities of Mn(II) should be prioritized given that large quantities of alkaline reagents are typically used in the chemical treatment of Mn-rich water from abandoned mines. Rapid sand filter (RSF) systems are widely used as a cost-effective technology in drinking water treatment processes to remove iron and Mn from groundwater. Here, we applied a pilot-scale RSF to treat mine water with a neutral pH and containing approximately 22 mg/L of Mn(II). Following a lag phase from its startup (day 1-day 26), Mn removal rates increased to approximately 40% for around 1 month (day 27-day 55) without the use of alkaline reagents but did not increase during further operation. Quantitative elemental analysis revealed Mn oxides on the sand filters during the Mn removal period. The bacterial communities on the RSFs, recorded on day 42 and day 85, were characterized and compared using 16S rRNA gene amplicon sequencing. Although the well-known Mn-oxidizing bacteria (MOB) were not listed among the ten most dominant operational taxonomic units (OTUs) on the sand filters (relative abundances: >0.68%), a significant increase in the OTUs related to well-known alphaproteobacterial MOB, such as Pedomicrobium spp., were observed during the period.
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Affiliation(s)
- Tomohiro Inaba
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Hidenobu Aizawa
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Tomo Aoyagi
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Yuya Sato
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Tomoyuki Hori
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Takuro Nishimura
- Nagaoka International Corp., 1-8-15 Azuchimachi, Chuo-ku, Osaka, Osaka, 541-0052, Japan.
| | - Hiroshi Habe
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan.
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3
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Kuang X, Peng L, Cheng Z, Zhou S, Chen S, Peng C, Song H, Li C, Li D. Fertilizer-induced manganese oxide formation enhances cadmium removal by paddy crusts from irrigation water. J Hazard Mater 2023; 458:132030. [PMID: 37441865 DOI: 10.1016/j.jhazmat.2023.132030] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/27/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023]
Abstract
Fertilization is a crucial agrological measure for agricultural production that can significantly impact the removal of Cd from irrigation water by paddy crusts (PC). In this study, laboratory and field experiments were conducted to investigate the impact of fertilization at low, medium, and high concentrations on the accumulation of Cadmium (Cd) in PC and the underlying mechanisms involved. The results showed that only low fertilizer concentration could promote the removal of Cd by PC, which reduced the Cd concentration in irrigation water from 19.52 μg/L to 5.35 μg/L. Conversely, medium and high fertilizer concentrations reduced the accumulation of Cd by PC. After fertilizer addition, the proportion of Fe-Mn oxidizable-Cd in PC reached 55 % (with low concentration of fertilizer treatment). The application of low concentration of fertilizer was found to stimulate the growth of filamentous green algae, leading to a significant increase in the relative abundance of sphingomonadaceae (by 1.39 %) and comamonadaceae (by 1.29 %). The XRD, SEM and correlation analysis show that a large amount of manganese oxide is formed on the surface of PC, which increases the fixation of Cd. These findings provide a new perspective for the remediation of heavy metal contamination in paddy fields.
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Affiliation(s)
- Xiaolin Kuang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China.
| | - Ziyi Cheng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Siyan Zhou
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Shaoning Chen
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Cheng Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Huijuan Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Changwu Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Dan Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
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4
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Cheng Q, Liu Z, Huang Y, Li F, Nengzi L, Zhang J. Influence of temperature on COD Mn and Mn 2+ removal and microbial community structure in pilot-scale biofilter. Bioresour Technol 2020; 316:123968. [PMID: 32781387 DOI: 10.1016/j.biortech.2020.123968] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/28/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
Test water temperature (TWT) is a significant operational parameter in biofilter. In this study, a pilot-scale biofilter was established to investigate the removal efficiency of CODMn and Mn2+ and the microbial community structure at different TWT. When CODMn and Mn2+ in the influent were 6-8 and 0.9-1.2 mg/L, respectively, the removal rates were 22.61% and 94.28% at the low TWT, while 69.42% and 97.85% at the high TWT, respectively. Biological CODMn and Mn2+ removal followed the first-order reaction, and at the low and high TWT, the k value was 0.00704 and 0.0738 and 0.0313 and 0.113 min-1, respectively. Organic matter oxidizing bacteria (OMOB, Sphingopyxis, Sphingomonas, Amphiplicatus, Novosphingobium, Gemmatimonas, Chryseolinea and Sphingobium) and manganese oxidizing bacteria (MnOB, Hyphomicrobium, Pedomicrobium and Pseudomonas) were coexisted in 0-1.5 m of the biofilter bed at the low and high TWT, and the abundances were not the main factor affecting the removal efficiency, however the activity.
