The study of adsorption characteristics of electrospun polymer nanofibers for benzenes in water

摘要

The adsorption properties of benzene, p-dichlorobenzene and nitrobenzene on polymer nanofibersnwere studied. Compared with polyacrylonitrile nanofiber, polystyrene (PS) nanofiber presented betternadsorption performance. Langmuir and Freundlich adsorption models were used for thenmathematical description of adsorption equilibria, and Freundlich isotherms fitted better. Kineticnstudies showed that the adsorption of PS nanofiber followed pseudo first-order model. Variousnthermodynamic parameters such as standard free energy (Δ ), enthalpy (Δ ) and entropy (Δ )werencalculated for predicting the adsorption nature of PS nanofiber for three benzenes, which indicatednthat the adsorption was spontaneous and a physical process. The regeneration efficiency maintainsnover 80% after five cycles of adsorption/desorption tests. It showed that PS nanofibers are promisingncandidates for adsorption and removal of aromatic hydrocarbons from water.