Method for removing cyanides in cyaniding wastewater by use of emulsion liquid membrane technology

The invention discloses a method for removing cyanides in cyaniding wastewater by use of an emulsion liquid membrane technology, which comprises the steps of dissolving a surfactant into a membrane solvent, and adding a carrier, a membrane auxiliary and sodium hydroxide internal-phase liquid; mixing, and preparing a white water-in-oil type emulsion liquid membrane by an emulsion maker; performing a mixing reaction between the emulsion liquid membrane and the cyaniding wastewater; then demulsifying, and enriching and recycling the cyanides. By imitating the characteristic of active transmission of a biological membrane, the method disclosed by the invention has the characteristics of good selectivity, high separation efficiency, great enrichment multiple, low energy consumption, simplicity in operation and short treatment period; the cyanides can be recycled, and engineering application is easy to implement; moreover, due to the advantage of repeated utilization of the membrane, the removal rate can exceed 95%