1
|
Amiel N, Dror I, Berkowitz B. Mobility of Rare Earth Elements in Coastal Aquifer Materials under Fresh and Brackish Water Conditions. ACS ENVIRONMENTAL AU 2024; 4:186-195. [PMID: 39035866 PMCID: PMC11258752 DOI: 10.1021/acsenvironau.4c00001] [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: 01/06/2024] [Revised: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 07/23/2024]
Abstract
The indispensable role of rare earth elements (REEs) in manufacturing high-tech products and developing various technologies has resulted in a surge in REE extraction and processing. The latter, in turn, intensifies the release of anthropogenic REEs into the environment, particularly in the groundwater system. REE contamination in coastal aquifer systems, which serve as drinking and domestic water sources for large populations, demands a thorough understanding of the mechanisms that govern REE transport and retention in these environments. In this study, we conducted batch and column experiments using five representative coastal aquifer materials and an acid-wash sand sample as a benchmark. These experiments were conducted by adding humic acid (HA) to the REE solution under fresh and brackish water conditions using NaCl, representing different groundwater compositions in coastal aquifers. The REEs were shown to be most mobile in the acid-wash sand and natural sand samples, followed by two types of low-carbonate calcareous sandstone and one type of high-calcareous sandstone and the least mobile in red loamy sand. The mobility of REEs, found in solution primarily as REE-HA complexes, was controlled mainly by the retention of HA, which increases with increasing ionic strength and surface area of the aquifer material. Furthermore, it was found that the presence of carbonate and clay minerals reduces the REE mobility due to enhanced surface interactions. The higher recoveries of middle-REE (MREE) in the column experiment effluents observed for the acid-wash sand and natural sand samples were due to the higher stabilization of MREE-HA complexes compared to light-REE (LREE) and heavy-REE (HREE) HA complexes. Higher HREE recoveries were observed for the calcareous sandstones due to the preferred complexation of HREE with carbonate ions and for the red loamy sand due to the preferred retention of LREE and MREE by clay, iron, and manganese minerals.
Collapse
Affiliation(s)
- Nitai Amiel
- Department of Earth and Planetary
Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ishai Dror
- Department of Earth and Planetary
Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Brian Berkowitz
- Department of Earth and Planetary
Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| |
Collapse
|
2
|
González N, Domingo JL. Levels of Rare Earth Elements in Food and Human Dietary Exposure: A Review. Biol Trace Elem Res 2024:10.1007/s12011-024-04297-z. [PMID: 38970711 DOI: 10.1007/s12011-024-04297-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/29/2024] [Indexed: 07/08/2024]
Abstract
Rare earth elements (REEs) are a group consisting of the following 17 metals: Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Pm, Sc, Sm, Tb, Tm, Y and Yb. In the current century, the number of applications of REEs has significantly increased. They are being used as components in high technology devices of great importance industrial/economic. However, information on the risk of human exposure to REEs, as well as the potential toxic effects of these elements is still limited. In general terms, dietary intake is the main route of exposure to metals for non-occupationally exposed individuals, which should be also expected for REEs. The current paper aimed at reviewing the studies -conducted over the world- that focused on determining the levels of REEs in foods, as well as the dietary intake of these elements. Most studies do not suggest potential health risk for consumers of freshwater and marine species of higher consumption, or derived from the intake of a number of vegetables, fruits, mushrooms, as well as other various foodstuffs (honey, tea, rice, etc.). The current estimated daily intake (EDI) of REEs does not seem to be of concern. However, considering the expected wide use of these elements in the next years, it seems to be clearly recommendable to assess periodically the potential health risk of the dietary exposure to REEs. This is already being done with well-known toxic elements such as As, Cd, Pb and Hg, among other potentially toxic metals.
