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Shi M, Li Q, Wang Q, Yan X, Li B, Feng L, Wu C, Qiu R, Zhang H, Yang Z, Yang W, Liao Q, Chai L. A review on the transformation of birnessite in the environment: Implication for the stabilization of heavy metals. J Environ Sci (China) 2024; 139:496-515. [PMID: 38105072 DOI: 10.1016/j.jes.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/12/2023] [Accepted: 06/12/2023] [Indexed: 12/19/2023]
Abstract
Birnessite is ubiquitous in the natural environment where heavy metals are retained and easily transformed. The surface properties and structure of birnessite change with the changes in external environmental conditions, which also affects the fate of heavy metals. Clarifying the effect and mechanism of the birnessite phase transition process on heavy metals is the key to taking effective measures to prevent and control heavy metal pollution. Therefore, the four transformation pathways of birnessite are summarized first in this review. Second, the relationship between transformation pathways and environmental conditions is proposed. These relevant environmental conditions include abiotic (e.g., co-existing ions, pH, oxygen pressure, temperature, electric field, light, aging, pressure) and biotic factors (e.g., microorganisms, biomolecules). The phase transformation is achieved by the key intermediate of Mn(III) through interlayer-condensation, folding, neutralization-disproportionation, and dissolution-recrystallization mechanisms. The AOS (average oxidation state) of Mn and interlayer spacing are closely correlated with the phase transformation of birnessite. Last but not least, the mechanisms of heavy metals immobilization in the transformation process of birnessite are summed up. They involve isomorphous substitution, redox, complexation, hydration/dehydration, etc. The transformation of birnessite and its implication on heavy metals will be helpful for understanding and predicting the behavior of heavy metals and the crucial phase of manganese oxides/hydroxides in natural and engineered environments.
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Affiliation(s)
- Miao Shi
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Qingzhu Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China.
| | - Qingwei Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China.
| | - Xuelei Yan
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Bensheng Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Linhai Feng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Chao Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Rongrong Qiu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hongkai Zhang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhihui Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China
| | - Weichun Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China
| | - Qi Liao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410083, China
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2
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Li F, Yin H, Zhu T, Zhuang W. Understanding the role of manganese oxides in retaining harmful metals: Insights into oxidation and adsorption mechanisms at microstructure level. ECO-ENVIRONMENT & HEALTH (ONLINE) 2024; 3:89-106. [PMID: 38445215 PMCID: PMC10912526 DOI: 10.1016/j.eehl.2024.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/08/2024] [Indexed: 03/07/2024]
Abstract
The increasing intensity of human activities has led to a critical environmental challenge: widespread metal pollution. Manganese (Mn) oxides have emerged as potentially natural scavengers that perform crucial functions in the biogeochemical cycling of metal elements. Prior reviews have focused on the synthesis, characterization, and adsorption kinetics of Mn oxides, along with the transformation pathways of specific layered Mn oxides. This review conducts a meticulous investigation of the molecular-level adsorption and oxidation mechanisms of Mn oxides on hazardous metals, including adsorption patterns, coordination, adsorption sites, and redox processes. We also provide a comprehensive discussion of both internal factors (surface area, crystallinity, octahedral vacancy content in Mn oxides, and reactant concentration) and external factors (pH, presence of doped or pre-adsorbed metal ions) affecting the adsorption/oxidation of metals by Mn oxides. Additionally, we identify existing gaps in understanding these mechanisms and suggest avenues for future research. Our goal is to enhance knowledge of Mn oxides' regulatory roles in metal element translocation and transformation at the microstructure level, offering a framework for developing effective metal adsorbents and pollution control strategies.
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Affiliation(s)
- Feng Li
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
- Institute of Eco-environmental Forensics, Shandong University, Qingdao 266237, China
| | - Hui Yin
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Ministry of Ecology and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Tianqiang Zhu
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
- Institute of Eco-environmental Forensics, Shandong University, Qingdao 266237, China
| | - Wen Zhuang
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
- National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Institute of Eco-environmental Forensics, Shandong University, Qingdao 266237, China
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3
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Huang Y, Huangfu X, Ma C, Liu Z. Sequestration and oxidation of heavy metals mediated by Mn(II) oxidizing microorganisms in the aquatic environment. CHEMOSPHERE 2023; 329:138594. [PMID: 37030347 DOI: 10.1016/j.chemosphere.2023.138594] [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: 02/14/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 05/03/2023]
Abstract
Microorganisms can oxidize Mn(II) to biogenic Mn oxides (BioMnOx), through enzyme-mediated processes and non-enzyme-mediated processes, which are generally considered as the source and sink of heavy metals due to highly reactive to sequestrate and oxidize heavy metals. Hence, the summary of interactions between Mn(II) oxidizing microorganisms (MnOM) and heavy metals is benefit for further work on microbial-mediated self-purification of water bodies. This review comprehensively summarizes the interactions between MnOM and heavy metals. The processes of BioMnOx production by MnOM has been firstly discussed. Moreover, the interactions between BioMnOx and various heavy metals are critically discussed. On the one hand, modes for heavy metals adsorbed on BioMnOx are summarized, such as electrostatic attraction, oxidative precipitation, ion exchange, surface complexation, and autocatalytic oxidation. On the other hand, adsorption and oxidation of representative heavy metals based on BioMnOx/Mn(II) are also discussed. Thirdly, the interactions between MnOM and heavy metals are also focused on. Finally, several perspectives which will contribute to future research are proposed. This review provides insight into the sequestration and oxidation of heavy metals mediated by Mn(II) oxidizing microorganisms. It might be helpful to understand the geochemical fate of heavy metals in the aquatic environment and the process of microbial-mediated water self-purification.
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Affiliation(s)
- Yuheng Huang
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment, and Ecology, Chongqing University, Chongqing, 400044, China
| | - Xiaoliu Huangfu
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment, and Ecology, Chongqing University, Chongqing, 400044, China.
| | - Chengxue Ma
- State Key Laboratory of Urban Water Resource, and Environment, School of Municipal, and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China
| | - Ziqiang Liu
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment, and Ecology, Chongqing University, Chongqing, 400044, China
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4
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Xu T, Roepke EW, Flynn ED, Rosenfeld CE, Balgooyen S, Ginder-Vogel M, Schuler CJ, Santelli CM. Aqueous Co removal by mycogenic Mn oxides from simulated mining wastewaters. CHEMOSPHERE 2023; 327:138467. [PMID: 36966934 DOI: 10.1016/j.chemosphere.2023.138467] [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: 11/22/2022] [Revised: 03/05/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
Naturally occurring manganese (Mn) oxide minerals often form by microbial Mn(II) oxidation, resulting in nanocrystalline Mn(III/IV) oxide phases with high reactivity that can influence the uptake and release of many metals (e.g., Ni, Cu, Co, and Zn). During formation, the structure and composition of biogenic Mn oxides can be altered in the presence of other metals, which in turn affects the minerals' ability to bind these metals. These processes are further influenced by the chemistry of the aqueous environment and the type and physiology of microorganisms involved. Conditions extending to environments that typify mining and industrial wastewaters (e.g., increased salt content, low nutrient, and high metal concentrations) have not been well investigated thus limiting the understanding of metal interactions with biogenic Mn oxides. By integrating geochemistry, microscopic, and spectroscopic techniques, we examined the capacity of Mn oxides produced by the Mn(II)-oxidizing Ascomycete fungus Periconia sp. SMF1 isolated from the Minnesota Soudan Mine to remove the metal co-contaminant Co(II) from synthetic waters that are representative of mining wastewaters currently undergoing remediation efforts. We compared two different applied remediation strategies under the same conditions: coprecipitation of Co with mycogenic Mn oxides versus adsorption of Co with pre-formed fungal Mn oxides. Co(II) was effectively removed from solution by fungal Mn oxides through two different mechanisms: incorporation into, and adsorption onto, Mn oxides. These mechanisms were similar for both remediation strategies, indicating the general effectiveness of Co(II) removal by these oxides. The mycogenic Mn oxides were primarily a nanoparticulate, poorly-crystalline birnessite-like phases with slight differences depending on the chemical conditions during formation. The relatively fast and complete removal of aqueous Co(II) during biomineralization as well as the subsequent structural incorporation of Co into the Mn oxide structure illustrated a sustainable cycle capable of continuously remediating Co(II) from metal-polluted environments.
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Affiliation(s)
- Tingying Xu
- Department of Earth and Environmental Sciences, University of Minnesota - Twin Cities, Minneapolis, MN, 55455, USA; BioTechnology Institute, University of Minnesota - Twin Cities, Saint Paul, MN, 55108, USA.
| | - Elizabeth W Roepke
- Department of Earth and Environmental Sciences, University of Minnesota - Twin Cities, Minneapolis, MN, 55455, USA; BioTechnology Institute, University of Minnesota - Twin Cities, Saint Paul, MN, 55108, USA
| | - Elaine D Flynn
- Department of Earth and Planetary Sciences, Washington University, One Brookings Drive, Saint Louis, MO, 63130, USA
| | - Carla E Rosenfeld
- Section of Minerals and Earth Sciences, Carnegie Museum of Natural History, Pittsburgh, PA, 15213, USA
| | - Sarah Balgooyen
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
| | - Matthew Ginder-Vogel
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
| | - Christopher J Schuler
- Department of Earth and Environmental Sciences, University of Minnesota - Twin Cities, Minneapolis, MN, 55455, USA; BioTechnology Institute, University of Minnesota - Twin Cities, Saint Paul, MN, 55108, USA
| | - Cara M Santelli
- Department of Earth and Environmental Sciences, University of Minnesota - Twin Cities, Minneapolis, MN, 55455, USA; BioTechnology Institute, University of Minnesota - Twin Cities, Saint Paul, MN, 55108, USA
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5
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Hausladen DM, Peña J. Organic buffers act as reductants of abiotic and biogenic manganese oxides. Sci Rep 2023; 13:6498. [PMID: 37081009 PMCID: PMC10119380 DOI: 10.1038/s41598-023-32691-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 03/31/2023] [Indexed: 04/22/2023] Open
Abstract
Proton activity is the master variable in many biogeochemical reactions. To control pH, laboratory studies involving redox-sensitive minerals like manganese (Mn) oxides frequently use organic buffers (typically Good's buffers); however, two Good's buffers, HEPES and MES, have been shown to reduce Mn(IV) to Mn(III). Because Mn(III) strongly controls mineral reactivity, avoiding experimental artefacts that increase Mn(III) content is critical to avoid confounding results. Here, we quantified the extent of Mn reduction upon reaction between Mn oxides and several Good's buffers (MES, pKa = 6.10; PIPES, pKa = 6.76; MOPS, pKa = 7.28; HEPES, pKa = 7.48) and TRIS (pKa = 8.1) buffer. For δ-MnO2, Mn reduction was rapid, with up to 35% solid-phase Mn(III) generated within 1 h of reaction with Good's buffers; aqueous Mn was minimal in all Good's buffers experiments except those where pH was one unit below the buffer pKa and the reaction proceeded for 24 h. Additionally, the extent of Mn reduction after 24 h increased in the order MES < MOPS < PIPES < HEPES << TRIS. Of the variables tested, the initial Mn(II,III) content had the greatest effect on susceptibility to reduction, such that Mn reduction scaled inversely with the initial average oxidation number (AMON) of the oxide. For biogenic Mn oxides, which consist of a mixture of Mn oxides, bacterial cells and extracelluar polymeric substances, the extent of Mn reduction was lower than predicted from experiments using abiotic analogs and may result from biotic re-oxidation of reduced Mn or a difference in the reducibility of abiotic versus biogenic oxides. The results from this study show that organic buffers, including morpholinic and piperazinic Good's buffers and TRIS, should be avoided for pH control in Mn oxide systems due to their ability to transfer electrons to Mn, which modifies the composition and reactivity of these redox-active minerals.
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Affiliation(s)
- Debra M Hausladen
- Institute of Earth Surface Dynamics, University of Lausanne, 1015, Lausanne, Switzerland
- Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada
| | - Jasquelin Peña
- Institute of Earth Surface Dynamics, University of Lausanne, 1015, Lausanne, Switzerland.
- Department of Civil and Environmental Engineering, University of California, Davis, CA, 95616, USA.
