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Olusegun SJ, Souza TGF, Mohallem NDS, Ciminelli VST. Removal and environmentally safe disposal of As(III) and As(V)-loaded ferrihydrite/biosilica composites. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 335:117489. [PMID: 36840998 DOI: 10.1016/j.jenvman.2023.117489] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/01/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Pure ferrihydrite and ferrihydrite-biosilica composite were synthesized and studied for the removal of As(III) and As(V). The synthesized materials have an adsorption capacity higher than some reported materials in the literature - 140 and 90 mg g-1 for As(III) and As(V), respectively. The pH of the solution was shown to impact greatly on As(V) adsorption, but not on As (III), which is stable as a protonated, uncharged oxyanion, at pH < 9.2. The adsorption products were subjected to thermal treatment (500 °C for 2 h), promoting ferric arsenate formation. The adsorbed As on ferrihydrite (Fh) was shown to inhibit the phase transformation of Fh to hematite. More so, thermal treatment was shown to oxidize As(III) to As (V). The changes in the adsorption residues after thermal treatment also had an impact on As mobility. The As (III) associated with the Fh phase increased from 42 to 95%, according to a sequential extraction protocol. Therefore, this work presents a process for As removal, followed by thermal treatment of arsenic-loaded ferrihydrites which enables environmentally safe disposal of As residues.
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Affiliation(s)
- Sunday J Olusegun
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Acqua Institute, Brazil.
| | - Taiane G F Souza
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Nelcy D S Mohallem
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Virginia S T Ciminelli
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Acqua Institute, Brazil.
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2
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Shen T, Li Y, Hu H, Lu X, Wang L, Tang Y. P/Pb transport at the interface of water and Al-substituted ferrihydrite: Effect of P/Pb loading sequence. CHEMOSPHERE 2023; 325:138374. [PMID: 36906007 DOI: 10.1016/j.chemosphere.2023.138374] [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: 12/05/2022] [Revised: 03/06/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
Sediment mineral such as Al-substituted ferrihydrite plays a critical role for contaminant transport in the river systems. Heavy metals and nutrient pollutants often coexisted in the natural aquatic environment, and they may enter the river at different time frames, altering the fate and transport of each other subsequently discharged into the river. However, most studies focused on the simultaneous adsorption of co-existing pollutants instead of their loading sequence. In this study, the transport of P and Pb at the interface of Al-substituted ferrihydrite and water was investigated under different P and Pb loading sequences. The results showed that preloaded P provided additional adsorption sites for the following adsorption of Pb, with enhanced Pb adsorption amount and accelerated adsorption process. Moreover, Pb preferred to be bounded with the preloaded P to form P-O-Pb ternary complexes rather than directly reacted with Fe-OH. The formation of the ternary complexes effectively prevented the release of Pb once adsorbed. However, the adsorption of P was slightly affected by the preloaded Pb, and most of the P were adsorbed onto Al-substituted ferrihydrite directly with the formation of Fe/Al-O-P. Moreover, the release process of the preloaded Pb was significantly inhibited by the following adsorbed P due to the formation of Pb-O-P. Meanwhile, the release of P was not detected from all P and Pb loaded samples of different adding sequence due to the high affinity between P and the mineral. Thus, the transport of Pb at the interface of Al-substituted ferrihydrite was seriously influenced by the adding sequence of Pb and P, while the transport of P was not sensitive to the adding sequence. The results provided important information for the transport of heavy metal and nutrients in river system with different discharging sequence, and offered new insights to further understand the secondary pollution in multi-contaminated river.
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Affiliation(s)
- Tingting Shen
- Department of Environmental Engineering, Taizhou University, Taizhou, Zhejiang, 318000, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yongjie Li
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
| | - Hongwei Hu
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiao Lu
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Lijuan Wang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuanyuan Tang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
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3
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Tokunaga K, Tanaka K, Takahashi Y, Kozai N. Improvement of the Stability of IO 3--, SeO 32--, and SeO 42--Coprecipitated Barite after Treatment with Phosphate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3166-3175. [PMID: 36780547 DOI: 10.1021/acs.est.2c08939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Coprecipitation of radionuclides with barite has been studied to remove radionuclides from radioactive liquid waste because of its excellent removal efficiency; however, little information exists concerning the stability of the ions coprecipitated with barite. This study systematically investigated the stability of iodate, selenite, and selenate coprecipitated with barite via leaching tests. These oxyanions were gradually leached from the oxyanion-bearing barite into ultrapure water over time. Leaching of the oxyanions significantly increased in leaching solutions containing NaCl (pH 5.3), NaNO3 (pH 5.9), and Na2SO4 (pH 5.7). Conversely, leaching of the oxyanions was suppressed in KH2PO4 solution (pH 8.5), indicating that phosphate stabilized the oxyanion-bearing barite. The effect of phosphate treatment on oxyanion-bearing barite was further investigated. The results showed that the barite surface was modified with phosphate, and a thin surface layer of a barium phosphate-like structure was formed. The amount of oxyanions leached from the phosphate-treated samples into leaching solutions containing NaCl or NaNO3 was much lower than the amounts leached from the untreated barite samples into ultrapure water. The barite coprecipitation combined with subsequent phosphate treatment may be a promising method to efficiently remove iodate, selenite, and selenate from wastewater and stabilize them as barite coprecipitates.