Collapse
Affiliation(s)
- Neus González
- School of Medicine, Laboratory of Toxicology and Environmental Health, Universitat Rovira i Virgili, 43201, Reus, Catalonia, Spain
| | - Jose L Domingo
- School of Medicine, Laboratory of Toxicology and Environmental Health, Universitat Rovira i Virgili, 43201, Reus, Catalonia, Spain.
| |
Collapse
|
3
|
Barrat JA, Bayon G. Practical guidelines for representing and interpreting rare earth abundances in environmental and biological studies. CHEMOSPHERE 2024; 352:141487. [PMID: 38373443 DOI: 10.1016/j.chemosphere.2024.141487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/20/2024] [Accepted: 02/15/2024] [Indexed: 02/21/2024]
Abstract
This paper summarizes the main guidelines for representing rare earth element (REE) abundance patterns, along with a review of the common mistakes or omissions that can alter REE plots and bias interpretations. It is specifically designed for ecotoxicologists and biologists, for whom the study of these elements has become an important field of research in recent years. Prior to applying REE diagrams to the study of living organisms, it is important to understand the rationale that led geochemists and cosmochemists to develop them. Used with the practical recommendations described here, these diagrams have the capacity to highlight fundamental processes taking place in the biosphere.
Collapse
Affiliation(s)
- Jean-Alix Barrat
- Univ Brest, CNRS, Ifremer, IRD, LEMAR, Institut Universitaire Européen de la Mer (IUEM), Place Nicolas Copernic, 29280, Plouzané, France; Institut Universitaire de France, Paris, France.
| | - Germain Bayon
- Univ Brest, CNRS, Ifremer, Geo-Ocean, F-29280, Plouzané, France
| |
Collapse
|
4
|
Guillot A, Barrat JA, Olivier F, Tremblay R, Saint-Louis R, Rouget ML, Ben Salem D. Trace element variations in mussels' shells from continent to sea: The St. Lawrence system, Canada. MARINE POLLUTION BULLETIN 2024; 199:116034. [PMID: 38237244 DOI: 10.1016/j.marpolbul.2024.116034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 02/08/2024]
Abstract
Rare Earth Elements (REE) and several trace elements abundances in mussel's shells collected along the St. Lawrence River, the Estuary, and the Gulf of St. Lawrence (EGSL) reveal coherent chemical variations, with a sharp contrast between freshwater and seawater bivalves. In freshwater mussel's shells, Rare Earth Elements and Y (REY) patterns are rather flat. Their Mn and Ba concentrations are higher than those of EGSL mussel shells, which are much richer in Sr. Shale-normalized REY abundances in mussel's shells from the EGSL show positive anomalies in La and Y and well-marked negative anomalies in Ce, reflecting those of seawater. Prince Edward Island shells show light REE depletion relative to PAAS, positive La and Y anomalies, and negative Ce anomalies. Our data confirm the lack of detectable Gd pollution in the St. Lawrence River and in the EGSL, as well as Pb pollution at the mouth of the Saguenay Fjord and near Rimouski.
Collapse
Affiliation(s)
- Alice Guillot
- Univ Brest, CNRS, Ifremer, IRD, LEMAR, Institut Universitaire Européen de la Mer (IUEM), Place Nicolas Copernic, 29280 Plouzané, France; Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada.
