@inproceedings{81494336bdf9471d82f36bb9e1b9fbfc,
title = "Impact of Biochar on Treatment Performance of Roadside Sand Filters: Field Monitoring and Geochemical Modelling",
abstract = "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.",
keywords = "Biochar amendment, PHREEQC, Stormwater filtration",
author = "Eero Assmuth and Nora Sillanp{\"a}{\"a} and Laura Wendling and Harri Koivusalo",
note = "Funding Information: Based on the modelled SIs, the removal of Cu (Table 1) was likely due to precipitation reactions, suggesting long-term removal. Also Gen{\c c}-Fuhrman et al. (2007) reported Cu precipitation, but precipitation as a possible removal mechanism is often ignored in stormwater studies. Zn, P, Al and Fe may have precipitated within the studied filters, but their removal was likely due to a combination of mechanisms (sorption, physical sieving and precipitation). Physical sieving was likely an important removal mechanism for most of the pollutants as previous studies have shown metals in stormwater to be strongly associated with particulates. This is supported by the minor differences in SIs and removal efficiencies between the filters. Publisher Copyright: {\textcopyright} Springer Nature Switzerland AG 2019. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.; 11th International Conference on Urban Drainage Modelling, UDM 2018 : UDM 2018 ; Conference date: 23-09-2018 Through 26-09-2018",
year = "2019",
month = sep,
day = "1",
doi = "10.1007/978-3-319-99867-1_14",
language = "English",
isbn = "978-3-319-99866-4",
series = "Green Energy and Technology",
publisher = "Springer",
pages = "79--84",
editor = "Giorgio Mannina",
booktitle = "New Trends in Urban Drainage Modelling",
address = "Germany",
}