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Affiliation(s)
- Kohei Tokunaga
- Ningyo-Toge Environmental Engineering Center, Japan Atomic Energy Agency, Tomata, Okayama 708-0698, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Kazuya Tanaka
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naofumi Kozai
- Ningyo-Toge Environmental Engineering Center, Japan Atomic Energy Agency, Tomata, Okayama 708-0698, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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4
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Fan Q, Wang L, Fu Y, Wang Z. Impacts of coexisting mineral on crystallinity and stability of Fe(II) oxidation products: Implications for neutralization treatment of acid mine drainage. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130060. [PMID: 36182886 DOI: 10.1016/j.jhazmat.2022.130060] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 09/14/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
The neutralization treatment of acid mine drainage involves the oxidation of Fe(II), but little is known about the effects of co-existing minerals on the oxidation and hydrolysis of Fe(II) to iron oxides. Here we investigated the transformation of fresh and heated Fe(II) oxidation coprecipitates, which were synthesized in the presence and the absence of five co-existing minerals (montmorillonite, kaolin, quartz (SiO2), aluminium oxide (Al2O3) and calcium carbonate (CaCO3)). In the FeSO4 system with montmorillonite or kaolin, the formation of lepidocrocite was inhibited with the increase of clay mineral contents. In the same system, heated coprecipitates of montmorillonite were mainly comprised of amorphous ferrihydrite and its transformation was retarded by the excess montmorillonite. In the FeCl2 system with SiO2, Al2O3 or CaCO3, akaganeite formation was inhibited with the increase in the corresponding mineral contents. In the same system, goethite formation was blocked by either CaCO3 or Al2O3 and the growth of lepidocrocite was inhibited by CaCO3 or SiO2. However, magnetite formation was enhanced by addition of CaCO3. These findings are important for predicting products of abiotic Fe(II) oxidation during the neutralization of acid mine drainage and for better understanding the transformation of amorphous iron oxides in the complicated environmental matrix.
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Affiliation(s)
- Qingya Fan
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Lingli Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Yu Fu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhaohui Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; State Key Laboratory of Mineral Processing, Beijing 102628, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, China.
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5
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Souza TG, Olusegun SJ, Galvao BR, Da Silva JL, Mohallem ND, Ciminelli VS. Mechanism of amoxicillin adsorption by ferrihydrites: experimental and computational approaches. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Effects of Calcium on Arsenate Adsorption and Arsenate/Iron Bioreduction of Ferrihydrite in Stimulated Groundwater. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19063465. [PMID: 35329158 PMCID: PMC8955117 DOI: 10.3390/ijerph19063465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/11/2022] [Accepted: 03/12/2022] [Indexed: 12/10/2022]
Abstract
The reduction and transformation of arsenic-bearing ferrihydrite by arsenate-iron reducing bacteria is one of the main sources of arsenic enrichment in groundwater. During this process the coexistence cations may have a considerable effect. However, the ionic radius of calcium is larger than that of iron and shows a low affinity for ferrihydrite, and the effect of coexisting calcium on the migration and release of arsenic in arsenic-bearing ferrihydrite remains unclear. This study mainly explored the influence of adsorbed Ca2+ on strain JH012-1-mediated migration and release of arsenate in a simulated groundwater environment, in which 3 mM ferrihydrite and pH 7.5. Ca2+ were pre-absorbed on As(V)-containing ferrihydrite with a As:Fe ratio of 0.2. Solid samples were analyzed by X-ray diffraction (XRD), scanning electron microscopic (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results show that calcium and arsenate can synergistically adsorb on ferrihydrite due to the electrostatic interactions, and the adsorbed Ca2+ mainly exists on the surface through the outer-sphere complex. Adsorbed Ca2+ entering the stimulated groundwater was easily disturbed and led to an extra release of 3.5 mg/L arsenic in the early stage. Moreover, adsorbed Ca2+ inhibited biogenic ferrous ions from accumulating on ferrihydrite. As a result, only 12.30% Fe(II) existed in the solid phase, whereas 29.35% existed without Ca2+ adsorption. Thus, the generation of parasymplesite was inhibited, which is not conducive to the immobilization of arsenic in groundwater.
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7
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Zhang T, Chen X, Wang Y, Li L, Sun Y, Wang Y, Zeng X. The stability of poorly crystalline arsenical ferrihydrite after long-term soil suspension incubation. CHEMOSPHERE 2022; 291:132844. [PMID: 34767854 DOI: 10.1016/j.chemosphere.2021.132844] [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: 08/23/2021] [Revised: 11/02/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
2- Line ferrihydrite (Fh) is widely used as a robust amendment for rapid arsenic removal or remediation in water or soil. However, the poorly crystalline phase of Fh is unstable and leads to arsenic leaching after long-term submergence in reductive aquatic and soil environments. In this study, the synthesized As(V)-bound Fh was characterized by various spectral approaches to investigate the factors that may affect the variation in As(V)-Fh in long-term continuously submerged soil suspensions. The X-ray diffraction (XRD) results showed that hematite was the main product and that goethite was the byproduct after 360 d of incubation. Approximately 12-17% and 4-5% Fh were transformed at As/Fe mole ratios of 0.005 and 0.05, respectively. After 360 d of incubation, the hematite morphology was clearly observed by scanning electron microscopy (SEM), and the As(V)-Fh surface areas were also decreased by 17.3-27.6% and 11.9-16.6% for As/Fe mole ratios of 0.005 and 0.05, respectively. In a comparison of the two tested soils (soils sampled in Sichuan Province (SC) and Hunan Province (HN)), As(V)-Fh transformed faster in HN soil suspensions, and more hematite and goethite were formed. Furthermore, during the incubation period, As(V) was transformed to As(III), and both species were released into the suspension from the As(V)-Fh surface. It was suggested that soil pH and Fe(II) concentration were key factors controlling the As(V)-Fh transformation process, and the differences between the two soils were due to the different soil pH values and contents of available Fe. Arsenic release was mainly caused by Fh transformation and ligand competition with soil organic matter (SOM).
