Catalytic membrane with dual-layer structure for ultrafast degradation of emerging contaminants in surface water treatment

被引:0
|
作者
Gao, Qieyuan [1 ,2 ,3 ]
Jin, Xinyao [1 ]
Zhang, Xi [4 ]
Li, Junwei [2 ]
Liu, Peng [1 ]
Li, Peijie [1 ]
Luo, Xinsheng [5 ]
Gong, Weijia [6 ]
Xu, Daliang [1 ]
Dewil, Raf [4 ]
Liang, Heng [1 ]
van der Bruggen, Bart [2 ]
机构
[1] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Katholieke Univ Leuven, Dept Chem Engn, Celestijnenlaan 200F, B-3001 Leuven, Belgium
[3] China Univ Min & Technol, State Key Lab Coking Coal Resources Green Exploita, Xuzhou 221116, Jiangsu, Peoples R China
[4] Katholieke Univ Leuven, Dept Chem Engn, Proc & Environm Technol Lab, J De Nayerlaan 5, B-2860 St Katelijne Waver, Belgium
[5] Shandong Jianzhu Univ, Sch Municipal & Environm Engn, Jinan 250101, Peoples R China
[6] Northeast Agr Univ, Sch Engn, 600 Changjiang St, Harbin 150030, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Co-casting; Dual-layer membrane; Catalytic oxidation; Peracetic acid; Nano-confinement effect;
D O I
10.1016/j.jhazmat.2024.136333
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The catalytic membrane-based oxidation-filtration process integrates physical separation and chemical oxidation, offering a highly efficient water purification strategy. However, the oxidation-filtration process is limited in practical applications due to the short residence time of milliseconds within the catalytic layer and the interference of coexisting organic pollutants in real water. Herein, a dual-layer membrane containing a top selective layer and a bottom catalytic layer was fabricated using an in situ co-casting method with a double-blade knife. Experimental results demonstrated that the selective layer rejected macromolecular organic pollutants, thereby alleviating their interference with bisphenol A (BPA) degradation. Concurrently, the catalytic layer activated peracetic acid oxidant and achieved a high BPA degradation exceeding 90 % in milliseconds with reactive oxygen species (especially center dot OH). The finite-element analysis confirmed a high-concentration reaction field occupying the pore cavity of the catalytic layer, enhancing collision probability between reactive oxygen species and BPA, i.e., the nano-confinement effect. Additionally, the dual-layer membrane achieved a long-term stable performance for emerging contaminant degradation in surface water treatment. This work underscores a novel catalytic membrane structure design for high-performance oxidation-filtration processes and elucidates its mechanisms underlying ultrafast degradation.
引用
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页数:11
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