| Abstrakt: |
Featured Application: Nanoclays can be used as adsorbent for waste water in several industries as textile. In addition the hybrid composites generated after the dye adsorption can be used as pigments in several applications as textile stamp, polymer composites (filature), 3d printing, ceramic, cosmetic or even food industries depending on the hybrid components (natural dyes). Finally the desorption of the dyes is also possible with the nanoclays, allowing their reuse in other applications as textile dyeing, closing the manufacture circle without residues. Wastewater recovery is one of the most pressing contaminant-related subjects in the textile industry. Many cleaning and recovery techniques have been applied in recent decades, from physical separation to chemical separation. This work reviews textile wastewater recovery by focusing on natural or synthetic nanoclays in order to compare their capabilities. Presently, a wide variety of nanoclays are available that can adsorb substances dissolved in water. This review summarizes and describes nanoclay modifications for different structures (laminar, tubular, etc.) to compare adsorption performance under the best conditions. This adsorbent capacity can be used in contaminant industries to recover water that can be used and be recontaminated during a second use to close the production circle. It explores and proposes future perspectives for the nanoclay hybrid compounds generated after certain cleaning steps. This is a critical review of works that have studied adsorption or desorption procedures for different nanoclay structures. Finally, it makes a future application proposal by taking into account the summarized pros and cons of each nanoclay. This work addresses contaminant reuse, where part of the employed dyes can be reused in printing or even dyeing processes, depending on the fixing capacity of the dye in the nanoclay, which is herein discussed. [ABSTRACT FROM AUTHOR] |
