Microalgae as Soft Permeable Particles
| العنوان: | Microalgae as Soft Permeable Particles |
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| المؤلفون: | Paula Araujo Gomes, Jean-Baptiste d’Espinose de Lacaillerie, Bruno Lartiges, Martin Maliet, Valérie Molinier, Nicolas Passade-Boupat, Nicolas Sanson |
| المساهمون: | Laboratoire Physico-Chimie des Interfaces Complexes (PIC), Sciences et Ingénierie de la Matière Molle (UMR 7615) (SIMM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Total Energies, Géosciences Environnement Toulouse (GET), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Langmuir Langmuir, 2022, 38 (46), pp.14044-14052. ⟨10.1021/acs.langmuir.2c01735⟩ |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Electrophoresis, Ionic strength, Cells, Cell Membrane, Electrochemistry, Microalgae, General Materials Science, Surfaces and Interfaces, Layers, Condensed Matter Physics, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Polyelectrolytes, Spectroscopy |
| الوصف: | International audience; The colloidal stability of non-motile algal cells in water drives their distribution in space. An accurate description of the interfacial properties of microalgae is therefore critical to understand how microalgae concentrations can change in their biotope or during harvesting processes. Here, we probe the surface charges of three unicellular algae─Chlorella vulgaris, Nannochloropsis oculata, and Tetraselmis suecica─through their electrophoretic mobility. Ohshima’s soft particle theory describes the electrokinetic properties of particles covered by a permeable polyelectrolyte layer, a usual case for biological particles. The results appear to fit the predictions of Ohshima’s theory, proving that all three microalgae behave electrokinetically as soft particles. This allowed us to estimate two characteristic parameters of the polyelectrolyte external layer of microalgae: the volume charge density and the hydrodynamic penetration length. Results were compared with transmission electron microscopy observations of the algal cells’ surfaces, and in particular of their extracellular polymeric layer, which was identified with the permeable shell evidenced by electrophoretic measurements. Noticeably, the algal surface potentials estimated from electrophoretic mobility using the soft particle theory are less negative than the apparent zeta potentials. This finding indicates that electrostatics are expected to play a minor role in phenomena of environmental and industrial importance, such as microalgae aggregation or adhesion. |
| تدمد: | 1520-5827 0743-7463 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f9e8ed483cab14d871443ffc367e338 https://pubmed.ncbi.nlm.nih.gov/36343201 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....2f9e8ed483cab14d871443ffc367e338 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205827 07437463 |
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