Ferrous iron/peroxymonosulfate oxidation as a pretreatment for ceramic ultrafiltration membrane: Control of natural organic matter fouling and degradation of atrazine

Abstract

Ferrous iron/peroxymonosulfate (Fe(II)/PMS) oxidation was employed as a pretreatment method for ultrafiltration process to control membrane fouling caused by natural organic matter, including humic acid (HA), sodium alginate (SA), bovine serum albumin (BSA), and their mixture (HA-SA-BSA). To evaluate the mechanism of fouling mitigation, the effects of Fe(II)/PMS pretreatment on the characteristics of feed water were examined. The degradation of atrazine (ATZ) was also investigated and the species of generated radicals were preliminarily determined. Under the test exposure (15 and 50 μM), Fe(II)/PMS pretreatment effectively mitigated membrane fouling caused by HA, SA and HA-SA-BSA mixture, and the performance improved with the increase of Fe(II) or PMS dose; whereas aggravated BSA fouling at lower doses and fouling alleviation was observed only at a higher dose (50/50 μΜ). The fouling mitigation was mainly attributed to the effective reduction of organic loadings by coagulation with in-situ formed Fe(III). Its performance was comparable or even slightly higher than single coagulation with Fe(III), most likely due to the oxidation by Fe(II)/PMS process. Fe(II)/PMS oxidation showed better performance in reducing DOC and UV, fluorescence intensities of fluorescent components and UV-absorbing compounds than single coagulation. In addition, Fe(II)/PMS pretreatment was efficient in ATZ degradation due to the generation of sulfate and hydroxyl radicals, whereas coagulation was ineffective to remove it.

Enhanced permeation performance with incorporation of silver nitrate onto polymeric membrane

“…In water treatment technology, membrane separation received significant advancement in this recent years and mainly subjected to its ability to remove microbes, particles and even reducing water with high heavy metal [16]. Beside, membrane filtration has also been applied in the field of food processing [17][18][19][20][21], downstream process especially for biotechnology industry [22][23][24][25], seawater treatment or desalination process [24,[26][27][28][29][30] and many other type of separations [17,[31][32][33][34]. The main reason of choosing membrane as part of the process were usually ease of operation, minimum waste generation and relatively low power needs [35].…”

Assessment of Sulfate Radical-Based Advanced Oxidation Processes for Water and Wastewater Treatment: A Review

“…There are not still many reports involving fouling mitigation with SR-AOPs, but those that exist have yielded good results. For example, Fe 2+ /PMS treatment have proved to significantly mitigate fouling caused by NOM, obtaining a fouling control performance slightly higher than single coagulation with the same iron dose [129]. Moreover, in another study, pretreatments with Fe 2+ /PMS significantly increased the efficiency by 12-76% and showed the best performance for the reduction of both reversible and irreversible fouling in comparison with coagulation and ozonation [130].…”

“…Finally, Cheng et al have compared Fe 2+ /PMS, UV/PMS, and UV/Fe 2+ /PMS pretreatments and has determined that the removal performance showed an apparent regularity of UV/Fe 2+ /PMS > Fe 2+ /PMS > UV/PMS [129]. Moreover, while Fe 2+ /PMS pretreatment mitigated both reversible and irreversible membrane fouling, UV/PMS only reduced reversible fouling [127,129].…”

Degradation of atrazine in aqueous solution through peroxymonosulfate activated by Co‐modified nano‐titanium dioxide

“…In particular, ATZ has been RESEARCH ARTICLE detected in surface water samples (0.43 μg/L), which was far above the recommended level of European Union (0.10 μg/L; Ines Bonansea et al, 2013). However, effective degradation of ATZ can hardly be achieved by adsorption (Wu et al, 2017), coagulation (Cheng et al, 2017), and biodegradation (Lai et al, 2020;Yan et al, 2017). Although ATZ had been forbidden to use in most of European countries, its application in some countries such as USA and China is still widespread (Ji, Zhang, Wei, Zhang, & Lai, 2019;Khan et al, 2014).…”