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Affiliation(s)
- Tuo Zhang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing, 100081, China; College of Environmental Science & Engineering, China West Normal University, Nanchong, Sichuan, 637009, China
| | - Xinyi Chen
- College of Environmental Science & Engineering, China West Normal University, Nanchong, Sichuan, 637009, China
| | - Yu Wang
- College of Environmental Science & Engineering, China West Normal University, Nanchong, Sichuan, 637009, China
| | - Lijuan Li
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing, 100081, China
| | - Yuanyuan Sun
- Key Laboratory of Plant Physiology and Developmental Regulation, Guizhou Normal University, Guiyang, Guizhou, 550025, China
| | - Yanan Wang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing, 100081, China
| | - Xibai Zeng
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing, 100081, China.
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8
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Ding Z, Sun G, Fu F, Ye C. Phase transformation of Cr(VI)-adsorbed ferrihydrite in the presence of Mn(II): Fate of Mn(II) and Cr(VI). J Environ Sci (China) 2022; 113:251-259. [PMID: 34963533 DOI: 10.1016/j.jes.2021.06.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 06/14/2023]
Abstract
Ferrihydrite is an important sink for the toxic heavy metal ions, such as Cr(VI). As ferrihydrite is thermodynamically unstable and gradually transforms into hematite and goethite, the stability of Cr(VI)-adsorbed ferrihydrite is environmentally significant. This study investigated the phase transformation of Cr(VI)-adsorbed ferrihydrite at different pH in the presence of aqueous Mn(II), as well as the fate of Mn(II) and Cr(VI) in the transformation process of ferrihydrite. Among the ferrihydrite transformation products, hematite was dominant, and goethite was minor. The pre-adsorbed Cr(VI) inhibited the conversion of ferrihydrite to goethite at initial pH 3.0, whereas little amount of adsorbed Mn(II) favored the formation of goethite at initial pH 7.0. After the aging process, Cr species in solid phase existed primarily as Cr(III) in the presence of Mn(II) at initial pH 7.0 and 11.0. The aqueous Mn concentration was predominantly unchanged at initial pH 3.0, whereas the aqueous Mn(II) was adsorbed onto ferrihydrite or form Mn(OH)2 precipitates at initial pH 7.0 and 11.0, promoting the immobilization of Cr(VI). Moreover, the oxidation of Mn(II) occurred at initial pH 7.0 and 11.0, forming Mn(III/IV) (hydr)oxides.
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Affiliation(s)
- Zecong Ding
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Guangzhao Sun
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Fenglian Fu
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Chujia Ye
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
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Cui H, Bao B, Cao Y, Zhang S, Shi J, Zhou J, Zhou J. Combined application of ferrihydrite and hydroxyapatite to immobilize soil copper, cadmium, and phosphate under flooding-drainage alternations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118323. [PMID: 34637825 DOI: 10.1016/j.envpol.2021.118323] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/16/2021] [Accepted: 10/07/2021] [Indexed: 05/21/2023]
Abstract
Hydroxyapatite (HAP) can effectively immobilize soil heavy metals, but excess phosphate would be released to aquatic ecosystem, resulting in eutrophication. This study investigated the effects of ferrihydrite (FH) on the HAP immobilization of copper (Cu) and cadmium (Cd) and their reduction of phosphorus release under flooding-drainage alternation conditions. Results showed that the incorporation of HAP and FH significantly increased soil solution pH and decreased Cu2+ and Cd2+ concentrations. Applications of FH, HAP, and FH-HAP (FH and HAP combination) can all enhance soil pH and reduce CaCl2-extractable and exchangeable Cu and Cd, but HAP addition increased soluble phosphate by 6.60-7.77 times compared to control. However, FH-HAP application can significantly reduce phosphate release by 92.7-99.7% compared to HAP application. FH-HAP was the most effective to reduce exchangeable Cu and Cd by 49.8-93.4% and 50.9-88.8% and decreased labile and moderately labile phosphorus by 34.0-74.4% and 13.5-18.6%, respectively, while increased stable phosphorus by 22-45.1% than single HAP. All FH treatments significantly increased amorphous iron oxides by the factors of 4.66-20.8, but only 3% and 5% of FH applications slightly enhanced crystal iron oxides by the factors of 0.81-1.27. The major implication is that the combination of FH and HAP can not only immobilize of Cu and Cd, but also reduce the risk of phosphate release by HAP addition.
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Affiliation(s)
- Hongbiao Cui
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing, 210008, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area with High Groundwater Level, Anhui University of Science and Technology, Huainan, 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu, 241003, China
| | - Binglu Bao
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area with High Groundwater Level, Anhui University of Science and Technology, Huainan, 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu, 241003, China
| | - Yong Cao
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area with High Groundwater Level, Anhui University of Science and Technology, Huainan, 232001, China; Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu, 241003, China
| | - Shiwen Zhang
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China; Engineering Laboratory of Anhui Province for Comprehensive Utilization of Water and Soil Resources and Construction of Ecological Protection in Mining Area with High Groundwater Level, Anhui University of Science and Technology, Huainan, 232001, China
| | - Jianjun Shi
- Institute of Environment-friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu, 241003, China
| | - Jing Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing, 210008, China
| | - Jun Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy Sciences, Nanjing, 210008, China.