| | - Jean-Alix Barrat
- Univ Brest, CNRS, Ifremer, IRD, LEMAR, Institut Universitaire Européen de la Mer (IUEM), Place Nicolas Copernic, 29280 Plouzané, France; Institut Universitaire de, France, Paris
| | - Frédéric Olivier
- Biologie des Organismes et Écosystèmes Aquatiques (BOREA) UMR 8067 MNHN, CNRS SU, IRD 207, UCN, UA, 61 Rue Buffon CP 53, 75005 Paris, France
| | - Réjean Tremblay
- Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada
| | - Richard Saint-Louis
- Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada
| | - Marie-Laure Rouget
- Univ Brest, CNRS UMS 3113, Institut Universitaire Européen de la Mer (IUEM), 29280 Plouzané, France
| | - Douraied Ben Salem
- LaTIM (INSERM UMR 1101) Université de Bretagne Occidentale, 22, Avenue C. Desmoulins, 29238 Brest Cedex 3, France
| |
Collapse
|
5
|
Jung H, Su Z, Inaba Y, West AC, Banta S. Genetic Modification of Acidithiobacillus ferrooxidans for Rare-Earth Element Recovery under Acidic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:19902-19911. [PMID: 37983372 DOI: 10.1021/acs.est.3c05772] [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: 11/22/2023]
Abstract
As global demands for rare-earth elements (REEs) continue to grow, the biological recovery of REEs has been explored as a promising strategy, driven by potential economic and environmental benefits. It is known that calcium-binding domains, including helix-loop-helix EF hands and repeats-in-toxin (RTX) domains, can bind lanthanide ions due to their similar ionic radii and coordination preference to calcium. Recently, the lanmodulin protein from Methylorubrum extorquens was reported, which has evolved a high affinity for lanthanide ions over calcium. Acidithiobacillus ferrooxidans is a chemolithoautotrophic acidophile, which has been explored for use in bioleaching for metal recovery. In this report, A. ferrooxidans was engineered for the recombinant intracellular expression of lanmodulin. In addition, an RTX domain from the adenylate cyclase protein of Bordetella pertussis, which has previously been shown to bind Tb3+, was expressed periplasmically via fusion with the endogenous rusticyanin protein. The binding of lanthanides (Tb3+, Pr3+, Nd3+, and La3+) was improved by up to 4-fold for cells expressing lanmodulin and 13-fold for cells expressing the RTX domains in both pure and mixed metal solutions. Interestingly, the presence of lanthanides in the growth media enhanced protein expression, likely by influencing protein stability. Both engineered cell lines exhibited higher recoveries and selectivities for four tested lanthanides (Tb3+, Pr3+, Nd3+, and La3+) over non-REEs (Fe2+ and Co2+) in a synthetic magnet leachate, demonstrating the potential of these new strains for future REE reclamation and recycling applications.
Collapse
Affiliation(s)
- Heejung Jung
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| | - Zihang Su
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| | - Yuta Inaba
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| | - Alan C West
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| | - Scott Banta
- Department of Chemical Engineering, Columbia University, 500 West 120th Street, New York, New York 10027, United States
| |
Collapse
|
6
|
Pereira WVDS, Ramos SJ, Melo LCA, Dias YN, Martins GC, Ferreira LCG, Fernandes AR. Human and environmental exposure to rare earth elements in gold mining areas in the northeastern Amazon. CHEMOSPHERE 2023; 340:139824. [PMID: 37586491 DOI: 10.1016/j.chemosphere.2023.139824] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 08/09/2023] [Accepted: 08/12/2023] [Indexed: 08/18/2023]
Abstract
Rudimentary methods are used to exploit gold (Au) in several artisanal mines in the Amazon, producing hazardous wastes that may pose risks of contamination by rare earth elements (REEs). The objectives of this study were to quantify the concentrations of REEs and assess their environmental and human health risks in artisanal Au mining areas in the northeastern Amazon. Thus, 25 samples of soils and mining wastes were collected in underground, colluvial, and cyanidation exploration sites, as well as in a natural forest that was considered as a reference area. The concentrations of REEs were quantified using alkaline fusion and inductively coupled plasma mass spectrometry, and the results were used to estimate pollution indices and risks associated with the contaminants. All REEs showed higher concentrations in waste deposition areas than in the reference area, especially Ce, Sc, Nd, La, Pr, Sm, and Eu. Pollution and enrichment levels were higher in the underground and cyanidation mining areas, with very high contamination factors (6.2-27) for Ce, Eu, La, Nd, Pr, Sm, and Sc, and significant to very high enrichment factors (5.5-20) for Ce, La, Nd, Pr, and Sc. The ecological risk indices varied from moderate (167.3) to high (365.7) in the most polluted sites, but risks to human health were low in all areas studied. The results of this study indicate that artisanal Au mining has the potential to cause contamination, enrichment, and ecological risks by REEs in the northeastern Amazon. Mitigation measures should be implemented to protect the environment from the negative impacts of these contaminants.
