Scholarlink

<p>The transport behavior of microplastics (MPs) as a new type of pollutant in porous media has received widespread attention. Dissolved organic matter (DOM) in water can cause heterogeneous aggregation of MPs through adsorption processes, thereby affecting their migration and diffusion in water. And different sizes of MPs are often affected to varying degrees in the natural environment. In this study, two sizes of polystyrene microspheres (PS) (1.0&#xa0;μm and 5.0&#xa0;μm) were selected as representatives of MPs, and high-density silica microspheres (SiO<sub>2</sub>) were selected as the representative of natural inorganic particles for the comparative experiment. Boll serum albumin (BSA) and sodium alginate (SA) were selected as representatives of proteins and polysaccharides, respectively. The cotransport behaviors of PS/SiO<sub>2</sub> in the presence of BSA/SA with different flow velocities (1.02&#xa0;cm/min and 5.10&#xa0;cm/min) were investigated through laboratory column experiments to explore the influence degree of the dominant factors. Through the&#xa0;breakthrough experiment results showed that BSA/SA induced complexity in the transport and retention behaviors of PS/SiO<sub>2</sub>, and the transport-retention mechanism and sensitivity analysis were discussed to better comprehend the cotransport behaviors. The change rate of <i>C/C</i><sub>0</sub> was highly sensitive to the change rate of particle size at 1.02&#xa0;cm/min, and the change rate of <i>C/C</i><sub>0</sub> is highly sensitive to the change rate of flow velocity for 5.0&#xa0;μm particles. Moreover, the corresponding sensitivity was weakened to varying degrees when BSA and SA were present. In-depth research into the migration behavior of these complexes formed by biomass macromolecules and colloidal particles is of significant theoretical and practical importance for understanding and improving the deep removal process of MPs in water environment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Cotransport of Different-Density Microspheres and Polysaccharides or Proteins with Various Particle Sizes and Flow Velocities in Saturated Porous Media

  • 期刊论文

  • 发表日期：

    2026年6月25日

查看全文
  • Yang Wang,
  • Dejia Liu,
  • Wanting Wu,
  • Wenda Tan,
  • Yuxuan Xie

摘要

The transport behavior of microplastics (MPs) as a new type of pollutant in porous media has received widespread attention. Dissolved organic matter (DOM) in water can cause heterogeneous aggregation of MPs through adsorption processes, thereby affecting their migration and diffusion in water. And different sizes of MPs are often affected to varying degrees in the natural environment. In this study, two sizes of polystyrene microspheres (PS) (1.0 μm and 5.0 μm) were selected as representatives of MPs, and high-density silica microspheres (SiO2) were selected as the representative of natural inorganic particles for the comparative experiment. Boll serum albumin (BSA) and sodium alginate (SA) were selected as representatives of proteins and polysaccharides, respectively. The cotransport behaviors of PS/SiO2 in the presence of BSA/SA with different flow velocities (1.02 cm/min and 5.10 cm/min) were investigated through laboratory column experiments to explore the influence degree of the dominant factors. Through the breakthrough experiment results showed that BSA/SA induced complexity in the transport and retention behaviors of PS/SiO2, and the transport-retention mechanism and sensitivity analysis were discussed to better comprehend the cotransport behaviors. The change rate of C/C0 was highly sensitive to the change rate of particle size at 1.02 cm/min, and the change rate of C/C0 is highly sensitive to the change rate of flow velocity for 5.0 μm particles. Moreover, the corresponding sensitivity was weakened to varying degrees when BSA and SA were present. In-depth research into the migration behavior of these complexes formed by biomass macromolecules and colloidal particles is of significant theoretical and practical importance for understanding and improving the deep removal process of MPs in water environment.