纳米TiO_2光催化去除水华藻类的研究进展

Research progress on photocatalytic removal of algae causing water bloom by nano-TiO_2

由水体富营养化而引起的蓝藻水华是目前全球面临的重大水环境问题,严重威胁水生生态环境以及人类的健康。综述了近年来以TiO_2为代表的纳米材料光催化技术在蓝藻水华治理方面的研究现状,其中光催化负载体技术与可见光响应下高效光催化性能的研究广泛;归纳并总结了TiO_2抑制蓝藻生长光催化机理的一般规律性以及其对蓝藻细胞作用的活性氧(ROS)破坏机制。TiO_2光催化技术未来的发展趋势具有长期可行性,但在实际应用中新型结构单元的高效光催化剂的探索,负载装置应用的完善以及对水体中有害毒素的去除仍然是研究的难题。

The cyanobacteria bloom caused by eutrophication of water is a major water environmental problem facing the world,which seriously threatens the aquatic ecological environment and human health.The research status of nano-material photocatalysis technology represented by TiO 2 in the treatment of cyanobacterial blooms is reviewed.Supporters for photocatalysis and catalysts with high-efficiency photocatalytic performance under visible light response are widely studied.Furthermore,the general rule of photocatalytic mechanism of TiO 2 inhibiting cyanobacterial growth and destruction of reactive oxygen species (ROS) in cyanobacterial cells are summarized.The future development trend of TiO 2 photocatalysis technology has long-term feasibility,but in practical applications,the exploration of high-efficiency photocatalysts of new structural units,the improvement of load device application,and the removal of harmful toxins in water are still challenges.