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Wang W, Xu M, Wu H, Song Y, Liu P, Yu H, Zhang L, Chen S, Hua D. Precise Electrocatalysis on Fe-Porphyrin Conjugated Networks Achieves Energy-Efficient Extraction of Uranium. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2409084. [PMID: 39373360 DOI: 10.1002/advs.202409084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2024] [Revised: 09/14/2024] [Indexed: 10/08/2024]
Abstract
Electrochemical extraction has the potential to enhance uranium (U) extraction capacity and rates, but thus far, high selectivity and energy efficiency have not been achieved through the design of electrode materials. Herein, a precise electrocatalysis strategy is developed using a Ferrum (Fe) porphyrin-phenanthroline conjugated network (Fe@PDACN) for energy-efficient uranium extraction. The phenanthroline provides specific binding sites for selective enrichment of U(VI) at active sites (Kd = 2.79 × 105 mL g-1 in multi-ion solution). The Fe(II) sites have strong trap-redox activity for U(VI) and act as dynamic electron donors to rapidly mediate electrocatalytic U(VI) extraction through the redox reaction of Fe(0/II)/Fe(III). Moreover, the Fe-porphyrin blocks support sustained electron donation for U(VI) electrocatalysis by pre-storing electrons. These features enable selective uranium capture and a high electroextraction capacity of 24 646.3 mg g-1 from simulated nuclear wastewater in 280 h at a low voltage of -1.5 V. An ultra-high Faraday efficiency of 90.1% is achieved, and the energy cost is 3.22 × 10-2 $ kg-1 U, significantly lower than the previously reported materials. This work provides a highly efficient strategy for uranium extraction from water.
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Affiliation(s)
- Wenwen Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China
| | - Meiyun Xu
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China
| | - Haotian Wu
- Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC Key Laboratory on Uranium Extraction from Seawater, China National Nuclear Corporation, Beijing, 101149, China
| | - Yan Song
- Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC Key Laboratory on Uranium Extraction from Seawater, China National Nuclear Corporation, Beijing, 101149, China
| | - Peng Liu
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China
| | - Haisheng Yu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Linjuan Zhang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Shusen Chen
- Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC Key Laboratory on Uranium Extraction from Seawater, China National Nuclear Corporation, Beijing, 101149, China
| | - Daoben Hua
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China
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Demoulin CF, Sforna MC, Lara YJ, Cornet Y, Somogyi A, Medjoubi K, Grolimund D, Sanchez DF, Tachoueres RT, Addad A, Fadel A, Compère P, Javaux EJ. Polysphaeroides filiformis, a proterozoic cyanobacterial microfossil and implications for cyanobacteria evolution. iScience 2024; 27:108865. [PMID: 38313056 PMCID: PMC10837632 DOI: 10.1016/j.isci.2024.108865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/29/2023] [Accepted: 01/08/2024] [Indexed: 02/06/2024] Open
Abstract
Deciphering the fossil record of cyanobacteria is crucial to understand their role in the chemical and biological evolution of the early Earth. They profoundly modified the redox conditions of early ecosystems more than 2.4 Ga ago, the age of the Great Oxidation Event (GOE), and provided the ancestor of the chloroplast by endosymbiosis, leading the diversification of photosynthetic eukaryotes. Here, we analyze the morphology, ultrastructure, chemical composition, and metals distribution of Polysphaeroides filiformis from the 1040-1006 Ma Mbuji-Mayi Supergroup (DR Congo). We evidence trilaminar and bilayered ultrastructures for the sheath and the cell wall, respectively, and the preservation of Ni-tetrapyrrole moieties derived from chlorophyll in intracellular inclusions. This approach allows an unambiguous interpretation of P. filiformis as a branched and multiseriate photosynthetic cyanobacterium belonging to the family of Stigonemataceae. It also provides a possible minimum age for the emergence of multiseriate true branching nitrogen-fixing and probably heterocytous cyanobacteria.
