Adsorption and desorption of naphthalene in bioretention cells under cold climate conditions

Naphthalene, originating from anthropogenic activities, is a toxic contaminant commonly found in urban stormwater runoff. This study investigated the adsorption and desorption potential of naphthalene in a bioretention cell soil at various temperatures and salinities representative of cold-climate w...

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Bibliographic Details
Published in:Ecological engineering 2021-11, Vol.169, p.106308, Article 106308
Main Authors: Akdeniz, Ceren, Yu, Zhu Hao, Passeport, Elodie
Format: Article
Language:English
Subjects:
Adsorption
Anthropogenic factors
Bioretention cells
Cells
Climate
Climatic conditions
Contaminants
Desorption
Naphthalene
Regeneration
Regeneration (biological)
Retention basins
Runoff
Soil
Soil contamination
Soil temperature
Soils
Storm runoff
Stormwater
Stormwater management
Stormwater runoff
Temperature
Urban runoff
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Summary:Naphthalene, originating from anthropogenic activities, is a toxic contaminant commonly found in urban stormwater runoff. This study investigated the adsorption and desorption potential of naphthalene in a bioretention cell soil at various temperatures and salinities representative of cold-climate winter conditions. In all experiments, more than 70% of the initially added naphthalene was adsorbed on the bioretention soil at equilibrium. Temperature and salinity showed little but inconsistent effects on the adsorption of naphthalene, and the adsorption of naphthalene was partially reversible under some conditions, e.g., at higher temperature. Despite its reversibility, naphthalene desorption may allow for the regeneration of the sorption capacity of the soil media, and transformation processes to take place. Overall, these results suggest that bioretention cells are able to temporarily retain a large portion of the inflowing naphthalene over short periods.
ISSN:0925-8574
1872-6992
DOI:10.1016/j.ecoleng.2021.106308