School of Environment, POPs Research Center, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing 100084, China.
School of Environment, POPs Research Center, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing 100084, China.
J Hazard Mater. 2014 Jun 15;274:443-54. doi: 10.1016/j.jhazmat.2014.04.038. Epub 2014 Apr 25.
Perfluorinated compounds (PFCs) have drawn great attention recently due to their wide distribution in aquatic environments and potential toxic to animals and human beings. Adsorption not only is an effective technology to remove PFCs from water or wastewater, but also affects PFC distribution at solid-liquid interfaces and their fate in aquatic environments. This article reviews the adsorption behavior of different PFCs (mainly perfluorooctane sulfonate and perfluorooctanoate) on various adsorptive materials. Some effective adsorbents are introduced in detail in terms of their preparation, characteristics, effects of solution chemistry and PFC properties on adsorption. Adsorption mechanisms of PFCs on different adsorbents are summarized, and various interactions including electrostatic interaction, hydrophobic interaction, ligand exchange, and hydrogen bond are fully reviewed. The adsorbents with amine groups generally have high adsorption capacity for PFCs, and formation of micelles/hemi-micelles plays an important role in achieving high adsorption capacity of perfluorinated surfactants on some porous adsorbents. Hydrophobic interaction is mainly responsible for PFC adsorption, but the difference between PFCs and traditional hydrocarbons has not clearly clarified. This review paper would be helpful for the preparation of effective adsorbents for PFC removal and understanding interfacial process of PFCs during their transport and fate in aquatic environments.
全氟化合物（PFCs）由于其在水环境中的广泛分布以及对动物和人类潜在的毒性而受到极大关注。吸附不仅是一种从水中或废水中去除 PFCs 的有效技术，而且还会影响固-液界面处 PFC 的分布及其在水环境中的命运。本文综述了不同 PFCs（主要是全氟辛烷磺酸和全氟辛酸）在各种吸附材料上的吸附行为。详细介绍了一些有效的吸附剂，包括它们的制备、特性、溶液化学和 PFC 性质对吸附的影响。总结了 PFCs 在不同吸附剂上的吸附机理，并全面回顾了包括静电相互作用、疏水相互作用、配体交换和氢键在内的各种相互作用。具有胺基的吸附剂通常对 PFCs 具有高吸附能力，并且胶束/拟胶束的形成在某些多孔吸附剂上实现全氟表面活性剂的高吸附能力方面起着重要作用。疏水相互作用主要负责 PFC 的吸附，但 PFC 与传统烃类之间的差异尚未明确阐明。这篇综述文章将有助于制备有效的 PFC 去除吸附剂，并理解 PFC 在水环境中传输和命运过程中的界面过程。
