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Li X, Cao Z, Du Y, Zhang Y, Wang J, Ma X, Hu P, Luo Y, Wu L. Multi-metal contaminant mobilizations by natural colloids and nanoparticles in paddy soils during reduction and reoxidation. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132684. [PMID: 37804759 DOI: 10.1016/j.jhazmat.2023.132684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/15/2023] [Accepted: 09/29/2023] [Indexed: 10/09/2023]
Abstract
Naturally-occurring colloids and nanoparticles are crucial in transporting heavy metal contaminants in soil-water systems. However, information on particle-bound metals' size distribution and elemental composition in paddy soils under redox-fluctuation is scarce. Here, we investigated the mobilization of Cu, Cd, and Pb-containing nanoparticles and colloids in four contaminated soils with distinctive geochemical properties during reduction and subsequent re-oxidation. Using AF4-UV-ICP-MS and STEM-EDS, we observed that particle-bound metals were primarily associated with two sizes ranges: 0.3-40 kDa (F1) and 130 kDa-450 nm (F2), which mainly consisted of organic matter (OM), iron hydroxide and clay minerals. Cu and Pb were more likely bound to colloid than Cd. Colloidal Cu, Pb and Cd accounted for averages of 83.2%, 72.4% and 19.8% of their total concentration in solution (<0.45 µm) during soil reduction, and decreased during soil re-oxidation. This proportion was also positively correlated with aqueous pH and DOC but negatively correlated with Eh. Further quantitative analysis demonstrated that Cu/Cd positively correlated with OM at nanometric scale (F1). This study provides quantitative insights into the size, composition and abundance of polymetallic pollutant-carrying particles in paddy soils during redox fluctuation, and highlights the importance of nanometric interactions between OM and toxic cationic metals for their release.
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Affiliation(s)
- Xinyang Li
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhenyu Cao
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yanpei Du
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yu Zhang
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jiajia Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Xingmao Ma
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Pengjie Hu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Yongming Luo
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Longhua Wu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Kermeur N, Pédrot M, Cabello-Hurtado F. Iron Availability and Homeostasis in Plants: A Review of Responses, Adaptive Mechanisms, and Signaling. Methods Mol Biol 2023; 2642:49-81. [PMID: 36944872 DOI: 10.1007/978-1-0716-3044-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Iron is an essential element for all living organisms, playing a major role in plant biochemistry as a redox catalyst based on iron redox properties. Iron is the fourth most abundant element of the Earth's crust, but its uptake by plants is complex because it is often in insoluble forms that are not easily accessible for plants to use. The physical and chemical speciation of iron, as well as rhizosphere activity, are key factors controlling the bioavailability of Fe. Iron can be under reduced (Fe2+) or oxidized (Fe3+) ionic forms, adsorbed onto mineral surfaces, forming complexes with organic molecules, precipitated to form poorly crystalline hydroxides to highly crystalline iron oxides, or included in crystalline Fe-rich mineral phases. Plants must thus adapt to a complex and changing iron environment, and their response is finely regulated by multiple signaling pathways initiated by a diversity of stimulus perceptions. Higher plants possess two separate strategies to uptake iron from rhizosphere soil: the chelation strategy and the reduction strategy in grass and non-grass plants, respectively. Molecular actors involved in iron uptake and mobilization through the plant have been characterized for both strategies. All these processes that contribute to iron homeostasis in plants are highly regulated in response to iron availability by downstream signaling responses, some of which are characteristic signaling signatures of iron dynamics, while others are shared with other environmental stimuli. Recent research has thus revealed key transcription factors, cis-acting elements, post-translational regulators, and other molecular mechanisms controlling these genes or their encoded proteins in response to iron availability. In addition, the most recent research is increasingly highlighting the crosstalk between iron homeostasis and nutrient response regulation. These regulatory processes help to avoid plant iron concentrations building up to potential cell functioning disruptions that could adversely affect plant fitness. Indeed, when iron is in excess in the plant, it can lead to the production and accumulation of dangerous reactive oxygen species and free radicals (H2O2, HO•, O2•-, HO•2) that can cause considerable damages to most cellular components. To cope with iron oxidative stress, plants have developed defense systems involving the complementary action of antioxidant enzymes and molecular antioxidants, safe iron-storage mechanisms, and appropriate morphological adaptations.
