【摘要】 以泡沫镍作为载体,利用电沉积技术将纳米TiO2负载在泡沫镍上,制成固载型TiO2光催化反应器。研究表明,经过光催化反应器处理的富营养水体,30 h内叶绿素a由96.2 mg/m3降至2.2mg/m3,下降率达97.6%,而未负载纳米TiO2普通泡沫镍材料,在同样光强的紫外灯照射下,叶绿素a下降率为74.3%,表明紫外光照射虽然也具有一定的杀藻功能,但是光催化反应才是藻类被杀灭的主要原因。利用9.54 m3景观喷水池进行杀藻中试,光催化反应器也同样表现出优异的杀藻性能,12 d内叶绿素a由18.7 mg/m3降至1.9mg/m3,下降率达到89.8%,水体由浓绿变为清澈见底,这表明光催化反应器具有很强的杀藻能力,通过有效杀灭富营养水体中藻类、控制藻类基数,对应急处理城市景观水、湖泊等富营养水体和突发性藻华,提高生物-生态法处理效率,改善城市水环境具有十分重要的意义。更多还原

【Abstract】 With nickel foam as a carrier,TiO2 was loaded on nickel foam by electrodeposition and a TiO2 photocatalytic reactor was made.The study shows that by the photocatalytic reactor chla in eutrophic water dropped from 96.2 mg/m3 to 2.2 mg/m3,decreasing 97.6% in 30 hours,while under the same intensity of UV radiation,the decline rate of chla was only 79.5% in the ordinary nickel without load TiO2 reactor.The results showed that nanophotocatalytic material was the important reasons for killing algae.A 9.54 m3 spray pool was used for the algaekilling test,the result showed the photocatalytic reactor killed algae and exhibited excellent performance,chla dropped from 18.7 mg/m3 to 1.9 mg/m3,decreasing 89.8% in 12 days.The performance of the photocatalytic reactor indicates that it has a very strong capacity to kill algae.The reactor has a great significance in effectively killing algae in eutrophic waters,controlling algae base,emergently treating eutrophic urban landscape water and lake water,and improving urban water environment.更多还原