Chen Min, Jiang Jun, Guan Weixin, Zhang Zhijian, Zhang Xin, Shi Wenxiong, Lin Ligang, Zhao Kongyin, Yu Guihua
State Key Laboratory of Separation Membranes and Membrane Processes/National Centre for International Joint Research on Separation Membranes, Tiangong University, Tianjin, 300387, P. R. China.
Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China.
Adv Mater. 2024 May;36(18):e2311416. doi: 10.1002/adma.202311416. Epub 2024 Jan 29.
Emerging organic contaminants in water matrices have challenged ecosystems and human health safety. Persulfate-based advanced oxidation processes (PS-AOPs) have attracted much attention as they address potential water purification challenges. However, overcoming the mass transfer constraint and the catalyst's inherent site agglomeration in the heterogeneous system remains urgent. Herein, the abundant metal-anchored loading (≈6-8 g m) of alginate hydrogel membranes coupled with cross-flow mode as an efficient strategy for water purification applications is proposed. The organic flux of the confined hydrogel interfaces sharply enlarges with the reduction of the thickness of the boundary layer via the pressure field. The normalized property of the system displays a remarkable organic (sulfonamides) elimination rate of 4.87 × 10 mg min mol. Furthermore, due to the fast reaction time (<1 min), cross-flow mode only reaches a meager energy cost (≈2.21 Wh m) under the pressure drive field. It is anticipated that this finding provides insight into the novel design with ultrafast organic removal performance and low techno-economic cost (i.e., energy operation cost, material, and reagent cost) for the field of water purification under various PS-AOPs challenging scenarios.
水基质中新兴的有机污染物对生态系统和人类健康安全构成了挑战。基于过硫酸盐的高级氧化工艺（PS-AOPs）因其能应对潜在的水净化挑战而备受关注。然而，克服非均相体系中的传质限制和催化剂固有的位点团聚问题仍然十分紧迫。在此，提出了将大量金属锚定负载（≈6 - 8 g/m）的海藻酸盐水凝胶膜与错流模式相结合，作为水净化应用的一种有效策略。通过压力场，受限水凝胶界面的有机通量随着边界层厚度的减小而急剧增大。该系统的归一化性能显示出显著的有机（磺胺类）去除率，为4.87×10 mg min/mol。此外，由于反应时间短（<1分钟），在压力驱动场下错流模式的能源成本极低（≈2.21 Wh/m）。预计这一发现为在各种PS-AOPs具有挑战性的场景下，水净化领域具有超快有机去除性能和低技术经济成本（即能源运营成本、材料和试剂成本）的新颖设计提供了思路。
