1
|
Chen S, Li B, Zhao R, Zhang B, Zhang Y, Chen J, Sun J, Ma X. Natural mineral and industrial solid waste-based adsorbent for perfluorooctanoic acid and perfluorooctane sulfonate removal from surface water: Advances and prospects. CHEMOSPHERE 2024; 362:142662. [PMID: 38936483 DOI: 10.1016/j.chemosphere.2024.142662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/14/2024] [Accepted: 06/18/2024] [Indexed: 06/29/2024]
Abstract
PER: and polyfluorinated alkyl substances, especially perfluorooctanoic acid and perfluorooctane sulfonic acid (PFOX), have attracted considerable attention lately because of their widespread occurrence in aquatic environment and potential biological toxicity to animals and human beings. The development of economical, efficient, and engineerable adsorbents for removing PFOX in water has become one of the research focuses. This review summarized the recent progress on natural mineral and industrial solid based adsorbent (NM&ISW-A) and removal mechanisms concerning PFOX onto NM&ISW-A, as well as proposed the current challenges and future perspectives of using NM&ISW-A for PFOX removal in water. Kaolinite and montmorillonite are usually used as model clay minerals for PFOX removal, and have been proved to adsorb PFOX by ligand exchange and electrostatic attraction. Fe-based minerals, such as goethite, magnetite, and hematite, have better PFOX adsorption capacity than clay minerals. The adsorbent prepared from industrial solid waste by high temperature roasting has great potential application prospects. Fabricating nanomaterials, amination modification, surfactant modification, fluorination modification, developing versatile composites, and designing special porous structure are beneficial to improve the adsorption performance of PFOX onto NM&ISW-A by enhancing the specific surface area, positive charge, and hydrophobicity. Electrostatic interaction, hydrophobic interaction, hydrogen bond, ligand and ion exchange, and self-aggregation (formation of micelle or hemimicelle) are the main adsorption mechanisms of PFOX by NM&ISW-A. Among them, electrostatic and hydrophobic interactions play a considerable role in the removal of PFOX by NM&ISW-A. Therefore, NM&ISW-A with electrostatic functionalities and considerable hydrophobic segments enables rapid, efficient, and high-capacity removal of PFOX. The future directions of NM&ISW-A for PFOX removal include the preparation and regeneration of engineerable NM&ISW-A, the development of coupling technology for PFOX removal based on NM&ISW-A, the in-depth research on adsorption mechanism of PFOX by NM&ISW-A, as well as the development of NM&ISW-A for PFOX alternatives removal. This review paper would be helpful the comprehensive understanding of NM&ISW-A potential for PFOX removal and the PFOX removal mechanisms, and identifies the gaps for future research and development.
Collapse
Affiliation(s)
- Siyuan Chen
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Benhang Li
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
| | - Ruining Zhao
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Boxuan Zhang
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Yuqing Zhang
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Jiale Chen
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Jiahe Sun
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Xiaodong Ma
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
| |
Collapse
|
2
|
Wieland E, Miron GD, Ma B, Geng G, Lothenbach B. Speciation of iron(II/III) at the iron-cement interface: a review. MATERIALS AND STRUCTURES 2023; 56:31. [PMID: 36777453 PMCID: PMC9908688 DOI: 10.1617/s11527-023-02115-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Steel is used as reinforcement in construction materials and it is also an important component of cement-stabilized waste materials to be disposed of in deep geological repositories for radioactive waste. Steel corrosion releases dissolved Fe(II/III) species that can form corrosion products on the steel surface or interact with cementitious materials at the iron-cement interface. The thermodynamically stable Fe species in the given conditions may diffuse further into the adjacent, porous cement matrix and react with individual cement phases. Thus, the retention of Fe(II/III) by the hydrate assemblage of cement paste is an important process affecting the diffusive transport of the aqueous species into the cementitious materials. The diffusion of aqueous Fe(II/III) species from the steel surface into the adjacent cementitious material coupled with the kinetically controlled formation of iron corrosion products, such as by Fe(II) oxidation, decisively determines the extension of the corrosion front. This review summarises the state-of-the art knowledge on the interaction of ferrous and ferric iron with cement phases based on a literature survey and provides new insights and proper perspectives for future study on interaction systems of iron and cement.
