title: Modelling of arsenic retention in constructed wetlands.
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.
authors.affiliation: Catalan Institute for Water Research, Scientific and Technological Park of the University of Girona, H2O Building, C/Emili Grahit 101, E-17003 Girona, Catalonia, Spain. Electronic address: ellorens@icra.cat.
authors.forename: Esther
authors.initials: E
authors.lastname: Llorens
authors.affiliation: Catalan Institute for Water Research, Scientific and Technological Park of the University of Girona, H2O Building, C/Emili Grahit 101, E-17003 Girona, Catalonia, Spain. Electronic address: joshua.obradors@gmail.com.
authors.forename: Joshua
authors.initials: J
authors.lastname: Obradors
authors.affiliation: Center for Advanced Research in Material Science, C/Miguel de Cervantes 120, Complejo Industrial Chihuahua, E-31109 Chihuahua, Mexico. Electronic address: teresa.alarcon@cimav.edu.mx.
authors.forename: María Teresa
authors.initials: MT
authors.lastname: Alarcón-Herrera
authors.affiliation: Chemical and Environmental Engineering Laboratory (LEQUIA), University of Girona, Campus Montilivi s/n, E-17071 Girona, Catalonia, Spain. Electronic address: manuel.poch@udg.edu.
authors.forename: Manel
authors.initials: M
authors.lastname: Poch
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D002138:Calibration; D008956:Models, Chemical; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D053833:Wetlands
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: RCB-ARSENIC; Reed beds; Simulation; Sorption; Uptake