Application Of Prussian Blue And Its Functional Materials In Wastewater Purification

Prussian blue functional materials are widely used as adsorbents and activators.In this paper,a recyclable PB / luffa composite material is used to effectively absorb cesium ions in water and activate Na2S2O8 to treat golden orange ? dye wastewater.At the same time,a derivative of PB,Co-PB(Co was mixed into PB)is used to efficiently activate KHSO5 to degrade golden orange ? dye wastewater.In this paper,the effects of temperature,p H,and coexisting ions on each experiment are discussed,and the adsorption performance of PB /luffa and the activation performance of PB /luffa and Co-PB are tested.The activation mechanism is explored through quenching experiments.The results showed that at p H = 7,the higher the temperature,the better the removal effect of PB /luffa on cesium ions to some extent.The PB and PB /luffa adsorption Cs+ experiments reached equilibrium in about 12 hours.The equilibrium adsorption capacity of PB on cesium ions was 102.01 mg / g,while that of PB / luffa on cesium was 29.22 mg / g.After three cycles of PB / loofah fibers,the adsorption capacity can still reach 71.2% of the first adsorption equilibrium amount,which shows that PB / luffa have a good prospect for the application of Cs+ removal.In this paper,in the reaction system of PB /luffa activation of Na2S2O8 and Co-PB activation of KHSO5,the activated substances produced are mainly singlet oxygen,and there are some non-free radicals such as ·O2-,SO4-·.The higher the temperature,the better the removal effect of golden orange ? by the activation experiment.When the temperature reached 45?,Na2S2O8 and KHSO5 were thermally activated.The activation performance of Co-PB did indeed improve greatly compared to PB,and there are little effect on activation experiments with p H changing.At room temperature,Prussian blue functional materials can also activate persulfate to effectively remove golden orange ?.The removal rate of golden orange ? by PB/luffa at 120 min and Co-PB at 60 min can reach more than 98%,which proves that PB/luffa And Co-PB can be widely used in activation experiments.