Collapse
Affiliation(s)
- Wendel Valter da Silveira Pereira
- Institute of Agricultural Sciences, Federal Rural University of the Amazon, 66077-830, Belém, Pará, Brazil; Vale Institute of Technology - Sustainable Development, 66055-090, Belém, Pará, Brazil.
| | - Sílvio Junio Ramos
- Vale Institute of Technology - Sustainable Development, 66055-090, Belém, Pará, Brazil
| | - Leônidas Carrijo Azevedo Melo
- Department of Soil Science, School of Agricultural Sciences, Federal University of Lavras, 37200-900, Lavras, Minas Gerais, Brazil
| | - Yan Nunes Dias
- Vale Institute of Technology - Sustainable Development, 66055-090, Belém, Pará, Brazil
| | | | | | | |
Collapse
|
7
|
Gu YG, Wang XN, Wang ZH, Jordan RW, Jiang SJ. Rare earth elements in sediments from a representative Chinese mariculture bay: Characterization, DGT-based bioaccessibility, and probabilistic ecological risk. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 335:122338. [PMID: 37558198 DOI: 10.1016/j.envpol.2023.122338] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
Rare earth elements (REEs) are emerging contaminants due to their worldwide exploitation in the high-technology sector. Aquaculture systems, particularly those located within coastal areas, are fragile ecosystems due to anthropogenic impacts regarding urban and aquaculture activities. However, to date, there are no reports on the combined toxicity of rare earth element (REE) mixtures on aquatic biota in sediments from coastal aquaculture systems. In this study, the combined toxicity of REE mixtures based on probabilistic risk assessment indicated that the surface sediments of Zhelin Bay had a 1.86% probability of toxic effects on aquatic biota. The average value of total REEs (TREEs) was 297.37 μg/g, with light REEs representing the major part. A factor analysis (FA)-geographic information system (GIS)-based approach coupled with correlation analysis (CA) revealed that the REEs are derived from anthropogenic sources through fluvial processes.
Collapse
Affiliation(s)
- Yang-Guang Gu
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; Faculty of Science, Yamagata University, Yamagata, 990-8560, Japan; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China; Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou, 510300, 510300, China; Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou, 510300, China; Sanya Tropical Fisheries Research Institute, Sanya, 572025, China.
| | - Xu-Nuo Wang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Zeng-Huan Wang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Richard W Jordan
- Faculty of Science, Yamagata University, Yamagata, 990-8560, Japan
| | - Shi-Jun Jiang
- College of Oceanography, Hohai University, Nanjing, 245700, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China
| |
Collapse
|
8
|
Abdur Rahman M, Haque S, Athikesavan MM, Kamaludeen MB. A review of environmental friendly green composites: production methods, current progresses, and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16905-16929. [PMID: 36607568 DOI: 10.1007/s11356-022-24879-5] [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: 12/25/2021] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The growing concern about environmental damage and the inability to meet the demand for more versatile, environmentally friendly materials has sparked increasing interest in polymer composites derived from renewable and biodegradable plant-based materials, mainly from forests. These composites are mostly referred to as "green" and they can be widely employed in many industrial applications. Green composites are less harmful to the environment and could be potential substitutes for petroleum-based polymeric materials. It is helpful to limit usage of fossil oil assets by developing biopolymer matrices such as cellulose-reinforced biocomposites using renewable assets such as plant oils, carbohydrates, and proteins. This paper focuses on green composites processing utilizing a variety of naturally available resources, sustainable materials which are not detrimental to the environment, new scientific signs of progress in achieving green sustainable development, as well as nanotechnology and its environmental consequences. Additionally, the environmental impacts of different composite materials are examined in this paper, along with their production from eco-friendly materials. Moreover, the manufacturing aspects of green composites and some concerns related to their production are also discussed. The merits of green composite materials and valid reasons why they are a valuable substitute for the traditionally used composite materials are also covered.
