Optimization and Performance Evaluation of Polymer Inclusion Membrane (PIM) Containing 10% Eugenol-Diallyl Phthalate Copolymer as Carrier for Malachite Green (MG) Transport

Malachite green (MG) is a compound commonly used as a dye for silk, leather, wool, cotton, and paper. It is also dangerous for the environment. This study explores the transport of MG using the copolymer (eugenol diallyl phthalate) 10% with the polymer inclusion membrane (PIM) method. The PIM was prepared by dissolving the carrier copolyeugenol diallyl phthalate 10%, polyvinyl chloride (PVC), and dibenzyl ether (DBE) in tetrahydrofuran (THF). This research investigated pH variations in the source phase, HNO3 concentration in the receiving phase, membrane thickness, carrier concentration, transport duration, and a competition study of MG transport in synthetic wastewater. The concentration of MG after transport was measured using UV-vis spectrophotometry at a wavelength of 614 nm. The results showed that the PIM with 10% copolyeugenol diallyl phthalate effectively transported MG with an efficiency of 88.28% under optimal conditions: a source phase pH of 9, an HNO3 concentration of 0.75 M, a PIM thickness at T54, and a transport duration of 12 h. The membrane lifetime reached up to 69 days, particularly when NaNO3 salt was added to the source phase.