Removal of-Copper Ions-from Aqueous Solution Using Liquid-Surfactant-Membrane Technique

Abstract

Extraction of copper (Cu) from aqueous solution utilizing Liquid Membrane technology (LM) is more effective than precipitation method that forms sludge and must be disposed of in landfills. In this work, we have formulated a liquid surfactant membrane (LSM) that uses kerosene oil as the main diluent of LSM to remove copper ions from the aqueous waste solution through di- (2-ethylhexyl) phosphoric acid - D2EHPA- as a carrier. This technique displays several advantages including one-stage extraction and stripping process, simple operation, low energy requirement, and. In this study, the LSM process was used to transport Cu (II) ions from the feed phase to the stripping phase, which was prepared, using H2SO4. For LSM process, various parameters have been studied such as carrier concentration; treat ratio (TR), agitating speed and initial feed concentration. After finding the optimum parameters, it was possible to extract Cu up to 95% from the aqueous feed phase in a single stage extraction.

Performance Evaluation of Emulsion Liquid Membrane on Chlorpyrifos Pesticide Removal: Stability, Mass Transfer Coefficient, and Extraction Efficiency Studies

“…When increasing mixing time, CP extraction and stripping efficiency keep increasing, reaching an optimal level at 10min of 93.8% and 94.7%, respectively, while the breakage percentage is reduced to a minimum of 0.73%. Longer contact time would cause the internal phase solution to move toward the feed solution due to the increased emulsion breakage [33,34]. Therefore, the molecules revert backward to the feed phase, decreasing extraction and stripping efficiencies.…”

Emulsion Liquid Membrane for Pesticides Removal from Aqueous Solution: Emulsion Stability, Extraction Efficiency and Mass Transfer Studies

“…ELM are double water-in-oil-in-water emulsions (W/O/W) stabilized by employment of suitable surface-active agents. This system consists of organic solution (membrane phase), stripping solution (internal phase) and dispersed phase (external phase) [12]. ELMs are true double emulsions, an internal aqueous phase being spread as small droplets into oil phase, while the resulting emulsion is spread as large droplets into the external aqueous phase [13].…”

“…A carrier agent is utilized in various liquid membrane technologies to assist the transfer of the target species, which imposing extra cost [20]. The conventional diluents used in emulsion liquid membrane systems are primarily made up of organic solvents derived from petroleum (diluents) kerosene [12,21] hexane [22,23], heptane [24,25], which are flammable, volatile, toxic, and non-biodegradable. In addition, these materials could be extremely expensive due to restricted resources.…”

Process Optimization Study of Pb(II) Removal by Bulk Liquid Membrane (BLM)

“…Industrial wastewater always contains heavy metals like lead, nickel, cadmium etc. from anthropogenic industries, such as Petrochemicals, mining activities, batteries, pulp, paper, alloys, steel, pigment paint and fertilizer [4] [5]. Most techniques can be employed to remove toxic contaminates from synthetic wastewater such as solvent extraction, bio sorption, chemical precipitation, coagulation [5], ion-exchange, adsorption [6], Electrolysis [7], membrane filtration [8], adsorption [9,10] etc.…”