零价铁
过氧乙酸
化学
核化学
电子顺磁共振
无机化学
吸附
过氧化氢
有机化学
核磁共振
物理
作者
Zhujun Dong,Zihao Li,Jiatong Zhang,Yousheng Zou,Yongchao Duan,Mengxiao Yu,Xiaoyü Li,Guangyu Wu,Wenyan Zhang,Jun Jiang,Xiang Li,Ying Zhang,Yuwei Pan
标识
DOI:10.1016/j.seppur.2023.125574
摘要
In this study, we utilized EDTA-modified zero-valent iron (EDTA-Fe0) to activate peracetic acid (PAA) for the removal of sulfamethazine (SMT) under neutral pH condition. We found that EDTA-Fe0 greatly enhanced the activation of PAA for SMT removal compared to the Fe0. Within 30 min, EDTA-Fe0/PAA system removed 97.0 % SMT, while Fe0/PAA system only removed 28.2 % SMT. Characterization and density functional theory (DFT) calculations confirmed that EDTA-Fe0 could enhance PAA activation thereby improving antibiotics removal. Radical quenching experiments and electron paramagnetic resonance spectroscopy (EPR) tests revealed that OH, R–O, and Fe (IV) all played a crucial role in SMT removal in the EDTA-Fe0/PAA system. Toxicity analysis demonstrated that the degradation of SMT by the EDTA-Fe0/PAA system was environmentally friendly. EDTA-Fe0/PAA system exhibited favorable pH applicability, required lesser amounts of Fe0 and PAA, and exhibited resilience against inorganic ions and humic acid. It also performed effectively antibiotic removal performance in natural freshwater environments. In conclusion, this study presents a promising technique for the removal of antibiotics.
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