Preparation Ofiron Ore-hydrotalcite/ Cuprous Oxide/titanium Dioxide And Its Photocatalytic Performance To Remove Algae

Algae blooms caused by eutrophication pollution has become a serious environmental problem.Cyanobacteria blooms reduce water clarity and produce microcystins which threats drinking water safety,fisheries and aquaculture.Therefore,finding the right method and technology to control algae outbreak has become an important issue in the field of the environment.Fenton oxidation technologyis a new kind of green environmental friendly technology.Due to its unique advantages,such as strong oxidation ability,simple equipment and no selectivity,it was widely used in the persistence and hard biodegradation of organic wastewater treatment.But traditional heterogeneous Fenton system such as pH range too narrow?2.0-4.0?,the large amount of iron sludge cause secondary pollution,reaction can't circulation,limits the application in the practical wastewater treatment.Light heterogeneous Fenton system as optimization model of Fenton technology,not only retains the procession of Fenton system many advantages,and can effectively overcome the Fenton system many insufficiencies,so in recent years has caused the great attention of scholars.Based on natural iron ore source of iron,with hydrotalcite as the carrier,with cuprous oxide and titanium dioxide as sources of hydrogen peroxide,the preparation of the molten iron containing talc/cuprous oxide/titanium dioxide agent to remove algae,build heterogeneous Fenton system applied to the fields to remove algae in light.Mainly for the following research:?1?Choose four standing in the environment and is used widely in the field of environmental natural iron ore magnetite,limonite,hematite,lens as the source of iron ore,the hydrotalcite as carrier,was prepared by four different kinds of iron ore-hydrotalcite?Fe-LDH?.Through the decomposition of hydrogen peroxide and light catalytic remove algae found that the effect of magnetite is best,thanks to high Fe2 + content in magnetite structure.?2?Based on magnetite,constructed Fe-LDH/Cu₂O/TiO₂ agent to remove algae.Through XRD characterization,magnetite iron mainly Fe3O4,as inverse spinel phase.FT-IR show Fe-LDH/Cu₂O/TiO₂ is mainly through the metal-carboxyl covalent compound together.TEM and SEM showed that Cu₂O and TiO₂ is spherical,Cu₂Ogrowth at LDH layers and along the edges.BET showed that Fe-LDH/Cu₂O/TiO₂ has a good adsorption performance.?3?Explores the Cu₂O and Cu₂O /TiO₂ supply ability of H₂O₂,explores the Fe-LDH/Cu₂O/TiO₂ remove the algae under photocatalytic conditions.The study found that the light is a necessary condition to remove the algae from the effective,and the process to remove algae is a continuous process of oxygen consumption.?4?Algae removal was studied in the process of catalytic stability and structural stability,suggests that agent to remove algae in photocatalytic process has a good stability.UV-Vis DRS and PL spectra show that Fe-LDH/Cu₂O/TiO₂ can inspire in the visible light,different from ultraviolet to visible light response range,and further discusses the Fe^?/Fe^? cycle.