Anderson Type Polyoxometalate Material Design And Its Application To Fenton-like Reaction For Degradation Of Organic Wastewater

At present,the world's environmental problems are becoming more and more serious,and the problem of water pollution is particularly prominent.The presence of toxic and harmful substances in organic wastewater not only pollutes the environment,but also affects people's health.How to remove organic pollution from wastewater has always been a hot issue in the field of water treatment.Conventional sewage treatment technology has certain limitations for the treatment of refractory organic pollution,and advanced oxidation technology can quickly remove organic pollutants and realize the purification of organic wastewater,which has attracted much attention.Therefore,this paper explores different Fenton-like catalysts for targeted degradation of organic pollutants.1.Fe-based Anderson-type polyoxometalate is simple to prepare and has good catalytic effect after loading.In this experiment,the graphene oxide solution was obtained by Hammers oxidation method,the surface of graphene oxide was modified by ethylenediamine,the graphene oxide hydrogel was obtained by hydrothermal reduction method,and the graphene oxide aerogel was obtained after lyophilization.Ethylenediamine is beneficial to promote the formation of three-dimensional network structure of graphene oxide in hydrothermal reaction,and it is beneficial to reduce the electronegativity of graphene oxide surface,which is beneficial to Fe-based Anderson polyanion loading on graphene oxide.The methylene blue solution can be rapidly degraded in 30 minutes,and no waste sludge is produced in the process of degradation of organic sewage.As a heterogeneous catalyst,the recovery is simple,and has a typical significance for improving the degradation-like effect of Fenton,which is beneficial to popularization.Design to other types of Fenton heterogeneous catalysts.2.Cu~?-Anderson polyoxometalate/graphene oxide Fenton catalyst can degrade rhodamine B under wide p H conditions.In this experiment,Cu~?-Anderson polyoxometalate was used to obtain Cu~?-Anderson polyoxometalate/graphene oxide catalytic material by immersion freeze-drying method.The experimental conditions in Chapter 2 were explored in more detail.The model was used to simulate the degradation curve of Rhodamine B.It was found that the degradation effect of Rhodamine B was linear in the experimental range.Compared with other Fenton reaction systems,Cu II-Anderson polyoxometalate/graphene oxide catalytic material degrades rhodamine B under neutral conditions and maintains high degradation after five cycles of experiments.Activity,is expected to play its application value in actual sewage treatment.