LaCoO3钙钛矿活化过一硫酸盐降解萘普生

在催化活化过一硫酸盐(PMS)降解水中污染物的反应中，通过添加钴基钙钛矿提高反应效率。利用溶胶凝胶法制备了LaCoO₃钙钛矿，通过实验评估LaCoO₃/PMS体系对非甾体抗炎药萘普生（NAP）的降解效果。分析了LaCoO₃投加量、PMS投加量、反应初始pH、Cl^-浓度和腐殖酸（HA）对NAP去除率的影响以及该体系的矿化能力。结果表明NAP降解的反应速率随LaCoO₃和PMS投加量增加而增大；反应初始pH在5.0时NAP降解效果最好；溶液中存在Cl^-对降解有促进效果，且Cl^-浓度越大促进效果越明显；腐殖酸（HA）对反应有一定程度的抑制效果；LaCoO₃在重复利用5次时仍有较好的稳定性。此外，自由基淬灭实验结果表明在LaCoO₃/PMS体系中SO₄^·-为主要活性物质。

Degradation of naproxen by peroxymonosulfate activated with LaCoO3

In the reaction of catalytically activated peroxymonosulfate (PMS) degradation of pollutants in water, the reaction efficiency was improved by adding cobalt-based perovskite. The degradation effect of LaCoO₃/PMS on naproxen（NAP） was evaluated by different system experiments. The effects of LaCoO₃ dosing, PMS dosing, initial pH, Cl^- concentration and humic acid (HA) on NAP removal rate and mineralization ability of the system were investigated. The degradation rate of NAP increased with the rising PMS concentration and increasing LaCoO₃ dosage. The best removal efficiency was obtained at pH 5.0. Moreover, the presence of Cl^- in solution slightly promoted the degradation of NAP, however, humic acid (HA) inhibited the reaction to some extent. LaCoO₃ still has good stability after five reuses. In addition, the radical quenching test showed the \mathrm{S}{\mathrm{O}}_{\mathrm{4}}^{·-} was the main radical specie of LaCoO₃/PMS reaction.