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Microplastic transport dynamics in surcharging and overflowing manholes
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Stride, Ben, Dykes, Charlotte, Abolfathi, Soroush, Jimoh, Modupe, Bending, Gary D. and Pearson, Jonathan M. (2023) Microplastic transport dynamics in surcharging and overflowing manholes. Science of The Total Environment, 899 . 165683. doi:10.1016/j.scitotenv.2023.165683 ISSN 0048-9697.
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Official URL: https://doi.org/10.1016/j.scitotenv.2023.165683
Abstract
The transport of microplastics within urban water systems remains poorly understood, with little prior research on their behaviour within manhole configurations. This study represents the first to measure and model the transport dynamics of microplastics within circular and square manholes under different hydraulic scenarios. The transport and fate of polyethylene (PE) was quantified and compared to solutes (Rhodamine WT dye) using energy losses, residence time distributions (RTDs), and mixing models within surcharging and overflowing manholes. The bulk mass of solute and PE concentrations followed similar flow paths across all conditions except for 17.3 ± 7.9 % of PE mass that was immobilized in a dead zone above the inlet pipe for manholes with a surcharge to pipe diameter ratio ≥2. Consequently, these microplastics only exit after a significant change in hydraulic regime occurs, causing microplastics to be at risk of being contaminated over a prolonged duration. No significant mixing differences for PE and solutes were found between manhole geometries. The deconvolution method outperformed the ADZ model with goodness of fit (
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TD Environmental technology. Sanitary engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) |
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| Library of Congress Subject Headings (LCSH): | Microplastics, Polyethylene, Water -- Pollution, Manholes, Sewerage | ||||||||
| Journal or Publication Title: | Science of The Total Environment | ||||||||
| Publisher: | Elsevier Science BV | ||||||||
| ISSN: | 0048-9697 | ||||||||
| Official Date: | 15 November 2023 | ||||||||
| Dates: |
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| Volume: | 899 | ||||||||
| Article Number: | 165683 | ||||||||
| DOI: | 10.1016/j.scitotenv.2023.165683 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 24 July 2023 | ||||||||
| Date of first compliant Open Access: | 24 July 2023 | ||||||||
| RIOXX Funder/Project Grant: |
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