Utvärdering av filtermaterial för att avlägsna lösta organiska föroreningar i dagvatten / Evaluation of filter materials for the removal of organic contaminants in stormwater

Utvärdering av filtermaterial för att avlägsna lösta organiska föroreningar i dagvatten / Evaluation of filter materials for the removal of organic contaminants in stormwater

Stormwater is frequently contaminated with organic pollutants such as polycyclic aromatic hydrocarbons (PAHs), phthalates and alkylphenols emitted from traffic and building materials. Filters with adsorbing materials have the potential to remove dissolved, colloidal and particulate organic pollutants from stormwater. The aim of this research project is to investigate how effectively filter materials remove dissolved organic pollutants from stormwater. 11 materials were investigated in batch tests with synthetic stormwater: PAHs, phthalates and alkylphenols in concentrations ranging from 10 to 300 μg/L and dissolved organic matter were mixed with the materials for 10 min to 24 h, after which residual concentrations of compounds in the aqueous phase were analyzed. The materials chitosan, cellulose, zeolite, perlite and vermiculite exhibited limited adsorption of the investigated pollutants. However, pine bark and plastic fibers could remove most contaminants by ≥ 70 %. Untreated and treated pine bark from different manufacturers showed similar adsorption capacity; it is therefore not critical which pine bark product is used. A large proportion of the contaminants were adsorbed within 10 min of contact with the barks. Continued studies should focus on the practical application of the materials and optimization of filter facilities.

Författare Karin Björklund, Loretta Y. Li
Årgång 2019
Nummer 2
Sida 205-2016
Nyckelord Alkylphenols, alternative materials, PAH, phthalates, sorption studies, stormwater quality, stormwater management
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