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Corzo Remigio A, Harris HH, Paterson DJ, Edraki M, van der Ent A. Chemical transformations of arsenic in the rhizosphere-root interface of Pityrogramma calomelanos and Pteris vittata. Metallomics 2023; 15:mfad047. [PMID: 37528060 PMCID: PMC10427965 DOI: 10.1093/mtomcs/mfad047] [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: 05/16/2023] [Accepted: 07/31/2023] [Indexed: 08/03/2023]
Abstract
Pityrogramma calomelanos and Pteris vittata are cosmopolitan fern species that are the strongest known arsenic (As) hyperaccumulators, with potential to be used in the remediation of arsenic-contaminated mine tailings. However, it is currently unknown what chemical processes lead to uptake of As in the roots. This information is critical to identify As-contaminated soils that can be phytoremediated, or to improve the phytoremediation process. Therefore, this study identified the in situ distribution of As in the root interface leading to uptake in P. calomelanos and P. vittata, using a combination of synchrotron micro-X-ray fluorescence spectroscopy and X-ray absorption near-edge structure imaging to reveal chemical transformations of arsenic in the rhizosphere-root interface of these ferns. The dominant form of As in soils was As(V), even in As(III)-dosed soils, and the major form in P. calomelanos roots was As(III), while it was As(V) in P. vittata roots. Arsenic was cycled from roots growing in As-rich soil to roots growing in control soil. This study combined novel analytical approaches to elucidate the As cycling in the rhizosphere and roots enabling insights for further application in phytotechnologies to remediated As-polluted soils.
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Affiliation(s)
- Amelia Corzo Remigio
- Centre for Water in the Minerals Industry, Sustainable Minerals Institute, The University of Queensland, Brisbane, Australia
| | - Hugh H Harris
- Department of Chemistry, The University of Adelaide, Adelaide, Australia
| | | | - Mansour Edraki
- Centre for Water in the Minerals Industry, Sustainable Minerals Institute, The University of Queensland, Brisbane, Australia
| | - Antony van der Ent
- Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, Brisbane, Australia
- Laboratory of Genetics, Wageningen University and Research, Wageningen, The Netherlands
- Laboratoire Sols et Environnement, INRAE, Université de Lorraine, Nancy, France
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Darma A, Yang J, Bloem E, Możdżen K, Zandi P. Arsenic biotransformation and mobilization: the role of bacterial strains and other environmental variables. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1763-1787. [PMID: 34713399 DOI: 10.1007/s11356-021-17117-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Over several decades, arsenic (As) toxicity in the biosphere has affected different flora, fauna, and other environmental components. The majority of these problems are linked with As mobilization due to bacterial dissolution of As-bearing minerals and its transformation in other reservoirs such as soil, sediments, and ground water. Understanding the process, mechanism, and various bacterial species involved in these processes under the influence of some ecological variables greatly contributes to a better understanding of the fate and implications of As mobilization into the environments. This article summarizes the process, role, and various types of bacterial species involved in the transformation and mobilization of As. Furthermore, insight into how Fe(II) oxidation and resistance mechanisms such as methylation and detoxification against the toxic effect of As(III) was highlighted as a potential immobilization and remediation strategy in As-contaminated sites. Furthermore, the significance and comparative advantages of some useful analytical tools used in the evaluation, speciation, and analysis of As are discussed and how their in situ and ex situ applications support assessing As contamination in both laboratory and field settings. Nevertheless, additional research involving advanced molecular techniques is required to elaborate on the contribution of these bacterial consortia as a potential agronomic tool for reducing As availability, particularly in natural circumstances. Graphical abstract. Courtesy of conceptual model: Aminu Darma.
