Adsorption of Organic Pollutants in Stormwater: Evaluation of Four Potential Sorbents
Paper i proceeding, 2014

Adsorption filters is one of the most promising techniques for removal of dissolved, colloidal and particulate pollutants from stormwater. The aim of this study was to compare the capacity of four filter materials – zeolite, cellulose, polypropylene/polyethylene (PP/PE) fibres and pine bark – to adsorb organic pollutants frequently detected in stormwater. In batch tests, synthetic stormwater spiked with polycyclic aromatic hydrocarbons (PAHs), alkylphenols and phthalates was contacted with media for up to 24 h. The compounds were then liquid-liquid extracted and analyzed using GC-MS. Zeolite and cellulose showed very low sorption capacity for the organic contaminants, whereas >70% of the initial concentration of all tested compounds was removed using PP/PE fibres, and >80% with pine bark. The highest adsorption capacity was found for PAHs (up to 44 µg/g) using PP/PE fibres and bark. For all tested compounds, maximum adsorption was approached within 30 min using these materials. Future research using natural stormwater should investigate the effect of colloidal transport of pollutants through PP/PE fibres and pine bark and the materials’ capacities to adsorb other pollutants, including metals.

Adsorption filter

stormwater treatment

priority pollutants

mineral and wood-based media

Författare

Karin Björklund

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Loretta Li

Proceedings of the 13th International Conference on Urban Drainage

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Ämneskategorier

Vattenteknik

Miljövetenskap