Mathematical modeling of constructed wetlands for hexavalent chromium removal.

Autor: Karametos I; Department of Civil Engineering, Democritus University of Thrace, Xanthi 67100, Greece., Vasiliadou IA; Department of Chemical Engineering, Western University of Macedonia, Kozani 50100, Greece. Electronic address: ivasiliadou@uowm.gr., Papaevangelou V; Department of Civil Engineering, Democritus University of Thrace, Xanthi 67100, Greece., Sultana MY; Department of Sustainable Agriculture, University of Patras, 2 G. Seferi Str., Agrinio 30100, Greece., Tekerlekopoulou AG; Department of Sustainable Agriculture, University of Patras, 2 G. Seferi Str., Agrinio 30100, Greece., Vayenas DV; Department of Chemical Engineering, University of Patras, Rio, GR-26504 Patras, Greece; Institute of Chemical Engineering Sciences (FORTH/ICE-HT), Stadiou Str., Platani, 26504 Patras, Greece., Akratos CS; Department of Civil Engineering, Democritus University of Thrace, Xanthi 67100, Greece.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Mar 20; Vol. 917, pp. 170088. Date of Electronic Publication: 2024 Jan 14.
DOI: 10.1016/j.scitotenv.2024.170088
Abstrakt: Constructed wetlands (CWs) have been extensively used in Cr(VI) removal and have proven their ability to achieve high removal efficiencies. Although, numerous studies have been published in the past years presenting experimental results of CWs treating wastewater with Cr(VI) concentrations, a mathematical modeling describing the processes for Cr(VI) removal in CWs is lacking. In this work a mathematical model was developed, able to accurately describe the main mechanisms and reactions (i.e. biological reduction, plant biomass uptake-sorption) which are responsible for Cr(VI) removal in a wetland system. The model was calibrated and validated using data from a previously reported experimental study of horizontal subsurface CWs. Mathematical simulation indicates that in an unplanted wetland Cr(VI) was mainly removed through the diffusion/reduction process inside biofilm, attached on the porous media, while in the planted unit Cr(VI) was mainly removed through the sorption process to the root system of the plants. The developed model's simulations showed high correlation between predicted and experimental data, indicating that the proposed model can be used to design and predict full scale constructed wetland process for Cr(VI) removal.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
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