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Affiliation(s)
- Aminu Darma
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Jianjun Yang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
| | - Elke Bloem
- Institute for Crop and Soil Science Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Bundesallee 69, 38116, Braunschweig, Germany
| | - Katarzyna Możdżen
- Institute of Biology, Pedagogical University of Krakow, Podchorążych 2 St, 30-084, Kraków, Poland
| | - Peiman Zandi
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
- International Faculty of Applied Technology, Yibin University, Yibin, 644000, People's Republic of China
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Strawn DG, Hettiarachchi GM. Fifty years of articles in JEQ on trace elements in the environment and future outlook. JOURNAL OF ENVIRONMENTAL QUALITY 2021; 50:1266-1281. [PMID: 34661908 DOI: 10.1002/jeq2.20296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/29/2021] [Indexed: 06/13/2023]
Abstract
Fifty years ago, the Journal of Environmental Quality (JEQ) was launched to provide an outlet for publication of research on the impacts of agriculture on the environment, and vice versa. A core concept of JEQ is advancement of environmental science, with emphasis on understanding factors that affect the fate, risks, and quality of soil, water, and atmospheric systems, and how these system processes affect plants, microbes, and animals. Trace elements are a focus area of JEQ because when present at higher than natural concentrations, they may pose risks to environmental quality and ecosystem health, depending on their bioavailability. Trace element biogeochemical cycling is affected by anthropogenic influences on land, air, and water, including land management practices such as agriculture and mining. The Journal of Environmental Quality has published a prolific catalog of scientific research publications on trace elements and their risks to humans, soil health, water quality, and the environment. In this review, research on trace elements and their impacts on environmental quality is presented, with a special focus on work published in JEQ.
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Affiliation(s)
- Daniel G Strawn
- Dep. of Soil and Water Systems, Univ. of Idaho, Moscow, ID, 83844, USA
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Prabu V, Obst M, Hosseinkhannazer H, Reynolds M, Rosendahl S, Wang J, Hitchcock AP. Instrumentation for in situ flow electrochemical Scanning Transmission X-ray Microscopy (STXM). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:063702. [PMID: 29960523 DOI: 10.1063/1.5023288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report the design and performance of a 3-electrode device for real time in situ scanning transmission X-ray microscopy studies of electrochemical processes under both static (sealed, non-flow) conditions and with a continuous flow of electrolytes. The device was made using a combination of silicon microfabrication and 3D printing technologies. The performance is illustrated by results of a study of copper deposition and stripping at a gold working electrode. X-ray absorption spectromicroscopy at the Cu 2p edge was used to follow the evolution as a function of potential and time of the spatial distributions of Cu(0) and Cu(i) species electro-deposited from an aqueous solution of copper sulphate. The results are interpreted in terms of competing mechanisms for the reduction of Cu(ii).
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Affiliation(s)
- Vinod Prabu
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S4M1, Canada
| | - Martin Obst
- BayCEER, University of Bayreuth, D-95448 Bayreuth, Germany
| | | | | | - Scott Rosendahl
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Jian Wang
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Adam P Hitchcock
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S4M1, Canada
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Bradham KD, Diamond GL, Burgess M, Juhasz A, Klotzbach JM, Maddaloni M, Nelson C, Scheckel K, Serda SM, Stifelman M, Thomas DJ. In vivo and in vitro methods for evaluating soil arsenic bioavailability: relevant to human health risk assessment. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2018; 21:83-114. [PMID: 29553912 PMCID: PMC9347188 DOI: 10.1080/10937404.2018.1440902] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Arsenic (As) is the most frequently occurring contaminant on the priority list of hazardous substances, which lists substances of greatest public health concern to people living at or near U.S. National Priorities List site. Accurate assessment of human health risks from exposure to As-contaminated soils depends on estimating its bioavailability, defined as the fraction of ingested As absorbed across the gastrointestinal barrier and available for systemic distribution and metabolism. Arsenic bioavailability varies among soils and is influenced by site-specific soil physical and chemical characteristics and internal biological factors. This review describes the state-of-the science that supports our understanding of oral bioavailability of soil As, the methods that are currently being explored for estimating soil As relative bioavailability (RBA), and future research areas that could improve our prediction of the oral RBA of soil As in humans. The following topics are addressed: (1) As soil geochemistry; (2) As toxicology; (3) in vivo models for estimating As RBA; (4) in vitro bioaccessibility methods; and (5) conclusions and research needs.
