نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده نساجی دانشگاه یزد
2 Textile engineering department, Yazd university, safaeiah, Yazd, Iran
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Dyes are among the most widely used chemicals in textile industry which are partially discharged to the environment
after the wet processes. It is important to find environmentally friendly wastewater treatment methods to
remove these organic pollutants. In this search, the photo catalytic decolorization of C.I. Direct Red 23 (DR23)
under UV/TiO2/β-Cyclodextrin process is studied. Effective factors such as pH, the presence of salt, temperature
and concentration of the dye are evaluated. The results show that the highest efficiency of decolorization can be
achieved in acidic pH and at low DR23 concentrations. Adding sodium chloride salt (5 to 20 g/L) accelerates the
catalytic degradation and improves the adsorption of DR23. β-cyclodextrin acts as an absorbent in this process.
The results show that the DR23 decolorization under UV/TiO2/β-Cyclodextrin method also reduces the total
dissolved solids (TDS) of the wastewater. Moreover, the experimental results show a very good correlation with
the Langmuir adsorption isotherm.
کلیدواژهها [English]