Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads

DOI: 10.22161/ijeab/2.4.48

Keyword: Adsorption, Alginate-chitosan beads, Desorption, Textile dye removal, Thermal analysis.

Abstract: Alginate-chitosan beads were used as adsorbent to remove two azo anionic textile dyes, Direct Blue 78 and Direct Yellow 106, from aqueous solutions. Batch mode experiments of dyes adsorption were performed and the effects of various parameters such as contact time, adsorbent dosage, initial dye concentration, pH and temperature were examined. Successively, the dyes have been desorbed from the adsorbent and were recycled to dye a cotton fabric. The maximum efficiencies in dye removal, performed at pH 6, 298 K and with 0.5 g of adsorbent, were found to be about 97% for Direct Blue 78 and about 86% for Direct Yellow 106, respectively. The adsorption isotherms fitted the Freundlich’s model, the adsorption kinetics followed the pseudo-second order model and experimental data indicated an exothermic adsorption process. Moreover, the dyes desorption experiments from the alginate-chitosan beads demonstrated that about 50% of dyes were released in distilled water at high temperature (368 K) and the colored solutions obtained were so reused in dyeing tests. The results demonstrated that the alginate-chitosan beads are very efficient systems able not only to remove dyes from wastewater, but also to recycle and reuse them in further dyeing processes.

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Cite this Article:

Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma et al."Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878),vol 2, no. 4, 2017, pp.1835-1850 AI Publications doi:10.22161/ijeab/2.4.48

Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma, P.(2017).Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4), 1835-1850.10.22161/ijeab/2.4.48

Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma, P.(2017).Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4), pp.1835-1850.

Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma. 2017."Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4):1835-1850.Doi:10.22161/ijeab/2.4.48

Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma."Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads", International Journal of Environment Agriculture and Biotechnology,vol.2,no. 4, pp.1835-1850,2017.

@article { paolasemeraro2017removal,
title={Removal from wastewater and recycling of azo textile dyes by alginate-chitosan beads},
author={Paola Semeraro, Paola Fini, Marinella D’Addabbo, Vito Rizzi, Pinalysa Cosma , R},
journal={International Journal of Environment Agriculture and Biotechnology},
volume={2},
year= {2017} ,
}