Skip to Main content Skip to Navigation
Journal articles

Humic acids modify the pulse size distributions in the characterization of plastic microparticles by Tunable Resistive Pulse Sensing

Abstract : Tunable Resistive Pulse Sensing, TRPS, is an emerging technique used in quantification and measuring the size (particle-by-particle) of viruses, exosomes and engineered colloidal spheres in biological fluids. We study the features of TRPS to enhance size characterization and quantification of submicron-sized microplastics, also called plastic microparticles, MP, in freshwater environments. We report alterations on the detection of the resistive pulses in the TRPS caused by humic acids, HA, during the size measurement of polystyrene microspheres used as MP surrogate. We discuss the alteration of the electric field in the measuring channel of the TRPS apparatus induced by the passage of HA. TRPS is a fast and precise technique for counting and size determination of MP but needs the evaluation of the influence of the organic matter on the current blockades. We show that statistical clustering models of the magnitude distribution of the resistive pulses can help to detect and quantify changes in the pulse size distributions induced by flocculation of humic acids. Conclusions of this study indicate that TRPS can be a valuable tool to improve the knowledge of the MP fate in surface waters, in the vadose zone and groundwater.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03707917
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, June 28, 2022 - 5:38:15 PM
Last modification on : Wednesday, June 29, 2022 - 3:33:51 AM

Identifiers

Collections

Citation

María Laura Vázquez Juiz, Diego Soto Gómez, Paula Pérez Rodríguez, Marcos Paradelo, José Eugenio López Periago. Humic acids modify the pulse size distributions in the characterization of plastic microparticles by Tunable Resistive Pulse Sensing. Journal of Contaminant Hydrology, 2018, 218, pp.59-69. ⟨10.1016/j.jconhyd.2018.10.008⟩. ⟨insu-03707917⟩

Share

Metrics

Record views

0