| Titre : |
A rescue of colors from dye-wastewater : a rescue of colors from dye-wastewater |
| Type de document : |
texte imprimé |
| Auteurs : |
Saloana Santina Gomes Santos, Auteur ; Francisco Rodrigues, Auteur ; Maria Gardênnia Fonseca, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 22-28 |
| Note générale : |
Bibliogr. |
| Langues : |
Français (fre) |
| Catégories : |
Argile
Colorants -- Adsorption
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Eaux usées -- Teneur en colorants
Montmorillonite
Photostabilité
Pigments
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
Contaminants such as dyes unproperly discharged in the environment are a big problem to overcome. Some technologies have been developed and applied for dye-wastewater treatment before its disposal in the waterbodies. Among them, adsorption is highlighted and a plenty of adsorbents are proposed in the literature.
This paper presents some clay minerals-based adsorbents applied for the rescue of colors from dye-wastewater, and the development of new pigments for artworks as an alternative to reuse the dyed adsorbents. |
| Note de contenu : |
- Dyestuffs and the color paradox
- How to remove color from dye-wastewater ?
- The adsorption approaches
- How to characterize the adsorbents ?
- Custom-made clay-based solids for dye removal
- What about the adsorbents after dye removal ? How to discharge them ?
- Dyed adsorbent as new pigments
- Towards new stable and environmentally friendly pigments
- Fig. 1 : Treatment methods for the removal of dyes from wastewater effluent
- Fig. 2 :Adsorption process with adsorbent regeneration step for dyed-water decoloring
- Fig. 3 : Main analytical techniques for characterization of adsorbents
- Fig. 4 : Effect of the time in the dye removal for KSF-montmorillonite C12NH3+ hybrid
- Fig. 5 : KSF-montmorillonite/chitosan beads as adsorbent for Remazol blue dye
- Fig. 6 : Color variation of the hybrids as a function of the exchanged cation
- Fig. 7 : Solid pigments based on alizerin and carminic acid adsorbed onto Al-pillared clay and Ti-pillared clay and oil paint formulations based on these pigments before and after light irradiation
- Fig. 8 : Color of the pigments before and after 400 h under light exposure. Representation ageing of pigments followed by color change observations
- Table 1 : Some classification dyes based on chemical structure
- Table 2 : Examples of clay and clay-based solids as adsorbents for Remazol blue dye |
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in L'ACTUALITE CHIMIQUE > N° 444-445 (10-11/2019) . - p. 22-28
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