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How effective is the retention of microplastics in horizontal flow sand filters treating stormwater?

Journal of Environmental Management 2023 27 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Jes Vollertsen Gabriella Rullander, Claudia Lorenz, Claudia Lorenz, Gabriella Rullander, Gabriella Rullander, Gabriella Rullander, Gabriella Rullander, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Claudia Lorenz, Claudia Lorenz, Gabriella Rullander, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Jes Vollertsen Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Ann‐Margret Strömvall, Roger B. Herbert, Ann‐Margret Strömvall, Claudia Lorenz, Jes Vollertsen Ann‐Margret Strömvall, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Claudia Lorenz, Sahar Dalahmeh, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Jes Vollertsen Ann‐Margret Strömvall, Sahar Dalahmeh, Claudia Lorenz, Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Claudia Lorenz, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Jes Vollertsen Claudia Lorenz, Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Gabriella Rullander, Claudia Lorenz, Jes Vollertsen Gabriella Rullander, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Jes Vollertsen Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Sahar Dalahmeh, Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Ann‐Margret Strömvall, Jes Vollertsen Jes Vollertsen Jes Vollertsen Ann‐Margret Strömvall, Jes Vollertsen Claudia Lorenz, Jes Vollertsen Jes Vollertsen Claudia Lorenz, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Sahar Dalahmeh, Jes Vollertsen Jes Vollertsen Claudia Lorenz, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Claudia Lorenz, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen Claudia Lorenz, Claudia Lorenz, Jes Vollertsen Jes Vollertsen Claudia Lorenz, Jes Vollertsen Jes Vollertsen Jes Vollertsen Jes Vollertsen

Summary

Researchers tested the removal efficiency of lab-scale horizontal flow sand filters of three lengths (25, 50, and 100 cm) for four types of microplastics commonly found in stormwater, finding that more than 98% of microplastics were retained in all filters regardless of particle shape, size, or density. Sand filtration is highly effective for removing microplastics from stormwater runoff before it reaches freshwater recipients.

Polymers

PA PE PET PP

Study Type Environmental

Microplastics accumulate in stormwater and can ultimately enter freshwater recipients, and pose a serious risk to aquatic life. This study investigated the effectiveness of lab-scale horizontal flow sand filters of differing lengths (25, 50 and 100 cm) in retaining four types of thermoplastic microplastics commonly occurring in stormwater runoff (polyamide, polyethylene, polypropylene, and polyethylene terephthalate). Despite the differences in particle shape, size and density, the study revealed that more than 98% of the spiked microplastics were retained in all filters, with a slightly increased removal with increased filter length. At a flow rate of 1 mL/min and after one week of operation, 62-84% of the added microplastics agglomerated in the first 2 cm of the filters. The agglomerated microplastics included 96% of high-density fibers. Larger-sized particles were retained in the sand media, while microplastics smaller than 50 μm were more often detected in the effluent. Microplastics were quantified and identified using imaging based micro Fourier Transform Infrared Spectroscopy. The efficient retention of microplastics in low-flow horizontal sand filters, demonstrated by the results, highlights their potential importance for stormwater management. This retention is facilitated by various factors, including microplastic agglomeration, particle sedimentation of heavy fibers and favorable particle-to-media size ratios.

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