Adsorption thermodynamics and kinetics of disperse dye on poly(p-phenylene benzobisoxazole) fiber pretreated with polyphosphoric acid

作者：Guan Yu; Mao Ya hong; Wei Dong; Wang Xiu xing; Zhu Pu xin^*

来源：Korean Journal of Chemical Engineering, 2013, 30(9): 1810-1818.

DOI：10.1007/s11814-013-0103-y

• PBO Fiber
• Adsorption
• Diffusion
• Thermodynamics
• Kinetics
• Disperse Dye

Adsorption thermodynamic and kinetic studies of C. I. disperse dye 60 on PBO fiber pretreated with polyphosphoric acid (PPA) were carried out under the conditions of pH 6.0 +/- 0.2, initial dye concentration 0.05-1.0 g/L and liquor ratio 2,000: 1. The results showed that the equilibrium adsorption isotherm of the disperse dye on the pretreated PBO fiber was a Langmuir-Nernst mixed Model and the saturated adsorption capacity of the turning point was 1.046 mg/g. The thermodynamic parameters were calculated by the equilibrium adsorption isotherm, such as standard affinity, enthalpy change and entropy change, which indicated that the adsorption of disperse dye on the pretreated PBO fiber was an exothermic process. Based on the thermodynamic and kinetic data, the adsorption of the dye on the pretreated PBO fiber was a kinetics controlled process, and the disperse dye could only diffuse into the surface layer of pretreated PBO fiber. Meanwhile, the adsorption kinetics of disperse dye on pretreated PBO fiber well agreed with a pseudo-first-order kinetic model.

• 出版日期2013-9
• 单位四川大学; 中国人民解放军62023部队