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http://hdl.handle.net/1843/61193| Type: | Artigo de Periódico |
| Title: | Layered double hydroxides for remediation of industrial wastewater containing manganese and fluoride |
| Authors: | Mariana Araujo Teixeira Aparecida Barbosa Magestete Anderson Dias Luciano Sindra Virtuoso Kisla Prislen Félix Siqueira |
| Abstract: | This work describes an environmentally-friendly procedure for the removal of manganese and fluoride from industrial wastewaters (IW) using layered double hydroxides (LDHs) and calcined layered double oxides (LDOs). Ternary Mg-Mn-Al LDHs (LDH-IW) were produced from IW containing a high concentration of manganese, which decreased from (99.420 ± 3.110) mg L−1 to (0.003 ± 0.001) mg L−1 after the synthesis procedure. Synthetic Mg-Al LDH was also produced for comparison purposes. Both materials were calcined and the resulting oxides (LDO and LDO-IW) were used for the removal of fluoride present in the same IW. The materials were characterized by X-ray diffraction, electron energy-loss spectroscopy, thermal analysis, Raman spectroscopy, and electron microscopy. The kinetics and adsorption isotherms for fluoride removal from aqueous solutions were studied in batch mode. For both LDO and LDO-IW, the adsorption of fluoride followed pseudo-second order reaction kinetics. Langmuir-type adsorption was observed for LDO, while adsorption by LDO-IW was according to the Freundlich model. The results showed that the oxides were able to remove 94% of the fluoride present in the IW at an initial concentration of 162 mg L−1. The procedure reduced the concentrations of the pollutants (manganese and fluoride) to levels that complied with Brazilian effluent standards. |
| Subject: | Águas residuais - Purificação Manganês Fluorose Poluentes Hidróxidos Raios X - Difração Adsorção Efluente - Qualidade |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.jclepro.2017.10.010 |
| URI: | http://hdl.handle.net/1843/61193 |
| Issue Date: | 2018 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0959652617323016 |
| metadata.dc.relation.ispartof: | Journal of Cleaner Production |
| Appears in Collections: | Artigo de Periódico |
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