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Affiliation(s)
- Catherine F Demoulin
- Early Life Traces & Evolution-Astrobiology, UR Astrobiology, University of Liège, 4000 Liège, Belgium
| | - Marie Catherine Sforna
- Early Life Traces & Evolution-Astrobiology, UR Astrobiology, University of Liège, 4000 Liège, Belgium
- Centre de Biophysique Moléculaire, (UPR CNRS 4301), 45071 Orléans, France
| | - Yannick J Lara
- Early Life Traces & Evolution-Astrobiology, UR Astrobiology, University of Liège, 4000 Liège, Belgium
| | - Yohan Cornet
- Early Life Traces & Evolution-Astrobiology, UR Astrobiology, University of Liège, 4000 Liège, Belgium
| | | | | | - Daniel Grolimund
- Paul Scherrer Institut, Swiss Light Source, 5232 Villigen PSI, Switzerland
| | | | | | - Ahmed Addad
- Unité Matériaux et Transformations (UMR CNRS 8207), Université Lille 1 - Sciences et Technologies, 59650 Villeneuve d'Ascq, France
| | - Alexandre Fadel
- Unité Matériaux et Transformations (UMR CNRS 8207), Université Lille 1 - Sciences et Technologies, 59650 Villeneuve d'Ascq, France
| | - Philippe Compère
- Functional and Evolutive Morphology, UR FOCUS, and Center for Applied Research and Education in Microscopy (CAREM-ULiege), University of Liège, 4000 Liège, Belgium
| | - Emmanuelle J Javaux
- Early Life Traces & Evolution-Astrobiology, UR Astrobiology, University of Liège, 4000 Liège, Belgium
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Cvjetan N, Schuler LD, Ishikawa T, Walde P. Optimization and Enhancement of the Peroxidase-like Activity of Hemin in Aqueous Solutions of Sodium Dodecylsulfate. ACS OMEGA 2023; 8:42878-42899. [PMID: 38024761 PMCID: PMC10652838 DOI: 10.1021/acsomega.3c05915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023]
Abstract
Iron porphyrins play several important roles in present-day living systems and probably already existed in very early life forms. Hemin (= ferric protoporphyrin IX = ferric heme b), for example, is the prosthetic group at the active site of heme peroxidases, catalyzing the oxidation of a number of different types of reducing substrates after hemin is first oxidized by hydrogen peroxide as the oxidizing substrate of the enzyme. The active site of heme peroxidases consists of a hydrophobic pocket in which hemin is embedded noncovalently and kept in place through coordination of the iron atom to a proximal histidine side chain of the protein. It is this partially hydrophobic local environment of the enzyme which determines the efficiency with which the sequential reactions of the oxidizing and reducing substrates proceed at the active site. Free hemin, which has been separated from the protein moiety of heme peroxidases, is known to aggregate in an aqueous solution and exhibits low catalytic activity. Based on previous reports on the use of surfactant micelles to solubilize free hemin in a nonaggregated state, the peroxidase-like activity of hemin in the presence of sodium dodecyl sulfate (SDS) at concentrations below and above the critical concentration for SDS micelle formation (critical micellization concentration (cmc)) was systematically investigated. In most experiments, 3,3',5,5'-tetramethylbenzidine (TMB) was applied as a reducing substrate at pH = 7.2. The presence of SDS clearly had a positive effect on the reaction in terms of initial reaction rate and reaction yield, even at concentrations below the cmc. The highest activity correlated with the cmc value, as demonstrated for reactions at three different HEPES concentrations. The 4-(2-hydroxyethyl)-1-piperazineethanesulfonate salt (HEPES) served as a pH buffer substance and also had an accelerating effect on the reaction. At the cmc, the addition of l-histidine (l-His) resulted in a further concentration-dependent increase in the peroxidase-like activity of hemin until a maximal effect was reached at an optimal l-His concentration, probably corresponding to an ideal mono-l-His ligation to hemin. Some of the results obtained can be understood on the basis of molecular dynamics simulations, which indicated the existence of intermolecular interactions between hemin and HEPES and between hemin and SDS. Preliminary experiments with SDS/dodecanol vesicles at pH = 7.2 showed that in the presence of the vesicles, hemin exhibited similar peroxidase-like activity as in the case of SDS micelles. This supports the hypothesis that micelle- or vesicle-associated ferric or ferrous iron porphyrins may have played a role as primitive catalysts in membranous prebiotic compartment systems before cellular life emerged.
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Affiliation(s)
- Nemanja Cvjetan
- Department
of Materials, ETH-Zürich, Leopold-Ruzicka-Weg 4, 8093 Zürich, Switzerland
| | | | - Takashi Ishikawa
- Department
of Biology and Chemistry, Paul Scherrer Institute and Department of
Biology, ETH-Zürich, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Peter Walde
- Department
of Materials, ETH-Zürich, Leopold-Ruzicka-Weg 4, 8093 Zürich, Switzerland
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