PMO synthesized and functionalized by p-phenylenediamine as new nanofiller in PES-nanofiltration membrane matrix for efficient treatment of organic dye, heavy metal, and salts from wastewater. (January 2021)

• Record Type: Journal Article
• Authors: Mehrjo, Farzad; Pourkhabbaz, Alireza; Shahbazi, Afsaneh
• Is Part Of: Chemosphere. Volume 263(2021)
• Publication Date: 2021-01
• Subjects: Nanofiltration membrane -- PMO-PPD nanofiller -- Anti-fouling -- Pollutant removal; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2020.128088
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Highly ordered periodic mesoporous organosilica (PMO) with large-pores (9.3 nm) synthesized using novel and cost-effective route. The synthesized PMO was then functionalized by p-phenylenediamine (PPD) and incorporated in polyethersulfone (PES) nanofiltration membrane‌ with various dosage using phase inversion method. The prepared membranes were characterized with FT-IR/ATR, FE-SEM and EDX techniques. The overall porosity, the mean of pore radius, water contact angle, fouling, permeation, and rejection were computed. As a result, the hydrophilicity and the pure water flux of membranes were significantly enhanced after modification with PMO-PPD due to its high hydrophilic nature as nanofiller. Ultimately, the modified membrane with 0.25 wt% of PPD was found the ideal membrane with water contact angle of 54.2%, pure water flux of 33.7 L/m 2 h, porosity of 74.1%, and mean pore radius of 4.96 nm. This membrane showed the maximum increase in water flux and superlative anti-fouling growth when compared to the other studied membranes. Moreover, among modified membranes with various quantity of PPD, the performance of the PES-PMO-PPD 0.25 wt% was the best for rejection of MO dye (96.7%), Pb(II) (93.1%), Na2 SO4 (73.0%), MgSO4 (41.6%), and NaCl (33.7%). Graphical abstract: Image 1 Highlights: Very large-pore periodic PMO was synthesized using novel and cost-effective process. Modified PMO by p-phenylenediamine was incorporated in PES nanofiltration membrane‌. PES-PMO-PPD 0.25 wt% showed maximum increase in water flux and superlative anti-fouling growth among fabricated membranes. PES-PMO-PPD 0.25 wt% revealed high efficiency for rejection of pollutants.