泡沫镍基穿透式电极活化过一硫酸盐去除水中氧氟沙星

打开文本图片集

中图分类号：X523 文献标志码：A

Abstract：Aimingatthe problemthatemerging polutants suchasofloxacinin waterbodies were dificult toremove，flower-like Ni（OH）2 nanosheet arrays were in situ grown on the nickle foam surface by using potassium permanganate direct oxidation method， successfully constructing a l Vi/Ni（OH）2 electrode with a three-dimensional array structure.The microstructureandcompositional characteristicsof the fabricated electrodeswere thoroughlyanalyzedandcharacterized.A flow-through electro-activated peroxymonosulfate reactor was established by using the Ni/Ni （OH）2 electrode as the cathodeandcarbonfiberfeltastheanode.Theofloxacinremovalperformanceandinfluencingfactorsweresystematicall investigated.Theresultsshowthatoperationalparametersof thereactorsignificantlyaffectofloxacinremovaleficiency.Under conditions that the concentration of peroxymonosulfate is 1 mmol/L，applied bias is 2.5V ，retention time is 3.86 min， and pH value is 7，the removal rate of ofloxacin reaches 81.9% . Radical quenching experiments and in situ electron paramagnetic resonance analysis confirm that hydroxyl radicals ⋅⋅ OH and singlet oxygen 1O2 are the predominant reactive species，playing a key role in the electro-activated peroxymonosulfate process for ofloxacin degradation.

Keywords： flow-through electrode；peroxymonosulfate；nickel foam；ofloxacin

当前，国内外对抗生素、药品与个人护理用品（PPCPs）、全氟化合物（PFCs）等多种环境新兴污染物高度关注，由于常规污水处理工艺不能有效去除新兴污染物，因此亟须开发新型、高效、低成本的新兴污染物深度处理技术[1]。（剩余12820字）