Unveiling the environmental sustainability of Ti4O7 electrified membrane for perfluorooctanoic acid removal

被引:0
|
作者
Wang, Runzhi [1 ]
Zhao, Yumeng [1 ]
Dang, Xuhui [1 ]
Sun, Ye [1 ]
Kong, Dezhen [1 ]
Wang, Xiaoxiong [2 ]
Bai, Shunwen [1 ]
Arotiba, Omotayo A. [3 ,4 ]
Ma, Jun [1 ]
机构
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Tsinghua Univ, Inst Ocean Engn, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
[3] Univ Johannesburg, Dept Chem Sci, Johannesburg, South Africa
[4] Univ Johannesburg, Ctr Nanomat Sci Res, Johannesburg, South Africa
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Decentralized water treatment; Micropollutants removal; Electrocatalytic membrane; Life cycle assessment; Environmental impacts; LIFE-CYCLE ASSESSMENT; PERFLUOROALKYL SUBSTANCES; ELECTROCHEMICAL OXIDATION; WATER; ENERGY;
D O I
10.1016/j.watres.2025.123310
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Emerging electrified membrane (EM) technology offers an efficient approach for decentralized water purification. However, EM currently faces the challenge of unknown environmental sustainability, which presents a critical knowledge gap impeding its scale-up implementation. In this work, we aim to explore the environmental impacts of EM technology via a "cradle-to-grave" life cycle assessment, benchmarked against sequential ultrafiltration-nanofiltration. Our study found that the current EM technology shows higher greenhouse gas (GHG) emissions (19.70 kgCO2e g-1) than ultrafiltration-nanofiltration (8.60 kgCO2e g-1) for micropollutants removal. Electro-filtration operation dominates the total environmental impacts of EM process, driven primarily by the supporting electrolyte and electricity consumption. Notably, transitioning to greener electrolytes at lower concentrations can reduce GHG emissions by up to 66%, while switching to low-carbon-grid electricity through renewable energy sources will achieve a 33% reduction. Overall, this work enhances understanding of the environmental impacts of EM technology, emphasizing electrolyte optimization and carbon-intensity-reduction of electricity as critical factors for its sustainable development.
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页数:10
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