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Yang Z, Zhang N, Sun B, Su S, Wang Y, Zhang Y, Wu C, Zeng X. Contradictory tendency of As(V) releasing from Fe-As complexes: Influence of organic and inorganic anions. CHEMOSPHERE 2022; 286:131469. [PMID: 34340118 DOI: 10.1016/j.chemosphere.2021.131469] [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: 04/18/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The strong ability of ferrihydrite and its aged minerals for fixing arsenate is a key factor in remediating arsenate-polluted environments. It is therefore crucial to clarify the stability of Fe-As complexes and the release conditions for As(V). The As(V) release amount was evaluated and compared in the presence of six representative anions, namely, phosphate, silicate, sulfate, inositol hexaphosphate, citrate, and oxalate. It was found that the As(V) release amount changed with the aging time of ferrihydrite and that this tendency generally followed two rules. These are, longer aging time leads to lower As(V) release (Rule 1), and longer aging time leads to higher As(V) release (Rule 2). Whether Rule 1 or Rule 2 dominated As release depended on the number of surface groups, size of competing anions, and contribution of As(V) re-adsorption. Characterization results using X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) provided evidence for the predicted mechanisms of As(V) release under various circumstances. In this work, it was demonstrated that when inorganic anions such as sulfate and silicate are present, ferrihydrite with longer aging time led to decreased As(V) release. When organic anions are present, ferrihydrite with less aging time results in reduced As(V) leaching. For anions such as phosphate, the As(V) release amount in relation to the ferrihydrite aging time depends on the concentration of phosphate ions. Nevertheless, the ligand concentration and As(V) loading rate on ferrihydrite should be simultaneously considered for the rule governing As(V) releasing.
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Affiliation(s)
- Zhonglan Yang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China; College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Nan Zhang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China
| | - Benhua Sun
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Shiming Su
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China
| | - Yanan Wang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China
| | - Yang Zhang
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China
| | - Cuixia Wu
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China
| | - Xibai Zeng
- Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Beijing, 100081, China.
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11
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Souza TGF, Freitas ETF, Mohallem NDS, Ciminelli VST. Defects induced by Al substitution enhance As(V) adsorption on ferrihydrites. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126544. [PMID: 34252678 DOI: 10.1016/j.jhazmat.2021.126544] [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] [Received: 01/04/2021] [Revised: 06/14/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
An original rationale is proposed to explain the controversial role of aluminum, a common substitutive element in ferrihydrite (Fh), on arsenic adsorption. The adsorption of arsenic on synthetic Al-for-Fe substituted Fh (AlFh) with up to 20 mol% Al was investigated at pH 5 and 8. The reduced interplanar spacings observed by selected area electron diffraction show that all AlFh samples are isomorphically substituted up to 20 mol% Al. A 15 mol% Al incorporation increases the arsenic uptake by 28%. In contrast, the Langmuir binding constants decrease, suggesting weaker bonds. Arsenic uptake reduces by 50% as pH rises from 5 to 8. The Al-for-Fe substitution in ferrihydrite causes structural defects, proton-compensated by OH groups, as indicated by the Vegard rule deviation. X-ray photoelectron spectroscopy demonstrates the increase in the relative amount of surface M-OH sites (45% to 77%) with Al concentration (AlFh-0 to AlFh-20), respectively. The enhanced As(V) uptake was ascribed to the insertion of hydroxyls on the Fh structural defects. Fourier-transformed-infrared spectroscopy showed that the sites modified by Al introduction are involved in As adsorption. These findings help to understand aluminum's role in arsenic adsorption, fixation, and fate in the environment.
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Affiliation(s)
- Taiane G F Souza
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil
| | - Erico T F Freitas
- Centre of Microscopy, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil
| | - Nelcy D S Mohallem
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil
| | - Virginia S T Ciminelli
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
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12
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Ye C, Ariya PA, Fu F, Yu G, Tang B. Influence of Al(III) and Sb(V) on the transformation of ferrihydrite nanoparticles: Interaction among ferrihydrite, coprecipitated Al(III) and Sb(V). JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124423. [PMID: 33162243 DOI: 10.1016/j.jhazmat.2020.124423] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/15/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
Ferrihydrite is ubiquitous in natural environments and is usually co-precipitated with impure ions and toxic contaminants like Al(III) and Sb(V) during the neutralization process of acid mine drainage. However, little is known about the dynamic interactions among ferrihydrite, Al(III) and Sb(V). In this study, the influence of coprecipitated Al(III) and Sb(V) on the transformation of ferrihydrite was investigated. The samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and transmission electron microscopy before and after aging for 10 days at 70 °C. Results indicated that the Al(III) enhanced the immobilization of Sb(V) under neutral and alkaline conditions, and the presence of Sb(V) induced more production of extractable Al(III). XRD patterns revealed that the transformation rate of coprecipitated Al(III) and Sb(V) ferrihydrite was higher than Al-coprecipitated ferrihydrite. It is speculated that the presence of Sb(V) weakened the inhibition of Al(III) under experimental conditions. Competitive reaction of Al(III) and Sb(V) for substitution on the lattice Fe of ferrihydrite, likely decreased Al(III) substitution on ferrihydrite, and thus increased the observed transformation rate of ferrihydrite. These results have significant environmental implications for predicting the role of impurities and contaminants on ferrihydrite transformation processes.