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Affiliation(s)
- Qingfeng Cheng
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, PR China.
| | - Zongyang Liu
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, PR China
| | - Yang Huang
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, PR China
| | - Fengjiao Li
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, PR China
| | - Lichao Nengzi
- College of Resources and Environment, Xichang University, Xichang 615000, PR China
| | - Jie Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China
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Abstract
Biogenic metal oxides (MxOy) feature structures as highly functional and unique as the organisms generating them. They have caught the attention of scientists for the development of novel materials by biomimicry. In order to understand how biogenic MxOy could inspire novel technologies, we have reviewed examples of all biogenic MxOy, as well as the current state of understanding of the interactions between the inorganic MxOy and the biological matter they originate from and are connected to. In this review, we first summarize the origins of the precursors that living nature converts into MxOy. From the point-of-view of our materials chemists, we present an overview of the biogenesis of silica, iron and manganese oxides, as the only reported biogenic MxOy to date. These MxOy are found across all five kingdoms (bacteria, protoctista, fungi, plants and animals). We discuss the key molecules involved in the biosynthesis of MxOy, the functionality of the MxOy structures, and the techniques by which the biogenic MxOy can be studied. We close by outlining the biomimetic approaches inspired by biogenic MxOy materials and their challenges, and we point at promising directions for future organic-inorganic materials and their synthesis.
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Affiliation(s)
- Hipassia M. Moura
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria;
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
| | - Miriam M. Unterlass
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria;
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
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Zhang Y, Tang Y, Qin Z, Luo P, Ma Z, Tan M, Kang H, Huang Z. A novel manganese oxidizing bacterium-Aeromonas hydrophila strain DS02: Mn(II) oxidization and biogenic Mn oxides generation. J Hazard Mater 2019; 367:539-545. [PMID: 30654278 DOI: 10.1016/j.jhazmat.2019.01.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/20/2018] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
The extensive applications of biogenic manganese oxides (BioMnOx) generated by manganese oxidizing bacteria (MOB) have attracted considerable attentions. In this study, we report on a novel MOB that has been isolated from sediments and identified as Aeromonas hydrophila strain DS02. The Mn(II) oxidation activity of strain DS02 under Mn(II) stress and the application of the associated BioMnOx products were investigated. Nearly 90.0% (495 mg L-1) of the soluble Mn(II) were removed and 45.6% (240 mg L-1) was converted to Mn(III/IV). Fitting the XPS data showed that Mn(IV)-oxide is the major component (82.0%) of the flake-shaped BioMnOx, corresponding to an average Mn oxidation number of 3.71. When the BioMnOx were coupled with the PMS activation, a 99.5% catalytic degradation of 2,4-dimethylaniline was observed after 80 min, revealing a high degradation efficiency.
