Characterization of a supported ionic liquid membrane used for the removal of cyanide from wastewater
| Autor: | Guo Ping Li, Ni Na Liu, Long Tao Dang, Juan Qin Xue |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Cyanide Inorganic chemistry Synthetic membrane Ionic Liquids 02 engineering and technology Wastewater 010402 general chemistry 01 natural sciences Contact angle chemistry.chemical_compound Hexafluorophosphate Water Science and Technology Cyanides Imidazoles Membranes Artificial 021001 nanoscience & nanotechnology Polyvinylidene fluoride 0104 chemical sciences Membrane chemistry Ionic liquid Wetting 0210 nano-technology Hydrophobic and Hydrophilic Interactions Water Pollutants Chemical |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 76(11-12) |
| ISSN: | 0273-1223 |
| Popis: | This work evaluated the performance of ionic liquids (ILs) in supported liquid membranes in the removal of total cyanide from wastewater. Membranes were characterized by scanning electron microscopy and contact angle measurements to study the membrane morphology and wetting ability. In particular, the effects of operational parameters such as membrane immersion time, feed-phase concentration, and pH on cyanide removal were investigated. ILs are organic salts that are entirely composed of organic cations and either organic or inorganic anions. Since their vapor pressure is negligible, they can be handled easily; this characteristic gives rise to their ‘green’ nature. In this study, a hydrophobic IL, 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF6), was immobilized in the pores of a solid polymeric support made of polyvinylidene fluoride. The optimal conditions were as follows: 1 hour membrane immersion time, 312.24 mg/L feed-phase concentration, a feed-phase pH of 4, 3% NaOH solution, and 1 hour stirring time. The cyanide removal was 95.31%. The treatment of cyanide using supported ionic liquid membrane (SILM) technology is a method with potential applications in industry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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