水滑石/铁氧化物复合材料的制备及光催化除藻性能研究

Synthesis and characterization of Fe-LDH and its application on a removal of microcystis aeruginosanosa

由于水体富营养化导致的蓝藻问题日益严重.用共沉淀法制备了4种水滑石铁氧化物,并将其用来杀藻.用XRD、FT-IR、SEM等表征分析其晶体结构、基团化学环境及其形貌,探讨其合成机理.比较了4种水滑石/铁氧化物杀藻能力,探究磁铁矿对H2O2的分解能力,并比较光暗条件下的杀藻情况.实验结果表明:在外加光和H2O2条件下,水滑石铁氧化物与之形成异相Fenton体系,对铜绿微囊藻的去除率高达90%以上.

The blue-green algae growing problem caused by eutrophication is becoming more and more serious,especially microcystis aeruginosanosa.Four kinds of hydroxide/iron oxide（magnetite FeHDL,hematite Fe-HDL,goethite Fe-HDL and specularite Fe-HDL）was prepared by coprecipitation and were used to remove the algae.The crystal structure,chemical groups and morphology of magnetite Fe-HDL was analyzed by XRD,FT-IR and SEM,and the synthetic mechanism was also discussed.Compared with the four different kinds of Fe-HDL on a removal of microcystis aeruginosanosa,and explored the magnetite decomposing capability of H2O2.We also compared the condition under light and the darkness to remove the algae.The experimental results showed that under the condition of coupled with light and H2O2,the Fe-HDL could form heterogeneous Fenton process with them,and the removal rate as high as 90% above.