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...

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Bibliographic Details
Published in:Chemical engineering & technology 2012-02, Vol.35 (2), p.341-346
Main Authors: Hu, Y., Zhang, N., Qu, C.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Emulsion liquid membrane
Exact sciences and technology
General purification processes
Hydrogen sulfide
Pollution
Wastewater
Wastewaters
Water treatment and pollution
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Summary: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 L–1 solution. Obviously, the salinity of the external phase has a negligible effect on the separation of H2S using ELMs. A new method for separation of hydrogen sulfide (H2S) from highly saline wastewaters originating from an oil‐gas field by emulsion liquid membranes (ELMs) is presented. The ELM technique offers the advantages of high diffusion rate, large mass transfer area, separation and stripping in one system, wide adaptability, and high separation efficiency.
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.201100283