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Segovia-Campos I, Kanellakopoulos A, Barrozo IJ, Fock-Chin-Ming E, Filella M, Fontaine AB, Pallada S, Triscone G, Perron K, Ariztegui D. Strontium-90 pollution can be bioremediated with the green microalga Tetraselmis chui. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024; 26:622-631. [PMID: 38334136 DOI: 10.1039/d3em00336a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Strontium-90 (90Sr) is an artificial radioisotope produced by nuclear fission, with a relatively long half-life of 29 years. This radionuclide is released into the environment in the event of a nuclear incident, posing a serious risk to human and ecosystem health. There is a need to develop new efficient methods for the remediation of 90Sr, as current techniques for its removal have significant technical limitations and involve high energy and economic costs. Recently, several species of green microalgae within the class Chlorodendrophyceae have been found to form intracellular mineral inclusions of amorphous calcium carbonate (ACC), which can be highly enriched in natural (non-radiogenic) Sr. As bioremediation techniques are an attractive option to address radioactive pollution, we investigated the capacity of the unicellular alga Tetraselmis chui (class Chlorodendrophyceae) to sequester 90Sr. The 90Sr uptake capacity of T. chui cells was assessed in laboratory cultures by monitoring the time course of radioactivity in the culture medium using liquid scintillation counting (LSC). T. chui was shown to effectively sequester 90Sr, reducing the initial radioactivity of the culture medium by up to 50%. Thus, this study demonstrates the potential of the microalga T. chui to be used as a bioremediation agent against 90Sr pollution.
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Affiliation(s)
- Inés Segovia-Campos
- Department of Earth Sciences, University of Geneva, 1205 Geneva, Switzerland.
| | - Anastasios Kanellakopoulos
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Ivan John Barrozo
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Edouard Fock-Chin-Ming
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Montserrat Filella
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland.
| | - Axel Baxarias Fontaine
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Stavroula Pallada
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Gilles Triscone
- Department of Engineering, University of Applied Sciences of Western Switzerland (HES-SO), 1202 Geneva, Switzerland
| | - Karl Perron
- Department of Plant Sciences, Microbiology Unit, University of Geneva, 1205 Geneva, Switzerland
| | - Daniel Ariztegui
- Department of Earth Sciences, University of Geneva, 1205 Geneva, Switzerland.
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Basile M, Triunfo C, Gärtner S, Fermani S, Laurenzi D, Maoloni G, Mazzon M, Marzadori C, Adamiano A, Iafisco M, Montroni D, Gómez Morales J, Cölfen H, Falini G. Stearate-Coated Biogenic Calcium Carbonate from Waste Seashells: A Sustainable Plastic Filler. ACS OMEGA 2024; 9:11232-11242. [PMID: 38496946 PMCID: PMC10938433 DOI: 10.1021/acsomega.3c06186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/03/2023] [Accepted: 11/08/2023] [Indexed: 03/19/2024]
Abstract
Waste seashells from aquaculture are a massive source of biogenic calcium carbonate (bCC) that can be a potential substitute for ground calcium carbonate and precipitated calcium carbonate. These last materials find several applications in industry after a surface coating with hydrophobic molecules, with stearate as the most used. Here, we investigate for the first time the capability of aqueous stearate dispersions to coat bCC powders from seashells of market-relevant mollusc aquaculture species, namely the oyster Crassostrea gigas, the scallop Pecten jacobaeus, and the clam Chamelea gallina. The chemical-physical features of bCC were extensively characterized by different analytical techniques. The results of stearate adsorption experiments showed that the oyster shell powder, which is the bCC with a higher content of the organic matrix, showed the highest adsorption capability (about 23 wt % compared to 10 wt % of geogenic calcite). These results agree with the mechanism proposed in the literature in which stearate adsorption mainly involves the formation of calcium stearate micelles in the dispersion before the physical adsorption. The coated bCC from oyster shells was also tested as fillers in an ethylene vinyl acetate compound used for the preparation of shoe soles. The obtained compound showed better mechanical performance than the one prepared using ground calcium. In conclusion, we can state that bCC can replace ground and precipitated calcium carbonate and has a higher stearate adsorbing capability. Moreover, they represent an environmentally friendly and sustainable source of calcium carbonate that organisms produce by high biological control over composition, polymorphism, and crystal texture. These features can be exploited for applications in fields where calcium carbonate with selected features is required.
