Abstract:

In order to solve the problem on the pollution of beavy metal ions to the environment, poly(vinyl alcohol-co-ethylene)  (PVA-co-PE) modified nanofiber membrane was prepared for the adsorption of heavy metal ions. The infouences of initial metal concentration, adsorption time and pH on the metal adsorption capacity were discussed. The results show that the adsorption rate of Hg 2+ of the nanofiber membrane modified by rhodamine meets the pseudo-second order equation, namely the chemical adsorption. And the adsorption isotherm belongs to Langmuir isotherm model. The maximum removal capacity for Hg2+ reaches 17.26mg/g when pH=3. Besides，the modified membrane has certain recyclability. Furthermore, it exhibits peomising antimicrobial properties and is capable of removing the heavy metal mixture (Hg2+ and Pb2+), providing an effective method for the treatment of heavy metal-polluted wastewater.

Key words: rhodanine, poly (vinyl alcohol-co-ethylene) nanofiber membrane, heavy metal adsorption, antimicrobial agent