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Affiliation(s)
- Karen D Bradham
- a Public Health Chemistry Branch, Exposure Methods and Measurements Division, National Exposure Research Laboratory , Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | | | - Michele Burgess
- c Science Policy Branch, Office of Superfund Remediation and Technology Innovation, Office of Land and Emergency Management , US Environmental Protection Agency , Arlington , VA , USA
| | - Albert Juhasz
- d Future Industries Institute , University of South Australia , Adelaide , SA , Australia
| | | | - Mark Maddaloni
- e Region 2 , U.S. Environmental Protection Agency , New York , NY , USA
| | - Clay Nelson
- a Public Health Chemistry Branch, Exposure Methods and Measurements Division, National Exposure Research Laboratory , Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Kirk Scheckel
- f Land Remediation and Pollution Control Division, National Risk Management Research Laboratory , Office of Research and Development, U.S. Environmental Protection Agency , Cincinnati , Ohio
| | - Sophia M Serda
- g Region 9 , U.S. Environmental Protection Agency , San Francisco , CA , USA
| | - Marc Stifelman
- h Region 10 , U.S. Environmental Protection Agency , Seattle , WA , USA
| | - David J Thomas
- i Pharmacokinetics Branch, Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory , Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
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Hettiarachchi GM, Donner E, Doelsch E. Application of Synchrotron Radiation-based Methods for Environmental Biogeochemistry: Introduction to the Special Section. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:1139-1145. [PMID: 29293855 DOI: 10.2134/jeq2017.09.0349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To understand the biogeochemistry of nutrients and contaminants in environmental media, their speciation and behavior under different conditions and at multiple scales must be determined. Synchrotron radiation-based X-ray techniques allow scientists to elucidate the underlying mechanisms responsible for nutrient and contaminant mobility, bioavailability, and behavior. The continuous improvement of synchrotron light sources and X-ray beamlines around the world has led to a profound transformation in the field of environmental biogeochemistry and, subsequently, to significant scientific breakthroughs. Following this introductory paper, this special collection includes 10 papers that either present targeted reviews of recent advancements in spectroscopic methods that are applicable to environmental biogeochemistry or describe original research studies conducted on complex environmental samples that have been significantly enhanced by incorporating synchrotron radiation-based X-ray technique(s). We believe that the current focus on improving the speciation of ultra-dilute elements in environmental media through the ongoing optimization of synchrotron technologies (e.g., brighter light sources, improved monochromators, more efficient detectors) will help to significantly push back the frontiers of environmental biogeochemistry research. As many of the relevant techniques produce extremely large datasets, we also identify ongoing improvements in data processing and analysis (e.g., software improvements and harmonization of analytical methods) as a significant requirement for environmental biogeochemists to maximize the information that can be gained using these powerful tools.
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Proux O, Lahera E, Del Net W, Kieffer I, Rovezzi M, Testemale D, Irar M, Thomas S, Aguilar-Tapia A, Bazarkina EF, Prat A, Tella M, Auffan M, Rose J, Hazemann JL. High-Energy Resolution Fluorescence Detected X-Ray Absorption Spectroscopy: A Powerful New Structural Tool in Environmental Biogeochemistry Sciences. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:1146-1157. [PMID: 29293835 DOI: 10.2134/jeq2017.01.0023] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The study of the speciation of highly diluted elements by X-ray absorption spectroscopy (XAS) is extremely challenging, especially in environmental biogeochemistry sciences. Here we present an innovative synchrotron spectroscopy technique: high-energy resolution fluorescence detected XAS (HERFD-XAS). With this approach, measurement of the XAS signal in fluorescence mode using a crystal analyzer spectrometer with a ∼1-eV energy resolution helps to overcome restrictions on sample concentrations that can be typically measured with a solid-state detector. We briefly describe the method, from both an instrumental and spectroscopic point of view, and emphasize the effects of energy resolution on the XAS measurements. We then illustrate the positive impact of this technique in terms of detection limit with two examples dealing with Ce in ecologically relevant organisms and with Hg species in natural environments. The sharp and well-marked features of the HERFD-X-ray absorption near-edge structure spectra obtained enable us to determine unambiguously and with greater precision the speciation of the probed elements. This is a major technological advance, with strong benefits for the study of highly diluted elements using XAS. It also opens new possibilities to explore the speciation of a target chemical element at natural concentration levels, which is critical in the fields of environmental and biogeochemistry sciences.
