Ferrate(VI)-based oxidation for ultrafiltration membrane fouling mitigation in shale gas produced water pretreatment: Role of high-valent iron intermediates and hydroxyl radicals

被引：3

作者：

Cheng, Xiaoxiang ^{[1
,3
]}

Sai, Dongshun ^{[1
]}

Luo, Xinsheng ^{[1
]}

Chang, Haiqing ^{[2
]}

Li, Peijie ^{[4
]}

Xu, Jingtao ^{[1
]}

Wu, Daoji ^{[1
,3
]}

Liang, Heng ^{[4
]}

机构：

[1] Shandong Jianzhu Univ, Sch Municipal & Environm Engn, Jinan 250101, Peoples R China

[2] Sichuan Univ, Coll Architecture & Environm, MOE Key Lab Deep Earth Sci & Engn, Chengdu 610207, Peoples R China

[3] Shandong Jianzhu Univ, Resources & Environm Innovat Inst, Jinan 250101, Peoples R China

[4] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

来源：

WATER RESEARCH | 2024年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Shale gas produced water (SGPW); Ferrate (Fe(VI)); Calcium peroxide(CaO2); Ultraviolet (UV); Membrane fouling; PROTEIN;

D O I：

10.1016/j.watres.2024.122013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ultrafiltration (UF) is increasingly used in the pretreatment of shale gas produced water (SGPW), whereas severe membrane fouling hampers its actual operation. In this work, ferrate(VI)-based oxidation was proposed for membrane fouling alleviation in SGPW pretreatment, and the activation strategies of calcium peroxide (CaO 2 ) and ultraviolet (UV) were selected for comparison. The findings indicated that UV/Fe(VI) was more effective in removing fluorescent components, and the concentration of dissolved organic carbon was reduced by 24.1 %. With pretreatments of CaO 2 /Fe(VI) and UV/Fe(VI), the terminal specific membrane flux was elevated from 0.196 to 0.385 and 0.512, and the total fouling resistance diminished by 52.7 % and 76.2 %, respectively. Interfacial free energy analysis indicated that the repulsive interactions between pollutants and membrane were notably enhanced by Fe(VI)-based oxidation, thereby delaying the deposition of cake layers on the membrane surface. Quenching and probe experiments revealed that high-valent iron intermediates (Fe(IV)/Fe(V)) played significant roles in both CaO 2 /Fe(VI) and UV/Fe(VI) processes. Besides, hydroxyl radicals ( center dot OH) were also important reactive species in the UV/Fe(VI) treatment, and the synergistic effect of Fe(IV)/Fe(V) and center dot OH showed a positive influence on SGPW fouling mitigation. In general, these findings establish a theoretical underpinning for the application of Fe(VI)-based oxidation for UF membrane fouling mitigation in SGPW pretreatment.

引用

页数：13