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Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash

The dye industry is one of the largest water consuming industries, and at the same time generates large quantities of wastewaters. The resulting wastewaters require proper treatment before discharge, because the dye contents have a negative effect on the water body and organisms present in it. The m...

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Autores principales: Tǎmaş, Andra, Cozma, Ioana, Cocheci, Laura, Lupa, Lavinia, Rusu, Gerlinde
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7793787/
https://www.ncbi.nlm.nih.gov/pubmed/33425845
http://dx.doi.org/10.3389/fchem.2020.573535
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author Tǎmaş, Andra
Cozma, Ioana
Cocheci, Laura
Lupa, Lavinia
Rusu, Gerlinde
author_facet Tǎmaş, Andra
Cozma, Ioana
Cocheci, Laura
Lupa, Lavinia
Rusu, Gerlinde
author_sort Tǎmaş, Andra
collection PubMed
description The dye industry is one of the largest water consuming industries, and at the same time generates large quantities of wastewaters. The resulting wastewaters require proper treatment before discharge, because the dye contents have a negative effect on the water body and organisms present in it. The most efficient treatment method for water containing dyes is represented by adsorption processes. The challenge with these adsorption processes is to develop new, efficient, viable, and economic adsorbent materials. Therefore, in the present paper, the performance of Zn(2)Al-layered double hydroxide, prepared from an industrial waste (zinc ash) as a zinc source, was investigated in the Orange II dye adsorption process. The Zn(2)Al-layered double hydroxide prepared from secondary sources presents similar morphological and structural characteristics as those prepared from analytical grade reagents. The influence of initial dye concentration, adsorption time, solid:liquid ratio, pH, and temperature was evaluated in order to confirm the benefit of this waste valorization. A comparison with the reference Zn(2)Al-layered double hydroxide prepared from analytical grade reagents was performed and the results show that due to the small presence of impurities, the material prepared from zinc ash shows better adsorption capacities (q(max,exp) = 42.5 mg/g at 293 K) than the material prepared from reagents (q(max,exp) = 36.9 mg/g at 293 K), justifying the utilization of secondary sources for layered double hydroxides preparation. The proposed treatment process presents advantages from both economic and environmental protection point of view.
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spelling pubmed-77937872021-01-09 Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash Tǎmaş, Andra Cozma, Ioana Cocheci, Laura Lupa, Lavinia Rusu, Gerlinde Front Chem Chemistry The dye industry is one of the largest water consuming industries, and at the same time generates large quantities of wastewaters. The resulting wastewaters require proper treatment before discharge, because the dye contents have a negative effect on the water body and organisms present in it. The most efficient treatment method for water containing dyes is represented by adsorption processes. The challenge with these adsorption processes is to develop new, efficient, viable, and economic adsorbent materials. Therefore, in the present paper, the performance of Zn(2)Al-layered double hydroxide, prepared from an industrial waste (zinc ash) as a zinc source, was investigated in the Orange II dye adsorption process. The Zn(2)Al-layered double hydroxide prepared from secondary sources presents similar morphological and structural characteristics as those prepared from analytical grade reagents. The influence of initial dye concentration, adsorption time, solid:liquid ratio, pH, and temperature was evaluated in order to confirm the benefit of this waste valorization. A comparison with the reference Zn(2)Al-layered double hydroxide prepared from analytical grade reagents was performed and the results show that due to the small presence of impurities, the material prepared from zinc ash shows better adsorption capacities (q(max,exp) = 42.5 mg/g at 293 K) than the material prepared from reagents (q(max,exp) = 36.9 mg/g at 293 K), justifying the utilization of secondary sources for layered double hydroxides preparation. The proposed treatment process presents advantages from both economic and environmental protection point of view. Frontiers Media S.A. 2020-11-30 /pmc/articles/PMC7793787/ /pubmed/33425845 http://dx.doi.org/10.3389/fchem.2020.573535 Text en Copyright © 2020 Tǎmaş, Cozma, Cocheci, Lupa and Rusu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Tǎmaş, Andra
Cozma, Ioana
Cocheci, Laura
Lupa, Lavinia
Rusu, Gerlinde
Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title_full Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title_fullStr Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title_full_unstemmed Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title_short Adsorption of Orange II Onto Zn(2)Al–Layered Double Hydroxide Prepared From Zinc Ash
title_sort adsorption of orange ii onto zn(2)al–layered double hydroxide prepared from zinc ash
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7793787/
https://www.ncbi.nlm.nih.gov/pubmed/33425845
http://dx.doi.org/10.3389/fchem.2020.573535
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