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Citation: CHEN Pei-Gen, WU Zhi-Chuan, WANG Xue-Qian, TAO Ting-Xian, ZHANG Yu-Dong, WANG Er-Lan, XIN Hou-Qun. Coordinate Reaction Kinetics of Polyvinyl Alcohol Fiber-Fe(Ⅲ)[J]. Chinese Journal of Applied Chemistry, ;2007, 24(3): 314-317. shu

Coordinate Reaction Kinetics of Polyvinyl Alcohol Fiber-Fe(Ⅲ)

1.
Anhui University of Tecnology and Science, Wuhu 241000

Corresponding author: WU Zhi-Chuan,
Received Date: 29 April 2006
Available Online: 10 September 2006
Fund Project: 安徽省高校自然科学基金资助项目(2004kj034zd,2005kj012zd) (2004kj034zd,2005kj012zd)

By the reaction of FeCl₃ with polyvinyl alcohol fiber, the complex of PVA-Fe(Ⅲ) was synthesized. The reaction kinetics was studied, and the reaction kinetics law of PVA fiber to metal ion was established. The results show that the optimum conditions of the reaction was c(Fe(Ⅲ))=0.08 mol/L, t=60℃, time=2 h and pH=2.0. It was found that the OH oxygen in PVA bonded to Fe(Ⅲ) ion and the coordinate data of PVA fiber to Fe(Ⅲ) could be well interpreted by the Langmuir isothermal adsorption model. The saturated coordinate capacity of PVA to Fe(Ⅲ) was 171.8 mg/g(dry fiber). The results show that the reaction is consistent with the first-order kinetic model. The reaction rate constant was measured by the reaction of polyvinyl alcohol fiber with FeCl₃(initial concentration 0.08 mol/L) at different temperatures and its activation energy was 144.98 kJ/mol. The reaction rate constant can be expressed as lg k=-E_a/2.303RT+20.48.
- polyvinyl alcohol fiber,
- Fe(Ⅲ),
- reaction kinetics,
- activation energy,
- reaction rate constant
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