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Affiliation(s)
- Yue Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Yankui Tang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, 530004, China.
| | - Zhiyi Qin
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Penghong Luo
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Zhou Ma
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Mengying Tan
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Houyao Kang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Zhining Huang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China; Guangxi Association of Environmental Protection Industry, Nanning, 530004, China
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Barboza NR, Morais MMCA, Queiroz PS, Amorim SS, Guerra-Sá R, Leão VA. High Manganese Tolerance and Biooxidation Ability of Serratia marcescens Isolated from Manganese Mine Water in Minas Gerais, Brazil. Front Microbiol 2017; 8:1946. [PMID: 29062307 PMCID: PMC5640716 DOI: 10.3389/fmicb.2017.01946] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/22/2017] [Indexed: 11/23/2022] Open
Abstract
Manganese is an important metal for the maintenance of several biological functions, but it can be toxic in high concentrations. One of the main forms of human exposure to metals, such as manganese (Mn), is the consumption of solar salt contaminated. Mn-tolerant bacteria could be used to decrease the concentration of this metal from contaminated sites through safer environmental-friendly alternative technology in the future. Therefore, this study was undertaken to isolate and identify Mn resistant bacteria from water samples collected from a Mn mine in the Iron Quadrangle region (Minas Gerais, Brazil). Two bacterial isolates were identified as Serratia marcescens based on morphological, biochemical, 16S rDNA gene sequencing and phylogeny analysis. Maximum resistance of the selected isolates against increasing concentrations of Mn(II), up to 1200 mg L-1 was determined in solid media. A batch assay was developed to analyze and quantify the Mn removal capacities of the isolates. Biological Mn removal capacities of over 55% were detected for both isolates. Whereas that mechanism like biosorption, precipitation and oxidation could be explaining the Mn removal, we seek to give an insight into some of the molecular mechanisms adopted by S. marcescens isolates. For this purpose, the following approaches were adopted: leucoberbelin blue I assay, Mn(II) oxidation by cell-free filtrate and electron microscopy and energy-dispersive X-ray spectroscopy analyses. Overall, these results indicate that S. marcescens promotes Mn removal in an indirect mechanism by the formation of Mn oxides precipitates around the cells, which should be further explored for potential biotechnological applications for water recycling both in hydrometallurgical and mineral processing operations.
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Affiliation(s)
- Natália R Barboza
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológica (NUPEB), Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | | | - Pollyana S Queiroz
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológica (NUPEB), Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Soraya S Amorim
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológica (NUPEB), Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Renata Guerra-Sá
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológica (NUPEB), Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Versiane A Leão
- Laboratório de Bio&Hidrometalurgia, Departamento de Engenharia Metalúrgica e de Materiais, Escola de Minas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
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Okano K, Furuta S, Ichise S, Miyata N. Whole-Genome Sequences of Two Manganese(II)-Oxidizing Bacteria, Bosea sp. Strain BIWAKO-01 and Alphaproteobacterium Strain U9-1i. Genome Announc 2016; 4:e01309-16. [PMID: 27881541 DOI: 10.1128/genomeA.01309-16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This report describes the whole-genome sequences of two Mn(II)-oxidizing bacteria, filamentous Mn oxide microparticle-forming Bosea sp. strain BIWAKO-01 and alphaproteobacterium strain U9-1i.