Collapse
Affiliation(s)
- Erich Wieland
- Laboratory for Waste Management, Paul Scherrer Institut, Villigen PSI, Switzerland
| | - George Dan Miron
- Laboratory for Waste Management, Paul Scherrer Institut, Villigen PSI, Switzerland
| | - Bin Ma
- Laboratory for Waste Management, Paul Scherrer Institut, Villigen PSI, Switzerland
| | - Guoqing Geng
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576 Singapore
| | - Barbara Lothenbach
- Concrete & Asphalt Laboratory, Empa, Dübendorf, Switzerland
- Institute of Geological Sciences, University of Bern, Bern, Switzerland
| |
Collapse
|
3
|
Poulain A, Fernandez-Martinez A, Greneche JM, Prieur D, Scheinost AC, Menguy N, Bureau S, Magnin V, Findling N, Drnec J, Martens I, Mirolo M, Charlet L. Selenium Nanowire Formation by Reacting Selenate with Magnetite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:14817-14827. [PMID: 36184803 DOI: 10.1021/acs.est.1c08377] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The mobility of 79Se, a fission product of 235U and long-lived radioisotope, is an important parameter in the safety assessment of radioactive nuclear waste disposal systems. Nonradioactive selenium is also an important contaminant of drainage waters from black shale mountains and coal mines. Highly mobile and soluble in its high oxidation states, selenate (Se(VI)O42-) and selenite (Se(IV)O32-) oxyanions can interact with magnetite, a mineral present in anoxic natural environments and in steel corrosion products, thereby being reduced and consequently immobilized by forming low-solubility solids. Here, we investigated the sorption and reduction capacity of synthetic nanomagnetite toward Se(VI) at neutral and acidic pH, under reducing, oxygen-free conditions. The additional presence of Fe(II)aq, released during magnetite dissolution at pH 5, has an effect on the reduction kinetics. X-ray absorption spectroscopy analyses revealed that, at pH 5, trigonal gray Se(0) formed and that sorbed Se(IV) complexes remained on the nanoparticle surface during longer reaction times. The Se(0) nanowires grew during the reaction, which points to a complex transport mechanism of reduced species or to active reduction sites at the tip of the Se(0) nanowires. The concomitant uptake of aqueous Fe(II) and Se(VI) ions is interpreted as a consequence of small pH oscillations that result from the Se(VI) reduction, leading to a re-adsorption of aqueous Fe(II) onto the magnetite, renewing its reducing capacity. This effect is not observed at pH 7, where we observed only the formation of Se(0) with slow kinetics due to the formation of an oxidized maghemite layer. This indicates that the presence of aqueous Fe(II) may be an important factor to be considered when examining the environmental reactivity of magnetite.
Collapse
Affiliation(s)
- Agnieszka Poulain
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000Grenoble, France
| | | | - Jean-Marc Greneche
- Institut des Molécules et Matériaux du Mans, CNRS UMR-6283, Le Mans Université, F-72085Le Mans, France
| | - Damien Prieur
- The Rossendorf Beamline at ESRF, 71 avenue des Martyrs, 38043 Grenoble, France and HZDR Institute of Resource Ecology, Bautzener Landstrasse 400, 01328Dresden, Germany
| | - Andreas C Scheinost
- The Rossendorf Beamline at ESRF, 71 avenue des Martyrs, 38043 Grenoble, France and HZDR Institute of Resource Ecology, Bautzener Landstrasse 400, 01328Dresden, Germany
| | - Nicolas Menguy
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRD. Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 Place Jussieu, 75005Paris, France
| | - Sarah Bureau
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000Grenoble, France
| | - Valérie Magnin
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000Grenoble, France
| | - Nathaniel Findling
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000Grenoble, France
| | - Jakub Drnec
- ESRF, 71 avenue des Martyrs, 38043Grenoble, France
| | | | - Marta Mirolo
- ESRF, 71 avenue des Martyrs, 38043Grenoble, France
| | - Laurent Charlet
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000Grenoble, France
| |
Collapse
|
4
|
