Whole Process Analysis and Fate Behavior of Microplastics in Urban Wastewater Treatment Plants, Including their Occurrence Forms, Components, and Removal Efficiency

被引：1
|
作者：
Mi J.-H. [1 ]
Lu J.-P. [1 ,2 ]
Liu T.-X. [1 ,2 ]
Liu Y. [1 ,2 ]
Shi X.-H. [1 ,2 ]
Zhang X.-J. [1 ,2 ]
Shi Z.-Y. [1 ]
Liu Y.-H. [1 ]
机构：
[1] College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot
[2] Water Resources Protection and Utilization Key Laboratory, Inner Mongolia Agricultural University, Hohhot
来源：
Huanjing Kexue/Environmental Science | / 45卷 / 07期
关键词：
environmental risk; microplastics; occurrence characteristics; removal effect; urban sewage treatment plant;
D O I：
10.13227/j.hjkx.202305177
中图分类号：
学科分类号：
摘要：
Microplastics are among the most difficult new pollutants to remove in wastewater treatment plants. In order to explore the occurrence form，size distribution，composition，removal efficiency，migration law，and fate behavior characteristics of microplastic particles in sewage plants，taking a sewage treatment plant in Hohhot as an example，a total of 17 sampling sites were set up. The LAS X software counted the shape，abundance，and size of microplastics and conducted a full-process analysis. The results showed that：fibrous microplastics had the highest abundance and widest distribution and were the main form of existence，accounting for 61.8% of the total abundance；the size of microplastics ranged mainly between 0 and 1.00 mm，and among the four sizes，the abundance of microplastics 0.25 to 0.50 mm in China was the highest，accounting for 32.9%. Among the eight types of plastic components detected，polyester substances（PET，PBT），cellulose，and polypropylene（PP）were the main components，accounting for 25%，21%，and 17%，respectively. The influent abundance of the sewage plant was（73 ± 5）n·L−1，the effluent abundance was（14 ± 2）n·L−1，and the overall removal rate was（80.8 ± 12.1）%. Among the three treatment stages of the sewage plant，only the primary treatment played a role in removal，and the abundance of microplastics surged in the secondary treatment. Different structures playing a major role in the removal of microplastics were fine grids（49.2 ± 7.4）% and secondary sedimentation tanks（92.4 ± 13.9）%. Microplastics mainly existed in the form of fibers，fragments，and films. The proportion of fibers was approximately 70%，and the size of fragments was mainly concentrated between 0.50 and 5.00 mm. Most fragments were in the range of 5.00 mm，accounting for 50%，making them the main form apart from fibrous. The film-like size was mostly concentrated in the range of less than 0.50 mm，accounting for more than 10%. Therefore，improving the removal of small-sized fibrous and film-like microplastics and large-sized fragmented microplastic particles can effectively reduce the pollution risk of microplastics in the environment caused by sewage plant drainage. © 2024 Science Press. All rights reserved.
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页码：4052 / 4062
页数：10
相关论文
共 48 条
  • [1] Wang J, Et al., Microplastics as contaminants in the soil environment： a mini-review ［J］, Science of the total environment, (2019)
  • [2] Liu Y，, Shi X H, Zhang S，, Et al., Deposition law of low-density microplastics aggregation in Wuliangsu Lake［J］, Environmental Science, 43, 3, pp. 1463-1471, (2022)
  • [3] Liu W Y，, Pan T，, Liu H，, Et al., Adsorption behavior of imidacloprid pesticide on polar microplastics under environmental conditions：critical role of photo-aging［J］, Frontiers of Environmental Science & Engineering, 17, 4, (2023)
  • [4] Moresco V，, Oliver D M，, Weidmann M，, Et al., Survival of human enteric and respiratory viruses on plastics in soil，freshwater，and marine environments［J］, Environmental Research, (2021)
  • [5] Rochman C M，, Kurobe T，Flores I，et al. Early warning signs of endocrine disruption in adult fish from the ingestion of polyethylene with and without sorbed chemical pollutants from the marine environment［J］, Science of the Total Environment, 493, (2014)
  • [6] Ahmed A S S, Billah M M, Ali M M，, Et al., Microplastics in aquatic environments： a comprehensive review of toxicity，removal， and remediation strategies［J］, Science of the Total Environment, (2023)
  • [7] Zou Y H, Ye C L，, Pan Y Z., Abundance and characteristics of microplastics in municipal wastewater treatment plant effluent：a case study of Guangzhou，China［J］, Environmental Science and Pollution Research, 28, 9, pp. 11572-11585, (2021)
  • [8] Bai M Y, Zhao S Y，, Peng G Y，, Et al., Occurrence，characteristics of microplastic during urban sewage treatment process［J］, China Environmental Science, 38, 5, pp. 1734-1743, (2018)
  • [9] Gatt I J，, Refalo P., Reusability and recyclability of plastic cosmetic packaging：a life cycle assessment ［J］, Resources，Conservation & Recycling Advances, (2022)
  • [10] Enfrin M, Dumee L F，, Lee J., Nano/microplastics in water and wastewater treatment processes – origin， impact and potential solutions［J］, Water Research, 161, pp. 621-638, (2019)
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