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- Title
Decolorization of C.I. Reactive Blue 78 dyeing wastewater in the chitosan- gelatin composite copper polymer/sodium persulfate system.
- Authors
Yuge Wang; Xueyan Wang; Jie Wang; Gege Quan
- Abstract
Chitosan-gelatin composite copper polymer (CG for short) was prepared as an adsorption catalyst. The CG was combined with sodium persulfate to construct a heterogeneous Fenton-like system, which was applied to the decolorization of C.I. Reactive Blue 78 dyeing wastewater. The effects of sodium persulfate, CG, temperature, initial dyeing wastewater pH value and additives (sodium chloride, sodium carbonate) on the decolorization were investigated. The results show that the decolorization percentage of 0.1 g/L C.I. Reactive Blue 78 dyeing wastewater can reach 93.84 % under the conditions of sodium persulfate dosage of 0.3 g/L, CG dosage of 0.8 g/L, decolorization at 40 °C for 30 min. At the same time, the catalytic system has the characteristic of good decolorization effect on C.I. Reactive Blue 78 dyeing wastewater within a wide pH values range of 3-9. Even for dyeing wastewater containing 0.4 g/L high concentration C.I. Reactive Blue 78, the decolorization percentage can reach over 90 % after decolorization at 40 °C for 2 h. Moreover, CG can be reused. After repeated use of CG four times, the decolorization percentage of C.I. Reactive Blue 78 dyeing waste remains above 90 %. In addition, the weight loss rate of CG after each decolorization is less than 12 %. However, the presence of sodium chloride and sodium carbonate in the dyeing wastewater is not conducive to the decolorization of C.I. Reactive Blue 78 by the system.
- Subjects
COPPER; SEWAGE; POLYMERS; COLOR removal (Sewage purification); SODIUM; GELATIN; NATURAL dyes &; dyeing; AZO dyes
- Publication
Desalination & Water Treatment, 2024, Vol 318, p1
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1016/j.dwt.2024.100329