Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river

Yuntao ZHANG; Huijun LIU; Luyi ZHANG; Yuan GAO; Yong LIU; Wenzhou FAN; Xiaoying ZHOU; Wei HUANG; Zhiheng LI; Wenlu ZHAO

doi:10.1007/s00343-024-3214-x

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Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river

Micro- and nano-plastics in freshwater environments | Updated：2025-03-21

- Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river
- Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river
- 海洋湖沼学报(英文) 2025年43卷第2期页码：346-359
- Affiliations：
  
  1.School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
  2.Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, China
  3.Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
- Author bio：
  
  wlzhao@zjgsu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(42107268);the “Digital+” Discipline Construction Management Project of Zhejiang Gongshang University(SZJ2022A008)
- DOI：10.1007/s00343-024-3214-x
  中图分类号：
- 收稿：2023-10-17，
  
  网络首发：2024-01-04，
  
  纸质出版：2025-03-01
- Accepted：
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Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river[J]. 海洋湖沼学报(英文), 2025,43(2):346-359.

ZHANG Yuntao,LIU Huijun,ZHANG Luyi,et al.Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river[J].Journal of Oceanology and Limnology,2025,43(02):346-359.
Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river[J]. 海洋湖沼学报(英文), 2025,43(2):346-359. DOI： 10.1007/s00343-024-3214-x.

ZHANG Yuntao,LIU Huijun,ZHANG Luyi,et al.Microplastic transport from a wastewater treatment plant into Qiantang River, an estuarine river[J].Journal of Oceanology and Limnology,2025,43(02):346-359. DOI： 10.1007/s00343-024-3214-x.

摘要

Abstract

Microplastics (MPs) have garnered increasing research attentions due to their ubiquitous presence in the environment and consequential impacts on both ecosystems and human health. Wastewater treatment plants (WWTPs) are identified as major sources of MPs in aquatic environments

as they receive anthropogenic MPs from household and industrial sewer networks. Based on treated wastewater samples collected in October 2018 from a WWTP in Hangzhou City

China

the MP transport into the Qiantang River before heading into Hangzhou Bay

East China Sea

was investigated. To determine the

abundance and characteristics of MPs

the quantities of MPs released into the environment from the WWTP in different treatment stages were estimated

and their migration was simulated using numerical modeling techniques. Results show that the abundance of MPs in the effluent of the WWTP was 1.3 pieces/L

with a daily discharge of 7.6×10

pieces of MPs into the Qiantang River. Polyether sulfone (PES)

rayon

and polyethylene terephthalate (PET) were identified from MPs

being dominated by polypropylene (PP). MPs predominantly displayed fibrous and fragmented shapes. Household laundering and plastic product usage were major sources of MPs

with mechanical wear during treatment potentially contributing to the transformation from primary to secondary MPs. After 45 days of transport simulation

a high abundance zone of MPs was observed in the southern region of Hangzhou Bay

with its diffusion range being influenced by the combined effects of river runoff and tides. The spatial distribution range was significantly greater during the spring tide compared to that in the neap tide

and there were varying degrees of MP accumulation in the upper reaches of the wastewater outlet as runoff decreased. This study integrated the emissions and transport of MPs from WWTPs to estuarine rivers

thereby providing valuable scientific guidance for future regional control measures and ecological risk assessments of MPs.

关键词

Keywords

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