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6
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Chen M, Wu J, Qiu X, Jiang L, Wu P. The important role of the interaction between manganese minerals and metals in environmental remediation: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:39319-39337. [PMID: 36740617 DOI: 10.1007/s11356-023-25575-8] [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: 09/14/2022] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
With illegal discharge of wastewater containing inorganic and organic pollutants, combined pollution is common and needs urgent attention. Understanding the migration and transformation laws of pollutants in the environment has important guiding significance for environmental remediation. Due to the characteristics of adsorption, oxidation, and catalysis, manganese minerals play important role in the environment fate of pollutants. This review summarizes the forms of interaction between manganese minerals and metals, the environmental importance of the interaction between manganese minerals and metals, and the contribution of this interaction in improving performance of Mn-based composite for environmental remediation. The literatures have indicated that the interactions between manganese minerals and metals involve in surface adsorption, lattice replacement, and formation of association minerals. The interaction between manganese minerals and metals plays an important role in environmental behavior of element and environmental significance of manganese minerals. The synergistic or antagonistic effect resulted from the interaction influence the purification of heavy metal and organism pollutant. The synergistic effect benefited from the coordination of adsorption and oxidation, convenient electron transfer, abundant oxygen vacancies, and fast migration of lattice oxygen. Based on the synergy, Mn-based composites have been widely used for environmental remediation. The synthesize methods of Mn-based composites mainly include homogeneous coprecipitation, chemical etching route, hydrothermal, homogeneous chelating sol-gel, and ethylene glycol reduction strategy. This review is helpful to fully understand the migration and transformation process of pollutants in the environment, expand the resource utilization of manganese minerals for environmental remediation.
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Affiliation(s)
- Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China.
| | - Jiayan Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
| | - Xiaoshan Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
| | - Lu Jiang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
- Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, People's Republic of China
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7
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Li Y, Liu Y, Feng L, Zhang L. A review: Manganese-driven bioprocess for simultaneous removal of nitrogen and organic contaminants from polluted waters. CHEMOSPHERE 2023; 314:137655. [PMID: 36603680 DOI: 10.1016/j.chemosphere.2022.137655] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/26/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
Water pollutants, such as nitrate and organics have received much attention for their harms to ecological environment and human health. The redox transformation between Mn(Ⅱ) and Mn(Ⅳ) for nitrogen and organics removal have been recognized for a long time. Mn(Ⅱ) can act as inorganic electron donor to drive autotrophic denitrification so as to realize simultaneous removal of Mn(Ⅱ), nitrate and organic pollutants. Mn oxides (MnOx) also play an important role in the adsorption and degradation of some organic contaminants and they can change or create new oxidation pathways in the nitrogen cycle. Herein, this paper provides a comprehensive review of nitrogen and organic contaminants removal pathways through applying Mn(Ⅱ) or MnOx as forerunners. The main current knowledge, developments and applications, pollutants removal efficiency, as well as microbiology and biochemistry mechanisms are summarized. Also reviewed the effects of factors such as the carbon source, the environmental factors and operation conditions have on the process. Research gaps and application potential are further proposed and discussed. Overall, Mn-based biotechnology towards advanced wastewater treatment has a promising prospect, which can achieve simultaneous removal of nitrogen and organic contaminants, and minimize sludge production.
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Affiliation(s)
- Yingying Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Yongze Liu
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Li Feng
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Liqiu Zhang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
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8
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Takeda A, Oki T, Yokoo H, Kawamoto K, Nakano Y, Ochiai A, Winarni ID, Kitahara M, Miyoshi K, Fukuyama K, Ohara Y, Yamaji K, Ohnuki T, Hochella MF, Utsunomiya S. Direct observation of Mn distribution/speciation within and surrounding a basidiomycete fungus in the production of Mn-oxides important in toxic element containment. CHEMOSPHERE 2023; 313:137526. [PMID: 36513194 DOI: 10.1016/j.chemosphere.2022.137526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Biogenic manganese (Mn) oxides occur ubiquitously in the environment including the uranium (U) mill tailings at the Ningyo-toge U mine in Okayama, Japan, being important in the sequestration of radioactive radium. To understand the nanoscale processes in Mn oxides formation at the U mill tailings site, Mn2+ absorption by a basidiomycete fungus, Coprinopsis urticicola, isolated from Ningyo-toge mine water samples, was investigated in the laboratory under controlled conditions utilizing electron microscopy, synchrotron-based X-ray analysis, and fluorescence microscopy with a molecular pH probe. The fungus' growth was first investigated in an agar-solidified medium supplemented with 1.0 mmol/L Mn2+, and Cu2+ (0-200 μM), Zn2+ (0-200 μM), or diphenyleneiodonium (DPI) chloride (0-100 μM) at 25 °C. The results revealed that Zn2+ has no significant effects on Mn oxide formation, whereas Cu2+ and DPI significantly inhibit both fungal growth and Mn oxidation, indicating superoxide-mediated Mn oxidation. Indeed, nitroblue tetrazolium and diaminobenzidine assays on the growing fungus revealed the production of superoxide and peroxide. During the interaction of Mn2+ with the fungus in solution medium at the initial pH of 5.67, a small fraction of Mn2+ infiltrated the fungal hyphae within 8 h, forming a few tens of nm-sized concentrates of soluble Mn2+ in the intracellular pH of ∼6.5. After 1 day of incubation, Mn oxides began to precipitate on the hyphae, which were characterized as fibrous nanocrystals with a hexagonal birnessite-structure, these forming spherical aggregates with a diameter of ∼1.5 μm. These nanoscale processes associated with the fungal species derived from the Ningyo-toge mine area provide additional insights into the existing mechanisms of Mn oxidation by filamentous fungi at other U mill tailings sites under circumneutral pH conditions. Such processes add to the class of reactions important to the sequestration of toxic elements.
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Affiliation(s)
- Ayaka Takeda
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takumi Oki
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiroki Yokoo
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Keisuke Kawamoto
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuriko Nakano
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Asumi Ochiai
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Ilma Dwi Winarni
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Mitsuki Kitahara
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kenta Miyoshi
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kenjin Fukuyama
- Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, 1550 Kamisaibara, Kagamino-cho, Tomata-gun, Okayama-ken, 708-0601, Japan
| | - Yoshiyuki Ohara
- Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, 1550 Kamisaibara, Kagamino-cho, Tomata-gun, Okayama-ken, 708-0601, Japan
| | - Keiko Yamaji
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, 305-8572, Japan
| | - Toshihiko Ohnuki
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Michael F Hochella
- Department of Geosciences, Virginia Tech, Blacksburg, VA, 24061, USA; Earth Systems Science Division, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Satoshi Utsunomiya
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
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9
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Li Q, Schild D, Pasturel M, Lützenkirchen J, Hanna K. Alteration of birnessite reactivity in dynamic anoxic/oxic environments. JOURNAL OF HAZARDOUS MATERIALS 2022; 433:128739. [PMID: 35366449 DOI: 10.1016/j.jhazmat.2022.128739] [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: 11/26/2021] [Revised: 01/20/2022] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Although the oxidative capacity of manganese oxides has been widely investigated, potential changes of the surface reactivity in dynamic anoxic/oxic environments have been often overlooked. In this study, we showed that the reactivity of layer structured manganese oxide (birnessite) was highly sensitive to variable redox conditions within environmentally relevant ranges of pH (4.0 - 8.0), ionic strength (0-100 mM NaCl) and Mn(II)/MnO2 molar ratio (0-0.58) using ofloxacine (OFL), a typical antibiotic, as a target contaminant. In oxic conditions, OFL removal was enhanced relative to anoxic environments under alkaline conditions. Surface-catalyzed oxidation of Mn(II) enabled the formation of more reactive Mn(III) sites for OFL oxidation. However, an increase in Mn(II)/MnO2 molar ratio suppressed MnO2 reactivity, probably because of competitive binding between Mn(II) and OFL and/or modification in MnO2 surface charge. Monovalent cations (e.g., Na+) may compensate the charge deficiency caused by the presence of Mn(III), and affect the aggregation of MnO2 particles, particularly under oxic conditions. An enhancement in the removal efficiency of OFL was then confirmed in the dynamic two-step anoxic/oxic process, which emulates oscillating redox conditions in environmental settings. These findings call for a thorough examination of the reactivity changes at environmental mineral surfaces (e.g., MnO2) in natural systems that may be subjected to alternation between anaerobic and oxygenated conditions.
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Affiliation(s)
- Qinzhi Li
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France
| | - Dieter Schild
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), P.O. 3640, D-76021 Karlsruhe, Germany
| | | | - Johannes Lützenkirchen
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), P.O. 3640, D-76021 Karlsruhe, Germany
| | - Khalil Hanna
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France; Institut Universitaire de France (IUF), MESRI, 1 rue Descartes, 75231 Paris, France.
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10
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Wang Z, Jia H, Zhao H, Zhang R, Zhang C, Zhu K, Guo X, Wang T, Zhu L. Oxygen Limitation Accelerates Regeneration of Active Sites on a MnO 2 Surface: Promoting Transformation of Organic Matter and Carbon Preservation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:9806-9815. [PMID: 35723552 DOI: 10.1021/acs.est.2c01868] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Birnessite (δ-MnO2) is a layered manganese oxide widely present in the environment and actively participates in the transformation of natural organic matter (NOM) in biogeochemical processes. However, the effect of oxygen on the dynamic interface processes of NOM and δ-MnO2 remains unclear. This study systematically investigated the interactions between δ-MnO2 and fulvic acid (FA) under both aerobic and anaerobic conditions. FA was transformed by δ-MnO2 via direct electron transfer and the generated reactive oxygen species (ROS). During the 32-day reaction, 79.8% of total organic carbon (TOC) in solution was removed under anaerobic conditions, unexpectedly higher than that under aerobic conditions (69.8%), suggesting that oxygen limitation was more conducive to the oxidative transformation of FA by δ-MnO2. The oxygen vacancies (OV) on the surface of δ-MnO2 were more exposed under anaerobic conditions, thus promoting the adsorption and transformation of FA as well as regeneration of the active sites. Additionally, the reaction of FA with δ-MnO2 weakened the strongly bonded lattice oxygen (Olatt), and the released Olatt was an important source of ROS. Interestingly, a part of organic carbon (OC) was preserved by forming MnCO3, which might be a novel mechanism for carbon preservation. These findings contribute to an improved understanding of the dynamic interface processes between MnO2 and NOM and provide new insights into the effects of oxygen limitation on the cycling and preservation of OC.
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Affiliation(s)
- Zhiqiang Wang
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Hanzhong Jia
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Haoran Zhao
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Ru Zhang
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Chi Zhang
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Kecheng Zhu
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Xuetao Guo
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Tiecheng Wang
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
| | - Lingyan Zhu
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, 3# Taicheng Road, Yangling 712100, P. R. China
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, P. R. China
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11
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Jiang L, Wu P, Xu Y, Li Y, Chen M, Ahmed Z, Zhu N. Impacts of ammonium ion on triclinic birnessites towards the transformation of As(III). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 298:118815. [PMID: 35007679 DOI: 10.1016/j.envpol.2022.118815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/20/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Triclinic birnessite (TB), a typical layered Mn oxide which is abundant naturally occurring minerals with a vital impact on the transformation of arsenite (As(III)) by adsorption and oxidation. As one of the most common critical metalloids, ammonium ion (NH4+) universally coexists with birnessite in marine, sediments or groundwater where are contaminated with As(III). In this study, we investigated the impacts of NH4+ on TB towards the transformation of As(III). Compared with the original TB (40.1%), the As(III) removal efficiencies of three different concentration (0.5 M, 1 M and 2 M) NH4+ impressed triclinic birnessite (TB-0.5 N, TB-1N and TB-2N) are increased rapidly in the order of: TB-2N (80.4%) > TB-1N (75.8%) > TB-0.5 N (71.5%). In addition, TB-2N exhibited the highest initial oxidation rate of 0.0031 min-1 which exceeds twice as much as this of TB (0.0014 min-1). And TB-2N could reach the max oxidation efficiency when the As concentration is 0.08 mM. Due to two different mechanisms of As(III) oxidation on birnessites under acidic and alkaline conditions, TB-2N showed a higher removal efficiency than TB at pH 3.0, 5.0, 7.0 and 9.0. Hence, there are two main reasons for the advanced As(III) oxidation capacity of TB-2N. One is the improvement of the average oxidation state of Mn, the other is the increase of oxygen vacancy with the coexistence of NH4+. Moreover, the larger specific surface area of TB-2N also contribute to enhancing As(III) oxidation capacity. This study holds a fundamental understanding of the behavior of triclinic birnessite which is coexisted with ammonium ion towards the transformation of As(III) in the environment.