Wang K, Martinez AF, Simonelli L, Madé B, Hénocq P, Ma B, Charlet L. Redox Interaction between Selenite and Mackinawite in Cement Pore Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:5602-5610. [PMID: 35417136 DOI: 10.1021/acs.est.2c00901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In cement-rich radioactive waste repositories, mackinawite (FeS) forms at the steel corrosion interface within reinforced concrete and potentially retards the transport of redox-sensitive radionuclides (e.g., 79Se) in porous cement media. Redox interactions between selenite and mackinawite under hyperalkaline conditions remain unclear and require further investigations. Here, using comprehensive characterization on both aqueous and solid speciation, we successfully monitored the whole interaction process between selenite and mackinawite under hyperalkaline conditions. The results show similar chemical environments for SeO32- and S2-/Sn2- at the mackinawite-water interface, verifying an immediate reduction. After 192 h of reaction, SeO32- was reduced to solid Se0 and SeS2 species, accompanied by the oxidation of S2-/Sn2- to S2O32- and Fe(II) to Fe(III) in mackinawite. Aqueous speciation results showed that ∼99% of aqueous selenium was present as Se4S nanoparticles due to the dissolution of Se from the solid. In parallel, ∼62% of S2-/Sn2- was released into the solution, with mackinawite transforming into magnetite, Fe(OH)3 and FeS2O3+ complexed to Cl- or OH- species, and magnetite subsequently dispersed in the solution. This study provides valuable data about the retardation mechanisms of redox-sensitive radionuclides by soluble iron sulfides, which is critical to advance our understanding of reactive concrete barriers used in nuclear waste disposal systems.
Collapse
Affiliation(s)
- Kaifeng Wang
- University of Grenoble Alpes and CNRS, ISTerre, BP 53, 38041 Grenoble Cedex 9, France
- Engineering Technology Center of Decommissioning and Remediation, China Institute of Atomic Energy, 102413 Beijing, China
| | | | - Laura Simonelli
- BL22 - CLAESS, ALBA Synchrotron Light Source, 08290 Barcelona, Spain
| | - Benoit Madé
- ANDRA, 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Chatenay-Malabry Cedex, France
| | - Pierre Hénocq
- ANDRA, 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Chatenay-Malabry Cedex, France
| | - Bin Ma
- University of Grenoble Alpes and CNRS, ISTerre, BP 53, 38041 Grenoble Cedex 9, France
- Laboratory for Waste Management, Paul Scherrer Institut (PSI), Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Laurent Charlet
- University of Grenoble Alpes and CNRS, ISTerre, BP 53, 38041 Grenoble Cedex 9, France
| |
Collapse
|
5
|
Xiong J, Wang H, Yao J, He Q, Ma J, Yang J, Liu C, Chen Y, Huangfu X, Liu H. A critical review on sulfur reduction of aqueous selenite: Mechanisms and applications. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126852. [PMID: 34399225 DOI: 10.1016/j.jhazmat.2021.126852] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 07/28/2021] [Accepted: 08/05/2021] [Indexed: 06/13/2023]
Abstract
Selenite, which is extremely toxic at high concentrations, can easily be enriched in natural aquatic environments due to human activities, which causes great harm to ecosystems. Sulfur reduction can effectively reduce soluble selenite in large quantities to nontoxic solid elemental selenium, which plays a significant role in controlling the toxicity and cycle of selenium. In view of the bright prospects of the sulfur reduction reaction of selenite, this review comprehensively summarizes the continuous development in the sulfidation of selenite. First, the geochemical characteristics of aqueous selenium in different sulfur systems involving species distribution and various phase types at Eh-pH conditions were summarized. Second, sulfur reductions of selenite with chemical sulfide in natural water environments, sulfur reductase and extracellular polymer substances containing thiol groups in sulfate-reducing bacteria have been reviewed to further understand the corresponding mechanisms, rates and influencing factors. Furthermore, applications of sulfur reduction of selenium, including removal of selenium, enrichment of selenium, synthesis of selenoproteins and prevention of leakage of selenium, were also summarized. Finally, this review identified future research needs for the sulfidation of selenite for environmental applications.
