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Recent progress in ionic liquid-based green emulsion liquid membranes for separation of industrial discharges

2024; Elsevier BV; Volume: 496; Linguagem: Inglês

10.1016/j.cej.2024.154309

1873-3212

Huma Warsi Khan, A. Vijaya Bhaskar Reddy, Berihun Mamo Negash, Muhammad Moniruzzaman, Tejraj M. Aminabhavi,

Advanced Battery Materials and Technologies

Emulsion liquid membranes (ELMs) are essential for effective separation and recovery of effluents in various industrial sectors. They allow target components to be transported selectively, reducing their adverse effects on ecosystem and optimizing the use of resources. The instability of ELM is a significant barrier to its widespread industrial adoption for the separation and recovery of solutes from various industrial effluents. The unstable ELMs supplicate the membranes to rupture, decreasing efficiency throughout the extraction process and lowering the target solute recovery. As a result, maintaining ELM stability is critical to ensure optimal extraction performance and maximum solute recovery. Generally, an external agent termed 'carrier' has been introduced to enhance the stability of ELMs by reducing their breakage. Recently, ionic liquids (ILs) have surfaced as highly promising substitutes to conventional solvents as carriers and stabilizers that can enhance the stability of ELMs. This review presents an overview of current technological advances using ILs as carriers and stabilizers in ELMs. Further, parameters that affect the stability and performance of IL-ELMs are discussed and provides valuable insights on the use of COSMO-RS (Conductor-like Screening Model for Real Solvents) tool for the selection of effective anion cation combinations from a large number of available ILs. This review could serve as a potential indicator for developing advanced ELMs to separate and recover solutes from the industrial effluents. The advancement of ELM technology and its broader applications, particularly sustainable and efficient pollutant removal and resource recovery are elegantly discussed.