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Affiliation(s)
- Chujia Ye
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Parisa A Ariya
- Department of Atmospheric & Oceanic Sciences, McGill University, Montreal, PQ H3A 0B9, Canada; Department of Chemistry, McGill University, Montreal, PQ H3A 0B8, Canada
| | - Fenglian Fu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guangda Yu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Bing Tang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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13
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Yang Z, Bai L, Su S, Wang Y, Wu C, Zeng X, Sun B. Stability of Fe-As composites formed with As(V) and aged ferrihydrite. J Environ Sci (China) 2021; 100:43-50. [PMID: 33279052 DOI: 10.1016/j.jes.2020.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/24/2020] [Accepted: 07/08/2020] [Indexed: 06/12/2023]
Abstract
During the aging process, ferrihydrite was transformed into mineral mixtures composed of different proportions of ferrihydrite, goethite, lepidocrocite and hematite. Such a transformation may affect the fixed ability of arsenic. In this study, the stability of Fe-As composites formed with As(V) and the minerals aged for 0, 1, 4, 10 and 30 days of ferrihydrite were systematically examined, and the effects of molar of ratios Fe/As were also clarified using kinetic methods combined with multiple spectroscopic techniques. The results indicated that As(V) was rapidly adsorbed on minerals during the initial polymerization process, which delayed both the ferrihydrite conversion and the hematite formation. When the Fe/As molar ratio was 1.875 and 5.66, the As(V) adsorbed by ferrihydrite began to release after 6 hr and 12 hr, respectively. The corresponding release amounts of As(V) were 0.55 g/L and 0.07 g/L, and the adsorption rates were 92.43% and 97.50% at 60 days, respectively. However, the As(V) adsorbed by the transformation products aged for 30 days of ferrihydrite began to release after adsorbed 30 days. The corresponding release amounts of As(V) were 0.25 g/L and 0.03 g/L, and the adsorption rates were 84.23% and 92.18% after adsorbed 60 days, for the Fe/As=1.875 and 5.66, respectively. Overall, the combination of As(V) with ferrihydrite and aged products transformed from a thermodynamically metastable phase to a dynamically stable state within a certain duration. Moreover, the aging process of ferrihydrite reduced the sorption ability of arsenate by iron (hydr)oxide but enhanced the stability of the Fe-As composites.
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Affiliation(s)
- Zhonglan Yang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Lingyu Bai
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Shiming Su
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Yanan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Cuixia Wu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Xibai Zeng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.
| | - Benhua Sun
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
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Shi M, Min X, Ke Y, Lin Z, Yang Z, Wang S, Peng N, Yan X, Luo S, Wu J, Wei Y. Recent progress in understanding the mechanism of heavy metals retention by iron (oxyhydr)oxides. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 752:141930. [PMID: 32892052 DOI: 10.1016/j.scitotenv.2020.141930] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/15/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
Heavy metals are widespread toxic environmental pollutants that can generate enormous health and public concern. Iron (oxyhydr)oxides are ubiquitous in both natural and engineered environments and have great retention capacity of heavy metals due to their high surface areas and reactivity. The sequestration of heavy metal by iron (oxyhydr)oxides is one of the most vital geochemical/chemical processes controlling their environmental fate, transport, and bioavailability. In this review, some of the common iron (oxyhydr)oxides are introduced in detail in terms of their formation, occurrence, structure characteristics and interaction with heavy metals. Moreover, the retention mechanisms of metal cations (e.g., Pb, Cu, Cd, Ni, Zn), metal oxyanions (e.g., As, Sb, Cr), and coexisting multiple metals on various iron (oxyhydr)oxides are fully reviewed. Principal mechanisms of surface complexation, surface precipitation and structural incorporation are responsible for heavy metal retention on iron (oxyhydr)oxides, and greatly dependent on mineral species, metal ion species, reacting conditions (i.e., pH, heavy metal concentration, ionic strength, etc.) and chemical process (i.e., adsorption, coprecipitaton and mineral phase transformation process). The retention mechanisms summarized in this review would be helpful for remediating heavy metal contamination and predicting the long-term behavior of heavy metal in natural and engineered environments.
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Affiliation(s)
- Meiqing Shi
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Xiaobo Min
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Yong Ke
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Zhang Lin
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Zhihui Yang
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Sheng Wang
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Ning Peng
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Xu Yan
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha 410004, China.
| | - Shuang Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jiahui Wu
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Yangjin Wei
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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Pieczara G, Manecki M, Rzepa G, Borkiewicz O, Gaweł A. Thermal Stability and Decomposition Products of P-Doped Ferrihydrite. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4113. [PMID: 32947936 PMCID: PMC7560356 DOI: 10.3390/ma13184113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/09/2020] [Accepted: 09/14/2020] [Indexed: 11/29/2022]
Abstract
This work aimed to determine the effect of various amounts of P admixtures in synthetic ferrihydrite on its thermal stability, transformation processes, and the properties of the products, at a broad range of temperatures up to 1000 °C. A detailed study was conducted using a series of synthetic ferrihydrites Fe5HO8·4H2O doped with phosphates at P/Fe molar ratios of 0.2, 0.5, and 1.0. Ferrihydrite was synthesized by a reaction of Fe2(SO4)3 with 1 M KOH at room temperature in the presence of K2HPO4 at pH 8.2. The products of the synthesis and the products of heating were characterized at various stages of transformation by using differential thermal analysis accompanied with X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive X-ray spectroscopy. Coprecipitation of P with ferrihydrite results in the formation of P-doped 2-line ferrihydrite. A high P content reduces crystallinity. Phosphate significantly inhibits the thermal transformation processes. The temperature of thermal transformation increases from below 550 to 710-750 °C. Formation of intermediate maghemite and Fe-phosphates, is observed. The product of heating up to 1000 °C contains hematite associated with rodolicoite FePO4 and grattarolaite Fe3PO7. Higher P content greatly increases the thermal stability and transformation temperature of rodolicoite as well.
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Affiliation(s)
- Gabriela Pieczara
- Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland; (G.P.); (G.R.); (A.G.)
| | - Maciej Manecki
- Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland; (G.P.); (G.R.); (A.G.)
| | - Grzegorz Rzepa
- Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland; (G.P.); (G.R.); (A.G.)
| | - Olaf Borkiewicz
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA;
| | - Adam Gaweł
- Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland; (G.P.); (G.R.); (A.G.)
