Occurrence, concentration, and distribution of 38 organic micropollutants in the filter material of 12 stormwater bioretention facilities

Abundance, Distribution, and Composition of Microplastics in the Filter Media of Nine Aged Stormwater Bioretention Systems

“…Similar guidance has been suggested concerning heavy metals and a number of organic pollutants (e.g. Al-Ameri et al, 2018;Blecken et al, 2011;Tedoldi et al, 2017;Furén et al, 2022). This study confirms the suitability of this approach for microplastics.…”

“…This is dependent on (inter alia) pollutant concentrations and relevant guideline target values, as e.g. discussed for organic micropollutants by Furén et al (2022). Corresponding guidelines defining microplastic concentrations in soil or sediment are (to the best knowledge of the authors) not yet available.…”

“…However, these studies do not reveal where in the filter the microplastics are trapped which has, inter alia, impact on their long-term performance including the need for (partial) replacement of the filter material as discussed by Al-Ameri et al (2018) for metals and Furén et al (2022) for organic micropollutants (for the same filters as included in this study). Further, knowledge on accumulation and pathways of microplastic in the filter material will also contribute to understanding the treatment processes of microplastics which may vary from other sediment e.g.…”

“…In addition, attention has focused almost exclusively on recently constructed stormwater controls (Koutnik et al, 2022b;Mbachu et al, 2022). Despite their impact on the maintenance of bioretention (especially replacement of filter material; Furén et al, 2022), empirical knowledge of microplastic accumulation patterns in older bioretention facilities is nonexistent.…”

Performance of a Gross Pollutant Trap-Biofilter and Sand Filter Treatment Train for the Removal of Organic Micropollutants from Highway Stormwater (Field Study)

“…MWH-PAHs, HWH-PAHs and C 16 -C 40 fractions typically have a much higher particle-bound fraction compared to BPA, OP, and NP, because they have less solubility, higher hydrophobicity (larger K OW ), and more absorbability of organic content of sediments and Fe particles (larger K OC ) (see Table S4, Table S5, Table S6) (Andersson et al, 2018;Diblasi et al, 2009;Leroy et al, 2016). Therefore, the quantified PAHs and PHCs were more likely to be retained in the SF medium by a particle (TSS) filtering process (David et al, 2015;Furén et al, 2022) than the phenolic substances for which a higher dissolved/colloidal phase breakthrough may occur (Gasperi et al, 2022;Ruppelt et al, 2020;Shehab et al, 2020). Flanagan et al (2018) also reported that alkylphenols are less efficiently removed by a bioswale facility than PAHs and PHCs, having higher partitioning to suspended solids.…”