|
|
微塑料在竖直固定的多孔介质中迁移特性探究
|
Abstract:
随着全世界的水环境中微塑料的数量仍然在持续增长，对于人类健康安全具有巨大的潜在威胁。为探究微塑料在竖直方向上的运移特性，本文以聚苯乙烯为运移微粒，石英砂为多孔介质，垂直固定有机玻璃柱，进行了土柱试验。试验结果表明，一般情况下，随着流速增大或浓度增加，穿透曲线的峰值逐渐增大，会促进微粒在多孔介质中的运移，当工作溶液浓度较高时，流速的增大反而会抑制微粒在多孔介质中的迁移。这为微塑料迁移研究提供了参考价值。
As the amount of microplastics in the water environment continues to grow worldwide, there is a huge potential threat to human health and safety. In order to explore the transport mechanism of microplastics in the vertical direction, the soil column test was carried out in this paper with poly-styrene as the transport particle and quartz sand as the porous medium, and the plexiglass column was fixed vertically. The experimental results show that, in general, with the increase of flow rate or concentration, the peak of penetration curve increases gradually, which will promote the transport of particles in the porous media. When the concentration of working solution is high, the increase of flow rate will inhibit the migration of particles in the porous media. This provides reference value for the study of microplastics migration.
| [1] | Hüffer, T., Metzelder, F., Sigmund, G., et al. (2019) Polyethylene Microplastics Influence the Transport of Organic Contaminants in Soil. Science of the Total Environment, 657, 242-247. https://doi.org/10.1016/j.scitotenv.2018.12.047 |
| [2] | Horton, A.A., Walton, A., Spurgeon, D.J., et al. (2017) Microplastics in Freshwater and Terrestrial Environments: Evaluating the Current Understanding to Identify the Knowledge Gaps and Future Research Priorities. Science of the Total Environment, 586, 127-141. https://doi.org/10.1016/j.scitotenv.2017.01.190 |
| [3] | Watkins, L., McGrattan, S., Sullivan, P.J., et al. (2019) The Effect of Dams on River Transport of Microplastic Pollution. Science of the Total Environment, 664, 834-840. https://doi.org/10.1016/j.scitotenv.2019.02.028 |
| [4] | He, L., Wu, D., Rong, H., et al. (2018) Influence of Nano- and Microplastic Particles on the Transport and Deposition Behaviors of Bacteria in Quartz Sand. Environmental Science & Technology. https://doi.org/10.1021/acs.est.8b01673 |
| [5] | Cai, L., He, L., Peng, S., et al. (2019) Influence of Titanium Dioxide Nanoparticles on the Transport and Deposition of Microplastics in Quartz Sand. Environmental Pollution, 253, 351-357. https://doi.org/10.1016/j.envpol.2019.07.006 |
| [6] | Li, M., He, L., Zhang, M., et al. (2019) Cotransport and Deposition of Iron Oxides with Different-Sized Plastic Particles in Saturated Quartz Sand. Environ-mental Science & Technology, 53, 3547-3557. https://doi.org/10.1021/acs.est.8b06904 |
| [7] | 曹钢. 饱和多孔介质中球磨生物炭的迁移及与Cd的交互作用[D]: [硕士学位论文]. 咸阳: 西北农林科技大学, 2019. |
| [8] | 谢冰怡. 不同类型胶体对铅、镉在饱和多孔介质中运移的影响研究[D]: [硕士学位论文]. 咸阳: 西北农林科技大学, 2017. |
| [9] | 任艳. 碱性环境下悬浮颗粒迁移特性的试验研究[D]: [硕士学位论文]. 北京: 北京交通大学, 2016. |