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16
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Chen A, Li Y, Shang J, Arai Y. Ferrihydrite Transformation Impacted by Coprecipitation of Phytic Acid. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8837-8847. [PMID: 32544325 DOI: 10.1021/acs.est.0c02465] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Phytic acid is a common phosphate monoester that is present in soils due to the deposition of plant-derived materials. Thus far, its interaction with dissolved Fe and Fe minerals has not been as extensively investigated as phosphate, although it is expected be highly reactive due to its multiple phosphate functional groups. In this study, the effects of phytic acid on the formation of iron oxyhydroxide was investigated at near neutral pH as a function of the phytic acid/Fe ratio (0.05-0.5) and aging time using zeta potential measurements, X-ray diffraction, Fe K-edge X-ray absorption spectroscopy, and scanning electron transmission spectroscopy. It was found that an iron(III) phytate-like precipitate was formed when the phytic acid/Fe ratio was as low as 0.05. On increasing the ratio to 0.5, the quantity of iron(III) phytate-like precipitate increased to ∼60% in the ferrihydrite background. Interestingly, 10 month aging at 22 °C or hydrothermal treatment at 70 °C for 60 h did not transform the background ferrihydrite into goethite or hematite, suggesting the adsorbed phytic acid played an important role in inhibiting the transformation of ferrihydrite. The adsorption and incorporation of phytic acid into the Fe(III)O6 polymers should be useful in understanding the complex phosphorus, iron, and hard acid chemistry in a terrestrial environment.
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Affiliation(s)
- Ai Chen
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ying Li
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jianying Shang
- Department of Soil and Water Sciences, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yuji Arai
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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17
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Zhang D, Wang S, Gomez MA, Wang Y, Jia Y. The long-term stability of Fe III-As V coprecipitates at pH 4 and 7: Mechanisms controlling the arsenic behavior. JOURNAL OF HAZARDOUS MATERIALS 2019; 374:276-286. [PMID: 31009892 DOI: 10.1016/j.jhazmat.2019.04.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/30/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Hydrometallurgical FeIII-AsV coprecipitates, which are amorphous in nature, could re-crystallize gradually and pose risks of contamination to the environment. However, the mechanisms controlling the As behavior when the FeIII-AsV coprecipitates stored at different pHs is still not fully understood. This work systematically investigated the fate of As and the transformation process of the coprecipitates (Fe/As = ˜4) at different pHs and temperatures. XRD, EXAFS, HRTEM, and chemical extraction methods were employed to characterize the crystallinity degrees and the transformation products of the coprecipitates. The results showed that the coprecipitates are more stable at acidic pH than at neutral pH. For those samples aged at pH 4, the arsenic speciation includes poorly crystalline ferric arsenate (PCFA) and As adsorbed on 2-line ferrihydrite (Fh). Due to the presence of PCFA, the Fe/As molar ratio for the latter phase is much higher than the bulk Fe/As molar ratio (˜4 in this work) of the coprecipitates and controls As release. However, for those samples aged at pH 7, due to the fact that 2-line Fh is the major As-bearing phase, slight changes of the crystallinity degrees of 2-line Fh will trigger As release.
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Affiliation(s)
- Danni Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Shaofeng Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
| | - Mario A Gomez
- Institute of Environmental Protection, Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Ying Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Yongfeng Jia
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
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18
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Yuan Z, Zhang G, Lin J, Zeng X, Ma X, Wang X, Wang S, Jia Y. The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio. CHEMOSPHERE 2019; 218:670-679. [PMID: 30504042 DOI: 10.1016/j.chemosphere.2018.11.142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/19/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
The potential hazards of Fe(III)-As(V) co-precipitate under reducing conditions are incompletely known. This work investigated the effect of Fe(III) reduction by ascorbic acid (AH2) on the stability of Fe(III)-As(V) co-precipitate at different pHs and Fe/As molar ratios. The results showed that As (14-98.9%) and Fe (27.9-99.3%) were significantly released into solution by 79.9-97.5% Fe(III) reduction of the co-precipitate (Fe/As molar ratios of 3 and 5) at pH 5-9. More As release was observed with the increase of pH (6-9) or decrease in Fe/As molar ratio (from 5 to 3). This could be attributed by oxalate, the final product of AH2 decomposition, which strongly competed with As(V) for Fe(II) at higher pH or lower Fe/As molar ratio, inhibiting parasymplesite accumulation and then causing more As mobilization. The stability of Fe(III)-As(V) co-precipitate with AH2 upon Fe(III) reduction was lower than that in oxic environment. Compared with produced Fe(II,III) (hydr)oxides in the presence of hydroquinone (QH2), humboldtine was formed during the long-term reactions of Fe(III)-As(V) co-precipitate with AH2. The findings of this study implied that parasymplesite and humboldtine as secondary solid products were environmental relevant and mainly responsible for As(V) and Fe(II) immobilization.
