Adsorption of Orange II Onto Zn2Al–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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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-11-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2020.573535/full |
| _version_ | 1818387048079294464 |
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| author | Andra Tǎmaş Ioana Cozma Laura Cocheci Lavinia Lupa Gerlinde Rusu |
| author_facet | Andra Tǎmaş Ioana Cozma Laura Cocheci Lavinia Lupa Gerlinde Rusu |
| author_sort | Andra Tǎmaş |
| collection | DOAJ |
| 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 Zn2Al-layered double hydroxide, prepared from an industrial waste (zinc ash) as a zinc source, was investigated in the Orange II dye adsorption process. The Zn2Al-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 Zn2Al-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 (qmax,exp = 42.5 mg/g at 293 K) than the material prepared from reagents (qmax,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. |
| first_indexed | 2024-12-14T04:03:45Z |
| format | Article |
| id | doaj.art-6062676245b0413b9263fedbf500ad28 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-14T04:03:45Z |
| publishDate | 2020-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-6062676245b0413b9263fedbf500ad282022-12-21T23:17:53ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-11-01810.3389/fchem.2020.573535573535Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc AshAndra Tǎmaş0Ioana Cozma1Laura Cocheci2Lavinia Lupa3Gerlinde Rusu4Faculty of Industrial Chemistry and Environmental Engineering, University Politehnica Timisoara, Timisoara, Romania“Coriolan Dragulescu” Institute of Chemistry, Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, University Politehnica Timisoara, Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, University Politehnica Timisoara, Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, University Politehnica Timisoara, Timisoara, RomaniaThe 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 Zn2Al-layered double hydroxide, prepared from an industrial waste (zinc ash) as a zinc source, was investigated in the Orange II dye adsorption process. The Zn2Al-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 Zn2Al-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 (qmax,exp = 42.5 mg/g at 293 K) than the material prepared from reagents (qmax,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.https://www.frontiersin.org/articles/10.3389/fchem.2020.573535/fulllayered double hydroxideszinc ash wasteOrange II adsorptionequilibriumkineticsthermodynamics |
| spellingShingle | Andra Tǎmaş Ioana Cozma Laura Cocheci Lavinia Lupa Gerlinde Rusu Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash Frontiers in Chemistry layered double hydroxides zinc ash waste Orange II adsorption equilibrium kinetics thermodynamics |
| title | Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash |
| title_full | Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash |
| title_fullStr | Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash |
| title_full_unstemmed | Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash |
| title_short | Adsorption of Orange II Onto Zn2Al–Layered Double Hydroxide Prepared From Zinc Ash |
| title_sort | adsorption of orange ii onto zn2al layered double hydroxide prepared from zinc ash |
| topic | layered double hydroxides zinc ash waste Orange II adsorption equilibrium kinetics thermodynamics |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2020.573535/full |
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