孙胜鹏副教授在 Chemical Engineering Journal 上发表研究论文

Degradation of ibuprofen in water by FeII-NTA complex-activated persulfate with hydroxylamine at neutral pH

Yaoyao Jin, Sheng-Peng Sun^*（孙胜鹏）, Xueying Yang, Xiao Dong Chen

Suzhou Key Laboratory of Green Chemical Engineering, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials

Science, Soochow University, Suzhou, Jiangsu 215123, PR China

Chemical Engineering Journal 337 (2018) 152--160

The activation of potassium persulfate (KPS) by Fe^II-NTA complex has been investigated to degrade ibuprofen in aqueous solutions under neutral pH conditions. The results showed that ibuprofen degradation by Fe^II-NTA/KPS process was not successful due to the rapid oxidation of Fe^II-NTA complex by dissolved oxygen. However, an efficient degradation of ibuprofen was achieved by Fe^II-NTA/KPS process in the presence of hydroxylamine (HA). It was evident that the steady-state Fe^IIconcentration in Fe^II-NTA/HA/KPS process was much higher than that in Fe^II-NTA/KPS process because of the quick regeneration of Fe^II-NTA complex by HA. The suitable conditions for Fe^II-NTA/HA/KPS process were obtained at [Fe^II] = 0.1 mM, [NTA/Fe] = 1:1, [HA/Fe] = 20:1 and [KPS/Fe] = 30:1. The generation of sulfate radical (SO₄⁻) and hydroxyl radical (OH) contributed to ∼80% of ibuprofen degradation, and ∼20% of ibuprofen degradation was resulted from other reactive species such as persulfate radical (S₂O₈⁻). Fe^II-NTA complex was more effective than Fe^II-EDDS and Fe^II-EDTA complexes in the activation of KPS, and moreover which was also capable of activating Oxone at neutral pH. A successful degradation of ibuprofen in lake water was achieved by Fe^II-NTA/HA/KPS process, while the rate of ibuprofen degradation in simulated groundwater was relatively slower because of the scavenging effects of HCO₃⁻on SO₄⁻/OH. The major intermediates in ibuprofen degradation were identified by LC-QTOF-MS analysis and the degradation pathways were proposed.

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