Phosphorus adsorption/desorption kinetics of bioretention

A bioretention medium has considerable influence on the removal of pollutants, especially phosphorus pollutants. In this paper, the phosphorus adsorption properties of three bioretention media (sand, iron powder, and aluminum powder) are studied, and the effects of pH and ionic strength on the phosp...

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Bibliographic Details
Published in:Thermal science 2020, Vol.24 (4), p.2401-2410
Main Authors: Mei, Ying, Zhu, Xiao-Han, Gao, Long, Zhou, Hang, Xiang, Ya-Jun, Liu, Fang
Format: Article
Language:English
Subjects:
Adsorption
Aluminum
Iron
Phosphorus
Pollutants
Sand
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Summary:A bioretention medium has considerable influence on the removal of pollutants, especially phosphorus pollutants. In this paper, the phosphorus adsorption properties of three bioretention media (sand, iron powder, and aluminum powder) are studied, and the effects of pH and ionic strength on the phosphorus adsorption are analyzed. Results show that the phosphorus adsorption isotherm can be well modeled by the Langmuir equation. The experimental results show the monolayer adsorption capacity of sand is the highest, while the iron powder the lowest. The pH of the solution has a considerable influence on the phosphorus adsorption of sand and iron powder, but has a minimal effect on aluminum powder. nema
ISSN:0354-9836
2334-7163
DOI:10.2298/TSCI2004401M