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Affiliation(s)
- Zidan Yuan
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Guoqing Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jinru Lin
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Xiangfeng Zeng
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Xu Ma
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Xin Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Shaofeng Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Yongfeng Jia
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Hu S, Lu Y, Peng L, Wang P, Zhu M, Dohnalkova AC, Chen H, Lin Z, Dang Z, Shi Z. Coupled Kinetics of Ferrihydrite Transformation and As(V) Sequestration under the Effect of Humic Acids: A Mechanistic and Quantitative Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:11632-11641. [PMID: 30230819 DOI: 10.1021/acs.est.8b03492] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In natural environments, kinetics of As(V) sequestration/release is usually coupled with dynamic Fe mineral transformation, which is further influenced by the presence of natural organic matter (NOM). Previous work mainly focused on the interactions between As(V) and Fe minerals. However, there is a lack of both mechanistic and quantitative understanding on the coupled kinetic processes in the As(V)-Fe mineral-NOM system. In this study, we investigated the effect of humic acids (HA) on the coupled kinetics of ferrihydrite transformation into hematite/goethite and sequestration of As(V) on Fe minerals. Time-resolved As(V) and HA interactions with Fe minerals during the kinetic processes were studied using aberration-corrected scanning transmission electron microscopy, chemical extractions, stirred-flow kinetic experiments, and X-ray absorption spectroscopy. Based on the experimental results, we developed a mechanistic kinetics model for As(V) fate during Fe mineral transformation. Our results demonstrated that the rates of As(V) speciation changes within Fe minerals were coupled with ferrihydrite transformation rates, and the overall reactions were slowed down by the presence of HA that sorbed on Fe minerals. Our kinetics model is able to account for variations of Fe mineral compositions, solution chemistry, and As(V) speciation, which has significant environmental implications for predicting As(V) behavior in the environment.
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Affiliation(s)
- Shiwen Hu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Yang Lu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Lanfang Peng
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Pei Wang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management , University of Wyoming , Laramie , Wyoming 82071 , United States
| | - Alice C Dohnalkova
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Hong Chen
- SLAC National Accelerator Laboratory , Stanford University , Menlo Park , California 94025 , United States
| | - Zhang Lin
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Zhi Dang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Zhenqing Shi
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
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20
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Jarosite and Alunite in Ancient Terrestrial Sedimentary Rocks: Reinterpreting Martian Depositional and Diagenetic Environmental Conditions. Life (Basel) 2018; 8:life8030032. [PMID: 30081459 PMCID: PMC6160914 DOI: 10.3390/life8030032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 12/01/2022] Open
Abstract
Members of the alunite group are precipitated at low pH (<1 to ~4) in oxidizing environments, are unstable in circumneutral conditions, and are widespread on Mars. At Mollies Nipple in Kane County, Utah, USA, jarosite and alunite are abundant as diagenetic cements in Jurassic sandstones. This research characterizes the jarosite and alunite cements with the goal of determining their origin, and tests the hypothesis that jarosite and alunite may be more stable than the current understanding indicates is possible. Previous studies have placed the jarosite- and alunite-bearing caprock at Mollies Nipple in the Navajo Sandstone, but the presence of water-lain deposits, volcanic ash, volcanic clasts, and peloids show that it is one of the overlying Middle Jurassic units that records sea level transgressions and regressions. A paragenetic timing, established from petrographic methods, shows that much of the cement was precipitated early in a marginal marine to coastal dune depositional environment with a fluctuating groundwater table that drove ferrolysis and evolved the groundwater to a low pH. Microbial interaction was likely a large contributor to the evolution of this acidity. Jarosite and alunite are clearly more stable in natural environments than is predicted by laboratory experiments, and therefore, the Martian environments that have been interpreted as largely acidic and/or dry over geologic time may have been more habitable than previously thought.
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Jeong S, Yang K, Jho EH, Nam K. Importance of chemical binding type between As and iron-oxide on bioaccessibility in soil: Test with synthesized two line ferrihydrite. JOURNAL OF HAZARDOUS MATERIALS 2017; 330:157-164. [PMID: 28242536 DOI: 10.1016/j.jhazmat.2017.02.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/05/2017] [Accepted: 02/06/2017] [Indexed: 06/06/2023]
Abstract
Bioaccessible concentrations of As associated with Fe oxide as different chemical binding types were determined in soils using the in vitro Physiologically Based Extraction Test (PBET). When compared to the five-step sequential extraction data, most of the As extracted by in vitro PBET originated from the amorphous Fe oxide-bound fraction, and more importantly, the bioaccessibility of As ranged from 0 to 58.8% in 24 soil samples. Two batches of ferrihydrite were synthesized separately. For one batch, As was adsorbed onto the ferrihydrite after synthesis; for the other one, As was added while synthesizing ferrihydrite to co-precipitate. The bioaccessible concentration of As determined by in vitro PBET of the former was 415mg of As/kg of ferrihydrite and that of the latter was 67mg of As/kg of ferrihydrite. X-ray photoelectron spectra (XPS) analysis indicated that As-O-Fe bonds were evident in As-associated ferrihydrite sample and especially, As was found within the Fe oxide lattice in the co-precipitated sample. Our data suggest that binding type between As and Fe oxide should be considered when determining the bioaccessibility of As in soil, which, in turn, greatly influences the realistic risk of As present in soil.
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Affiliation(s)
- Seulki Jeong
- Seoul Center, Korea Basic Science Institute, 6-7, Inchon-ro 22-gil, Seongbuk-gu, Seoul 02855, Republic of Korea
| | - Kyung Yang
- Division of Public Infrastructure Assessment, Environmental Assessment Group, Korea Environmental Institute, Sejong 30147, Republic of Korea
| | - Eun Hea Jho
- Department of Environmental Science, Hankuk University of Foreign Studies, 81 Oedae-ro, Mohyeonmyeon, Cheoin-gu, Yongin-si, Gyeonggi-do 17035, Republic of Korea
| | - Kyoungphile Nam
- Department of Civil and Environmental Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea.