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Affiliation(s)
- Nolenn Kermeur
- University of Rennes, CNRS, Ecobio, UMR 6553, Rennes, France
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
| | - Mathieu Pédrot
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
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Nedjimi B. Seasonal Assessment of some Potentially Toxic Elements with Possible Animal Health Risks in Atriplex canescens (Pursh) Nutt. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 110:31. [PMID: 36583736 DOI: 10.1007/s00128-022-03681-6] [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: 06/21/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
In the present investigation Br (Bromine), Cr (Chromium) and Pb (Lead) concentrations were assessed employing X-ray florescence spectrometry to evaluate seasonal variation of these elements in the xero-halophyte Atriplex canescens (Pursh) Nutt., a shrub with high pastoral value. The results showed that A. canescens and its surrounding soil have similar accumulation patterns for Br and Pb across seasons, but Cr concentrations in shrubs are higher in spring than other seasons. The seasonal mean contents of trace elements in A. canescens descend in the following order: Cr (8.33 µg g- 1) > Br (5.34 µg g- 1) > Pb (0.24 µg g- 1). The maximum element transfer factor (ETF) of Cr and Pb was recorded in summer and autumn. However, no significant difference between seasons was found for Br. Principle component analysis (PCA) showed that Br, Cr and Pb were associated negatively with soil during all seasons. In contrast, A. canescens was only associated to Cr contents in the spring. Results provide evidence also that the levels of Br, Cr and Pb were within the safety-limits recommended by the National Research Council (NRC) guidelines for animal nutrition.
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Affiliation(s)
- Bouzid Nedjimi
- Laboratory of Exploration and Valorization of Steppe Ecosystem, Faculty of Science of Nature and Life, Ziane Achour University of Djelfa, Cité Aîn Chih, P.O. Box 3117, 17000, Djelfa, Algeria.
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Zhao Q, Saito T, Miyakawa K, Sasamoto H, Kobayashi T, Sasaki T. Sorption of Cs + and Eu 3+ ions onto sedimentary rock in the presence of gamma-irradiated humic acid. JOURNAL OF HAZARDOUS MATERIALS 2022; 428:128211. [PMID: 35032954 DOI: 10.1016/j.jhazmat.2021.128211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/20/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
The influence of humic acid (HA) and its radiological degradation on the sorption of Cs+ and Eu3+ by sedimentary rock (obtained from the Horonobe Underground Research Laboratory in Japan) was investigated to understand the sorption process of metal ions and humic substances. Aldrich HA solution was gamma-irradiated assuming a strong radiation from a highly radioactive waste to be disposed of in deep geological formations. Batch sorption experiments were performed to evaluate the effect of gamma-irradiated HA on the sorption of Cs+ and Eu3+ ions. The addition of non-irradiated HA weakened the Eu sorption because of the lower sorption of the negatively charged Eu-HA complexes compared with free Eu ions. The sorption of Cs ions was barely affected by the presence of HA and its gamma irradiation. The concentration ratio of metal complexed and non-complexed species in the solid and liquid phases was evaluated by sequential filtration and chemical equilibrium calculations. The ratios were low in both phases for Cs and supported the minimal contribution of HA to Cs sorption. However, the concentration ratio for Eu3+ in the liquid phase was high, indicating that the complexing ability of HA to Eu3+ was higher than that of HA to Cs+.
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Affiliation(s)
- Qi Zhao
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
| | - Takeshi Saito
- Institute for Integrated Radiation and Nuclear Science (KURNS), Kyoto University, Osaka, Japan
| | - Kazuya Miyakawa
- Horonobe Underground Research Center, Japan Atomic Energy Agency (JAEA), Hokkaido, Japan
| | - Hiroshi Sasamoto
- Horonobe Underground Research Center, Japan Atomic Energy Agency (JAEA), Hokkaido, Japan
| | - Taishi Kobayashi
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
| | - Takayuki Sasaki
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan.