Collapse
Affiliation(s)
- Jiaming Xiong
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Hainan Wang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Jinni Yao
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Qiang He
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Jingjing Yang
- Center for Separation and Purification Materials & Technologies, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Caihong Liu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Yao Chen
- 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.
| | - Hongxia Liu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
| |
Collapse
|
6
|
Municipal Solid Waste Incineration Ash-Incorporated Concrete: One Step towards Environmental Justice. BUILDINGS 2021. [DOI: 10.3390/buildings11110495] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Municipal solid waste and cement manufacture are two sources of environmental justice issues in urban and suburban areas. Waste utilization is an attractive alternative to disposal for eliminating environmental injustice, reducing potential hazards, and improving urban sustainability. The re-use and recycling of municipal solid waste incineration (MSWI) ash in the construction industry has drawn significant attention. Incorporating MSWI ash in cement and concrete production is a potential path that mitigates the environmental justice issues in waste management and the construction industry. This paper presents a critical overview of the pretreatment methods that optimize MSWI ash utilization in cement/concrete and the influences of MSWI ash on the performance of cement/concrete. This review aims to elucidate the potential advantages and limitations associated with the use of MSWI ash for producing cement clinker, alternative binder (e.g., alkali-activated material), cement substitutes, and aggregates. A brief overview of the generation and characteristics of MSWI ash is reported, accompanied by identifying opportunities for the use of MSWI ash-incorporated products in industrial-scale applications and recognizing associated environmental justice implications.
Collapse
|
7
|
Goberna-Ferrón S, Asta MP, Zareeipolgardani B, Bureau S, Findling N, Simonelli L, Greneche JM, Charlet L, Fernández-Martínez A. Influence of Silica Coatings on Magnetite-Catalyzed Selenium Reduction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3021-3031. [PMID: 33606515 DOI: 10.1021/acs.est.0c08146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The reactivity of iron(II/III) oxide surfaces may be influenced by their interaction with silica, which is ubiquitous in aquatic systems. Understanding the structure-reactivity relationships of Si-coated mineral surfaces is necessary to describe the complex surface behavior of nanoscale iron oxides. Here, we use Si-adsorption isotherms and Fourier transform infrared spectroscopy to analyze the sorption and polymerization of silica on slightly oxidized magnetite nanoparticles (15% maghemite and 85% magnetite, i.e., ∼2 maghemite surface layers), showing that Si adsorption follows a Langmuir isotherm up to 2 mM dissolved Si, where surface polymerization occurs. Furthermore, the effects of silica surface coatings on the redox-catalytic ability of magnetite are analyzed using selenium as a molecular probe. The results show that for partially oxidized nanoparticles and even under different Si surface coverages, electron transfer is still occurring. The results indicate anion exchange between silicate and the sorbed SeIV and SeVI. X-ray absorption near-edge structure analyses of the reacted Se indicate the formation of a mixed selenite/Se0 surface phase. We conclude that neither partial oxidation nor silica surface coatings block the sorption and redox-catalytic properties of magnetite nanoparticles, a result with important implications to assess the reactivity of mixed-valence phases in environmental settings.
