EFFECT OF SALT ON LIFETIME ON MEMBRANES CONTAINING CO-EDVB 8% FOR PHENOL-BASED SEPARATION SUPPORTED LIQUID MEMBRANE Agung Abadi Kiswandono1*, Anisa Rahmawati1, Rinawati1, Hardoko Insan Qudus1, Suharso1ust Try to Submit This Sample Abstract
1Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Lampung, Jl. Prof. Dr. Ir. Sumantri Brojonegoro, Bandar Lampung City, Lampung 35145, Indonesia
Abstract
The separation of phenol from wastewater requires a selective and sustainable method. One promising technology is Supported Liquid Membrane (SLM), but its application is often hampered by low stability or lifetime of the membrane due to liquid phase leakage. This stability is a key factor, as it determines the long-term effectiveness of the membrane in the phenol transport process. This study was focused on evaluating the stability of SLM membranes containing 8% copol (eugenol divinyl benzene) (Co EDVB) as a carrier, by examining the effect of the addition of various types of salts in the source phase. The membrane is prepared by immersing polytetrafluoroethylene (PTFE) into an 8% solution of Co EDVB in chloroform. The stability test was carried out by monitoring changes in the pH of the source phase during the phenol transport process, where the membrane was declared to have a leak when the pH reached approximately 9. The results of the study showed that the addition of salt was able to extend the life of the membrane compared to the condition without salt (16 days). Improvements were recorded with NaNO₃- (19 days), KNO₃- and NaCl (22 days), as well as Na₂-SO₄- providing the highest stability of up to 25 days. These findings confirm that the presence of salts in the source phase plays an important role in maintaining the stability of SLM for phenol separation.
