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南京大学Nat. Rev. Clean Technol.:2025年水体PFAS处理技术进展

  • 2026-02-04 19:47:36
南京大学Nat. Rev. Clean Technol.:2025年水体PFAS处理技术进展

    全氟和多氟烷基物质(PFAS)因其极高的化学稳定性与持久性,被誉为“永久化学品”,在水环境中的去除与降解极具挑战。传统处理技术多依赖于非破坏性分离(如吸附、膜过滤)或破坏性转化(如热解、焚烧),但均面临副产物二次污染、能耗高、难以实现完全矿化等瓶颈。2024年以来,全球饮用水标准日趋严格,推动了对可规模化、集成化且能量化评估的PFAS处理技术的迫切需求。

    近日,南京大学张淑娟教授团队在Nature Reviews Clean Technology(自然综述·清洁技术)发表了题为“Advances in PFAS treatment in water in 2025”的综述论文(Year in review),系统总结了2025年水体全氟及多氟烷基化合物(PFAS)处理技术进展。

    关键进展

    • 研究发现,全氟及多氟烷基物质(PFAS)还原脱氟过程中的主要障碍并非C–F键的强度,而是初始电子转移步骤所需的高活化自由能。
    • 新兴的混合处理技术(如活性炭吸附结合闪蒸焦耳加热)被开发出来,可同时实现PFAS矿化与高附加值产物的生成。
    • 硅酸盐改性零价铁或含硅灰石(CaSiO₃)颗粒的微滴技术被应用于PFAS降解与氟回收。

    图1:a、非破坏性分离技术(例如膜过滤或颗粒活性炭(GAC)吸附)和破坏性转化方法(可按相态(均相与非均相)、应用地点(原位与异位)和完全性(矿化与非矿化)进行分类)。b、全氟和多氟烷基物质(PFAS)修复的混合方法。c、一种实现PFAS去除净零成本的吸附-热解-循环工艺。d、一种基于微滴的工艺,可在矿物颗粒存在下同时实现界面还原和氧化以及氟固定。

    基础机理的突破性认知PFAS在水体中的高效降解长期面临机理不明确、复杂基质中选择性差、技术评价体系不统一等挑战。明确其降解路径,尤其是中间产物对脱氟过程的抑制作用,对提升处理效能及设计可降解替代物至关重要。2025年,一项针对41种PFAS在紫外/亚硫酸盐体系中降解机理的实验与理论研究表明,初始电子转移步骤的高活化自由能(而非C-F键强度)是限制还原脱氟的关键。该发现从动力学层面揭示了PFAS降解的瓶颈,并指出须通过耦合还原与氧化过程的混合处理体系,突破反应能垒,实现PFAS及其顽固中间产物的完全矿化。

    混合处理技术:从降解到资源化基于上述机理认识,2025年研究进一步推动混合处理技术向资源回收拓展。例如,将负载PFAS的颗粒活性炭经碱处理与闪蒸焦耳加热结合,在实现>90%氟转化率的同时,将废活性炭转化为高附加值的闪蒸石墨烯,形成“处理-再生-增值”一体化技术路径,显著提升过程经济性。

    原位修复与界面反应新体系同年,PFAS原位修复技术亦取得重要进展硅酸盐改性纳米零价铁通过路易斯酸作用活化C-F键,使原子氢脱氟能垒显著降低,在模拟渗透性反应墙体系中,对PFOA的脱氟效率提升至75–92%,较传统材料提高八倍。此外,微液滴‑矿物界面反应体系在带电微滴与硅灰石颗粒界面实现PFAS近完全矿化与氟同步固定,为喷雾式或气溶胶反应器等新型处理工艺提供了理论依据。为客观评估此类新技术,引入如脱氟效能指标(EEOD)标准化评价参数,有助于其与实际水处理体系的对接与比较。

    结论与展望

    2025年PFAS水处理研究呈现出从“末端处理”向“过程集成与资源转化”的战略转型。通过厘清电子转移限速机制,研究者设计出混合氧化还原系统,有效突破PFAS降解动力学屏障;开发了硅酸盐修饰零价铁等材料,通过路易斯酸活化C-F键,大幅降低脱氟能垒;并在微滴化学闪速焦耳加热等新平台上实现PFAS高效矿化与氟资源固定。这些进展不仅提升了处理效率与经济性,更推动了PFAS从“污染物”向“潜在资源”的认知转变。未来可探索将实验室尺度工艺放大至市政/工业废水场景,加强复杂水体基质中的选择性调控,并建立完整的质量平衡与全生命周期评估体系。

    文献信息Shuangshuang Wei, Changze Song & Shujuan Zhang. Advances in PFAS treatment in water in 2025. Nat. Rev. Clean Technol. 2, 15–16 (2026). https://doi.org/10.1038/s44359-025-00126-1

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    1. CONNECT:[ UseTime:0.000841s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
    2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001297s ]
    3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000678s ]
    4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003850s ]
    5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001310s ]
    6. SELECT * FROM `set` [ RunTime:0.000658s ]
    7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001590s ]
    8. SELECT * FROM `article` WHERE `id` = 475146 LIMIT 1 [ RunTime:0.005723s ]
    9. UPDATE `article` SET `lasttime` = 1770242412 WHERE `id` = 475146 [ RunTime:0.011346s ]
    10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.012556s ]
    11. SELECT * FROM `article` WHERE `id` < 475146 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002398s ]
    12. SELECT * FROM `article` WHERE `id` > 475146 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004706s ]
    13. SELECT * FROM `article` WHERE `id` < 475146 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.027067s ]
    14. SELECT * FROM `article` WHERE `id` < 475146 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.059411s ]
    15. SELECT * FROM `article` WHERE `id` < 475146 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.026504s ]
    0.320912s