EGU22-6608, updated on 28 Mar 2022
https://doi.org/10.5194/egusphere-egu22-6608
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Transport of dynamically fragmented polystyrene (PS) microplastics through saturated porous media

Ahmad Ameen1,3, Margaret E. Stevenson1,3, Stefan Jakwerth2,3, and A. Paul Blaschke1,3
Ahmad Ameen et al.
  • 1Institute for Hydraulic Engineering and Water Resources Management, Vienna University of Technology (TU Wien), Vienna, Austria.
  • 2Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria.
  • 3Interuniversity Cooperation Centre (ICC) Water and Health, Vienna, Austria.

Insufficient information is available about the transport of fragmented microplastics in groundwater systems. To understand the transport processes, lab-scale column experiments were performed using fragmented microplastics. To mimic realistic microplastics present in the environment, polystyrene (PS) microspheres of diameter 3 and 10 µm were crushed dynamically into fragmented microplastics for injection. We examined the impacts of key physiochemical factors like concentration, soil grain size, flow velocity, ionic strength and straining. The detection and quantification of fragmented microplastics was carried out using solid-phase cytometry (SPC). We observed a high breakthrough of microplastics in coarse soils, and in fine soils, a lesser breakthrough of microplastics was observed because of straining phenomena and wedging of microplastics. Other influencing factors were: (i) greater flow velocity caused detachment and resulted in low attachment efficiency and (ii) ionic strength was found to have a smaller impact on microplastics transport due to their strong negative charge. Results and conclusions from the study provide a baseline of valuable information in order to better understand the mobility of small-sized fragmented microplastics through the soil-aquifer system.

How to cite: Ameen, A., Stevenson, M. E., Jakwerth, S., and Blaschke, A. P.: Transport of dynamically fragmented polystyrene (PS) microplastics through saturated porous media, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-6608, https://doi.org/10.5194/egusphere-egu22-6608, 2022.

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