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Modelling of arsenic retention in constructed wetlands

Lookup NU author(s): Joshua Obradors Prats

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Abstract

A new model was developed in order to simulate the most significant arsenic retention processes that take place in constructed wetlands (CWs) treating high arsenic waters. The present contribution presents the implementation phases related to plants (arsenic uptake and accumulation, root arsenic adsorption, and root oxygen release), showing the first simulation results of the complete model. Different approaches with diverse influent configurations were simulated. In terms of total arsenic concentrations in effluent, the simulated data closely matched the data measured in all evaluated cases. The iron and arsenic species relationships, and the arsenic retention percentages obtained from simulations, were in agreement with the experimental data and literature. The arsenic retention efficiency increased whenever a new phase was implemented, reaching a maximum efficiency range of 85–95%. According to the quality of the obtained results, it can be considered that the implementation of all steps of RCB-ARSENIC provided reasonably good response values.

Publication metadata

Author(s): Llorens E, Obradors J, Alarcon-Herrera MT, Poch M

Publication type: Article

Publication status: Published

Journal: Bioresource Technology

Year: 2013

Volume: 147

Pages: 221-227

Print publication date: 09/08/2013

ISSN (print): 0960-8524

ISSN (electronic): 1873-2976

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.biortech.2013.08.012

DOI: 10.1016/j.biortech.2013.08.012

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