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<p>Microplastics (MPs) are emerging pollutants which pose increasingly severe threats to the global environment. To understand the potential impacts of MPs pollution on aquatic ecosystems, numerous studies have investigated the toxic effects of MPs on microalgae. However, there is still no definitive conclusion regarding the specific impacts of different concentrations of MPs on microalgal growth. To clarify the specific impacts of different concentrations of MPs on microalgal growth, this study focused on how varying polyvinyl chloride microplastics (PVC-MPs) concentrations (particularly high levels) affect <i>Chlorella vulgaris</i> HL01 (<i>C. vulgaris</i> HL01) growth. The experimental results indicate that low concentrations of PVC-MPs (50&#xa0;mg/L and 100&#xa0;mg/L) exert a slight inhibitory effect on the growth of <i>C. vulgaris</i> HL01. Higher concentrations (200&#xa0;mg/L) show an increasingly potent inhibitory effect over time, with an inhibition rate reaching up to 34%. Additionally, at concentrations of 300&#xa0;mg/L and 400&#xa0;mg/L, PVC-MPs initially inhibited the growth of <i>C. vulgaris</i> HL01, which was followed by a promoting effect. This biphasic effect was further corroborated by analyses of key active enzyme concentrations, three-dimensional fluorescence spectral analysis, and characterization via scanning electron microscopy (SEM) and optical microscopy. These findings provide a reference research basis for analyzing the specific impacts of PVC-based MPs on the growth of <i>Chlorella</i> in aquatic environments.</p>

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Effects of polyvinyl chloride microplastics on the growth characteristics of Chlorella vulgaris HL01

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Chuntan Chen,
  • Ying Li,
  • Wenwen Dong,
  • Yuqi Mo,
  • Xin Liu,
  • Hanyi Liu,
  • Yun Luo

摘要

Microplastics (MPs) are emerging pollutants which pose increasingly severe threats to the global environment. To understand the potential impacts of MPs pollution on aquatic ecosystems, numerous studies have investigated the toxic effects of MPs on microalgae. However, there is still no definitive conclusion regarding the specific impacts of different concentrations of MPs on microalgal growth. To clarify the specific impacts of different concentrations of MPs on microalgal growth, this study focused on how varying polyvinyl chloride microplastics (PVC-MPs) concentrations (particularly high levels) affect Chlorella vulgaris HL01 (C. vulgaris HL01) growth. The experimental results indicate that low concentrations of PVC-MPs (50 mg/L and 100 mg/L) exert a slight inhibitory effect on the growth of C. vulgaris HL01. Higher concentrations (200 mg/L) show an increasingly potent inhibitory effect over time, with an inhibition rate reaching up to 34%. Additionally, at concentrations of 300 mg/L and 400 mg/L, PVC-MPs initially inhibited the growth of C. vulgaris HL01, which was followed by a promoting effect. This biphasic effect was further corroborated by analyses of key active enzyme concentrations, three-dimensional fluorescence spectral analysis, and characterization via scanning electron microscopy (SEM) and optical microscopy. These findings provide a reference research basis for analyzing the specific impacts of PVC-based MPs on the growth of Chlorella in aquatic environments.