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Andrade VS, Wiegand C, Pannard A, Gagneten AM, Pédrot M, Bouhnik-Le Coz M, Piscart C. How can interspecific interactions in freshwater benthic macroinvertebrates modify trace element availability from sediment? CHEMOSPHERE 2020; 245:125594. [PMID: 31855766 DOI: 10.1016/j.chemosphere.2019.125594] [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: 09/16/2019] [Revised: 12/02/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
This study aimed to assess how bioturbation by freshwater benthic macroinvertebrates with different biological traits alone or in combination could modify trace elements (TE) fate between sediment and water, and if water TE concentration and animal TE content impair their body stores. Three macroinvertebrate species were exposed to TE contaminated sediment for 7 days: the omnivorous Echinogammarus berilloni (Amphipoda), the sediment feeding Tubifex tubifex (Oligochaeta) and the filter feeding Pisidium sp. (Bivalvia). Treatments were one without invertebrates (control), two with amphipods or mussels alone, and the combinations amphipod-mussel, and amphipod-mussel-worms. Water TE concentration increased significantly in 2 or 3 species mesocosms, concerning mainly Rare Earth Elements, Cr, U and Pb, known to be associated to the colloidal phase. By contrast, water soluble TE were not affected by animals. For both, amphipods and mussels, TE body content increased with the number of coexisting species. For amphipods, this increase concerned both, soluble and colloid-associated TE, possibly due to intense contact and feeding from sediment and predation on tubificids. TE bioaccumulation in mussel was less important and characterized by soluble TE, with water filtration as most plausible uptake route. Protein, triglyceride and Whole Body Energy Budget increased in amphipods with the number of coexisting species (probably by feeding on mussels' feces and tubificids) whereas triglycerides declined in mussels (presumably filtration was disturbed by amphipods). This study highlights interspecific interactions as key drivers explaining both: TE bioturbation, depending on their water solubility or colloidal association, and the exposure/contamination of species through another species activity.
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Affiliation(s)
- Victoria Soledad Andrade
- Lab. de Ecotoxicología, Facultad de Humanidades y Ciencias, Universidad Nacional del Litoral, Ciudad Universitaria, Ruta Nacional Nº 168, Km 472.4, 3000, Santa Fe, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Godoy Cruz 2290, C1425FQB, Buenos Aires, Argentina; Univ Rennes, CNRS, ECOBIO - UMR 6553, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 14A, F-35000, Rennes, France.
| | - Claudia Wiegand
- Univ Rennes, CNRS, ECOBIO - UMR 6553, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 14A, F-35000, Rennes, France
| | - Alexandrine Pannard
- Univ Rennes, CNRS, ECOBIO - UMR 6553, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 14A, F-35000, Rennes, France
| | - Ana María Gagneten
- Lab. de Ecotoxicología, Facultad de Humanidades y Ciencias, Universidad Nacional del Litoral, Ciudad Universitaria, Ruta Nacional Nº 168, Km 472.4, 3000, Santa Fe, Argentina
| | - Mathieu Pédrot
- Univ Rennes, CNRS, Géosciences Rennes - UMR 6118, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 15, F-35000, Rennes, France
| | - Martine Bouhnik-Le Coz
- Univ Rennes, CNRS, Géosciences Rennes - UMR 6118, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 15, F-35000, Rennes, France
| | - Christophe Piscart
- Univ Rennes, CNRS, ECOBIO - UMR 6553, 263 Avenue Général Leclerc, Campus de Beaulieu, Bâtiment 14A, F-35000, Rennes, France
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6
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Mao LC, Young SD, Tye AM, Bailey EH. Predicting trace metal solubility and fractionation in Urban soils from isotopic exchangeability. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:1529-1542. [PMID: 28947320 DOI: 10.1016/j.envpol.2017.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/01/2017] [Accepted: 09/06/2017] [Indexed: 05/28/2023]
Abstract
