A kind of liquid cathode and its application

Abstract

The invention discloses a liquid cathode, which is composed of a hydrophobic functionalized ionic liquid, a conductive electrode and a hydrophilic PVC solid support film. The hydrophobic functionalized ionic liquid is filled in a bag made of the hydrophilic PVC solid support film Then, the conductive electrode is placed in it to make a liquid cathode; the electrode preparation method is simple, the electrode specific surface area is large, the capacitance is large, and the physical adsorption, chemical adsorption, and electrosorption are organically coupled, which is not only suitable for high-concentration heavy metal wastewater. It is also suitable for the advanced treatment of several ppm low-concentration heavy metal ion wastewater in water; it solves the problems of low current density, inability to efficiently transfer mass, low electrolysis efficiency and high power consumption when conventional electrodes electrolyze low-concentration heavy metal wastewater.

Description

technical field

[0001] The invention relates to the technical field of water treatment, in particular to a liquid cathode and its application. Background technique

[0002] With the rapid development of global industrialization, the discharge of wastewater containing heavy metal ions is also increasing day by day. Their discharge leads to water cycle pollution, water quality deterioration, insufficient drinking water supply and complicated drinking water pretreatment. Water heavy metal pollution has become a threat to human beings. major environmental issues for development.

[0003] The traditional methods for removing heavy metal ions from wastewater include: adsorption method, membrane separation method, chemical precipitation method, air flotation method, flocculation sedimentation method, ion exchange method, etc. These traditional methods are expensive to deal with heavy metals and are likely to cause secondary pollution . At present, the electrolysis method has been...