催化作用
高碘酸盐
降级(电信)
锰
化学
浸出(土壤学)
超顺磁性
高碘酸钾
环境污染
无机化学
核化学
有机化学
计算机科学
电信
物理
环境科学
磁化
环境保护
量子力学
磁场
土壤科学
土壤水分
作者
Wenji Xu,Xuemei Zheng,Zichen Shangguan,Jing Qu,Wei Zhang
标识
DOI:10.1016/j.cej.2023.142562
摘要
The treatment of water pollution caused by excessive usage of antibiotics has been widely concerned. Periodate (PI)-oxidation method poses a good application prospect for antibiotic degradation with a stable solid oxidant and excellent degradation efficiency. In this study, manganese ferrite (MnFe2O4) with superparamagnetic property, low ion leaching, and outstanding activation performance was chosen to active PI to remove ciprofloxacin (CIP) for the first time. And MnFe2O4/PI system could achieve 98.8% removal efficiency of 10 mg/L CIP in 90 min (pH = 5.4, 0.3 g/L MnFe2O4, 0.2 g/L PI). With the conversion of Fe(II)/Fe(III) and Mn(II)/Mn(III)/Mn(Ⅳ), singlet oxygen (1O2), iodate radical (IO3•), and superoxide radical (O2•−) were formed as the primary active substances to remove CIP. Meanwhile, the redox cycle of Fe(III)/Fe(II) (0.77 V) and Mn(Ⅳ)/Mn(III) (0.15 V) accelerated the process of CIP degradation. Almost 90% of CIP could be removed by MnFe2O4/PI system after 5th run, showing the excellent stability of MnFe2O4 to activate PI. Besides, MnFe2O4/PI system showed tolerance to different background water and selectivity to different antibiotics. This work presents a novel strategy to integrate MnFe2O4 with PI for antibiotic-polluted water treatment.
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