Metal-salt amended soils (MA, n = 23), and historically-contaminated urban soils from two English cities (Urban, n = 50), were investigated to assess the effects of soil properties and contaminant source on metal lability and solubility. A stable isotope dilution method, with and without a resin purification step, was used to measure the lability of Cd, Cu, Ni, Pb and Zn. For all five metals in MA soils, lability (%E-values) could be reasonably well predicted from soil pH value with a simple logistic equation. However, there was evidence of continuing time-dependent fixation of Cd and Zn in the MA soils, following more than a decade of storage under air-dried conditions, mainly in high pH soils. All five metals in MA soils remained much more labile than in Urban soils, strongly indicating an effect of contaminant source on metal lability in the latter. Metal solubility was predicted for both sets of soil by the geochemical speciation model WHAM-VII, using E-value as an input variable. For soils with low metal solution concentrations, over-estimation of Cd, Ni and Zn solubility was associated with binding to the Fe oxide fraction while accurate prediction of Cu solubility was dependent on humic acid content. Lead solubility was most poorly described, especially in the Urban soils. Generally, slightly poorer estimation of metal solubility was observed in Urban soils, possibly due to a greater incidence of high pH values. The use of isotopically exchangeable metal to predict solubility is appropriate both for historically contaminated soils and where amendment with soluble forms of metal is used, as in toxicological trials. However, the major limitation to predicting solubility may lie with the accuracy of model input variables such as humic acid and Fe oxide contents where there is often a reliance on relatively crude analytical estimations of these variables. Trace metal reactivity in urban soils depends on both soil properties and the original source material; the WHAM geochemical model predicts solubility using isotopically exchangeable metal as an input.
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Affiliation(s)
- L C Mao
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom; School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - S D Young
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom.
| | - A M Tye
- British Geological Survey, Nicker Hill, Keyworth, Nottingham, NG12 5GG, United Kingdom
| | - E H Bailey
- Division of Agricultural and Environmental Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
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7
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Al-Sid-Cheikh M, Pédrot M, Bouhnik-Le Coz M, Dia A, Davranche M, Neaime C, Grasset F. Robust Method Using Online Steric Exclusion Chromatography-Ultraviolet-Inductively Coupled Plasma Mass Spectrometry To Investigate Nanoparticle Fate and Behavior in Environmental Samples. Anal Chem 2015; 87:10346-53. [DOI: 10.1021/acs.analchem.5b02413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Maya Al-Sid-Cheikh
- CNRS
UMR 6118, Géosciences Rennes, Université Rennes 1, Campus Beaulieu,
263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Mathieu Pédrot
- CNRS
UMR 6118, Géosciences Rennes, Université Rennes 1, Campus Beaulieu,
263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Martine Bouhnik-Le Coz
- CNRS
UMR 6118, Géosciences Rennes, Université Rennes 1, Campus Beaulieu,
263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Aline Dia
- CNRS
UMR 6118, Géosciences Rennes, Université Rennes 1, Campus Beaulieu,
263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Mélanie Davranche
- CNRS
UMR 6118, Géosciences Rennes, Université Rennes 1, Campus Beaulieu,
263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Chrystelle Neaime
- CNRS
UMR 6226, Institut des Sciences Chimiques de Rennes, Université Rennes 1, Campus Beaulieu, 263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Fabien Grasset
- CNRS
UMR 6226, Institut des Sciences Chimiques de Rennes, Université Rennes 1, Campus Beaulieu, 263 av. Général Leclerc, 35042 Rennes Cedex, France
- CNRS-Saint
Gobain, Laboratory for Innovative Key Materials and Structures, UMI
3629 LINK, National Institute of Material Science, 1-1 Namiki, 305-0044, Tsukuba, Japan
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8
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Catrouillet C, Davranche M, Dia A, Bouhnik-Le Coz M, Pédrot M, Marsac R, Gruau G. Thiol groups controls on arsenite binding by organic matter: new experimental and modeling evidence. J Colloid Interface Sci 2015; 460:310-20. [PMID: 26348657 DOI: 10.1016/j.jcis.2015.08.045] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 08/22/2015] [Indexed: 11/28/2022]
Abstract