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Affiliation(s)
- Maria
Luisa Basile
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy
| | - Carla Triunfo
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy
- Fano
Marine Center, viale
Adriatico 1/N, 61032 Fano, Italy
| | - Stefanie Gärtner
- Department
of Chemistry, Physical Chemistry, University
of Konstanz, Universitätsstrasse 10, Box 714, D-78457 Konstanz, Germany
| | - Simona Fermani
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy
- Interdepartmental
Centre for Industrial Research Health Sciences & Technologies, University of Bologna, 40064 Bologna, Italy
| | - Davide Laurenzi
- Plant
Ascoli Piceno, Finproject S.p.A., Via Enrico Mattei, 1—Zona
Ind.le Campolungo, 3100 Ascoli Piceno, Italy
| | - Gabriele Maoloni
- Plant
Ascoli Piceno, Finproject S.p.A., Via Enrico Mattei, 1—Zona
Ind.le Campolungo, 3100 Ascoli Piceno, Italy
| | - Martina Mazzon
- DiSTA,
Department
of Science and Technology of Agriculture and Environment, University of Bologna, via Fanin 40, 40127 Bologna, Italy
| | - Claudio Marzadori
- DiSTA,
Department
of Science and Technology of Agriculture and Environment, University of Bologna, via Fanin 40, 40127 Bologna, Italy
| | - Alessio Adamiano
- Institute
of Science, Technology and Sustainability for Ceramics, Consiglio Nazionale delle Ricerche, Via Granarolo 64, 48018 Faenza, Italy
| | - Michele Iafisco
- Institute
of Science, Technology and Sustainability for Ceramics, Consiglio Nazionale delle Ricerche, Via Granarolo 64, 48018 Faenza, Italy
| | - Devis Montroni
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy
| | - Jaime Gómez Morales
- Laboratorio
de Estudios Cristalográficos, Instituto
Andaluz de Ciencias de la Tierra (CSIC-UGR), Avda Las Palmeras 4, 18100 Armilla, Granada, Spain
| | - Helmut Cölfen
- Department
of Chemistry, Physical Chemistry, University
of Konstanz, Universitätsstrasse 10, Box 714, D-78457 Konstanz, Germany
| | - Giuseppe Falini
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy
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Segovia‐Campos I, Filella M, Perron K, Ariztegui D. High calcium and strontium uptake by the green microalga Tetraselmis chui is related to micropearl formation and cell growth. ENVIRONMENTAL MICROBIOLOGY REPORTS 2023; 15:38-50. [PMID: 36151741 PMCID: PMC10103758 DOI: 10.1111/1758-2229.13124] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 09/01/2022] [Indexed: 05/20/2023]
Abstract
Strontium-rich micropearls (intracellular inclusions of amorphous calcium carbonate) have been observed in several species of green microalgae within the class Chlorodendrophyceae, suggesting the potential use of these organisms for 90 Sr bioremediation purposes. However, very little is known about the micropearl formation process and the Ca and Sr uptake dynamics of these microalgae. To better understand this phenomenon, we investigated, through laboratory cultures, the behaviour of two species within the class Chorodendrophyceae: Tetraselmis chui, forming micropearls, and T. marina, not forming micropearls. We show that T. chui growth and micropearl formation requires available Ca in the culture medium, and that the addition of dissolved Sr can partially replace the function of Ca in cells. On the other hand, T. marina can grow without added Ca and Sr, probably due to its inability to form micropearls. T. chui cells show a high Ca and Sr uptake, significantly decreasing the concentration of both elements in the culture medium. Strontium is incorporated in micropearls in a short period of time, suggesting that micropearl formation is, most likely, a fast process that only takes a few hours. In addition, we show that micropearls equally distribute between daughter cells during cell division.
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Affiliation(s)
| | | | - Karl Perron
- Microbiology UnitUniversity of GenevaGenevaSwitzerland
| | - Daniel Ariztegui
- Department of Earth SciencesUniversity of GenevaGenevaSwitzerland
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Barbosa N, Jaquet JM, Urquidi O, Adachi TBM, Filella M. Combined in vitro and in vivo investigation of barite microcrystals in Spirogyra (Zygnematophyceae, Charophyta). JOURNAL OF PLANT PHYSIOLOGY 2022; 276:153769. [PMID: 35939894 DOI: 10.1016/j.jplph.2022.153769] [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: 01/10/2022] [Revised: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
We have investigated the biomineralisation of barite ‒a useful proxy for reconstructing paleoproductivity‒ in a freshwater alga, Spirogyra, by combining in vitro and in vivo approaches to unveil the nature of its barite microcrystals. Scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDXS) observations on simply dried samples revealed that the number and size of barite crystals were related to the barium concentration in the media. Additionally, their morphology showed a crystallographic face (011), which is not normally observed, suggesting the influence of organic molecules on the growth kinetics. The critical point drying method was used to preserve the internal and external structures of Spirogyra cells for SEM imaging. Crystals were found adjacent to the cytoplasmic membrane, near chloroplasts and fibrillary network. In vivo optical microscopy and Raman tweezer microspectroscopy in living cells showed that barite microcrystals are optically visible and follow cytoplasmic streaming. These results led us to propose that barite formation in Spirogyra occurs in the cytoplasm where barium and sulphate are both available: barium supplied non-selectively through the active transport of the divalent cations needed for actin polymerisation, and sulphate because necessary for amino acid biosynthesis in chloroplasts.
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Affiliation(s)
- Natercia Barbosa
- Department F.-A. Forel, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland; Department of Physical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1205 Geneva, Switzerland
| | - Jean-Michel Jaquet
- Department Earth Sciences, University of Geneva, Rue des Maraîchers 13, CH-1205 Geneva, Switzerland
| | - Oscar Urquidi
- Department of Physical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1205 Geneva, Switzerland
| | - Takuji B M Adachi
- Department of Physical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1205 Geneva, Switzerland.
| | - Montserrat Filella
- Department F.-A. Forel, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland.
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