Due to a large number of application of the nitrogen fertilizer, unreasonable treatments of the animal wastes, domestic sewage and industrial sewage including nitrogen, and garbage stacking in recent years, the concentration of NO, that was toxic to humans in worldwide ground water presented rise trend at different degrees. Photocatalytic removal technology of the nitrogen had many advantages and was widely valued. Cost was low, and there was no secondary pollution. Reaction condition was mild, and reaction time was short. The photocatalytic reduction research of nitrate at home and abroad was reviewed in detail, including photocatalyst, scavenger and reaction mechanism. In particular, perspectives for photocatalytic reduction of the nitrate were detailedly analyzed.%近年来,随着大量氮素化肥的施用,以及动物粪便、生活污水和含氮工业废水的不合理处理和生活垃圾的堆放,世界各国地下水中硝酸盐浓度在不同程度上均呈现出上升趋势.光催化脱氮技术具有成本低,无二次污染,反应条件温和、反应时效短等优点,得到广泛关注.综述了国内外光催化还原硝酸根的研究进展,详细分析了各种催化剂、牺牲剂和反应机理,并展望了光催化还原硝酸根的研究前景.
展开▼
