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Microplastic generation and emission from ship's greywater

Zenodo (CERN European Organization for Nuclear Research) 2024
Yu Lee Jang, Jongwook Jeong, Jongwook Jeong, Soeun Eo, Sang Hee Hong, Sang Hee Hong, Won Joon Shim, Won Joon Shim

Summary

Researchers measured microplastic abundances and characteristics in greywater from different vessel types — a research vessel, a container ship, and passenger ships — and estimated global microplastic emissions from the discharge of untreated ship greywater. They found a mean abundance of 135,563 particles/m3 in research vessel greywater with fibers comprising about 66% of particles, identifying greywater discharge as a significant and largely unregulated sea-based microplastic source.

The discharge of untreated greywater from ships, an uncounted sea-based source of microplastics (MPs), is a growing concern due to the lack of regulations on discharge except in some designated areas. However, empirical data on MPs from this source are currently limited. Here, the abundances and characteristics of MPs in greywater from different types of vessels (research vessel (R/V), container ship, and passenger ships) were investigated. Additionally, emissions of MPs were estimated from the greywater discharge of global transport ships. The mean abundance of MPs in greywater generated from R/V was 135,563 ± 87,141 n/m3. Fiber-type MPs accounted for 66 Also see: https://micro2024.sciencesconf.org/559312/document

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