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

WATER RESEARCH

卷:113

Article

Cheng, Xiaoxiang¹  Liang, Heng¹  Ding, An¹  Tang, Xiaobin¹  Liu, Bin¹  Zhu, Xuewu¹  Gan, Zhendong¹  Wu, Daoji²  Li, Guibai¹ 

[1] Harbin Inst Technol, SKLUWRE, 73 Huanghe Rd, Harbin 150090, Peoples R China

[2] Shandong Jianzhu Univ, Sch Municipal & Environm Engn, 1000 Fengming Rd, Jinan 250101, Licheng, Peoples R China

关键词: Ferrous iron/peroxymonosulfate (Fe(II)/PMS);    Ceramic ultrafiltration (UF) membrane;    Natural organic matter (NOM);    Membrane fouling;    Atrazine (ATZ);   

DOI  :  10.1016/j.watres.2017.01.055

来源: Elsevier

【 摘 要 】

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 M), 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 RM). 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 UV254, 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. (C) 2017 Elsevier Ltd. All rights reserved.

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