Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2025 Mar 18;197(4):420.
doi: 10.1007/s10661-025-13882-1.

Microplastics in wastewater and the role of local wastewater treatment stations in controlling microplastic pollution: a case study from Vietnam

Affiliations

Microplastics in wastewater and the role of local wastewater treatment stations in controlling microplastic pollution: a case study from Vietnam

Thi Oanh Doan et al. Environ Monit Assess. .

Abstract

Wastewater has been identified as one of the main contributors to microplastic (MP) pollution in aquatic environments. Hence, this study investigates the presence, characteristics of MPs in wastewater sample types (industrial, domestic, and medical wastewater), and also the removal efficacy of MPs by local wastewater treatment stations. Overall, industrial wastewater showed a higher MP abundance level at 60,881 ± 48,154 items/m3, compared to domestic and medical wastewater with values of 31,494 ± 10,142 items/m3 and 35,453 ± 13,186 items/m3, respectively. Fiber and fragment were the main shapes observed among the MPs found in all wastewater samples, and the dominant form was microfiber, ranging from 63 to 97.5% of total MPs. The performance of local wastewater treatment stations showed varied efficiencies in MP removal, ranging between 15.8 ± 5 and 90.2 ± 1.3%. Domestic wastewater treatment stations showed lower MP removal effectiveness, at 43.9 ± 13.1%, while treatment stations receiving industrial and medical wastewater achieved 59.5 ± 20.7 and 69.6 ± 22.1% of removal efficiencies, respectively. As estimated, 2.9 × 1010 microplastic items could be emitted to the water bodies around Hanoi every day, which MPs originated from domestic wastewater accounted for 80.3% due to its high discharge volume and inadequate treatment capacity. Optimization of the septic tank system operation and the sewage sludge treatment processes could prevent secondary contamination of MPs, while an additional primary sedimentation step could improve the overall MP elimination efficacy of the studied treatment stations. The results from this study suggested that more in-depth investigations were required for a proper understanding of the migration routes of MPs from different anthropogenic activities to wastewater.

Keywords: Domestic; Industrial and medical wastewater; Microplastic; Removal; Wastewater treatment plant.

PubMed Disclaimer

Conflict of interest statement

Declarations: All authors have read, understood, and have complied as applicable with the statement on “Ethical responsibilities of Authors” as found in the Instructions for Authors. Ethics approval: Not applicable. Competing interests: The authors declare no competing interests.

Similar articles

References

    1. Adhikari, J. R., & Lohani, S. P. (2019). Design, installation, operation and experimentation of septic tank – UASB wastewater treatment system. Renewable Energy, 143, 1406–1415. https://doi.org/10.1016/j.renene.2019.04.059 - DOI
    1. Alavian Petroody, S. S., Hashemi, S. H., & van Gestel, C. A. M. (2021). Transport and accumulation of microplastics through wastewater treatment sludge processes. Chemosphere, 278, 130471. https://doi.org/10.1016/j.chemosphere.2021.130471 - DOI
    1. Arfanuzzaman, Md., & Dahiya, B. (2019). Sustainable urbanization in Southeast Asia and beyond: Challenges of population growth, land use change, and environmental health. Growth and Change, 50, 725–744. https://doi.org/10.1111/grow.12297 - DOI
    1. Bakaraki Turan, N., Sari Erkan, H., & Onkal Engin, G. (2021). Microplastics in wastewater treatment plants: Occurrence, fate and identification. Process Safety and Environmental Protection, 146, 77–84. https://doi.org/10.1016/j.psep.2020.08.039 - DOI
    1. Bao, R., Wang, Z., Qi, H., Mehmood, T., Cai, M., Zhang, Y., Yang, R., Peng, L., & Liu, F. (2022). Occurrence and distribution of microplastics in wastewater treatment plant in a tropical region of China. Journal of Cleaner Production, 349, 131454. https://doi.org/10.1016/j.jclepro.2022.131454 - DOI

MeSH terms

LinkOut - more resources