School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil.
Environ Sci Pollut Res Int. 2020 Oct;27(30):37938-37945. doi: 10.1007/s11356-020-09924-5. Epub 2020 Jul 2.
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 and 5 mL min. The best performance was reached at 3 mL min. 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 and 497 mg g, 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 for tartrazine dye. The dynamic models of Thomas and Yoon-Nelson were used, and both were suitable to represent the breakthrough curves.
使用单体系、双体系（存在日落黄食用色素时）和冰淇淋工业实际废水，在固定床柱中进行了酒石黄食用色素的吸附研究。壳聚糖通过浸涂技术涂覆在沙粒上，这些颗粒应用于固定床吸附。在 3 和 5 mL/min 的流速下进行了实验。最佳性能在 3 mL/min 时达到。在该流速下，对于单体系和双体系，穿透时间分别为 95 和 65 分钟，柱的最大容量分别约为 595 和 497 mg/g。在实际废水的实验中，穿透时间为 10 分钟，柱的最大吸附容量降低到 191 mg/g 用于酒石黄染料。使用了 Thomas 和 Yoon-Nelson 动力学模型，它们都适合表示穿透曲线。