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Affiliation(s)
- Lu Jiang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou, 510006, PR China.
| | - Yijing Xu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Yihao Li
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Zubair Ahmed
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
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12
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Liu X, Dong H, Hansel CM. Coupled Mn(II) and Cr(III) Oxidation Mediated by Ascomycete Fungi. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16236-16245. [PMID: 34825822 DOI: 10.1021/acs.est.1c05341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Manganese (Mn) oxides are considered as the primary oxidant of trivalent chromium [Cr(III)] in the environment. Microbial activities are responsible for the majority of Mn oxide formation in nature, thus likely influencing Cr(III) oxidation. Previous studies have been limited to Cr(III) oxidation by bacterial Mn oxides. Herein, we report coupled Mn(II) and Cr(III) oxidation in the presence of three Mn(II)-oxidizing Ascomycete fungi. In contrast to the previously reported inhibitory effect of Cr(III) on bacterial Mn(II) oxidation, varying effects of Cr(III) on fungal Mn(II) oxidation were observed, which may be linked to their Mn(II)-oxidation mechanisms. Under the concentrations of Mn(II) and Cr(III) applied in this study, Cr(III) promoted Mn(II) oxidation if it was mediated by hyphae-associated processes, but inhibited Mn(II) oxidation if it was achieved via extracellular enzymes/metabolites. The Cr(III) oxidation rate and extent were affected by Cr(III) speciation, Cr(VI) removal capacity (i.e., adsorption/reduction) of fungi, and organic content. The morphology and spatial relationship of Mn oxides with fungi varied, depending on fungal species and Cr(III) presence. Our findings highlight the importance of Mn(II)-oxidizing fungi in biogeochemical cycles of Mn and Cr and have significant implications for the origin of geogenic Cr(VI) and stability of reduced chromium in contaminated environments.
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Affiliation(s)
- Xiaolei Liu
- School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China
- Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China
| | - Hailiang Dong
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China
| | - Colleen M Hansel
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States
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13
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Jia D, Li Q, Luo T, Monfort O, Mailhot G, Brigante M, Hanna K. Impacts of environmental levels of hydrogen peroxide and oxyanions on the redox activity of MnO 2 particles. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2021; 23:1351-1361. [PMID: 34350930 DOI: 10.1039/d1em00177a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Despite the widespread presence of hydrogen peroxide (H2O2) in surface water and groundwater systems, little is known about the impact of environmental levels of H2O2 on the redox activity of minerals. Here we demonstrate that environmental concentrations of H2O2 can alter the reactivity of birnessite-type manganese oxide, an earth-abundant functional material, and decrease its oxidative activity in natural systems across a wide range of pH values (4-8). The H2O2-induced reductive dissolution generates Mn(II) that will re-bind to MnO2 surfaces, thereby affecting the surface charge of MnO2. Competition of Bisphenol A (BPA), used as a target compound here, and Mn(II) to interact with reactive surface sites may cause suppression of the oxidative ability of MnO2. This suppressive effect becomes more effective in the presence of oxyanions such as phosphate or silicate at concentrations comparable to those encountered in natural waters. Unlike nitrate, adsorption of phosphate or silicate onto birnessite increased in the presence of Mn(II) added or generated through H2O2-induced reduction of MnO2. This suggests that naturally occurring anions and H2O2 may have synergetic effects on the reactivity of birnessite-type manganese oxide at a range of environmentally relevant H2O2 amounts. As layered structure manganese oxides play a key role in the global carbon cycle as well as pollutant dynamics, the impact of environmental levels of hydrogen peroxide (H2O2/MnO2 molar ratio ≤ 0.3) should be considered in environmental fate and transport models.
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Affiliation(s)
- Daqing Jia
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Qinzhi Li
- Univ. Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France.
| | - Tao Luo
- Univ. Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France.
| | - Olivier Monfort
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Inorganic Chemistry, Ilkovicova 6, Mlynska Dolina, 842 15 Bratislava, Slovakia
| | - Gilles Mailhot
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Marcello Brigante
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Khalil Hanna
- Univ. Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France.
- Institut Universitaire de France (IUF), MESRI, 1 Rue Descartes, 75231 Paris, France
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14
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Abernathy MJ, Schaefer MV, Vessey CJ, Liu H, Ying SC. Oxidation of V(IV) by Birnessite: Kinetics and Surface Complexation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11703-11712. [PMID: 34488349 DOI: 10.1021/acs.est.1c02464] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Vanadium is a redox-active metal that has been added to the EPA's Contaminant Candidate List with a notification level of 50 μg L-1 due to mounting evidence that VV exposure can lead to adverse health outcomes. Groundwater V concentration exceeds the notification level in many locations, yet geochemical controls on its mobility are poorly understood. Here, we examined the redox interaction between VIV and birnessite (MnO2), a well-characterized oxidant and a scavenger of many trace metals. In our findings, birnessite quickly oxidized sparingly soluble VIV species such as häggite [V2O3(OH)2] into highly mobile and toxic vanadate (HnVO4(3-n)-) in continuously stirred batch reactors under neutral pH conditions. Synchrotron X-ray absorption spectroscopic (XAS) analysis of in situ and ex situ experiments showed that oxidation of VIV occurs in two stages, which are both rapid relative to the measured dissolution rate of the VIV solid. Concomitantly, the reduction of birnessite during VIV oxidation generated soluble MnII, which led to the formation of the MnIII oxyhydroxide feitknechtite (β-MnOOH) upon back-reaction with birnessite. XAS analysis confirmed a bidentate-mononuclear edge-sharing complex formed between VV and birnessite, although retention of VV was minimal relative to the aqueous quantities generated. In summary, we demonstrate that Mn oxides are effective oxidants of VIV in the environment with the potential to increase dissolved V concentrations in aquifers subject to redox oscillations.
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Affiliation(s)
- Macon J Abernathy
- Environmental Toxicology Program, University of California-Riverside, Riverside, California 92521, United States
| | - Michael V Schaefer
- Department of Environmental Science, University of California-Riverside, Riverside, California 92521, United States
- Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, United States
| | - Colton J Vessey
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
| | - Haizhou Liu
- Environmental Toxicology Program, University of California-Riverside, Riverside, California 92521, United States
- Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, California 92521, United States
| | - Samantha C Ying
- Environmental Toxicology Program, University of California-Riverside, Riverside, California 92521, United States
- Department of Environmental Science, University of California-Riverside, Riverside, California 92521, United States
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15
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Soldatova AV, Fu W, Romano CA, Tao L, Casey WH, Britt RD, Tebo BM, Spiro TG. Metallo-inhibition of Mnx, a bacterial manganese multicopper oxidase complex. J Inorg Biochem 2021; 224:111547. [PMID: 34403930 DOI: 10.1016/j.jinorgbio.2021.111547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 11/29/2022]
Abstract
The manganese oxidase complex, Mnx, from Bacillus sp. PL-12 contains a multicopper oxidase (MCO) and oxidizes dissolved Mn(II) to form insoluble manganese oxide (MnO2) mineral. Previous kinetic and spectroscopic analyses have shown that the enzyme's mechanism proceeds through an activation step that facilitates formation of a series of binuclear Mn complexes in the oxidation states II, III, and IV on the path to MnO2 formation. We now demonstrate that the enzyme is inhibited by first-row transition metals in the order of the Irving-Williams series. Zn(II) strongly (Ki ~ 1.5 μM) inhibits both activation and turnover steps, as well as the rate of Mn(II) binding. The combined Zn(II) and Mn(II) concentration dependence establishes that the inhibition is non-competitive. This result is supported by electron paramagnetic resonance (EPR) spectroscopy, which reveals unaltered Mnx-bound Mn(II) EPR signals, both mono- and binuclear, in the presence of Zn(II). We infer that inhibitory metals bind at a site separate from the substrate sites and block the conformation change required to activate the enzyme, a case of allosteric inhibition. The likely biological role of this inhibitory site is discussed in the context of Bacillus spore physiology. While Cu(II) inhibits Mnx strongly, in accord with the Irving-Williams series, it increases Mnx activation at low concentrations, suggesting that weakly bound Cu, in addition to the four canonical MCO-Cu, may support enzyme activity, perhaps as an electron transfer agent.
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Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Wen Fu
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Christine A Romano
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon 97239, United States
| | - Lizhi Tao
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - William H Casey
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States; Earth and Planetary Sciences Department, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - R David Britt
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon 97239, United States
| | - Thomas G Spiro
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States.
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16
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Liu J, Feng L, Wu Y. Enzymatically synthesised MnO 2 nanoparticles for efficient near-infrared photothermal therapy and dual-responsive magnetic resonance imaging. NANOSCALE 2021; 13:11093-11103. [PMID: 34113941 DOI: 10.1039/d1nr02400k] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Manganese dioxide (MnO2) nanoparticles (NPs) are highly attractive for biomedical applications due to their biocompatibility, stimuli-responsive magnetic resonance imaging (MRI) properties and capability to modulate the hypoxic tumour microenvironment (TME). However, conventional MnO2 NPs do not possess photothermal therapy (PTT) functions except for hybrids with other photothermal materials. Herein, we first reveal the extraordinary photothermal conversion efficiency (44%) of enzymatically synthesised MnO2 NPs (Bio-MnO2 NPs), which are distinct from chemically synthesised MnO2 NPs. In addition, the Bio-MnO2 NPs revealed high thermal recycling stability and solubility as well as dual pH- and reduction-responsive MRI enhancement for tumour theragnosis. These NPs were prepared through a facile MnxEFG enzyme-mediated biomineralization process. The MnxEFG complex from Bacillus sp. PL-12 is the only manganese mineralization enzyme that could be heterologously overexpressed in its active form to achieve Bio-MnO2 NPs without a bacterial host. The hexagonal layer symmetry of the Bio-MnO2 NPs is the key feature facilitating the high photothermal conversion efficiency and TME-responsive T1-weighted MRI. Evaluations both in vitro at the cellular level and in vivo in a systematic tumour-bearing mouse xenograft model demonstrated the high photothermal ablation efficacy of the Bio-MnO2 NPs, which achieved complete tumour eradication with high therapeutic biosafety without obvious reoccurrence. Moreover, stimuli-responsive MR enhancement potentially allows imaging-guided precision PTT. With their excellent biocompatibility, mild synthesis conditions and relatively simple composition, Bio-MnO2 NPs hold great translational promise.
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Affiliation(s)
- Jin Liu
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Liandong Feng
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yuzhou Wu
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan 430074, China.
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17
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Liu J, Gu T, Sun X, Li L, Xiao F, Wang Z, Li L. Synthesis of MnO/C/Co 3O 4 nanocomposites by a Mn 2+-oxidizing bacterium as a biotemplate for lithium-ion batteries. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2021; 22:429-440. [PMID: 34121929 PMCID: PMC8183561 DOI: 10.1080/14686996.2021.1927175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The biotemplate and bioconversion strategy represents a sustainable and environmentally friendly approach to material manufacturing. In the current study, biogenic manganese oxide aggregates of the Mn2+-oxidizing bacterium Pseudomonas sp. T34 were used as a precursor to synthesize a biocomposite that incorporated Co (CMC-Co) under mild shake-flask conditions based on the biomineralization process of biogenic Mn oxides and the characteristics of metal ion subsidies. X-ray photoelectron spectroscopy, phase composition and fine structure analyses demonstrated that hollow MnO/C/Co3O4 multiphase composites were fabricated after high-temperature annealing of the biocomposites at 800°C. The cycling and rate performance of the prepared anode materials for lithium-ion batteries were compared. Due to the unique hollow structure and multiphasic state, the reversible discharge capacity of CMC-Co remained at 650 mAh g-1 after 50 cycles at a current density of 0.1 Ag-1, and the coulombic efficiency remained above 99% after the second cycle, indicating a good application potential as an anode material for lithium-ion batteries.
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Affiliation(s)
- Jin Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Tong Gu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Xiaowen Sun
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Li Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Fan Xiao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Zhiyong Wang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Lin Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
- CONTACT Lin Li State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan430070, China
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18
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Golovanov IS, Malykhin RS, Lesnikov VK, Nelyubina YV, Novikov VV, Frolov KV, Stadnichenko AI, Tretyakov EV, Ioffe SL, Sukhorukov AY. Revealing the Structure of Transition Metal Complexes of Formaldoxime. Inorg Chem 2021; 60:5523-5537. [PMID: 33826845 DOI: 10.1021/acs.inorgchem.0c03362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aerobic reactions of iron(III), nickel(II), and manganese(II) chlorides with formaldoxime cyclotrimer (tfoH3) and 1,4,7-triazacyclononane (tacn) produce indefinitely stable complexes of general formula [M(tacn)(tfo)]Cl. Although the formation of formaldoxime complexes has been known since the end of 19th century and applied in spectrophotometric determination of d-metals (formaldoxime method), the structure of these coordination compounds remained elusive until now. According to the X-ray analysis, [M(tacn)(tfo)]+ cation has a distorted adamantane-like structure with the metal ion being coordinated by three oxygen atoms of deprotonated tfoH3 ligand. The metal has a formal +4 oxidation state, which is atypical for organic complexes of iron and nickel. Electronic structure of [M(tacn)(tfo)]+ cations was studied by XPS, NMR, cyclic (CV) and differential pulse (DPV) voltammetries, Mössbauer spectroscopy, and DFT calculations. Unusual stabilization of high-valent metal ion by tfo3- ligand was explained by the donation of electron density from the nitrogen atom to the antibonding orbital of the metal-oxygen bond via hyperconjugation as confirmed by the NBO analysis. All complexes [M(tacn)(tfo)]Cl exhibited high catalytic activity in the aerobic dehydrogenative dimerization of p-thiocresol under ambient conditions.