Collapse
Affiliation(s)
- Sara Goberna-Ferrón
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Maria P Asta
- Institute of Earth Surface Dynamics, Faculty of Geosciences and Environment, University of Lausanne, 1015 Lausanne, Switzerland
| | - Bahareh Zareeipolgardani
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Sarah Bureau
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Nathaniel Findling
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Laura Simonelli
- BL22-CLÆSS: Core Level Absorption and Emission Spectroscopies Beamline-Experiments Division, ALBA Synchrotron Light Source, Ctra. BP 1413 km. 3,3, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Jean-Marc Greneche
- Institut des Molécules et Matériaux du Mans (IMMM) CNRS UMR-6283, Le Mans Université, Le Mans F-72085, France
| | - Laurent Charlet
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Alejandro Fernández-Martínez
- University of Grenoble Alpes, University of Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| |
Collapse
|
8
|
Zheng Z, Li Y, Cui M, Yang J, Wang H, Ma X, Chen Y. Insights into the effect of NaOH on the hydration products of solidified cement-NaNO 3 matrices and leaching behavior of Sr 2. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142581. [PMID: 33039893 DOI: 10.1016/j.scitotenv.2020.142581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 09/14/2020] [Accepted: 09/19/2020] [Indexed: 06/11/2023]
Abstract
The low-level and intermediate-level radioactive waste is generally an alkaline solution with high concentration of sodium salts. Moreover, extra NaOH will be added into the matrices when the high content of mineral admixtures is used in the preparation of solidified cement matrices. This study mainly researches the influence of NaOH on the structure of C-S-H gels and the leaching rate of Sr2+ in the solidified cement matrices by isothermal conduction calorimetry, X-ray diffractometry, thermogravimetry, 29Si nuclear magnetic resonance, mercury intrusion porosimetry and inductively coupled plasma. The results show that the addition of NaOH accelerated the hydration of cement in the early age but decreased the normalized hydration heat until 28 days. Also, the fraction of total Ca(OH)2 decreased with the increasing content of NaOH. Moreover, NaOH promoted the formation of C-S-H gels along the main chain by increasing the mean chain length but decreased the Q3 sites. However, the addition of NaOH has optimized the pore structure through reducing the porosity and median pore diameter. At last, the cumulative leaching fraction of Sr2+ at the NaOH content of 10% decreased by 17.5% compared to the NaOH content of 0.82%. Based on the results, it can be concluded that NaOH enhanced the adsorption capacity of C-S-H gels to Sr2+ and improved the immobilization performance of solidified cement matrices.
Collapse
Affiliation(s)
- Zhao Zheng
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Yuxiang Li
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
| | - Maoxuan Cui
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jun Yang
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Hongtai Wang
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Xue Ma
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Yan Chen
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| |
Collapse
|
9
|
Ma B, Fernandez-Martinez A, Kang M, Wang K, Lewis AR, Maffeis TGG, Findling N, Salas-Colera E, Tisserand D, Bureau S, Charlet L. Influence of Surface Compositions on the Reactivity of Pyrite toward Aqueous U(VI). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8104-8114. [PMID: 32469204 DOI: 10.1021/acs.est.0c01854] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Pyrite plays a significant role in governing the mobility of toxic uranium in an anaerobic environment via an oxidation-reduction process occurring at the mineral-water interface, but the factors influencing the reaction kinetics remain poorly understood. In this study, natural pyrites with different impurities (Pb, As, and Si) and different surface pretreatments were used to react with aqueous U(VI) from pH ∼3.0 to ∼9.5. Both aqueous and solid results indicated that freshly crushed pyrites, which do have more surface Fe2+/Fe3+ and S2- sites that were generated from breakage of Fe(S)-S bonds during ball milling, exhibited a much stronger reactivity than those treated with acid washing. Besides, U(VI) reduction which involves the possible intermediate U(V) and the formation of hyperstoichiometric UO2+x(s) was found to preferentially occur at Pb- and As-rich spots on the pyrite surface, suggesting that the incorporated impurities could act as reactive sites because of the generation of lattice defects and galena- and arsenopyrite-like local configurations. These reactive surface sites can be removed by acid washing, leaving a pyrite surface nearly inert toward aqueous U(VI). Thus, reactivity of pyrite toward U(VI) is largely governed by its surface compositions, which provides an insight into the chemical behavior of both pyrite and uranium in various environments.
Collapse
Affiliation(s)
- Bin Ma
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | | | - Mingliang Kang
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, 519082 Zhuhai, China
| | - Kaifeng Wang
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
- Decommissioning Engineering Technology Center, China Institute of Atomic Energy, 102413 Beijing, China
| | - Aled R Lewis
- Systems and Process Engineering Centre, College of Engineering, Swansea University, Fabian Way, SA1 8EN Swansea, U.K
| | - Thierry G G Maffeis
- Systems and Process Engineering Centre, College of Engineering, Swansea University, Fabian Way, SA1 8EN Swansea, U.K
| | - Nathaniel Findling
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Eduardo Salas-Colera
- Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, Cantoblanco, 28049 Madrid, Spain
- Spanish CRG BM25 SpLine Beamline at the ESRF, 71 Avenue de Martyrs, F-38043 Grenoble, France
| | - Delphine Tisserand
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Sarah Bureau
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| | - Laurent Charlet
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
| |
Collapse
|