Study of Fouling Characteristics on Reverse Osmosis Membrane During Treatment of Diclofenac in Synthetic Water

EasyChair Preprint 9591

Abstract

This research studied the rejection efficiency and flux decline in treatment of diclofenac containing in synthetic water using reverse osmosis membranes. Factors affecting rejection efficiency and flux decline, including transmembrane pressure, pH, and initial concentration, were investigated the results showed that at transmembrane pressures of 40 and 60 psi, the rejection efficiencies were similar, i.e., 61.90% and 60.70%, respectively.  At pH of 7 and 9, the rejection efficiencies were 61.92% and 63.07%, respectively, higher than that at pH of 3 (55.96%). An increase of initial concentration led to the decrease of rejection efficiency. At optimum condition, i.e., transmembrane pressure of 40 psi, pH of 7, and initial concentration of 1 mg/L, the rejection efficiency was found to be up to 98.86%.  Major contribution of rejection mechanisms were size exclusion and electrostatic repulsion effects. Characteristics of membrane fouling were studied by using resistance-in-series model. It was found that the main resistance causing flux decline was the resistance from concentration polarization (R_CP) caused by an accumulation of rejected materials nearby membrane surface.

Keyphrases: Diclofenac, Flux decline, Fouling, reverse osmosis

@booklet{EasyChair:9591,
  author    = {Issaree Sonthiratana and Chalor Jarusutthirak and Pawee Klongvessa},
  title     = {Study of Fouling Characteristics on Reverse Osmosis Membrane During Treatment of Diclofenac in Synthetic Water},
  howpublished = {EasyChair Preprint 9591},
  year      = {EasyChair, 2023}}