Although it has been suggested that several mechanisms can describe the direct binding of As(III) to organic matter (OM), more recently, the thiol functional group of humic acid (HA) was shown to be an important potential binding site for As(III). Isotherm experiments on As(III) sorption to HAs, that have either been grafted with thiol or not, were thus conducted to investigate the preferential As(III) binding sites. There was a low level of binding of As(III) to HA, which was strongly dependent on the abundance of the thiols. Experimental datasets were used to develop a new model (the modified PHREEQC-Model VI), which defines HA as a group of discrete carboxylic, phenolic and thiol sites. Protonation/deprotonation constants were determined for each group of sites (pKA=4.28±0.03; ΔpKA=2.13±0.10; pKB=7.11±0.26; ΔpKB=3.52±0.49; pKS=5.82±0.052; ΔpKS=6.12±0.12 for the carboxylic, phenolic and thiols sites, respectively) from HAs that were either grafted with thiol or not. The pKS value corresponds to that of single thiol-containing organic ligands. Two binding models were tested: the Mono model, which considered that As(III) is bound to the HA thiol site as monodentate complexes, and the Tri model, which considered that As(III) is bound as tridentate complexes. A simulation of the available literature datasets was used to validate the Mono model, with logKMS=2.91±0.04, i.e. the monodentate hypothesis. This study highlighted the importance of thiol groups in OM reactivity and, notably, determined the As(III) concentration bound to OM (considering that Fe is lacking or at least negligible) and was used to develop a model that is able to determine the As(III) concentrations bound to OM.
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Affiliation(s)
| | - Mélanie Davranche
- Géosciences Rennes UMR 6118, Université Rennes 1, CNRS, 35042 Rennes cedex, France
| | - Aline Dia
- Géosciences Rennes UMR 6118, Université Rennes 1, CNRS, 35042 Rennes cedex, France
| | | | - Mathieu Pédrot
- Géosciences Rennes UMR 6118, Université Rennes 1, CNRS, 35042 Rennes cedex, France
| | - Rémi Marsac
- Ecole Nationale Supérieure de Chimie de Rennes, UMR CNRS 6226 F-35708 Rennes cedex 7, France
| | - Gérard Gruau
- Géosciences Rennes UMR 6118, Université Rennes 1, CNRS, 35042 Rennes cedex, France
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Al-Sid-Cheikh M, Pédrot M, Dia A, Guenet H, Vantelon D, Davranche M, Gruau G, Delhaye T. Interactions between natural organic matter, sulfur, arsenic and iron oxides in re-oxidation compounds within riparian wetlands: nanoSIMS and X-ray adsorption spectroscopy evidences. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 515-516:118-128. [PMID: 25704268 DOI: 10.1016/j.scitotenv.2015.02.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 01/22/2015] [Accepted: 02/01/2015] [Indexed: 06/04/2023]
Abstract
Arsenic (As) is a toxic and ubiquitous element which can be responsible for severe health problems. Recently, Nano-scale Secondary Ions Mass Spectrometry (nanoSIMS) analysis has been used to map organomineral assemblages. Here, we present a method adapted from Belzile et al. (1989) to collect freshly precipitated compounds of the re-oxidation period in a natural wetland environment using a polytetrafluoroethylene (PTFE) sheet scavenger. This method provides information on the bulk samples and on the specific interactions between metals (i.e. As) and the natural organic matter (NOM). Our method allows producing nanoSIMS imaging on natural colloid precipitates, including (75)As(-), (56)Fe(16)O(-), sulfur ((32)S(-)) and organic matter ((12)C(14)N) and to measure X-ray adsorption of sulfur (S) K-edge. A first statistical treatment on the nanoSIMS images highlights two main colocalizations: (1) (12)C(14)N(-), (32)S(-), (56)Fe(16)O(-) and (75)As(-), and (2) (12)C(14)N(-), (32)S(-) and (75)As(-). Principal component analyses (PCAs) support the importance of sulfur in the two main colocalizations firstly evidenced. The first component explains 70% of the variance in the distribution of the elements and is highly correlated with the presence of (32)S(-). The second component explains 20% of the variance and is highly correlated with the presence of (12)C(14)N(-). The X-ray adsorption near edge spectroscopy (XANES) on sulfur speciation provides a quantification of the organic (55%) and inorganic (45%) sulfur compositions. The co-existence of reduced and oxidized S forms might be attributed to a slow NOM kinetic oxidation process. Thus, a direct interaction between As and NOM through sulfur groups might be possible.