Collapse
Affiliation(s)
- M Abdur Rahman
- Department of Mechanical Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-600048, Tamil Nadu, India.
| | - Serajul Haque
- Department of Mechanical Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-600048, Tamil Nadu, India
| | - Muthu Manokar Athikesavan
- Department of Mechanical Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-600048, Tamil Nadu, India
| | - Mohamed Bak Kamaludeen
- Department of Mechanical Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-600048, Tamil Nadu, India
| |
Collapse
|
9
|
Li Y, Zhang P, Li M, Shakoor N, Adeel M, Zhou P, Guo M, Jiang Y, Zhao W, Lou B, Rui Y. Application and mechanisms of metal-based nanoparticles in the control of bacterial and fungal crop diseases. PEST MANAGEMENT SCIENCE 2023; 79:21-36. [PMID: 36196678 DOI: 10.1002/ps.7218] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 09/16/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Nanotechnology is a young branch of the discipline generated by nanomaterials. Its development has greatly contributed to technological progress and product innovation in the field of agriculture. The antimicrobial properties of nanoparticles (NPs) can be used to develop nanopesticides for plant protection. Plant diseases caused by bacterial and fungal infestations are the main types of crop diseases. Once infected, they will seriously threaten crop growth, reduce yield and quality, and affect food safety, posing a health risk to humans. We reviewed the application of metal-based nanoparticles in inhibiting plant pathogenic bacteria and fungi, and discuss the antibacterial mechanisms of metal-based nanoparticles from two aspects: the direct interaction between nanoparticles and pathogens, and the indirect effects of inducing plant resilience to disease. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yuanbo Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Peng Zhang
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Mingshu Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Noman Shakoor
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Muhammad Adeel
- BNU-HKUST Laboratory of Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, China
| | - Pingfan Zhou
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Manlin Guo
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Yaqi Jiang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Weichen Zhao
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - BenZhen Lou
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Yukui Rui
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| |
Collapse
|
10
|
Lin Z, Tavares D, Pereira E, Rocha J. Microporous Framework (Nb, Fe)-Silicate with Much Potential to Remove Rare-Earth Elements from Waters. Chemistry 2022; 28:e202202435. [PMID: 36163545 PMCID: PMC10092455 DOI: 10.1002/chem.202202435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Indexed: 12/29/2022]
Abstract
Nanoparticles of a new small-pore metal silicate formulated as Na2.9 (Nb1.55 Fe0.45 )Si2 O10 ⋅ xH2 O and exhibiting the structure of previously reported Rb2 (Nb2 O4 )(Si2 O6 ) ⋅ H2 O have been synthesized under mild hydrothermal conditions. Replacement of the bulky Rb+ by smaller Na+ ions was accomplished by stabilizing the framework structure via partial occupancy of the Nb5+ sites by Fe3+ ions. Exploratory ion-exchange assays evidence the considerable potential of this new silicate to remove rare-earth elements from aqueous solutions.
Collapse
Affiliation(s)
- Zhi Lin
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Daniela Tavares
- Department of Chemistry, LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Eduarda Pereira
- Department of Chemistry, LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - João Rocha
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| |
Collapse
|
11
|
Vetrimani A, Geetha K, Angel Jemima E, Arulnathan N, Kim HS, Kathalingam A. Effect of the green synthesis of CuO plate-like nanoparticles on their photodegradation and antibacterial activities. Phys Chem Chem Phys 2022; 24:28923-28933. [PMID: 36416292 DOI: 10.1039/d2cp03531f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Green synthesis of copper oxide nanoparticles and its effects on photocatalytic dye degradation and antibacterial activities are reported. The synthesis of nanoparticles by green routes provides many advantages over chemical routes, including simplicity, cost-effectiveness, and fast processing route without using any costly or harmful chemicals. Tridax procumbense (coat buttons) plant root extract was used to synthesize copper oxide nanoparticles. The synthesized Tridax procumbense-copper oxide nanoparticles (TP-CuO NPs) were characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering spectroscopy (DLS), and X-ray diffraction (XRD) techniques. The synthesized TP-CuO NPs were applied for photocatalytic dye degradation and antibacterial activity studies. The TP-CuO NPs exhibited a maximum antibacterial activity at 500 μg mL-1 concentration against Staphylococcus aureus and E. coli showing inhibition zones of 7.5 mm and 7.2 mm, respectively. The photocatalytic ability of the TP-CuO was also tested against the textile dye Trypan blue (TB), and showed about 55% degradation after 48 h for 500 μg mL-1 CuO NP concentration, showing a concentration-dependent degradation efficiency. This is the first work on TP-derived CuO nanoparticles and their photocatalytic and antimicrobial applications. Overall, this study supports the superiority of green-synthesized TP-CuO NPs as photocatalytic and antimicrobial agents.