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Affiliation(s)
- Ivan S Golovanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Roman S Malykhin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Vladislav K Lesnikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, Russia, 119991
| | - Valentin V Novikov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, Russia, 119991
| | - Kirill V Frolov
- Shubnikov Institute of Crystallography of FSRC "Crystallography and Photonics," Russian Academy of Sciences, Leninsky prospect, 59, Moscow, Russia, 119991
| | - Andrey I Stadnichenko
- Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, 5 Ac. Lavrentiev Avenue, Novosibirsk, Russia, 630090
| | - Evgeny V Tretyakov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow, Russia, 119991.,Plekhanov Russian University of Economics, Stremyanny per. 36, Moscow, Russia, 117997
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Yu L, Li Y, Ruan Y. Fe-Mn Oxides Based Multifunctional Adsorptive/Electrosensing Nanoplatforms: Dynamic Site Rearrangement for Metal Ion Selectivity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3967-3975. [PMID: 33635053 DOI: 10.1021/acs.est.0c07733] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Achieving structural requirements for the exclusive selectivity of adsorbent to a specific metal remains challenging, as certain metal ions show similar adsorptive behaviors and preference toward a given site. We reported the morphology and oxidation state-dependent selectivity manipulating of layered oxides by controlling the dynamic evolution of different adsorptive sites. The computational investigation predicted the site-specific partitioning trends of metal ions at two sites of manganese oxide (MnO2) layers: the lateral edge sites (LESs) and octahedral vacancy sites (OVSs). In contrast to the predominant occupation of the OVSs for other metal ions, the binding of lead (Pb) ions was energetically favored at both the sites. We assembled ultrathin MnO2 nanosheets on the magnetic iron oxides to first enhance the accessibility of the LESs. A sequential ligand-promoted partial reduction of the atomic MnO2 layers induced the edge-to-interlayer migration of Mn atoms to block the nonspecific OVSs and activate the LESs, enabling a superior selectivity to Pb. In addition, the iron oxides helped construct a multifunctional adsorptive/electrosensing platform for Pb regarding their facile magnetic separation and electrochemical activity. Simultaneous selective adsorption and on-site monitoring of Pb(II) were achieved on this nanoplatform, owing to its satisfactory stability and sensitivity without an obvious matrix effect.
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Affiliation(s)
- Li Yu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, People's Republic of China
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Yuchan Li
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, People's Republic of China
| | - Yuefei Ruan
- State Key Laboratory of Marine Pollution, Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR, People's Republic of China
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Yang P, Wen K, Beyer KA, Xu W, Wang Q, Ma D, Wu J, Zhu M. Inhibition of Oxyanions on Redox-driven Transformation of Layered Manganese Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3419-3429. [PMID: 33600156 DOI: 10.1021/acs.est.0c06310] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Layered manganese (Mn) oxides, such as birnessite, can reductively transform into other phases and thereby affect the environmental behavior of Mn oxides. Solution chemistry strongly influences the transformation, but the effects of oxyanions remain unknown. We determined the products and rates of Mn(II)-driven reductive transformation of δ-MnO2, a nanoparticulate hexagonal birnessite, in the presence of phosphate or silicate at pH 6-8 and a wide range of Mn(II)/MnO2 molar ratios. Without the oxyanions, δ-MnO2 transforms into triclinic birnessite (T-bir) and 4 × 4 tunneled Mn oxide (TMO) at low Mn(II)/MnO2 ratios (0.09 and 0.13) and into δ-MnOOH and Mn3O4 with minor poorly crystallized α- and γ-MnOOH at high Mn(II)/MnO2 ratios (0.5 and 1). The presence of phosphate or silicate substantially decreases the rate and extent of the above transformation, probably due to adsorption of the oxyanions on layer edges or the formation of Mn(II,III)-oxyanion ternary complexes on vacancies of δ-MnO2, adversely interfering with electron transfer, Mn(III) distribution, and structural rearrangements. The oxyanions also reduce the crystallinity and particle sizes of the transformation products, ascribed to adsorption of the oxyanions on the products, preventing their further particle growth. This study enriches our understanding of the solution chemistry control on redox-driven transformation of Mn oxides.
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Affiliation(s)
- Peng Yang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Ke Wen
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Kevin A Beyer
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wenqian Xu
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Qian Wang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Dong Ma
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Resource and Environment, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Juan Wu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Resource and Environment, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
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21
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Queiroz HM, Ying SC, Abernathy M, Barcellos D, Gabriel FA, Otero XL, Nóbrega GN, Bernardino AF, Ferreira TO. Manganese: The overlooked contaminant in the world largest mine tailings dam collapse. ENVIRONMENT INTERNATIONAL 2021; 146:106284. [PMID: 33264733 PMCID: PMC8382573 DOI: 10.1016/j.envint.2020.106284] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 05/11/2023]
Abstract
Manganese (Mn) is an abundant element in terrestrial and coastal ecosystems and an essential micronutrient in the metabolic processes of plants and animals. Mn is generally not considered a potentially toxic element due to its low content in both soil and water. However, in coastal ecosystems, the Mn dynamic (commonly associated with the Fe cycle) is mostly controlled by redox processes. Here, we assessed the potential contamination of the Rio Doce estuary (SE Brazil) by Mn after the world's largest mine tailings dam collapse, potentially resulting in chronic exposure to local wildlife and humans. Estuarine soils, water, and fish were collected and analyzed seven days after the arrival of the tailings in 2015 and again two years after the dam collapse in 2017. Using a suite of solid-phase analyses including X-ray absorption spectroscopy and sequential extractions, our results indicated that a large quantity of MnII arrived in the estuary in 2015 bound to Fe oxyhydroxides. Over time, dissolved Mn and Fe were released from soils when FeIII oxyhydroxides underwent reductive dissolution. Due to seasonal redox oscillations, both Fe and Mn were then re-oxidized to FeIII, MnIII, and MnIV and re-precipitated as poorly crystalline Fe oxyhydroxides and poorly crystalline Mn oxides. In 2017, redox conditions (Eh: -47 ± 83 mV; pH: 6.7 ± 0.5) favorable to both Fe and Mn reduction led to an increase (~880%) of dissolved Mn (average for 2015: 66 ± 130 µg L-1; 2017: 582 ± 626 µg L-1) in water and a decrease (~75%, 2015: 547 ± 498 mg kg-1; 2017: 135 ± 80 mg kg-1) in the total Mn content in soils. The crystalline Fe oxyhydroxides content significantly decreased while the fraction of poorly ordered Fe oxides increased in the soils limiting the role of Fe in Mn retention. The high concentration of dissolved Mn found within the estuary two years after the arrival of mine tailings indicates a possible chronic contamination scenario, which is supported by the high levels of Mn in two species of fish living in the estuary. Our work suggests a high risk to estuarine biota and human health due to the rapid Fe and Mn biogeochemical dynamic within the impacted estuary.
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Affiliation(s)
- Hermano M Queiroz
- Luiz de Queiroz College of Agriculture, University of São Paulo (ESALQ-USP), Av. Pádua Dias 11, CEP 13418-900, Piracicaba, São Paulo, Brazil
| | - Samantha C Ying
- Environmental Toxicology Graduate Program, University of California, Riverside, CA 92521, United States; Department of Environmental Sciences, University of California, Riverside, CA, 92521, United States
| | - Macon Abernathy
- Environmental Toxicology Graduate Program, University of California, Riverside, CA 92521, United States
| | - Diego Barcellos
- Luiz de Queiroz College of Agriculture, University of São Paulo (ESALQ-USP), Av. Pádua Dias 11, CEP 13418-900, Piracicaba, São Paulo, Brazil
| | - Fabricio A Gabriel
- Grupo de Ecologia Bentônica, Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, Espírito Santo 29075-910, Brazil
| | - Xosé L Otero
- Department of Edaphology and Agricultural Chemistry - CRETUS, Faculty of Biology, Universidade de Santiago de Compostela, Campus Sur, 15782, Santiago de Compostela, Spain
| | - Gabriel N Nóbrega
- Graduate Program in Earth Sciences (Geochemistry), Department of Geochemistry, Federal Fluminense University, Niterói, Brazil
| | - Angelo F Bernardino
- Grupo de Ecologia Bentônica, Departamento de Oceanografia, Universidade Federal do Espírito Santo, Vitória, Espírito Santo 29075-910, Brazil
| | - Tiago O Ferreira
- Luiz de Queiroz College of Agriculture, University of São Paulo (ESALQ-USP), Av. Pádua Dias 11, CEP 13418-900, Piracicaba, São Paulo, Brazil.
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Liang M, Guo H, Xiu W. Arsenite oxidation and arsenic adsorption on birnessite in the absence and the presence of citrate or EDTA. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43769-43785. [PMID: 32740840 DOI: 10.1007/s11356-020-10292-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Birnessite not only oxidizes arsenite into arsenate but also interacts with organic matter in various ways. However, effects of organic matter on interaction between As and birnessite remain unclear. This study investigated effects of citrate and EDTA (3.12 and 2.05 mM, respectively) on oxidation of As(III) (1.07 mM) and adsorption of As(V) (0.67 mM) on birnessite (5.19 mM as Mn) at near-neutral pH. We found that As(V) adsorption on birnessite was enhanced by citrate and EDTA, which resulted from the increase in active adsorption sites via dissolution of birnessite. In comparison with citrate batches, more As was adsorbed on birnessite in EDTA batches, where dissolved Mn was mainly presented as Mn(III)-EDTA complex. Citrate or EDTA-induced dissolution of birnessite did not decrease the As(III) oxidation rate in the initial stage where As(III) oxidation rate was rapid. Afterwards, As(III) oxidation was conspicuously suppressed in citrate-amended batches, which was mainly attributed to the decrease in adsorption sites by adsorption of citrate/Mn(II)-citrate complex. This suppression was enhanced by the increase in concentrations of dissolved Mn(II). Citrate inhibited As adsorption after As(III) oxidation due to the strong competitive adsorption of citrate/Mn(II)-citrate complex. However, the As(III) oxidation rate was increased in EDTA-amended batches in the late stage, which mainly derived from the increase in the active sites via birnessite dissolution. The strong complexation ability of EDTA led to formation of Mn(III)-EDTA complex. Arsenic adsorption was not affected due to the limited competitive adsorption of the complex on the solid. This work reveals the critical role of low molecular weight organic acids in geochemical behaviors of As and Mn in aqueous environment.
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Affiliation(s)
- Mengyu Liang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, People's Republic of China
- MOE Key Laboratory of Groundwater Circulation & Environment Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Huaming Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, People's Republic of China.
- MOE Key Laboratory of Groundwater Circulation & Environment Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
| | - Wei Xiu
- Institute of Geosciences, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
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23
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Sun Q, Cui P, Wu S, Liu C, Fan T, Alves ME, Cheng H, Huang M, Zhou D, Wang Y. Role of Reduced Sulfur in the Transformation of Cd(II) Immobilized by δ-MnO 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:14955-14963. [PMID: 33175488 DOI: 10.1021/acs.est.0c02936] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mn oxides are the major sinks for Cd(II) in the aquatic environment. At the redox interface, reduced sulfur might affect the fate of sorbed Cd(II) by either reducing Mn oxides or forming strong complexes with Cd(II). Here, we investigated the fate of Cd(II) immobilized on δ-MnO2 affected by reduced sulfur (S2- and cysteine). A low concentration of S2- led to Cd(II) migration from vacant sites to edge sites, while a high concentration of S2- largely converted Cd(II) adsorbed on the surface of δ-MnO2 to CdS. At low pH, the cysteine addition led to the release of Cd(II) initially adsorbed at the δ-MnO2 vacant sites into the solution and caused the migration of a small portion of Cd(II) to the δ-MnO2 edge sites. At high pH, a high concentration of cysteine led to the detachment of Cd(II) from δ-MnO2, Cd(II) readsorption by Mn(III)-bearing minerals, and Cd-cysteine formation. Changes of Cd(II) speciation were caused by δ-MnO2 dissolution induced by reduced sulfur, the competition of generated Mn(II/III) for the adsorption sites, and the precipitation of Cd(II) with reduced sulfur. This study indicates that reduced sulfur is a critical factor controlling the fate of Cd(II) immobilized on Mn oxides in the aquatic environment.
