Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 30, Pages 37938-37945Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-09924-5
Keywords
Adsorption; Real effluent; Fixed bed; Chitosan; Food dye; Sand
Categories
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)/Brazil [001]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)/Brazil
- Secretaria de Desenvolvimento, Ciencia e Tecnologia/RS/Brazil [DCIT 70/2015, DCIT 77/2016]
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Adsorption of tartrazine yellow food dye, in a fixed-bed column, was carried out using a single system, a binary system (in the presence of sunset yellow food dye), and in a real effluent provides from an ice cream industry. Chitosan was used to coat sand particles by the dip-coating technique, and these particles were applied in fixed-bed adsorption. The assays were performed in flow rates of 3 mL min(-1)and 5 mL min(-1). The best performance was reached at 3 mL min(-1). In this flow rate, for single and binary systems, the breakthrough time was 95 min and 65 min, and the maximum capacity of the column was around 595 mg g(-1)and 497 mg g(-1), respectively. In the assay conducted with the real effluent, the breakthrough time was 10 min, and the maximum adsorption capacity of the column was reduced to 191 mg g(-1)for tartrazine dye. The dynamic models of Thomas and Yoon-Nelson were used, and both were suitable to represent the breakthrough curves.
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