Separation of Hydrogen Sulfide from Wastewater by Emulsion Liquid Membranes

Hydrogen sulfide was separated from highly saline wastewater by emulsion liquid membranes (ELMs). Such membranes consist of polyalkenyl succinimide as emulsifying agent, diethanolamine as carrier, kerosene as membrane, and sodium hydroxide as stripping solution. The effect of four surfactants on the stability of ELMs was investigated and every operational parameter was tested. The highest achievable separation efficiency was 99.73?% for a 100?mg?L1 solution. Obviously, the salinity of the external phase has a negligible effect on the separation of H2S using ELMs.