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Freitas ETF, Stroppa DG, Montoro LA, de Mello JWV, Gasparon M, Ciminelli VST. Arsenic entrapment by nanocrystals of Al-magnetite: The role of Al in crystal growth and As retention. CHEMOSPHERE 2016; 158:91-99. [PMID: 27258899 DOI: 10.1016/j.chemosphere.2016.05.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/05/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
The nature of As-Al-Fe co-precipitates aged for 120 days are investigated in detail by High Resolution Transmission Electron Microscopy (HRTEM), Scanning TEM (STEM), electron diffraction, Energy Dispersive X-Ray Spectroscopy (EDS), Electron Energy-Loss Spectroscopy (EELS), and Energy Filtered Transmission Electron Microscopy (EFTEM). The Al present in magnetite is shown to favour As incorporation (up to 1.10 wt%) relative to Al-free magnetite and Al-goethite, but As uptake by Al-magnetite decreases with increasing Al substitution (3.53-11.37 mol% Al). Arsenic-bearing magnetite and goethite mesocrystals (MCs) are formed by oriented aggregation (OA) of primary nanoparticles (NPs). Well-crystalline magnetite likely formed by Otswald ripening was predominant in the Al-free system. The As content in Al-goethite MCs (having approximately 13% substituted Al) was close to the EDS detection limit (0.1 wt% As), but was below detection in Al-goethites with 23.00-32.19 mol% Al. Our results show for the first time the capacity of Al-magnetite to incorporate more As than Al-free magnetite, and the role of Al in favouring OA-based crystal growth under the experimental conditions, and therefore As retention in the formed MCs. The proposed mechanism of As incorporation involves adsorption of As onto the newly formed NPs. Arsenic is then trapped in the MCs as they grow by self-assembly OA upon attachment of the NPs. We conclude that Al may diffuse to the crystal faces with high surface energy to reduce the total energy of the system during the attachment events, thus favouring the oriented aggregation.
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Affiliation(s)
- Erico T F Freitas
- Universidade Federal de Minas Gerais, Center of Microscopy, Belo Horizonte 31270901, Brazil; The University of Queensland, School of Earth Sciences, St Lucia 4072, Australia; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Daniel G Stroppa
- International Iberian Nanotechnology Laboratory, Braga 4715330, Portugal.
| | - Luciano A Montoro
- Universidade Federal de Minas Gerais, Department of Chemistry, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Jaime W V de Mello
- Universidade Federal de Viçosa, Department of Soils, Viçosa 36570900, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Massimo Gasparon
- The University of Queensland, School of Earth Sciences, St Lucia 4072, Australia; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Virginia S T Ciminelli
- Universidade Federal de Minas Gerais, Department of Metallurgical Engineering, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
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Pariona N, Camacho-Aguilar KI, Ramos-González R, Martinez AI, Herrera-Trejo M. Structural Characterization of Ferrihydrite/Hematite Nanocomposites and Their Arsenic Adsorption Properties. ADSORPT SCI TECHNOL 2015. [DOI: 10.1260/0263-6174.33.10.871] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Nicolaza Pariona
- Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav-Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila 25900, Mexico
| | - Karla I. Camacho-Aguilar
- Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav-Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila 25900, Mexico
| | - Rodolfo Ramos-González
- Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav-Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila 25900, Mexico
| | - Arturo I. Martinez
- Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav-Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila 25900, Mexico
| | - Martin Herrera-Trejo
- Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav-Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe, Coahuila 25900, Mexico
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Freitas ETF, Montoro LA, Gasparon M, Ciminelli VST. Natural attenuation of arsenic in the environment by immobilization in nanostructured hematite. CHEMOSPHERE 2015; 138:340-347. [PMID: 26126189 DOI: 10.1016/j.chemosphere.2015.05.101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/13/2015] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
Iron (hydr)oxides are known to play a major role in arsenic fixation in the environment. The mechanisms for long-term fixation into their crystal structure, however, remain poorly understood, especially arsenic partitioning behavior during transformation from amorphous to crystalline phases under natural conditions. In this study, these mechanisms are investigated in Fe-Al-oxisols exposed over a period of 10 years to a sulfide concentrate in tailings impoundments. The spatial resolution necessary to investigate the markedly heterogeneous nanoscale phases found in the oxisols was achieved by combining three different, high resolution electron microscopy techniques - Nano-Beam Electron Diffraction (NBD), Electron Energy-Loss Spectroscopy (EELS), and High Resolution Transmission Electron Microscopy (HRTEM). Arsenic (1.6±0.5 wt.%) was unambiguously and precisely identified in mesocrystals of Al-hematite with an As/Fe atomic ratio of 0.026±0.006. The increase in the c-axis (c=1.379±0.009 nm) compared to standard hematite (c=1.372 nm) is consistent with the presence of arsenic in the Al-hematite structure. The As-bearing Al-hematite is interpreted as a secondary phase formed from oxyhydroxides, such as ferrihydrite, during the long-term exposure to the sulfide tailings. The proposed mechanism of arsenic fixation in the Al-hematite structure involves adsorption onto Al-ferrihydrite nanoparticles, followed by Al-ferrihydrite aggregation by self-assembly oriented attachment and coalescence that ultimately produces Al-hematite mesocrystals. Our results illustrate for the first time the process of formation of stable arsenic bearing Al-hematite for the long-term immobilization of arsenic in environmental samples.
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Affiliation(s)
- Erico T F Freitas
- Centre of Microscopy, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Luciano A Montoro
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Massimo Gasparon
- School of Earth Sciences, The University of Queensland, Brisbane 4072, Australia; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
| | - Virginia S T Ciminelli
- Department of Metallurgical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte 31270901, Brazil; National Institute of Science and Technology on Minerals Resources, Water and Biodiversity, INCT-Acqua, Brazil.
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