Collapse
Affiliation(s)
- A Vetrimani
- Nanotechnology Division, Department of Biotechnology, Periyar Maniammai Institute of Science and Technology, Vallam, Thanjavur, Tamil Nadu, India
| | - K Geetha
- Nanotechnology Division, Department of Biotechnology, Periyar Maniammai Institute of Science and Technology, Vallam, Thanjavur, Tamil Nadu, India
| | - E Angel Jemima
- Trichy Research Institute of Biotechnology Private Limited, Tiruchirappalli, Tamil Nadu, India
| | - N Arulnathan
- Department of Animal Nutrition, Veterinary College and Research Institute, Tirunelveli, Tamil Nadu, India
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - A Kathalingam
- Millimeter-wave Innovation Technology (MINT) Research Center, Dongguk University-Seoul, Seoul, 04620, Republic of Korea.
| |
Collapse
|
12
|
Amiel N, Dror I, Berkowitz B. Mobility and Retention of Rare Earth Elements in Porous Media. ACS OMEGA 2022; 7:19491-19501. [PMID: 35722013 PMCID: PMC9202298 DOI: 10.1021/acsomega.2c01180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
There is growing concern that rare earth elements (REEs) will become emerging soil-water contaminants because of their increased use in new technologies and products, which may lead to unavoidable release to the environment. To better understand the environmental behavior of REEs, a comprehensive set of adsorption and column transport experiments was conducted in quartz sand media. The retention and mobility of three representative REEs (La, Gd, and Er) were studied in the presence and absence of humic acid (HA; 5, 20, and 50 mg L-1) and under a range of pH conditions (5-8). Results show that REE mobility and retention are controlled by the amount of REE-HA complexes formed in a solution, which increases with increasing HA concentrations and solution pH. Gadolinium is the most mobile among the representative REEs, followed by Er and La, corresponding to the amount of (calculated) REE-HA complexes. Increasing HA concentrations in the REE solution inhibits REE retention in both the batch adsorption and column experiments. The same retardation trend was observed for lower HA concentrations (Gd > Er > La). In a fixed HA concentration, HA and REE adsorption decrease simultaneously as the solution pH increases, indicating the co-adsorption of REEs and HA on the sand. Scanning electron microscopy detection of elongated regions attached to the sand, where high REE and carbon (HA) concentrations were measured, further suggests the co-adsorption of REE-HA complexes. Modeling the column experiments shows that the time-dependent attachment is dominant at high HA concentrations, while at lower HA concentrations, both the time-dependent and spontaneous attachments play equal roles. These results provide a quantitative characterization of REE retention and mobility in sand media.
Collapse
|
13
|
Hovey JL, Dittrich TM, Allen MJ. Coordination Chemistry of Surface-Associated Ligands for Solid–Liquid Adsorption of Rare-Earth Elements. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
14
|
Xiong Y, Yang X, Liu Y, Chen X, Wang G, Lu B, Lin G, Huang B. Fabrication of phosphorus doping porous carbon derived from bagasse for highly-efficient removal of La3+ ions via capacitive deionization. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|