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Updated: Jul 17, 2025
06:00
Determination of the Settling Rate of Clay/Cyanobacterial Floccules
Published on: June 11, 2018
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Colloidal Interactions of Microplastic Particles with Anionic Clays in Electrolyte Solutions
Dóra Takács1,2, Tamás Szabó2, Andrej Jamnik3
1MTA-SZTE Lendület Biocolloids Research Group, Interdisciplinary Excellence Centre, University of Szeged, Rerrich Bela ter 1, H-6720 Szeged, Hungary.
Langmuir : the ACS Journal of Surfaces and Colloids
|August 30, 2023
Summary
Polystyrene microplastics and layered double hydroxide minerals aggregate in salt solutions. Layered double hydroxide addition neutralizes microplastic charges, aiding their removal for water remediation.
Area of Science:
- Environmental Science
- Colloid and Surface Chemistry
- Materials Science
Background:
- Microplastic (MP) pollution is a growing environmental concern.
- Understanding MP aggregation behavior in aquatic environments is crucial.
- Layered double hydroxides (LDHs) show potential for water remediation.
Purpose of the Study:
- To investigate the homoaggregation of polystyrene MPs and heteroaggregation with anionic LDHs.
- To elucidate the effects of salt type and ionic strength on particle stability.
- To explore LDH-based strategies for MP removal from water.
Main Methods:
- Light scattering techniques to study particle aggregation.
- Transmission electron microscopy (TEM) and X-ray scattering for confirmation.
- Analysis of interparticle forces including DLVO theory and Schulze-Hardy rule.
Main Results:
- Salt type and ionic strength significantly influenced MP and LDH stability.
- Heteroaggregation occurred between oppositely charged MPs and LDHs.
- LDH adsorption neutralized MP surface charge, leading to aggregation at optimal doses.
Conclusions:
- Colloidal behavior of MPs is complex and influenced by environmental factors.
- LDH particle adsorption is key to MP aggregation and removal.
- LDH-based approaches offer a promising method for MP water remediation.
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