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Affiliation(s)
- Maya Al-Sid-Cheikh
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France.
| | - Mathieu Pédrot
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
| | - Aline Dia
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
| | - Hélène Guenet
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
| | - Delphine Vantelon
- Synchrotron Soleil, L'Orme des Merisiers, Saint Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - Mélanie Davranche
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
| | - Gérard Gruau
- Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
| | - Thomas Delhaye
- NanoSIMS Platform, Université Rennes 1, CNRS UMR 6118, Av. General Leclerc, 35042 Rennes Cedex, France
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Perdrial J, Thompson A, Chorover J. Soil Geochemistry in the Critical Zone: Influence on Atmosphere, Surface- and Groundwater Composition. DEVELOPMENTS IN EARTH SURFACE PROCESSES 2015. [DOI: 10.1016/b978-0-444-63369-9.00006-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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11
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Henderson R, Kabengi N, Mantripragada N, Cabrera M, Hassan S, Thompson A. Anoxia-induced release of colloid- and nanoparticle-bound phosphorus in grassland soils. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:11727-11734. [PMID: 23017121 DOI: 10.1021/es302395r] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Particle-facilitated transport is a key mechanism of phosphorus (P) loss in agroecosystems. We assessed contributions of colloid- and nanoparticle-bound P (nPP; 1-415 nm) to total P released from grassland soils receiving biannual poultry litter applications since 1995. In laboratory incubations, soils were subjected to 7 days of anoxic conditions or equilibrated at pH 6 and 8 under oxic conditions and then the extract was size fractionated by differential centrifugation/ultrafiltration for analysis of P, Al, Fe, Si, Ti, and Ca. Selected samples were characterized by transmission electron microscopy-energy dispersive spectroscopy (TEM-EDS) and field flow fractionation (FFF-ICP-MS). Particles released were present as nanoaggregates with a mean diameter of 200-250 nm, composed of ~50-nm aluminosilicate flakes studded with Fe and Ti-rich clusters (<10 nm) that contained most of the P detected by EDS. Anoxic incubation of stimulated nPP release with seasonally saturated soils released more nPP and Fe(2+)(aq) than well-drained soils; whereas, nonreductive particle dispersion, accomplished by raising the pH, yielded no increase in nPP release. This suggests Fe acts as a cementing agent, binding to the bulk soil P-bearing colloids that can be released during reducing conditions. Furthermore, it suggests prior periodic exposure to anoxic conditions increases susceptibility to redox-induced P mobilization.
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Affiliation(s)
- R Henderson
- Department of Crop and Soil Sciences, University of Georgia, Athens, Georgia 30602, USA
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How does organic matter constrain the nature, size and availability of Fe nanoparticles for biological reduction? J Colloid Interface Sci 2011; 359:75-85. [DOI: 10.1016/j.jcis.2011.03.067] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 03/17/2011] [Accepted: 03/17/2011] [Indexed: 11/17/2022]
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Pédrot M, Dia A, Davranche M. Dynamic structure of humic substances: Rare earth elements as a fingerprint. J Colloid Interface Sci 2010; 345:206-13. [DOI: 10.1016/j.jcis.2010.01.069] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 01/21/2010] [Accepted: 01/25/2010] [Indexed: 10/19/2022]
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