Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants

In this study, the effect of surfactants and electrolytes on stability of kaolinite dispersions was analyzed by measuring suspension transmittance, zeta potential, and adsorption. It was experimentally found that the compression of kaolinite electric double layer caused by NaCl addition may reduce t...

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Autores principales: Hu, Yang, Yang, Qingyang, Kou, Jue, Sun, Chunbao, Li, Hongliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7505426/
https://www.ncbi.nlm.nih.gov/pubmed/32956346
http://dx.doi.org/10.1371/journal.pone.0238350
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author Hu, Yang
Yang, Qingyang
Kou, Jue
Sun, Chunbao
Li, Hongliang
author_facet Hu, Yang
Yang, Qingyang
Kou, Jue
Sun, Chunbao
Li, Hongliang
author_sort Hu, Yang
collection PubMed
description In this study, the effect of surfactants and electrolytes on stability of kaolinite dispersions was analyzed by measuring suspension transmittance, zeta potential, and adsorption. It was experimentally found that the compression of kaolinite electric double layer caused by NaCl addition may reduce the electrostatic repulse force to facilitate the aggregation of kaolinite particles. Surfactant facilitate the aggregation of kaolinite particles mainly through the adsorption of it on the surface of kaolinite to generate hydrophobic force. Compared to anionic surfactant, the cationic surfactant has a better flocculation effect because it can be used in a wide pH range and its adsorption can reduce the electrostatic repulse force between kaolinite particles.
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spelling pubmed-75054262020-09-30 Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants Hu, Yang Yang, Qingyang Kou, Jue Sun, Chunbao Li, Hongliang PLoS One Research Article In this study, the effect of surfactants and electrolytes on stability of kaolinite dispersions was analyzed by measuring suspension transmittance, zeta potential, and adsorption. It was experimentally found that the compression of kaolinite electric double layer caused by NaCl addition may reduce the electrostatic repulse force to facilitate the aggregation of kaolinite particles. Surfactant facilitate the aggregation of kaolinite particles mainly through the adsorption of it on the surface of kaolinite to generate hydrophobic force. Compared to anionic surfactant, the cationic surfactant has a better flocculation effect because it can be used in a wide pH range and its adsorption can reduce the electrostatic repulse force between kaolinite particles. Public Library of Science 2020-09-21 /pmc/articles/PMC7505426/ /pubmed/32956346 http://dx.doi.org/10.1371/journal.pone.0238350 Text en © 2020 Hu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Hu, Yang
Yang, Qingyang
Kou, Jue
Sun, Chunbao
Li, Hongliang
Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title_full Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title_fullStr Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title_full_unstemmed Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title_short Aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
title_sort aggregation mechanism of colloidal kaolinite in aqueous solutions with electrolyte and surfactants
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7505426/
https://www.ncbi.nlm.nih.gov/pubmed/32956346
http://dx.doi.org/10.1371/journal.pone.0238350
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