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Affiliation(s)
- Qian Sun
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peixin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
| | - Song Wu
- State Key Laboratory of Pollution Control and Resource Research, School of Environment, Nanjing University, Nanjing 210008, China
| | - Cun Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
| | - Tingting Fan
- Ministry of Environmental Protection of the People's Republic of China, Nanjing Institute of Environmental Sciences, Nanjing 210008, China
| | - Marcelo Eduardo Alves
- Department of Exact Sciences "Luiz de Queiroz" Agricultural College, ESALQ/USP, Piracicaba, São Paulo 13418-900, Brazil
| | - Hu Cheng
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Meiying Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
| | - Yujun Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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24
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Balgooyen S, Remucal CK, Ginder-Vogel M. Identifying the mechanisms of cation inhibition of phenol oxidation by acid birnessite. JOURNAL OF ENVIRONMENTAL QUALITY 2020; 49:1644-1654. [PMID: 33459423 DOI: 10.1002/jeq2.20144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/31/2020] [Accepted: 08/07/2020] [Indexed: 06/12/2023]
Abstract
Many phenolic compounds found as contaminants in natural waters are susceptible to oxidation by manganese oxides. However, there is often variability between oxidation rates reported in pristine matrices and studies using more environmentally relevant conditions. For example, the presence of cations generally results in slower phenolic oxidation rates. However, the underlying mechanism of cation interference is not well understood. In this study, cation co-solutes inhibit the transformation of four target phenols (bisphenol A, estrone, p-cresol, and triclosan) by acid birnessite. Oxidation rates for these compounds by acid birnessite follow the same trend (Na+ > K+ > Mg2+ > Ca2+) when cations are present as co-solutes. We further demonstrate that the same trend applies to these cations when they are absent from solution but pre-exchanged with the mineral. We analyze valence state, surface area, crystallinity, and zeta potential to characterize changes in oxide structure. The findings of this study show that pre-exchanged cations have a large effect on birnessite reactivity even in the absence of cation co-solutes, indicating that the inhibition of phenolic compound oxidation is not due to competition for surface sites, as previously suggested. Instead, the reaction inhibition is attributed to changes in aggregation and the mineral microstructure.
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Affiliation(s)
- Sarah Balgooyen
- Environmental Chemistry and Technology Program, Univ. of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
| | - Christina K Remucal
- Environmental Chemistry and Technology Program, Univ. of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
- Dep. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
| | - Matthew Ginder-Vogel
- Environmental Chemistry and Technology Program, Univ. of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
- Dep. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 660 N. Park St., Madison, WI, 53706, USA
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25
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Pokharel R, Li Q, Zhou L, Hanna K. Water Flow and Dissolved Mn II Alter Transformation of Pipemidic Acid by Manganese Oxide. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8051-8060. [PMID: 32470299 DOI: 10.1021/acs.est.0c01474] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Manganese oxides have been proposed as promising geomedia to remove trace organic contaminants in both natural soils and artificial infiltration systems. Although MnOx-based redox processes have been largely investigated, little is known on the effects of water flow and dissolved MnII on manganese-mediated redox reactions in saturated porous media. Here, we have demonstrated that the reactive transport of a widely used quinolone antibiotic, pipemidic acid (PIP), in MnO2-coated sand (MCS) columns is altered by the presence of dissolved MnII, generated in situ as reduced ions or present in inflow solution. Decreasing the flow rate or flow interruption facilitated oxidation reactions and generated redox byproducts (MnII and PIPox). However, preloading of MCS columns with dissolved MnII led to suppressed reactivity with PIP. When PIP and MnII are simultaneously injected, competition between PIP and MnII for binding at the edge sites takes place during the initial kinetic phase of reaction, while at a later breakthrough time MnII will occupy both edge and vacancy sites due to the continuous supply of MnII. We also developed a reactive transport model that accounts for adsorption kinetics to predict changes in transport behavior of antibiotics in the presence of different doses of dissolved MnII. This work has strong implications for an accurate assessment of the reactivity of manganese oxides used as engineered geomedia for quinolone remediation and in developing transport models of antibiotics in natural systems.
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Affiliation(s)
- Rasesh Pokharel
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Qinzhi Li
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Lian Zhou
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Khalil Hanna
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
- Institut Universitaire de France (IUF), MESRI, 1 rue Descartes, 75231 Paris, France
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Li G, Pan W, Zhang L, Wang Z, Shi B, Giammar DE. Effect of Cu(II) on Mn(II) Oxidation by Free Chlorine To Form Mn Oxides at Drinking Water Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:1963-1972. [PMID: 31935075 DOI: 10.1021/acs.est.9b06497] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The chemical oxidation of dissolved Mn(II) to Mn(III/IV) oxides (MnOx) can lead to the accumulation of Mn deposits in drinking water distribution systems. However, Mn(II) oxidation by free chlorine is quite slow under mild conditions (e.g., pH 7.7 and 1.0 mg/L Cl2). This study found a significant role for Cu(II) in Mn(II) oxidation under conditions relevant to the supply of chlorinated drinking water. At pH 7.7, dissolved Cu(II) accelerated Mn(II) oxidation more than 10 times with a dose of 20 μg/L. Solid characterization revealed that during Mn(II) oxidation, Cu(II) adsorbed to freshly formed MnOx and produced Mn-Cu mixtures (denoted as MnOx-Cu(II)). An autocatalytic model for the reaction kinetics suggested that the freshly formed MnOx-Cu(II) had a much higher catalytic activity than that of pure MnOx. Solid CuO also catalyzed Mn(II) oxidation, and kinetic modeling indicated that after an initial oxidation of Mn(II) facilitated by the CuO surface, the freshly formed MnOx-Cu(II) on CuO surface played the dominant role in accelerating further Mn(II) oxidation. This study indicates a high potential for the formation of Mn oxides at locations in a drinking water distribution system or in premise plumbing where both Mn(II) and Cu(II) are available. It provides insights into the co-occurrence of other metals with Mn deposits that is frequently observed in distribution systems.
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Affiliation(s)
- Guiwei Li
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
- Department of Energy, Environmental and Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri 63130 , United States
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Weiyi Pan
- Department of Energy, Environmental and Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri 63130 , United States
| | - Lili Zhang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
| | - Ziqiao Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
| | - Baoyou Shi
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - 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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Yin H, Sun J, Yan X, Yang X, Feng X, Tan W, Qiu G, Zhang J, Ginder-Vogel M, Liu F. Effects of Co(II) ion exchange, Ni(II)- and V(V)-doping on the transformation behaviors of Cr(III) on hexagonal turbostratic birnessite-water interfaces. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 256:113462. [PMID: 31706772 DOI: 10.1016/j.envpol.2019.113462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/19/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Natural birnessite-like minerals are commonly enriched in various transitional metals (TMs), which greatly modify the mineral structure and properties. However few studies are yet conducted systematically on the effects of TM doping on birnessite reactivity towards Cr(III) oxidation. In the present study, the transformation behaviors of Cr(III) on Co-, Ni-, V-containing birnessites were investigated. Co and Ni doping generally decrease the mineral crystalline sizes and hydrodynamic sizes (DH) while V-doping greatly decreases the crystalline sizes but not the DH, owing to particle aggregation. Co and Ni firstly decrease and then increase the mineral zeta potentials (ζ) at pH4 while V decreases ζ. Electrochemical specific capacitances for Co-containing birnessites are gradually reduced, while those for Ni-doped birnessites are slightly reduced and for V-doped birnessites increased, which have a positively linear relationship with the amounts of Cr(III) oxidized by these samples. Cr(III) removal efficiencies from solution by these Co-, Ni- and V-containing birnessites are 26-51%, ∼62-72% and ∼96-100%, respectively, compared to ∼92% by pure birnessite. Cr(III) oxidation kinetics analysis demonstrates the gradual decrease of Mn(IV) and concurrent increase of Mn(III) and the adsorption of mainly Cr(III) on mineral surfaces. A negatively linear relationship exists between birnessite lateral sizes and the proportions of Mn(IV/III) consumed to oxidize Cr(III). Apparent initial Cr(III) oxidation rate (kobs) for Co-containing birnessites are greatly reduced, while those for Ni-doped samples moderately decreased and for V-doped samples first increased and then decreased. A positively or negatively linear relationship exists between kobs or the amount of Mn(II) released and the mineral Mn(IV) content respectively. Cr(III) oxidation probably initiates from layer edge sites of Ni-doped birnessites but the vacancies of Co- and V-containing birnessites. These results provide insights into the reaction mechanisms of Cr(III) with natural birnessite-like minerals.
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Affiliation(s)
- Hui Yin
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; Department of Civil & Environmental Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Jiewei Sun
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinran Yan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiong Yang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xionghan Feng
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenfeng Tan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Guohong Qiu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
| | - Matthew Ginder-Vogel
- Department of Civil & Environmental Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Fan Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
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28
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Sun Q, Cui PX, Zhu M, Fan TT, Ata-Ul-Karim ST, Gu JH, Wu S, Zhou DM, Wang YJ. Cd(II) retention and remobilization on δ-MnO 2 and Mn(III)-rich δ-MnO 2 affected by Mn(II). ENVIRONMENT INTERNATIONAL 2019; 130:104932. [PMID: 31238266 DOI: 10.1016/j.envint.2019.104932] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/05/2019] [Accepted: 06/13/2019] [Indexed: 06/09/2023]
Abstract
Birnessite owing to its negative surface charge and defective structure exhibits high sorption affinities for Cd(II). However, Mn(II) can not only compete for the sorption sites with Cd(II), but also react with structural Mn(IV) in birnessite to form Mn(III), and thus, affect Cd(II) immobilization by birnessite. Herein, we investigate effects of Mn(II) on Cd(II) retention and remobilization on two birnessite δ-MnO2 and Mn(III)-rich δ-MnO2 (denoted as HE-MnO2). At pH 5.5, Cd(II) sorption to birnessite was inhibited by Mn(II) addition. Mn(II) addition to δ-MnO2 led to Cd(II) migration from vacant sites to edge sites, forming double-corner sharing (DCS) complexes. Mn(II) introduction to δ-MnO2 led to less stable Cd(II) species formed on birnessite, indicating that Cd(II) was more firmly bound to vacant sites than edge sites of birnessite. Cd(II) formed double-edge sharing (DES) and DCS complexes on HE-MnO2. Mn(II) addition to HE-MnO2 increased the CdMn distance in DES complexes. The stability of adsorbed Cd(II) on HE-MnO2 was slightly elevated due to Mn(II) addition. At pH 7.5, Mn(II) had no effect on Cd(II) sorption and desorption amounts on birnessite. However, low concentration of Mn(II) added to δ-MnO2 induced partial migration of Cd(II) from vacant sites to edge sites while high concentration of Mn(II) added to birnessite led to the formation of amorphous Cd(II)-Mn(III) coprecipitate. These findings imply that aqueous Mn(II) is an important factor in influencing Cd(II) immobilization by birnessite in the environment.
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Affiliation(s)
- Qian Sun
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pei-Xin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, WY 82071, United States
| | - Ting-Ting Fan
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of the People's Republic of China, Nanjing 210008, China
| | - Syed Tahir Ata-Ul-Karim
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jia-Hui Gu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Song Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Dong-Mei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yu-Jun Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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Yang P, Post JE, Wang Q, Xu W, Geiss R, McCurdy PR, Zhu M. Metal Adsorption Controls Stability of Layered Manganese Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:7453-7462. [PMID: 31150220 DOI: 10.1021/acs.est.9b01242] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hexagonal birnessite, a typical layered Mn oxide (LMO), can adsorb and oxidize Mn(II) and thereby transform to Mn(III)-rich hexagonal birnessite, triclinic birnessite, or tunneled Mn oxides (TMOs), remarkably changing the environmental behavior of Mn oxides. We have determined the effects of coexisting cations on the transformation by incubating Mn(II)-bearing δ-MnO2 at pH 8 under anoxic conditions for 25 d (dissolved Mn < 11 μM). In the Li+, Na+, and K+ chloride solutions, the Mn(II)-bearing δ-MnO2 first transforms to Mn(III)-rich δ-MnO2 or triclinic birnessite (T-bir) due to the Mn(II)-Mn(IV) comproportionation, most of which eventually transform to a 4 × 4 TMO. In contrast, Mn(III)-rich δ-MnO2 and T-bir form and persist in the Mg2+ and Ca2+ chloride solutions. However, in the presence of surface adsorbed Cu(II), Mn(II)-bearing δ-MnO2 turns into Mn(III)-rich δ-MnO2 without forming T-bir or TMOs. The stabilizing power of the cations on the δ-MnO2 structure positively correlates with their binding strength to δ-MnO2 (Li+, Na+, and K+ < Mg2+ and Ca2+ < Cu(II)). Since metal adsorption decreases the surface energy of minerals, our finding suggests that the surface energy largely controls the thermodynamic stability of LMOs. Our study indicates that the adsorption of divalent metal cations, particularly transition metals, can be an important cause of the high abundance of LMOs, rather than the more stable TMO phases, in the environment.
