Method for removing heavy metal ions in industrial wastewater by utilizing electric drive and modified membrane

• Main Authors: YUAN WENJING, SHI SHAOYUAN, JU PEIHAI, CHEN DONGDONG
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method for removing heavy metal ions in industrial wastewater by utilizing electric drive and a modified membrane, which comprises the following steps: applying an electric field to the industrial wastewater to directionally migrate the heavy metal ions to the surface of the modified membrane, and selectively adsorbing the heavy metal ions under the interception action of the modified membrane to enrich the heavy metal ions on a modified membrane-solution interface; applying a reverse electric field to the industrial wastewater to decomplex and desorb the heavy metal ions enriched on the surface of the modified membrane, and regenerating the modified membrane; and adding a precipitator and desorbed heavy metal ions for precipitation, solidification and removal. According to the method, a new process of combining a modified membrane loaded with functional groups on the surface, electric driving and regeneration by utilizing an electric field is adopted, so that the heavy metal ions are