Impact of Biochar on Treatment Performance of Roadside Sand Filters – Field Monitoring and Geochemical Modelling

Eero Assmuth, Nora Sillanpää, Laura Wendling, Harri Koivusalo

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)


Roadside filters can be used to treat polluted stormwater. In this study, sand and sand-biochar filters were investigated in full-scale field conditions during three rain events. Stormwater influent and effluent of the filters were sampled with high frequency and up to 29 water quality parameters were determined. The obtained field data was analyzed and used as an input for geochemical modelling. The study showed promising results for both filter types with respect to retention of metals, total suspended solids and total phosphorus. Biochar amendment had clear improvement only for nitrogen removal; some release of organic carbon from biochar filter material was observed. Concentrations of most measured parameters varied considerably during and between the studied events. Geochemical modelling showed that precipitation is one possible removal mechanisms for many pollutants along with sorption and physical filtration.
Original languageEnglish
Title of host publicationNew Trends in Urban Drainage Modelling
Subtitle of host publicationUDM 2018
EditorsGiorgio Mannina
ISBN (Electronic)978-3-319-99867-1
ISBN (Print)978-3-319-99866-4
Publication statusPublished - 2019
MoE publication typeA4 Conference publication
EventInternational Conference on Urban Drainage Modelling - Palermo, Italy
Duration: 23 Sept 201826 Sept 2018
Conference number: 11

Publication series

NameGreen Energy and Technology
ISSN (Print)1865-3529
ISSN (Electronic)1865-3537


ConferenceInternational Conference on Urban Drainage Modelling
Abbreviated titleUDM


  • Stormwater filtration
  • Biochar amendment


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