Yang Lin, Wang Yuanyuan, Sun Yongxiang, Yu Ruiquan, Chu Yifu, Yao Yuan, Liu Chenxu, Li Ning, Chen Lingyun, Liu Jifang, Zhao Ziqian, Zeng Hongbo
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada.
Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.
Adv Mater. 2025 Jul;37(30):e2505008. doi: 10.1002/adma.202505008. Epub 2025 May 16.
Ensuring drinking water safety remains a critical challenge, particularly when treating complex water sources, due to secondary pollution caused by active chemical additives. Herein, a novel CO-responsive smart wood scaffold that leverages non-toxic CO activation is developed to achieve highly efficient removal of carcinogenic natural organic matter (NOM) and broad-spectrum microbial disinfection without requiring additional chemical agents. Unlike conventional water purification techniques that face a safety-efficacy trade-off, the multi-stage CO-responsive wood scaffold offers exceptional tunability in NOM abatement across diverse environmental conditions, including variable water chemistry, NOM composition, high salinity, and real-world water sources. The purified water meets stringent drinking water standards (e.g., UV reduction, dissolved organic carbon removal, and bacterial elimination). It is found that the highly efficient NOM adsorption mainly originates from the strong and stable CO-triggered cation-π interaction between the scaffold surface and aromatic NOM groups, as revealed via high-resolution mass spectrometry and direct intermolecular force measurements. This ecofriendly and contamination-free CO-responsive strategy provides a transformative approach to overcoming secondary pollution challenges in water purification, offering a scalable and sustainable platform for environmental applications and beyond.
确保饮用水安全仍然是一项严峻挑战，尤其是在处理复杂水源时，因为活性化学添加剂会导致二次污染。在此，开发了一种利用无毒一氧化碳活化的新型一氧化碳响应智能木质支架，以实现高效去除致癌天然有机物（NOM）和广谱微生物消毒，而无需额外的化学试剂。与面临安全-效能权衡的传统水净化技术不同，这种多阶段一氧化碳响应木质支架在各种环境条件下，包括不同的水化学性质、NOM组成、高盐度和实际水源，在NOM去除方面具有出色的可调性。净化后的水符合严格的饮用水标准（如紫外线降低、溶解有机碳去除和细菌消除）。通过高分辨率质谱和直接分子间力测量发现，高效的NOM吸附主要源于支架表面与芳香族NOM基团之间强烈且稳定的一氧化碳触发的阳离子-π相互作用。这种环保且无污染的一氧化碳响应策略为克服水净化中的二次污染挑战提供了一种变革性方法，为环境应用及其他领域提供了一个可扩展且可持续的平台。