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Affiliation(s)
- Peng Yang
- Department of Ecosystem Science and Management , University of Wyoming , Laramie , Wyoming 82071 , United States
| | - Jeffrey E Post
- Department of Mineral Sciences , Smithsonian Institution , Washington , District of Columbia 20013 , United States
| | - Qian Wang
- Department of Ecosystem Science and Management , University of Wyoming , Laramie , Wyoming 82071 , United States
| | - Wenqian Xu
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - Roy Geiss
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Patrick R McCurdy
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management , University of Wyoming , Laramie , Wyoming 82071 , United States
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Qian A, Zhang W, Shi C, Pan C, Giammar DE, Yuan S, Zhang H, Wang Z. Geochemical Stability of Dissolved Mn(III) in the Presence of Pyrophosphate as a Model Ligand: Complexation and Disproportionation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:5768-5777. [PMID: 30973718 DOI: 10.1021/acs.est.9b00498] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Dissolved Mn(III) species have recently been recognized as a significant form of Mn in redox transition zones, but their speciation, stability, and reactivity are poorly understood. Besides acting as the intermediate for Mn redox chemistry, Mn(III) can undergo disproportionation producing insoluble Mn oxides and aqueous Mn(II). Using pyrophosphate(PP) as a model ligand, we evaluated the thermodynamic and kinetic stability of Mn(III) complexes. They were stable at circumneutral pH and were prone to (partial) disproportionation at acidic or basic pH. With an initial lag phase, the kinetics of Mn(III)-PP disproportionation was autocatalytic with the produced Mn oxides promoting the disproportionation. X-ray diffraction and the average Mn oxidation state indicated that the solid products were not pure Mn(IV) oxides but a mixture of triclinic birnessite and δ-MnO2. Addition of synthetic analogs of the precipitates eliminated the lag phase, confirming their catalytic roles. Thermodynamic calculations adequately predicted the stability regime of Mn(III)-PP. The present results refined the constant for Mn(PP)25- formation, which allows a consistent and quantitative prediction of equilibrium speciation of Mn(III)-Mn(II)-birnessite with PP. A simple and robust model, which incorporated the thermodynamic constraints, autocatalytic rate law, and verified reaction stoichiometry, successfully simulated all kinetic data.
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Affiliation(s)
- Ao Qian
- State Key Laboratory of Biogeology and Environmental Geology , China University of Geosciences , Wuhan , Hubei China
| | - Wen Zhang
- Department of Environmental Science and Engineering , Fudan University , Shanghai , China
| | - Cheng Shi
- Department of Civil and Environmental Engineering , Louisiana State University , Baton Rouge , Louisiana United States
| | - Chao Pan
- Department of Energy, Environmental and Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri United States
| | - Daniel E Giammar
- Department of Energy, Environmental and Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri United States
| | - Songhu Yuan
- State Key Laboratory of Biogeology and Environmental Geology , China University of Geosciences , Wuhan , Hubei China
| | - Hongliang Zhang
- Department of Civil and Environmental Engineering , Louisiana State University , Baton Rouge , Louisiana United States
| | - Zimeng Wang
- Department of Environmental Science and Engineering , Fudan University , Shanghai , China
- Shanghai Institute of Pollution Control and Ecological Security , Shanghai , China
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Soldatova AV, Balakrishnan G, Oyerinde OF, Romano CA, Tebo BM, Spiro TG. Biogenic and Synthetic MnO 2 Nanoparticles: Size and Growth Probed with Absorption and Raman Spectroscopies and Dynamic Light Scattering. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4185-4197. [PMID: 30905145 DOI: 10.1021/acs.est.8b05806] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
MnO2 nanoparticles, similar to those found in soils and sediments, have been characterized via their UV-visible and Raman spectra, combined with dynamic light scattering and reactivity measurements. Synthetic colloids were prepared by thiosulfate reduction of permanganate, their sizes controlled with adsorbates acting as capping agents: bicarbonate, phosphate, and pyrophosphate. Biogenic colloids, products of the manganese oxidase, Mnx, were similarly characterized. The band-gap energies of the colloids were found to increase with decreasing hydrodynamic diameter, Dh, and were proportional to 1/ Dh2, as predicted from quantum confinement theory. The intensity ratio of the two prominent Mn-O stretching Raman bands also varied with particle size, consistent with the ratio of edge to bulk Mn atoms. Reactivity of the synthetic colloids toward reduction by Mn2+, in the presence of pyrophosphate to trap the Mn3+ product, was proportional to the surface to volume ratio, but showed surprising complexity. There was also a remnant unreactive fraction, likely attributable to Mn(III)-induced surface passivation. The band gap was similar for biogenic and synthetic colloids of similar size, but decreased when the enzyme solution contained pyrophosphate, which traps the intermediate Mn(III) and slows MnO2 growth. The band gap/size correlation was used to analyze the growth of the enzymatically produced MnO2 oxides.
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Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Gurusamy Balakrishnan
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Oyeyemi F Oyerinde
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Christine A Romano
- Division of Environmental and Biomolecular Systems , Oregon Health & Science University , Portland , Oregon 97239 , United States
| | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems , Oregon Health & Science University , Portland , Oregon 97239 , United States
| | - Thomas G Spiro
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
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Sun Q, Cui PX, Liu C, Peng SM, Alves ME, Zhou DM, Shi ZQ, Wang YJ. Antimony oxidation and sorption behavior on birnessites with different properties (δ-MnO 2 and triclinic birnessite). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 246:990-998. [PMID: 31159148 DOI: 10.1016/j.envpol.2018.12.027] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/20/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
Birnessites are abundant naturally occurring minerals with high sorption and oxidation capacity that could therefore play an important role in antimony (Sb) migration and transformation. There are various types of birnessites in the environment. However, little is known about the similarities and differences in Sb oxidation and sorption on birnessites with different properties. In this study, the behavior of Sb oxidation and sorption on two contrasting birnessites (δ-MnO2 and triclinic birnessite (TrBir)) were investigated via batch and kinetic experiments and various spectroscopic techniques. Our results showed that the reaction mechanisms between Sb and the two birnessites were similar. The edge sites of birnessites were responsible for Sb(III) oxidation. Mn(IV) was reduced to Mn(III) and Mn(II), bound with birnessites and released to the solution, respectively. Because of the rapid rate of electron transfer of adsorbed Sb(III) to birnessites, the only Sb species on δ-MnO2 after the oxidation reaction was Sb(V). Sb(V) was adsorbed at the edge sites of birnessites by replacing the OH group of birnessites, forming corner-sharing complexes with birnessites. However, the Sb sorption and oxidation capacities of the two birnessites were significantly different. Poorly-crystallized δ-MnO2 exhibited a much higher oxidation and sorption capacity than well-crystallized TrBir because the former had many more edge sites than the latter. This study reveals the general mechanism of the reaction between Sb and birnessite and indicates that birnessite with a high number of edge sites would exhibit a huge capacity in Sb oxidation and sorption.
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Affiliation(s)
- Qian Sun
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pei-Xin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing, 210008, China
| | - Cun Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing, 210008, China
| | - Shi-Meng Peng
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510,006, China
| | - Marcelo Eduardo Alves
- Department of Exact Sciences 'Luiz de Queiroz' Agricultural College - ESALQ/USP, Piracicaba, SP, 13418-900, Brazil
| | - Dong-Mei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing, 210008, China
| | - Zhen-Qing Shi
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510,006, China
| | - Yu-Jun Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, The Chinese Academy of Sciences, Nanjing, 210008, China.
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Sun B, Xiao Z, Dong H, Ma S, Wei G, Cao T, Guan X. Bisulfite triggers fast oxidation of organic pollutants by colloidal MnO 2. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:412-420. [PMID: 30326356 DOI: 10.1016/j.jhazmat.2018.10.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 09/25/2018] [Accepted: 10/01/2018] [Indexed: 05/25/2023]
Abstract
Colloidal MnO2 is the most reactive phase of Mn(IV) while HSO3- is a common reductant in water treatment. This study shows that the presence of HSO3- resulted in significant increase in the decomposition rate of organic contaminants by colloidal MnO2. The degradation rate of contaminants in the MnO2/HSO3- process dropped with elevating pH and a proper MnO2/HSO3- molar ratio was critical for efficient decomposition of contaminants. The time-resolved spectroscopy of manganese species, the influence of pyrophosphate on UV absorbance spectra, and the relative rate constants of contaminants oxidation in MnO2/HSO3- process suggested that the synergetic effect of HSO3- and colloidal MnO2 arose from the generation of Mn(III)aq, which could oxidize contaminants rapidly. The presence of pyrophosphate, ethylenediaminetetraacetic acid, and humic acid depressed the degradation of contaminants in MnO2/HSO3- process by complexing with Mn(III)aq, buffering the solution or competing with contaminants for Mn(III)aq, and/or inhibiting the consumption of bisulfite. However, Ca2+ and Mg2+ accelerated the oxidation of contaminants in MnO2/HSO3- process by enhancing the reduction of MnO2 by HSO3-. The good negative correlation of the O/N or H Mulliken charges of organic contaminants with their removal in MnO2/HSO3- process suggested that organic contaminants were oxidized by Mn(III)aq via electrophilic attack.
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Affiliation(s)
- Bo Sun
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China; Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Zhongjin Xiao
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Hongyu Dong
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Shangchen Ma
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Guangfeng Wei
- Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Tongcheng Cao
- Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xiaohong Guan
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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34
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Balgooyen S, Campagnola G, Remucal CK, Ginder-Vogel M. Impact of bisphenol A influent concentration and reaction time on MnO 2 transformation in a stirred flow reactor. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2019; 21:19-27. [PMID: 30542685 DOI: 10.1039/c8em00451j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bisphenol A (BPA) is an endocrine disrupting compound commonly found in natural waters at concentrations that are considered harmful for aquatic life. Manganese(iii/iv) oxides are strong oxidants capable of oxidizing organic and inorganic contaminants, including BPA. Here we use δ-MnO2 in stirred flow reactors to determine if higher influent BPA concentrations, or introduction rates, lead to increased polymer production. A major BPA oxidation product, 4-hydroxycumyl alcohol (HCA), is formed through radical coupling, and was therefore used as a metric for polymer production in this study. The influent BPA concentration in stirred flow reactors did not affect HCA yield, suggesting that polymeric production is not strongly dependent on influent concentrations. However, changes in influent BPA concentration affected BPA oxidation rates and the rate of δ-MnO2 reduction. Lower aqueous Mn(ii) production was observed in reactors at higher BPA introduction rates, suggesting that single-electron transfer and polymer production are favored under these conditions. However, an examination of Mn(ii) sorption during these reactions indicated that the length of the reaction, rather than BPA introduction rate, caused enhanced aqueous Mn(ii) production in reactors with low introduction rates and longer reaction times due to increased opportunity for disproportionation and comproportionation. This study demonstrates the importance of investigating both the organic and inorganic reactants in the aqueous and solid phases in this complex reaction.
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Affiliation(s)
- Sarah Balgooyen
- Environmental Chemistry and Technology Program, University of Wisconsin-Madison, 660 N. Park St., Madison, WI 53706, USA.
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35
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Eitel EM, Zhao S, Tang Y, Taillefert M. Effect of Manganese Oxide Aging and Structure Transformation on the Kinetics of Thiol Oxidation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:13202-13211. [PMID: 30358985 DOI: 10.1021/acs.est.8b03993] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The kinetics and mechanism of thiol oxidation by Mn oxides undergoing dynamic structural transformation under environmentally relevant conditions remain poorly understood. In this study, thiol/disulfide pair concentrations were simultaneously determined in situ using voltammetric microelectrodes during the interaction of four common thiols (cysteine, homocysteine, cysteamine, and glutathione) with fresh and aged δ-MnO2 at pH 7.0. The reaction kinetics was first order with respect to thiol and zero order with respect to Mn oxides. A transient intermediate sulfur surface species observed during the reaction provides evidence for a mechanism involving two successive one-electron transfer steps. The reaction kinetics of fresh and aged δ-MnO2 was investigated with cysteine and compared to that of manganite, a Mn(III) oxyhydroxide phase. The reactivity of aged δ-MnO2 decreased as a result of structural transformation to cryptomelane but remained higher than that of manganite, suggesting the potential roles of transient Mn(III) surface intermediate in promoting the reduction of Mn(IV) in δ-MnO2 and cryptomelane (compared to Mn(III) in manganite). This study demonstrates the importance of correlating Mn oxide mineral structure and redox reactivity and extends the potential for thiols commonly found in sedimentary environments to be utilized as electron shuttles during dissimilatory Mn reduction.