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Larue C, Castillo-Michel H, Sobanska S, Trcera N, Sorieul S, Cécillon L, Ouerdane L, Legros S, Sarret G. Fate of pristine TiO2 nanoparticles and aged paint-containing TiO2 nanoparticles in lettuce crop after foliar exposure. JOURNAL OF HAZARDOUS MATERIALS 2014; 273:17-26. [PMID: 24709478 DOI: 10.1016/j.jhazmat.2014.03.014] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 02/14/2014] [Accepted: 03/07/2014] [Indexed: 05/29/2023]
Abstract
Engineered TiO2 nanoparticles (TiO2-NPs) are present in a large variety of consumer products, and are produced in largest amount. The building industry is a major sector using TiO2-NPs, especially in paints. The fate of NPs after their release in the environment is still largely unknown, and their possible transfer in plants and subsequent impacts have not been studied in detail. The foliar transfer pathway is even less understood than the root pathway. In this study, lettuces were exposed to pristine TiO2-NPs and aged paint leachate containing TiO2-NPs and microparticles (TiO2-MPs). Internalization and in situ speciation of Ti were investigated by a combination of microscopic and spectroscopic techniques. Not only TiO2-NPs pristine and from aged paints, but also TiO2-MPs were internalized in lettuce leaves, and observed in all types of tissues. No change in speciation was noticed, but an organic coating of TiO2-NPs is likely. Phytotoxicity markers were tested for plants exposed to pristine TiO2-NPs. No acute phytotoxicity was observed; variations were only observed in glutathione and phytochelatin levels but remained low as compared to typical values. These results obtained on the foliar uptake mechanisms of nano- and microparticles are important in the perspective of risk assessment of atmospheric contaminations.
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Affiliation(s)
- Camille Larue
- ISTerre, Université de Grenoble 1, CNRS, 38041 Grenoble, France.
| | | | - Sophie Sobanska
- Laboratoire de Spectrochimie Infra Rouge et Raman, UMR CNRS 8516, Université Lille 1, Bât C5, 59655 Villeneuve d'Ascq Cedex, France.
| | | | - Stéphanie Sorieul
- Université Bordeaux 1, CNRS/IN2P3, Centre d'Etudes Nucléaires de Bordeaux Gradignan, CENBG, Chemin du Solarium, BP120, 33175 Gradignan, France.
| | - Lauric Cécillon
- ISTerre, Université de Grenoble 1, CNRS, 38041 Grenoble, France.
| | - Laurent Ouerdane
- Laboratoire de Chimie Analytique Bio-Inorganique et Environnement, Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux (LCABIE/IPREM-UMR 5254), Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. Pierre Angot, 64053 Pau Cedex 9, France.
| | - Samuel Legros
- CEA/LITEN/DTNM/L2T, CEA Grenoble, Av des Martyrs, 38054 Grenoble Cedex 9, France.
| | - Géraldine Sarret
- ISTerre, Université de Grenoble 1, CNRS, 38041 Grenoble, France.
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Kim B, Levard C, Murayama M, Brown GE, Hochella MF. Integrated approaches of x-ray absorption spectroscopic and electron microscopic techniques on zinc speciation and characterization in a final sewage sludge product. JOURNAL OF ENVIRONMENTAL QUALITY 2014; 43:908-916. [PMID: 25602819 DOI: 10.2134/jeq2013.10.0418] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Integration of complementary techniques can be powerful for the investigation of metal speciation and characterization in complex and heterogeneous environmental samples, such as sewage sludge products. In the present study, we combined analytical transmission electron microscopy (TEM)-based techniques with X-ray absorption spectroscopy (XAS) to identify and characterize nanocrystalline zinc sulfide (ZnS), considered to be the dominant Zn-containing phase in the final stage of sewage sludge material of a full-scale municipal wastewater treatment plant. We also developed sample preparation procedures to preserve the organic and sulfur-rich nature of sewage sludge matrices for microscopic and spectroscopic analyses. Analytical TEM results indicate individual ZnS nanocrystals to be in the size range of 2.5 to 7.5 nm in diameter, forming aggregates of a few hundred nanometers. Observed lattice spacings match sphalerite. The ratio of S to Zn for the ZnS nanocrystals is estimated to be 1.4, suggesting that S is present in excess. The XAS results on the Zn speciation in the bulk sludge material also support the TEM observation that approximately 80% of the total Zn has the local structure of a 3-nm ZnS nanoparticle reference material. Because sewage sludge is frequently used as a soil amendment on agricultural lands, future studies that investigate the oxidative dissolution rate of ZnS nanoparticles as a function of size and aggregation state and the change of Zn speciation during post sludge-processing and soil residency are warranted to help determine the bioavailability of sludge-born Zn in the soil environment.
