Optimization of cyanide extraction from wastewater using emulsion liquid membrane system by response surface
Juan Qin Xue1, Ni Na Liu1, Guo Ping Li1
1School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
Summary
This study demonstrates effective cyanide wastewater treatment using emulsion liquid membranes (ELM). Optimized conditions achieved over 95% cyanide removal, offering an industrial solution.
Area of Science:
- Environmental Chemistry
- Chemical Engineering
Background:
- Cyanide wastewater poses significant disposal challenges.
- Effective treatment methods are crucial for industrial applications.
Purpose of the Study:
- To investigate the removal of cyanide from wastewater using emulsion liquid membranes (ELM).
- To optimize ELM parameters for efficient cyanide removal.
Main Methods:
- Emulsion liquid membrane (ELM) technology was employed for cyanide removal.
- Key parameters studied included surfactant (Span-80), carrier (trioctylamine, TOA), stripping agent (NaOH), and phase volume ratio.
- Response surface methodology (RSM) was used for optimization.
Main Results:
- Optimal conditions determined: 4% Span-80, 4% TOA, 1% NaOH, and a 1:7 emulsion-to-external-phase volume ratio.
- Achieved 95.07% total cyanide removal under optimal conditions.
- RSM predictions closely matched experimental results.
Conclusions:
- Emulsion liquid membrane (ELM) is a highly effective technique for cyanide wastewater treatment.
- The optimized ELM process shows significant potential for industrial implementation.
- This method offers a viable solution for managing cyanide-contaminated industrial effluents.
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