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Título: | Highly efficient removal of metallic ions by using a linde type-A zeolite obtained from a hazardous waste |
Autor: | Lobo-Recio, María de los Angeles; Rodrigues, C.; Custódio Jeremias, T.; Lapolli, F.R.; Padilla, Isabel CSIC ORCID ; López-Delgado, Aurora CSIC ORCID | Palabras clave: | Adsorption isotherms Adsorption kinetics Factorial design Linde Type-A zeolite Mine-impacted water (MIW) |
Fecha de publicación: | 2021 | Editor: | Elsevier | Citación: | Chemosphere 267: 128919 (2021) | Resumen: | Coal acid mine drainage (AMD) contaminates natural water to form mine-impacted water (MIW), which is characterized by high levels of acidity, sulfate, and metallic ions. This study investigates the use of a Linde Type-A (LTA) zeolite obtained from a hazardous industrial waste for Al3+, Fe2+, and Mn2+ removal from synthetic aqueous solutions. The aim of this study is to stablish a basis for the subsequent treatment of MIW in order to obtain reuse water. In a central composite rotatable design (CCRD) study, 8.25 g L¿1 zeolite and 147 rpm were the optimal conditions for treating the multicomponent solution, yielding 99.9, 99.9 and 99.3% removal for Al3+, Fe2+, and Mn2+, respectively. Isothermal studies showed that the affinity of the ions by the zeolite were ranked as Al3+>Mn2+>Fe2+. The best fitting isothermal models for monocomponent solutions were Tóth, Freundlich, and Sips for Al3+, Fe2+, and Mn2+, respectively. In the multicomponent solution, Sips and Freundlich were the better fitting models for Al3+ and Mn2+, respectively, indicating a weakness of the sorbate-sorbent interactions. Kinetic studies revealed that the quantitative removal of Al3+ was achieved in 5 min. The multicomponent solution was transformed into water that was suitable for non-potable use after an optimal time of 60 min. The results demonstrate that LTA zeolite synthetized from hazardous waste has a high potential for remediating contaminated water by metallic ions at low dosages and short times. Using LTA zeolite for remediating contaminated water could make a positive contribution to the circular economy and environmental sustainability. | Versión del editor: | https://doi.org/10.1016/j.chemosphere.2020.128919 | URI: | http://hdl.handle.net/10261/251342 | DOI: | 10.1016/j.chemosphere.2020.128919 | Identificadores: | doi: 10.1016/j.chemosphere.2020.128919 issn: 0045-6535 |
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