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Tamenori Y, Yoshimura T, Luan NT, Hasegawa H, Suzuki A, Kawahata H, Iwasaki N. Identification of the chemical form of sulfur compounds in the Japanese pink coral (Corallium elatius) skeleton using μ-XRF/XAS speciation mapping. J Struct Biol 2014; 186:214-23. [PMID: 24727132 DOI: 10.1016/j.jsb.2014.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 04/02/2014] [Accepted: 04/03/2014] [Indexed: 10/25/2022]
Abstract
The distributions and chemical forms of sulfur compounds in the skeleton of Japanese pink coral (Corallium elatius) were investigated using X-ray spectroscopic techniques combined with micro-focused soft X-ray radiation. Microscopic X-ray fluorescence/soft X-ray photoabsorption (μ-XRF/XAS) speciation mapping clarified that sulfate is the primary species in the coral skeleton, with minor amounts of organic sulfur, whereas both sulfate and organic sulfur coexist in coenenchyme. Analysis of the post-edge region of the XAS spectra confirmed that sulfate ions in the coral skeleton are mainly in the form of gypsum-like inorganic sulfate substituting for the carbonate ions in the calcite skeleton. The sulfate concentration was negatively correlated with the magnesium concentration and positively correlated with that of phosphorus. Speciation mapping of sulfate in the coral skeleton showed clear fluctuations with sulfate concentrations being higher at dark bands, whereas the small amount of organic sulfur had unclear dark/bright bands. These results suggest that the little organic sulfur that is present is contained in the organic matter embedded in the biocrystal of coral skeleton.
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Affiliation(s)
- Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan.
| | - Toshihiro Yoshimura
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
| | - Nguyen Trong Luan
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Hiroshi Hasegawa
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Atsushi Suzuki
- Geological Survey of Japan, National Institute of Advance Industrial Science and Technology, Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan
| | - Hodaka Kawahata
- Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan
| | - Nozomu Iwasaki
- Faculty of Geo-environmental Science, Rissho University, Magechi, Kumagaya, Saitama 360-0194, Japan
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Zeng T, Arnold WA, Toner BM. Microscale characterization of sulfur speciation in lake sediments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:1287-96. [PMID: 23282039 DOI: 10.1021/es303914q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Prairie pothole lakes (PPLs) are naturally sulfur-enriched wetlands in the glaciated prairie region of North America. High sulfate levels and dynamic hydrogeochemistry in combination render PPLs a unique environment to explore the speciation of sedimentary sulfur (S). The goals of this research were to define and quantify the solid-phase S pools in PPL sediments and track seasonal dynamics of S speciation. A quantitative X-ray microprobe method was developed based on S 1s X-ray absorption near-edge structure (XANES) spectroscopy and multienergy X-ray fluorescence mapping. Three S pools-pyritic S, reduced organic S (organic mono- and disulfide), and oxidized S (inorganic sulfate, ester sulfate, and sulfonate)-were identified in PPL sediments. No significant seasonal variation was evident for total S, but S speciation showed a seasonal response. During the spring-summer transition, the reduced organic S decreased from 55 to 15 mol %, with a concomitant rise in the oxidized S. During the summer-fall transition, the trend reversed and the reduced organic S grew to 75 mol % at the expense of the oxidized S. The pyritic S, on the other hand, remained relatively constant (∼22 mol %) over time. The seasonal changes in S speciation have strong potential to force the cycling of elements such as mercury in prairie wetlands.
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Affiliation(s)
- Teng Zeng
- Department of Civil Engineering, University of Minnesota, 500 Pillsbury Drive Southeast, Minneapolis, Minnesota 55455, United States
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Majumdar S, Peralta-Videa JR, Castillo-Michel H, Hong J, Rico CM, Gardea-Torresdey JL. Applications of synchrotron μ-XRF to study the distribution of biologically important elements in different environmental matrices: A review. Anal Chim Acta 2012; 755:1-16. [DOI: 10.1016/j.aca.2012.09.050] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 09/24/2012] [Accepted: 09/30/2012] [Indexed: 10/27/2022]
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13
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Affiliation(s)
- Kouichi Tsuji
- Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Kazuhiko Nakano
- Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Kouichi Hayashi
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Chul-Un Ro
- Department of Chemistry, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon, 402-751, Korea
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