摘要
采用机械掺杂法制备了聚苯胺/聚苯乙烯(PANI/PS)共混物,并用红外光谱表征了复合材料的目标结构。研究了pH、Pb^(2+)初始浓度以及吸附时间、温度对PANI/PS复合材料吸附Pb^(2+)的性能影响,并拟合了Pb^(2+)吸附过程的动力学模型和等温模型。结果表明:pH为4.5时,PANI/PS复合材料对Pb^(2+)的吸附容量最大,所需吸附平衡时间为50 min。PANI/PS复合材料对Pb^(2+)的吸附容量随着Pb^(2+)初始浓度的增大而增大,当Pb^(2+)浓度大于300 mg/L时,对Pb^(2+)的吸附容量变化速率放缓。PANI/PS复合材料对Pb^(2+)的吸附过程遵循Langmuir等温模型与准二级动力学方程,在15~50℃为自发吸附过程。
Polyaniline/polystyrene blend was prepared by mechanical doping method, and the target structure of the composite was characterized by infrared spectroscopy. The effects of p H, initial concentration of Pb^(2+), adsorption time and temperature on the Pb^(2+)adsorption performance of PANI/PS composites were studied experimentally, and the kinetic model and isothermal model of the Pb^(2+)adsorption process were fitted. The experimental results show that the adsorption capacity of PANI/PS composites for Pb^(2+)is the highest when the pH is 4.5, and the adsorption equilibrium time is 50 min.The adsorption capacity of PANI/PS composites for Pb^(2+)increases with the increase of the initial concentration of Pb^(2+).When the concentration of Pb^(2+)is greater than 300 mg/L, the change rate of adsorption capacity for Pb^(2+)slow down. The adsorption process of Pb^(2+)by PANI/PS composites follows the Langmuir isothermal model and the quasi-second-order kinetic equation, and the spontaneous adsorption process occurs at 15~50 ℃.
作者
侯芳
郑伟
HOU Fang;ZHENG Wei(Jiyuan Vocational and Technical College,Jiyuan 459000,China)
出处
《塑料科技》
CAS
北大核心
2021年第5期48-52,共5页
Plastics Science and Technology
基金
河南省高等学校重点科研资助项目(16B150008)。
