Volume: 3, 2024
3rd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: E023
DOI: https://doi.org/10.24326/ICDSUPL3.E023
Published online: 24 April 2024
ICDSUPL, 3, E023 (2024)
Kinetics of phosphorus sorption on RockfosR materials with different granulations
Beata Zawadzka1, 2*, Tadeusz Siwiec1, Michał Marzec1
1 Department of Environmental Engineering and Geodesy, University of Life Sciences in Lublin, Leszczyńskiego 7, 20-069 Lublin, Poland
2 Mirosław Zalewski MONT-SAN, Rogoźnica 75, 21-560 Miedzyrzec Podlaski, Poland
* Corresponding author: beata.zawadzka@up.lublin.pl
Abstract
Phosphorus found in insufficiently treated sewage adversely affects the condition of recipients, generating algal blooms and deteriorating water quality. This element is one of the nutrients, quite strictly limited in sewage released into the environment. Removal of phosphorus compounds from wastewater is most often done in a conventional way, biologically or chemically. Nevertheless, the problem of excess phosphorus in discharged sewage is still common, especially in the case of small domestic wastewater treatment plants scattered throughout Poland. For such treatment plants, unconventional methods of removing phosphorus from sewage have been used, consisting in the sorption of nutrients on appropriately selected sorbents. These are innovative methods due to the possibility of recovering and reusing phosphorus compounds, whose resources on Earth are being depleted. The aim of this work was to investigate the kinetics of phosphate retention on RockfosR material. The kinetics of phosphorus sorption were examined at a temperature of 20°C, with a constant dose of sorption material +/– 2.000 mg and with a constant initial concentration of the standard solution +/- 1.00 mg/l. The variables were: shaking time from 1 min to 48 hours and the grain size of the material, i.e. 1.0–1.6 mm, 1.6–2.5 mm and 2.5–5.0 mm. Two models of sorption kinetics were analyzed: a pseudo-first-order model and a pseudo-second-order model. The coefficient of determination R2 for the pseudo-first-order reaction reached a maximum value of only 0.5249 for granulation 1.0–1.6. In the case of the pseudo-second-order model, the coefficient of determination reached comparable values for all three granulations, amounting to R2 > 0.98. A much better fit of the obtained adsorption kinetic data to the pseudo-second-order model indicates the course of chemisorption processes.
Keywords: wastwater, phosphorous, kinetics of phosphorus sorption
How to cite
B. Zawadzka, T. Siwiec, M. Marzec, 2024. Kinetics of phosphorus sorption on RockfosR materials with different granulations. In: 3rd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL3.E023