Fe3O4活化过硫酸盐体系同步去除诺氟沙星和铅

采用Fe₃O₄活化过硫酸盐（PS）同步去除水中的NOR （诺氟沙星）和Pb （II）.探讨了Fe₃O₄投加量、PS浓度、初始pH值和Pb （II）浓度对NOR降解的影响.结果表明，NOR的降解符合伪一级反应动力学，在温度为30℃、NOR初始浓度为5.0mg/L、Pb （II）浓度为1.0mg/L、Fe₃O₄投加量为2.0g/L、PS浓度为1.5mmol/L、初始pH值为7.0的条件下，反应120min后，NOR降解率达90.2%，Pb （II）去除率为99.5%.自由基淬灭实验证实，硫酸根自由基（SO₄^-·）是NOR降解的主要自由基.通过LC-MS分析结果推测了NOR可能的降解路径和中间产物.Fe₃O₄活化PS高级氧化工艺可作为一种同步去除有机污染物和重金属的工艺.

Simultaneous removal of norfloxacin and Pb(II) via Fe3O4-activated persulfate oxidation

This study employed the advanced oxidation process of persulfate, activated with Fe₃O₄ magnetic nanoparticles (Fe₃O₄/PS), for simultaneous removal of NOR (norfloxacin) and Pb(II) in wastewater. The effects of Fe₃O₄ dosage, PS concentration, initial pH value and Pb(II) concentration on the degradation of NOR were investigated. Experimental results indicated that the degradation of NOR followed the pseudo-first-order kinetics. The degradation of NOR and the removal of Pb(II) reached to 90.2% and 99.5%, respectively, under the reaction conditions of temperature of 30℃, initial NOR concentration of 5.0mg/L, Fe₃O₄ dosage of 2.0g/L, PS concentration of 1.5mmol/L, initial pH value of 7.0, and reaction time of 120minutes. Free radical quenching experiments confirmed that SO₄^-· was the dominant free radical in the degradation of NOR. The possible degradation pathways and intermediate products of NOR were inferred using LC-MS. This study indicated that the Fe₃O₄-activated PS oxidation process could be served as a novel technique for the simultaneous removal of organic pollutants and heavy metals.