Impacts of sodium hydroxide and sodium hypochlorite aging on polyvinylidene fluoride membranes fabricated with different methods

Effects of Hydrogen Peroxide and Sodium Hypochlorite Aging on Properties and Performance of Polyethersulfone Ultrafiltration Membrane

“…The main purpose of this study was to comprehensively investigate degradation of PES membrane caused by H 2 O 2 aging, with NaClO aging examined as comparison. PES membrane was soaked in H 2 O 2 and NaClO solutions with a concentration of 5000 mg/L to accelerate membrane aging, and an exposure dose of 500 g·h/L was selected based on chemical cleaning parameters and frequency generally applied in water and wastewater treatment [6,25]. Membrane permeability, fouling propensity, and retention ability of membranes were examined to evaluate membrane degradation in macroscopic scale.…”

Antibiofouling Thin‐Film Nanocomposite Membranes for Sustainable Water Purification

“…antiscalants, or dispersants to loosen and remove the layer deposited on the membrane surfaces. The commonly used cleaning chemicals include sodium hydroxide, [21] sodium hypochlorite, ethylenediamine tetraacetic acid, [22] hydrogen chloride, and chlorine, which are selected depending according to the type of contaminant present on the membrane surface. Furthermore, the susceptibility of the membrane material to damage from chemicals must also be considered.…”

Effect of concentration on virus removal for ultrafiltration membrane in drinking water production

“…Chlorine exposure effects have been largely studied with regards to membrane degradation, structure and filtrations characteristics. Pore size increase [29][30][31][32], change of surface hydrophobicity [29,33,34] and/or rugosity [29,35] for example, have been explained by degradation of membrane materials after chlorination. Most of the degradations have been attributed on membrane additives, such as PVP [36][37][38].…”

“…Retention evolution with membrane ageing has already been assessed according to various compounds. Studies about organic compounds [37], E.coli and total bacteria [33,40], and bovine serum albumin (BSA) [30,34,35] retentions after chlorine exposure have given different results. Moreover, Ravereau et al observed MS2 retention and showed an increasing retention on aged membranes [40], when other studies at industrial scale observed a loss of 1 log in MS2 phage retention for 6 years-old membranes [19,25].…”