A - Papers appearing in refereed journals
Vazquez Juiz, M.L., Soto Gomez, D., Perez Rodriguez, P., Paradelo, M. and Lopez Periago, J. E. 2018. Humic acids modify the pulse size distributions in the characterization of plastic microparticles by Tunable Resistive Pulse Sensing. Journal of Contaminant Hydrology. 218, pp. 59-65. https://doi.org/10.1016/j.jconhyd.2018.10.008
Authors | Vazquez Juiz, M.L., Soto Gomez, D., Perez Rodriguez, P., Paradelo, M. and Lopez Periago, J. E. |
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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 |
Keywords | Colloid; Flocculation; Finite Gaussian Clustering; Humic Acids; Particle size; Microplastics; Tunable resistive pulse sensing; TRPS |
Year of Publication | 2018 |
Journal | Journal of Contaminant Hydrology |
Journal citation | 218, pp. 59-65 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jconhyd.2018.10.008 |
Web address (URL) | https://doi.org/10.1016/j.jconhyd.2018.10.008 |
Open access | Published as non-open access |
Funder | Biotechnology and Biological Sciences Research Council |
Funder project or code | S2N - Soil to Nutrition - Work package 1 (WP1) - Optimising nutrient flows and pools in the soil-plant-biota system |
Output status | Published |
Publication dates | |
Online | 16 Oct 2018 |
Publication process dates | |
Accepted | 12 Oct 2018 |
Publisher | Elsevier Science Bv |
Copyright license | CC BY |
ISSN | 0169-7722 |
Permalink - https://repository.rothamsted.ac.uk/item/84v8w/humic-acids-modify-the-pulse-size-distributions-in-the-characterization-of-plastic-microparticles-by-tunable-resistive-pulse-sensing