溶液中Cr(Ⅵ)离子的催化还原研究进展

Research Progress in Catalytic Reduction of Hexavalent Chromium Ion in Solution

Cr(Ⅵ)作为一种毒性较强的环境污染物,广泛存在于废水和土壤中.随着人们环保意识的增强,它的治理日益得到研究者的广泛关注.结合近年来国内外研究现状,笔者对Cr(Ⅵ)离子的处理技术尤其是化学法进行了综述,主要分析了各种方法的反应机理和优缺点.由于光催化技术能够高效地利用可再生资源——太阳光,因此对其在去除Cr(Ⅵ)中的应用进行了着重阐述,包括光催化剂种类、催化条件等对催化还原效率的影响,并对光催化还原Cr(Ⅵ)的未来前景进行了展望.

Cr（Ⅵ）is a highly toxic environmental pollutant,existing widely in wastewater and soil.With the improvement of people＇s environmental awareness,its governance has been paid more and more attention by researchers both at home and abroad.In this paper,the advantages and disadvantages of various methods on the treatments of Cr（Ⅵ）and reaction mechanisms have been reviewed.In particular,the photocatalytic technology in the removal of Cr（Ⅵ）process are highlighted.The influencing factors of reaction parameters on catalytic reduction efficiency are described in detail,including the types of photocatalyst,the catalytic conditions.And the future prospects of photocatalytic reduction of Cr（Ⅵ）are also discussed.