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Affiliation(s)
- Eryn M Eitel
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332-0340 , United States
| | - Shiliang Zhao
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332-0340 , United States
| | - Yuanzhi Tang
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332-0340 , United States
| | - Martial Taillefert
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332-0340 , United States
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36
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Xie H, Yang Y, Liu J, Kang Y, Zhang J, Hu Z, Liang S. Enhanced triclosan and nutrient removal performance in vertical up-flow constructed wetlands with manganese oxides. WATER RESEARCH 2018; 143:457-466. [PMID: 29986254 DOI: 10.1016/j.watres.2018.05.061] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/09/2018] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
Limited concentrations of oxygen in constructed wetlands (CWs) have inhibited their ability to remove emerging organic contaminants (EOCs) at μg/L or ng/L levels. Manganese (Mn) oxides were proposed as a solution, as they are powerful oxidants with strong adsorptive capabilities. In the present study, triclosan (TCS) was selected as a typical EOC, and CW microcosms with Mn oxides (birnessite) coated sand (B-CWs) and without (C-CWs) were developed to test the removal capacities of TCS and common nutrients. We found that the addition of Mn oxides coated sand significantly improved removal efficiencies of TCS, NH4-N, COD, NO3-N and TP (P < 0.05). The average concentration of Mn(II) effluent was 0.036 mg L-1, mostly lower than the drinking water limit. To gain insight into the mechanisms of pollution removal, Mn transformation, dissolved oxygen (DO) distribution, bacterial abundance, and microbial community composition were also investigated. Maximum Mn(II) was detected at 20 cm height of the B-CWs in anoxic zone. Although Mn-oxidizing bacteria existed in the layer of 30-50 cm with 103-104 CFU g-1 dry substate, Mn oxides were only detected at height from 40 to 50 cm with rich oxygen in B-CW. The quantities of bacterial 16S rRNA, amoA, narG and nosZ were not significantly different between two systems (P > 0.05), while Illumina high-throughput sequencing analysis revealed that the abundance of denitrifying bacteria was significant higher in B-CWs, and the abundance of Gammaproteobacteria that have a recognized role in Mn transformation were significantly increased. The results indicated that Mn oxides could enhance TCS and common pollutants removal in both anoxic and aerobic areas through the recycling of Mn between Mn(II) and biogenic Mn oxides.
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Affiliation(s)
- Huijun Xie
- Environment Research Institute, Shandong University, Jinan 250100, PR China.
| | - Yixiao Yang
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Junhua Liu
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Yan Kang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
| | - Zhen Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
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37
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Arsenite Depletion by Manganese Oxides: A Case Study on the Limitations of Observed First Order Rate Constants. SOIL SYSTEMS 2018. [DOI: 10.3390/soilsystems2030039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Zhang T, Liu L, Tan W, Suib SL, Qiu G, Liu F. Photochemical Formation and Transformation of Birnessite: Effects of Cations on Micromorphology and Crystal Structure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:6864-6871. [PMID: 29792324 DOI: 10.1021/acs.est.7b06592] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
As important components with excellent oxidation and adsorption activity in soils and sediments, manganese oxides affect the transportation and fate of nutrients and pollutants in natural environments. In this work, birnessite was formed by photocatalytic oxidation of Mn2+aq in the presence of nitrate under solar irradiation. The effects of concentrations and species of interlayer cations (Na+, Mg2+, and K+) on birnessite crystal structure and micromorphology were investigated. The roles of adsorbed Mn2+ and pH in the transformation of the photosynthetic birnessite were further studied. The results indicated that Mn2+aq was oxidized to birnessite by superoxide radicals (O2•-) generated from the photolysis of NO3- under UV irradiation. The particle size and thickness of birnessite decreased with increasing cation concentration. The birnessite showed a plate-like morphology in the presence of K+, while exhibited a rumpled sheet-like morphology when Na+ or Mg2+ was used. The different micromorphologies of birnessites could be ascribed to the position of cations in the interlayer. The adsorbed Mn2+ and high pH facilitated the reduction of birnessite to low-valence manganese oxides including hausmannite, feitknechtite, and manganite. This study suggests that interlayer cations and Mn2+ play essential roles in the photochemical formation and transformation of birnessite in aqueous environments.
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Affiliation(s)
- Tengfei Zhang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment , Huazhong Agricultural University , Wuhan 430070 , Hubei Province China
| | - Lihu Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment , Huazhong Agricultural University , Wuhan 430070 , Hubei Province China
| | - Wenfeng Tan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment , Huazhong Agricultural University , Wuhan 430070 , Hubei Province China
| | - Steven L Suib
- Department of Chemistry , University of Connecticut , 55 North Eagleville Road , Storrs , Connecticut 06269-3060 , United States
| | - Guohong Qiu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment , Huazhong Agricultural University , Wuhan 430070 , Hubei Province China
| | - Fan Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment , Huazhong Agricultural University , Wuhan 430070 , Hubei Province China
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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.
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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.
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Kar AS, Saha A, Chandane A, Kumar S, Tomar BS. Effect of carbonate on U(VI) sorption by nano-crystalline α-MnO2. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2017-2817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractU(VI) sorption on nano-crystalline α-MnO2was studied in NaClO4medium as a function of pH by batch sorption method in presence and absence of carbonate and subsequently employing surface complexation modeling (SCM) to predict species responsible for U(VI) sorption. The kinetic study of U(VI) sorption on nano-crystalline α-MnO2was carried out to fix the time of equilibration. In presence of carbonate, U(VI) sorption on nano-crystalline α-MnO2increases with pH of the suspension, leveling off in the pH range 5–8.5 thereafter decreasing at higher pH. However, in absence of carbonate, U(VI) sorption on nano-crystalline α-MnO2remains close to 100% at pH>5. The difference in sorption behavior of uranium in the presence and absence of carbonate can be explained in terms of uranium speciation in the two systems. The dissolution of nano-crystalline α-MnO2was studied in presence and absence of carbonate to ascertain its role in sorption. Surface complexation modeling was satisfactorily able to explain the sorption phenomena in all the systems. In addition, U(VI) sorption on nano-crystalline α-MnO2was compared with literature data on U(VI) sorption by δ-MnO2.
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Wang Y, Benkaddour S, Marafatto FF, Peña J. Diffusion- and pH-Dependent Reactivity of Layer-Type MnO 2: Reactions at Particle Edges versus Vacancy Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3476-3485. [PMID: 29430916 DOI: 10.1021/acs.est.7b05820] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Layer-type manganese oxides are among the strongest solid-phase oxidants in surface environments and readily oxidize a range of chemical species. However, knowledge of the role played by different surface sites in contaminant oxidation is scarce. In this study, we investigate the reactivity of particle edges versus vacancy sites in δ-MnO2 by combining Co sorption kinetic experiments with quick X-ray absorption spectroscopy. During the fast kinetic phase ( t < 10 min), Co sorption and oxidation occurred dominantly at edge sites at pH 8; at pH 6 and pH 4, reactions also occurred at vacancy sites but were limited in extent. At longer reaction times ( t > 10 min), continuous accumulation of Co at vacancy sites was observed, while the amount of Co at particle edges decreased or remained constant depending on the absence or presence of aqueous Co(II), respectively. These data are consistent with the diffusion-limited transport of metal cations to vacancy sites. In addition, at pH 8, the kinetics and extent of reaction at particle edges are greater than at pH 4-6. These results suggest that, although particle edges will be the first to react, layer vacancies will serve as the long-term sorption and oxidation sites for contaminant metals in MnO2-rich systems.
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Affiliation(s)
- Yuheng Wang
- Institute of Earth Surface Dynamics , University of Lausanne , CH-1015 Lausanne , Switzerland
| | - Sassi Benkaddour
- Institute of Earth Surface Dynamics , University of Lausanne , CH-1015 Lausanne , Switzerland
| | | | - Jasquelin Peña
- Institute of Earth Surface Dynamics , University of Lausanne , CH-1015 Lausanne , Switzerland
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42
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Wang Q, Yang P, Zhu M. Structural Transformation of Birnessite by Fulvic Acid under Anoxic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:1844-1853. [PMID: 29356523 DOI: 10.1021/acs.est.7b04379] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The structure and Mn(III) concentration of birnessite dictate its reactivity and can be changed by birnessite partial reduction, but effects of pH and reductant/birnessite ratios on the changes by reduction remain unclear. We found that the two factors strongly affect the structure of birnessite (δ-MnO2) and its Mn(III) content during its reduction by fulvic acid (FA) at pH 4-8 and FA/solid mass ratios of 0.01-10 under anoxic conditions over 600 h. During the reduction, the structure of δ-MnO2 is increasingly accumulated with both Mn(III) and Mn(II) but much more with Mn(III) at pH 8, whereas the accumulated Mn is mainly Mn(II) with little Mn(III) at pH 4 and 6. Mn(III) accumulation, either in layers or over vacancies, is stronger at higher FA/solid ratios. At FA/solid ratios ≥1 and pH 6 and 8, additional hausmannite and MnOOH phases form. The altered birnessite favorably adsorbs FA because of the structural accumulation of Mn(II, III). Like during microbially mediated oxidative precipitation of birnessite, the dynamic changes during its reduction are ascribed to the birnessite-Mn(II) redox reactions. Our work suggests low reactivity of birnessite coexisting with organic matter and severe decline of its reactivity by partial reduction in alkaline environment.
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Affiliation(s)
- Qian Wang
- Department of Ecosystem Science and Management, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Peng Yang
- Department of Ecosystem Science and Management, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming , Laramie, Wyoming 82071, United States
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43
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Balgooyen S, Alaimo PJ, Remucal CK, Ginder-Vogel M. Structural Transformation of MnO 2 during the Oxidation of Bisphenol A. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:6053-6062. [PMID: 28445042 DOI: 10.1021/acs.est.6b05904] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bisphenol A (BPA) is an endocrine-disrupting compound widely used in the plastic industry and found in natural waters at concentrations considered harmful for aquatic life. BPA is susceptible to oxidation by Mn(III/IV) oxides, which are commonly found in near-surface environments. Here, we quantify BPA oxidation rates and the formation of its predominant product, 4-hydroxycumyl alcohol (HCA), in tandem with transformation of a synthetic, Mn(III)-rich δ-MnO2. To investigate the effect of Mn oxide structural changes on BPA oxidation rate, 12 sequential additions of 80 μM BPA are performed at pH 7. During the additions, BPA oxidation rate decreases by 3 orders of magnitude, and HCA yield decreases from 40% to 3%. This is attributed to the accumulation of interlayer Mn(II/III) produced during the reaction, as observed using X-ray absorption spectroscopy, as well as additional spectroscopic and wet chemical techniques. HCA is oxidized at a rate that is 12.6 times slower than BPA and accumulates in solution. These results demonstrate that BPA degradation by environmentally relevant Mn(III/IV) oxides is inhibited by the buildup of solid-phase Mn(II/III), specifically in interlayer sites. Nevertheless, Mn oxides may limit BPA migration in near-surface environments and have potential for use in drinking and wastewater treatment.
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Affiliation(s)
| | - Peter J Alaimo
- Department of Chemistry, Seattle University , Seattle, Washington 98122, United States
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Ling FT, Post JE, Heaney PJ, Kubicki JD, Santelli CM. Fourier-transform infrared spectroscopy (FTIR) analysis of triclinic and hexagonal birnessites. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 178:32-46. [PMID: 28161657 DOI: 10.1016/j.saa.2017.01.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 01/01/2017] [Accepted: 01/16/2017] [Indexed: 06/06/2023]
Abstract
The characterization of birnessite structures is particularly challenging for poorly crystalline materials of biogenic origin, and a determination of the relative concentrations of triclinic and hexagonal birnessite in a mixed assemblage has typically required synchrotron-based spectroscopy and diffraction approaches. In this study, Fourier-transform infrared spectroscopy (FTIR) is demonstrated to be capable of differentiating synthetic triclinic Na-birnessite and synthetic hexagonal H-birnessite. Furthermore, IR spectral deconvolution of peaks resulting from MnO lattice vibrations between 400 and 750cm-1 yield results comparable to those obtained by linear combination fitting of synchrotron X-ray absorption fine structure (EXAFS) data when applied to known mixtures of triclinic and hexagonal birnessites. Density functional theory (DFT) calculations suggest that an infrared absorbance peak at ~1628cm-1 may be related to OH vibrations near vacancy sites. The integrated intensity of this peak may show sensitivity to vacancy concentrations in the Mn octahedral sheet for different birnessites.
