类芬顿铁基功能材料除砷的应用与机制（英文）

亚砷酸盐(As(Ⅲ))和砷酸盐(As(V))是天然水中砷的主要存在形态，其中As(Ⅲ)由于其高毒性和高迁移率，对人类和环境的危害远大于As(V)。因此，将As(Ⅲ)预氧化为As(V)被认为是降低砷毒性、提高砷去除率的有效手段。由于铁基功能材料具有较高的催化活性和砷亲和力，在非均相类芬顿体系中可以快速将As(Ⅲ)氧化为As(V)，然后通过吸附和表面共沉淀将As(V)从水中去除。本文综述零价铁和铁(羟基)氧化物等不同铁基功能材料对砷去除的影响，以进一步阐明非均相芬顿法中As(Ⅲ)的催化氧化及去除机理。最后，本文还展望了应用于As(Ⅲ)氧化的铁基功能材料目前面临的主要挑战和机遇。

Application and mechanism of Fenton-like iron-based functional materials for arsenite removal

Between the two major arsenic-containing salts in natural water, arsenite (As(III)) is far more harmful to human and the environment than arsenate (As(V)) due to its high toxicity and transportability. Therefore, preoxidation of As(III) to As(V) is considered to be an effective means to reduce the toxicity of arsenic and to promote the removal efficiency of arsenic. Due to their high catalytic activity and arsenic affinity, iron-based functional materials can quickly oxidize As(III) to As(V) in heterogeneous Fenton-like systems, and then remove As(V) from water through adsorption and surface coprecipitation. In this review, the effects of different iron-based functional materials such as zero-valent iron and iron (hydroxy) oxides on arsenic removal are compared, and the catalytic oxidation mechanism of As(III) in heterogeneous Fenton process is further clarified. Finally, the main challenges and opportunities faced by iron-based As(III) oxidation functional materials are prospected.