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Koilraj P, Smith SM, Yu Q, Ulrich S, Sasaki K. Encapsulation of a powdery spinel-type Li+ ion sieve derived from biogenic manganese oxide in alginate beads. POWDER TECHNOL 2016; 301:1201-7. [DOI: 10.1016/j.powtec.2016.08.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Wright MH, Farooqui SM, White AR, Greene AC. Production of Manganese Oxide Nanoparticles by Shewanella Species. Appl Environ Microbiol 2016; 82:5402-9. [PMID: 27342559 DOI: 10.1128/AEM.00663-16] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 06/21/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Several species of the bacterial genus Shewanella are well-known dissimilatory reducers of manganese under anaerobic conditions. In fact, Shewanella oneidensis is one of the most well studied of all metal-reducing bacteria. In the current study, a number of Shewanella strains were tested for manganese-oxidizing capacity under aerobic conditions. All were able to oxidize Mn(II) and to produce solid dark brown manganese oxides. Shewanella loihica strain PV-4 was the strongest oxidizer, producing oxides at a rate of 20.3 mg/liter/day and oxidizing Mn(II) concentrations of up to 9 mM. In contrast, S. oneidensis MR-1 was the weakest oxidizer tested, producing oxides at 4.4 mg/liter/day and oxidizing up to 4 mM Mn(II). Analysis of products from the strongest oxidizers, i.e., S loihica PV-4 and Shewanella putrefaciens CN-32, revealed finely grained, nanosize, poorly crystalline oxide particles with identical Mn oxidation states of 3.86. The biogenic manganese oxide products could be subsequently reduced within 2 days by all of the Shewanella strains when culture conditions were made anoxic and an appropriate nutrient (lactate) was added. While Shewanella species were detected previously as part of manganese-oxidizing consortia in natural environments, the current study has clearly shown manganese-reducing Shewanella species bacteria that are able to oxidize manganese in aerobic cultures. IMPORTANCE Members of the genus Shewanella are well known as dissimilatory manganese-reducing bacteria. This study shows that a number of species from Shewanella are also capable of manganese oxidation under aerobic conditions. Characterization of the products of the two most efficient oxidizers, S. loihica and S. putrefaciens, revealed finely grained, nanosize oxide particles. With a change in culture conditions, the manganese oxide products could be subsequently reduced by the same bacteria. The ability of Shewanella species both to oxidize and to reduce manganese indicates that the genus plays a significant role in the geochemical cycling of manganese. Due to the high affinity of manganese oxides for binding other metals, these bacteria may also contribute to the immobilization and release of other metals in the environment.
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11
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Wang X, Müller WEG. Marine biominerals: perspectives and challenges for polymetallic nodules and crusts. Trends Biotechnol 2009; 27:375-83. [PMID: 19409632 DOI: 10.1016/j.tibtech.2009.03.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 03/08/2009] [Accepted: 03/13/2009] [Indexed: 11/29/2022]
Abstract
Deep sea minerals in polymetallic nodules, crusts and hydrothermal vents are not only formed by mineralization but also by biologically driven processes involving microorganisms (biomineralization). Within the nodules, free-living and biofilm-forming bacteria provide the matrix for manganese deposition, and in cobalt-rich crusts, coccolithophores represent the dominant organisms that act as bio-seeds for an initial manganese deposition. These (bio)minerals are economically important: manganese is an important alloying component and cobalt forms part of special steels in addition to being used, along with other rare metals, in plasma screens, hard-disk magnets and hybrid car motors. Recent progress in our understanding of the participation of the organic matrices in the enrichment of these metals might provide the basis for feasibility studies of biotechnological applications.
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Affiliation(s)
- Xiaohong Wang
- National Research Center for Geoanalysis, 26 Baiwanzhuang Dajie, CHN-100037 Beijing, China
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12
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Petkov V, Ren Y, Saratovsky I, Pastén P, Gurr SJ, Hayward MA, Poeppelmeier KR, Gaillard JF. Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnOx. ACS Nano 2009; 3:441-445. [PMID: 19236083 DOI: 10.1021/nn800653a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Biogenic materials are produced by microorganisms and are typically found in a nanophase state. As such, they are difficult to characterize structurally. In this report, we demonstrate how high-energy X-ray diffraction and atomic pair distribution function analysis can be used to determine the atomic-scale structures of MnO(x) produced by bacteria and fungi. These structures are well-defined, periodic, and species-specific, built of Mn-O(6) octahedra forming birnessite-type layers and todorokite-type tunnels, respectively. The inherent structural diversity of biogenic material may offer opportunities for practical applications.
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Affiliation(s)
- V Petkov
- Department of Physics, 203 Dow Science, Central Michigan University, Mt. Pleasant, Michigan 48859, USA.
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Sahabi DM, Takeda M, Suzuki I, Koizumi JI. Removal of Mn2+ from water by “aged” biofilter media: The role of catalytic oxides layers. J Biosci Bioeng 2009; 107:151-7. [DOI: 10.1016/j.jbiosc.2008.10.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Accepted: 10/14/2008] [Indexed: 11/28/2022]
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