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Affiliation(s)
- Florence T Ling
- Department of Geosciences, Penn State University, University Park, PA 16802, USA.
| | - Jeffrey E Post
- Department of Mineral Sciences, NHB 119, Smithsonian Institute, Washington, DC 20013-7012, USA
| | - Peter J Heaney
- Department of Geosciences, Penn State University, University Park, PA 16802, USA
| | - James D Kubicki
- Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Cara M Santelli
- Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA
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45
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Hinkle MAG, Dye KG, Catalano JG. Impact of Mn(II)-Manganese Oxide Reactions on Ni and Zn Speciation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3187-3196. [PMID: 28195711 DOI: 10.1021/acs.est.6b04347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Layered Mn oxide minerals (phyllomanganates) often control trace metal fate in natural systems. The strong uptake of metals such as Ni and Zn by phyllomanganates results from adsorption on or incorporation into vacancy sites. Mn(II) also binds to vacancies and subsequent comproportionation with structural Mn(IV) may alter sheet structures by forming larger and distorted Mn(III)O6 octahedra. Such Mn(II)-phyllomanganate reactions may thus alter metal uptake by blocking key reactive sites. Here we investigate the effect of Mn(II) on Ni and Zn binding to phyllomanganates of varying initial vacancy content (δ-MnO2, hexagonal birnessite, and triclinic birnessite) at pH 4 and 7 under anaerobic conditions. Dissolved Mn(II) decreases macroscopic Ni and Zn uptake at pH 4 but not pH 7. Extended X-ray absorption fine structure spectroscopy demonstrates that decreased uptake at pH 4 corresponds with altered Ni and Zn adsorption mechanisms. These metals transition from binding in the interlayer to sheet edges, with Zn increasing its tetrahedrally coordinated fraction. These effects on metal uptake and binding correlate with Mn(II)-induced structural changes, which are more substantial at pH 4 than 7. Through these structural effects and the pH-dependence of Mn(II)-metal competitive adsorption, system pH largely controls metal binding to phyllomanganates in the presence of dissolved Mn(II).
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Affiliation(s)
- Margaret A G Hinkle
- Department of Earth and Planetary Sciences, Washington University , 1 Brookings Drive, Saint Louis, Missouri 63130 United States
| | - Katherine G Dye
- Department of Earth and Planetary Sciences, Washington University , 1 Brookings Drive, Saint Louis, Missouri 63130 United States
| | - Jeffrey G Catalano
- Department of Earth and Planetary Sciences, Washington University , 1 Brookings Drive, Saint Louis, Missouri 63130 United States
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46
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Wang Q, Liao X, Xu W, Ren Y, Livi KJ, Zhu M. Synthesis of Birnessite in the Presence of Phosphate, Silicate, or Sulfate. Inorg Chem 2016; 55:10248-10258. [DOI: 10.1021/acs.inorgchem.6b01465] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qian Wang
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Xianya Liao
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Wenqian Xu
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yang Ren
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Kenneth J. Livi
- Materials
Characterization and Processing Center, Department of Materials Science
and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mengqiang Zhu
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
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47
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Elzinga EJ. (54)Mn Radiotracers Demonstrate Continuous Dissolution and Reprecipitation of Vernadite (δ-MnO2) during Interaction with Aqueous Mn(II). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8670-7. [PMID: 27403960 DOI: 10.1021/acs.est.6b02874] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
(54)Mn radiotracers were used to assess Mn atom exchange between aqueous Mn(II) and vernadite (δ-MnO2) at pH 5.0. Continuous solid-liquid redistribution of (54)Mn atoms occurred, and systems are near isotopic equilibrium after reaction for 3 months. Despite this extensive exchange, X-ray diffraction and X-ray absorption spectroscopy data showed no major changes in vernadite bulk mineralogy. These results demonstrate that the vernadite-Mn(II) interface is dynamic, with the substrate undergoing continuous dissolution and reprecipitation mediated by aqueous Mn(II) without observable impacts on its mineralogy. Interfacial redox reactions between adsorbed Mn(II) and solid-phase Mn(IV) and Mn(III) are proposed as the main drivers of this process. Interaction between aqueous Mn(II) and structural Mn(III) likely involves interfacial electron transfer coupled with Mn atom exchange. The exchange of aqueous Mn(II) and solid-phase Mn(IV) is more complex and is proposed to result from coupled interfacial comproportionation-disproportionation reactions, where electron transfer from adsorbed Mn(II) to lattice Mn(IV) produces transient Mn(III) species that disproportionate to regenerate aqueous Mn(II) and structural Mn(IV). These findings provide further evidence of the importance of Mn(II)(aq)-MnO2(s) interactions and the attendant production of transient Mn(III) intermediates to the geochemical functioning of phyllomanganates in environments undergoing Mn redox cycling.
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Affiliation(s)
- Evert J Elzinga
- Department of Earth & Environmental Sciences, Rutgers University , 101 Warren Street, Newark, New Jersey 07102, United States
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48
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Frierdich AJ, Spicuzza MJ, Scherer MM. Oxygen Isotope Evidence for Mn(II)-Catalyzed Recrystallization of Manganite (γ-MnOOH). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6374-6380. [PMID: 27249316 DOI: 10.1021/acs.est.6b01463] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Manganese is biogeochemically cycled between aqueous Mn(II) and Mn(IV) oxides. Aqueous Mn(II) often coexists with Mn(IV) oxides, and redox reactions between the two (e.g., comproportionation) are well known to result in the formation of Mn(III) minerals. It is unknown, however, whether aqueous Mn(II) exchanges with structural Mn(III) in manganese oxides in the absence of any mineral transformation (similar to what has been reported for aqueous Fe(II) and some Fe(III) minerals). To probe whether atoms exchange between a Mn(III) oxide and water, we use a (17)O tracer to measure oxygen isotope exchange between structural oxygen in manganite (γ-MnOOH) and water. In the absence of aqueous Mn(II), about 18% of the oxygen atoms in manganite exchange with the aqueous phase, which is close to the estimated surface oxygen atoms (∼11%). In the presence of aqueous Mn(II), an additional 10% (for a total of 28%) of the oxygen atoms exchange with water, suggesting that some of the bulk manganite mineral (i.e., beyond surface) is exchanging with the fluid. Exchange of manganite oxygen with water occurs without any observable change in mineral phase and appears to be independent of the rapid Mn(II) sorption kinetics. These experiments suggest that Mn(II) catalyzes manganese oxide recrystallization and illustrate a new pathway by which these ubiquitous minerals interact with their surrounding fluid.
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Affiliation(s)
- Andrew J Frierdich
- School of Earth, Atmosphere & Environment, Monash University , Clayton, VIC 3800, Australia
| | - Michael J Spicuzza
- Department of Geoscience, University of Wisconsin , Madison, Wisconsin 53706, United States
| | - Michelle M Scherer
- Department of Civil and Environmental Engineering, University of Iowa , Iowa City, Iowa 52242, United States
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Zhao H, Zhu M, Li W, Elzinga EJ, Villalobos M, Liu F, Zhang J, Feng X, Sparks DL. Redox Reactions between Mn(II) and Hexagonal Birnessite Change Its Layer Symmetry. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:1750-8. [PMID: 26745815 DOI: 10.1021/acs.est.5b04436] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Birnessite, a phyllomanganate and the most common type of Mn oxide, affects the fate and transport of numerous contaminants and nutrients in nature. Birnessite exhibits hexagonal (HexLayBir) or orthogonal (OrthLayBir) layer symmetry. The two types of birnessite contain contrasting content of layer vacancies and Mn(III), and accordingly have different sorption and oxidation abilities. OrthLayBir can transform to HexLayBir, but it is still vaguely understood if and how the reverse transformation occurs. Here, we show that HexLayBir (e.g., δ-MnO2 and acid birnessite) transforms to OrthLayBir after reaction with aqueous Mn(II) at low Mn(II)/Mn (in HexLayBir) molar ratios (5-24%) and pH ≥ 8. The transformation is promoted by higher pH values, as well as smaller particle size, and/or greater stacking disorder of HexLayBir. The transformation is ascribed to Mn(III) formation via the comproportionation reaction between Mn(II) adsorbed on vacant sites and the surrounding layer Mn(IV), and the subsequent migration of the Mn(III) into the vacancies with an ordered distribution in the birnessite layers. This study indicates that aqueous Mn(II) and pH are critical environmental factors controlling birnessite layer structure and reactivity in the environment.
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Affiliation(s)
- Huaiyan Zhao
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Wei Li
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University , Nanjing 210093, China
- Environmental Soil Chemistry Group, Delaware Environmental Institute and Department of Plant and Soil Sciences, University of Delaware , Newark, Delaware 19716, United States
| | - Evert J Elzinga
- Department of Earth & Environmental Sciences, Rutgers University , Newark, New Jersey 07102, United States
| | - Mario Villalobos
- Geochemistry Department, Geology Institute, Universidad Nacional Autónoma de México (UNAM) , Mexico, D.F. 04510, Mexico
| | - Fan Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, China
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100039, China
| | - Xionghan Feng
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, China
- Environmental Soil Chemistry Group, Delaware Environmental Institute and Department of Plant and Soil Sciences, University of Delaware , Newark, Delaware 19716, United States
| | - Donald L Sparks
- Environmental Soil Chemistry Group, Delaware Environmental Institute and Department of Plant and Soil Sciences, University of Delaware , Newark, Delaware 19716, United States
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Grangeon S, Fernandez-Martinez A, Warmont F, Gloter A, Marty N, Poulain A, Lanson B. Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms. GEOCHEMICAL TRANSACTIONS 2015; 16:12. [PMID: 26330763 PMCID: PMC4556320 DOI: 10.1186/s12932-015-0028-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 08/14/2015] [Indexed: 05/31/2023]
Abstract
BACKGROUND Vernadite is a nanocrystalline and turbostratic phyllomanganate which is ubiquitous in the environment. Its layers are built of (MnO6)(8-) octahedra connected through their edges and frequently contain vacancies and (or) isomorphic substitutions. Both create a layer charge deficit that can exceed 1 valence unit per layer octahedron and thus induces a strong chemical reactivity. In addition, vernadite has a high affinity for many trace elements (e.g., Co, Ni, and Zn) and possesses a redox potential that allows for the oxidation of redox-sensitive elements (e.g., As, Cr, Tl). As a result, vernadite acts as a sink for many trace metal elements. In the environment, vernadite is often found associated with tectomanganates (e.g., todorokite and cryptomelane) of which it is thought to be the precursor. The transformation mechanism is not yet fully understood however and the fate of metals initially contained in vernadite structure during this transformation is still debated. In the present work, the transformation of synthetic vernadite (δ-MnO2) to synthetic cryptomelane under conditions analogous to those prevailing in soils (dry state, room temperature and ambient pressure, in the dark) and over a time scale of ~10 years was monitored using high-energy X-ray scattering (with both Bragg-rod and pair distribution function formalisms) and transmission electron microscopy. RESULTS Migration of Mn(3+) from layer to interlayer to release strains and their subsequent sorption above newly formed vacancy in a triple-corner sharing configuration initiate the reaction. Reaction proceeds with preferential growth to form needle-like crystals that subsequently aggregate. Finally, the resulting lath-shaped crystals stack, with n × 120° (n = 1 or 2) rotations between crystals. Resulting cryptomelane crystal sizes are ~50-150 nm in the ab plane and ~10-50 nm along c*, that is a tenfold increase compared to fresh samples. CONCLUSION The presently observed transformation mechanism is analogous to that observed in other studies that used higher temperatures and (or) pressure, and resulting tectomanganate crystals have a number of morphological characteristics similar to natural ones. This pleads for the relevance of the proposed mechanism to environmental conditions.
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Affiliation(s)
| | | | - Fabienne Warmont
- />ICMN-CNRS-Université D’Orléans, 1b rue de la Férollerie, 45071 Orléans Cedex 2, France
| | - Alexandre Gloter
- />Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, 91405 Orsay Cedex, France
| | - Nicolas Marty
- />BRGM, 3 Avenue Guillemin, 45060 Orléans Cedex 2, France
| | - Agnieszka Poulain
- />ESRF-The European Synchrotron, 71 avenue des Martyrs, Grenoble, France
| | - Bruno Lanson
- />Univ. Grenoble Alpes, ISTerre, 38041 Grenoble, France
- />CNRS, ISTerre, 38041 Grenoble, France
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