Study on acidified carbon nanotubes modified polyacrylonitrile hollow fiber membrane

In this paper, the adsorption capacity of CNT modified polyacrylonitrile (PAN) film on copper ions under different conditions was studied by the adsorption experiment of the prepared multilayer diazo resin acidified carbon nanotubes/PAN composite film. The concentration of copper ion solution before and after adsorption was measured by inductively coupled plasma (ICP). The results show that the adsorption capacity of the pan film modified by CNT increases first and then reaches the adsorption equilibrium with the increase of the adsorption time of copper ion, and the adsorption capacity of the pan film modified by CNT increases with the increase of the initial concentration of copper ion and the external temperature With the increase of solution pH, the adsorption capacity of CNT modified polyacrylonitrile membrane to copper ion increases first and then decreases; after multiple desorption/adsorption of the modified membrane which has reached adsorption equilibrium, the membrane still has CNT adsorption capacity to copper ion, indicating that the membrane has excellent recycling performance.

Automated summary

The experimental results demonstrate that the adsorption capacity of CNT-modified PAN film for copper ions increases with adsorption time until reaching equilibrium. Furthermore, the adsorption capacity increases with initial concentration and temperature of copper ions. The adsorption capacity of the membrane for copper ions varies at different pH levels.