▎ 摘　　要

NOVELTY - Enhancing electric field to selectively adsorbing lead ions in heavy metal wastewater comprises (i) using tannic acid@graphene oxide conductive aerogel as working electrode, silver/silver chloride as reference electrode, using the platinum meshes as counter electrode to form a three-electrode system with sodium nitrate aqueous solution as electrolyte solution, using the current-time method for electroreduction to obtain tannic acid@reduced graphene oxide conductive aerogel and the concentration of the sodium nitrate aqueous solution is 0.5-0.6 mol/l, and (ii) using the tannic acid @reduced graphene oxide conductive aerogel prepared in resultant step as working electrode, using Ag/AgCl as reference electrode and platinum meshes as counter electrode to form a three-electrode system, using lead ion-containing heavy metal wastewater as electrolyte solution and performing electrochemical adsorption using current-time method. USE - The method is useful for enhancing electric field to selectively adsorbing lead ions in heavy metal wastewater. ADVANTAGE - The method: has excellent conductivity and selectivity to lead ions. DETAILED DESCRIPTION - Enhancing electric field to selectively adsorbing lead ions in heavy metal wastewater comprises (i) using tannic acid@graphene oxide conductive aerogel as working electrode, silver/silver chloride as reference electrode, using the platinum meshes as counter electrode to form a three-electrode system with sodium nitrate aqueous solution as electrolyte solution, using the current-time method for electroreduction, where the applied voltage is -1 .2to-2V, and the reduction time is 2-30 minutes to obtain tannic acid@reduced graphene oxide conductive aerogel and the concentration of the sodium nitrate aqueous solution is 0.5-0.6 mol/l, and (ii) using the tannic acid @reduced graphene oxide conductive aerogel prepared in resultant step as working electrode, using Ag/AgCl as reference electrode and platinum meshes as counter electrode to form a three-electrode system, using lead ion-containing heavy metal wastewater as electrolyte solution and performing electrochemical adsorption using current-time method, where the voltage is -0.1to -0.2 V, and the adsorption time is 2-2.5 hours, and recovering the lead on the working electrode.