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Characteristics and removal of microplastics in rural domestic wastewater treatment facilities of China
Wei, S.; Luo, H.; Zou, J.; Chen, J.; Pan, X.; Rousseau, D.P.L.; Li, J. (2020). Characteristics and removal of microplastics in rural domestic wastewater treatment facilities of China. Sci. Total Environ. 739: 139935. https://dx.doi.org/10.1016/j.scitotenv.2020.139935
In: Science of the Total Environment. Elsevier: Amsterdam. ISSN 0048-9697; e-ISSN 1879-1026, meer
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| Author keywords |
Microplastics, Rural areas, Wastewater treatment, Constructed wetlands |
| Auteurs | | Top |
- Wei, S.
- Luo, H.
- Zou, J.
- Chen, J.
|
- Pan, X.
- Rousseau, D.P.L.
- Li, J.
|
|
| Abstract |
The environment of the countryside is different from that of the city. Studying the abundance, characteristics, and removal of microplastics (MPs) in rural domestic wastewater treatment facilities (RD-WWTFs) is of great significance for understanding the impacts of human activities on the environment of the countryside. Therefore, we studied five such facilities in the Hangzhou region of China. The abundance of MPs in the influent was 430–2154 items/m3. Micro-Raman spectroscopic analysis indicates that the main type of polymer in the influent is polypropylene (PP, 54.6%), followed by polystyrene (PS, 29.7%) and polyethylene terephthalate (PET, 9.7%). The color of MPs is mainly white and clear (62.9%), red (13.3%) and gray (12.0%). Our results show that fragments (71.3%) are the dominant shape of MPs, followed by fibers (21.5%). The characteristics of MPs, such as sizes, shapes, and types, along with the treatment process, affect the removal of MPs in RD-WWTFs. Large MPs are easily removed by anaerobic processes, while small MPs are better removed by anaerobic/anoxic/oxic processes. Fibrous MPs are more difficult to be removed than the fragmented ones. Constructed wetlands play an important role in the removal of MPs. |
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