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<p>Reclaimed water is an important contributor to natural water resources, particularly for irrigation, yet microplastics from reclaimed water may contaminate natural waters. Here we studied microplastic removal in a reclaimed water plant. Results show that the removal efficiency of the reclaimed water plant reached 94.1%. However, the effluents still contained 9.0 ± 1.0 microplastic/L, corresponding to a contamination of approximately 3.6 × 10<sup>4</sup> microplastic/day to the receiving wetland. Ecological risk assessment indicated low risk levels of 0.012 for rexclaimed water and 0.074 for the receiving wetland. However, localized points showed moderate risk levels, suggesting that microplastics in the wetland primarily originate from internal processes, such as surface runoff, rather than rexclaimed water input. </p>

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Microplastic pollution of natural wetlands by reclaimed water

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Diwen Sun,
  • Yiwen Wang,
  • Xiaofeng Wen,
  • Haoran Zhang,
  • Xiuzhen Nie,
  • Jiayi Tian,
  • Xiang Long,
  • Ziyi Qiu,
  • Haojie Chen,
  • Wenming Wang,
  • Hui Wang,
  • Lingshi Yin

摘要

Reclaimed water is an important contributor to natural water resources, particularly for irrigation, yet microplastics from reclaimed water may contaminate natural waters. Here we studied microplastic removal in a reclaimed water plant. Results show that the removal efficiency of the reclaimed water plant reached 94.1%. However, the effluents still contained 9.0 ± 1.0 microplastic/L, corresponding to a contamination of approximately 3.6 × 104 microplastic/day to the receiving wetland. Ecological risk assessment indicated low risk levels of 0.012 for rexclaimed water and 0.074 for the receiving wetland. However, localized points showed moderate risk levels, suggesting that microplastics in the wetland primarily originate from internal processes, such as surface runoff, rather than rexclaimed water input.