Deng Jing, Wu Huadan, Wang Sujuan, Liu Yibing, Wang Hongyu
a School of Civil Engineering and Architecture , Zhejiang University of Technology , Hangzhou , People's Republic of China.
Environ Technol. 2019 May;40(12):1585-1591. doi: 10.1080/09593330.2018.1426642. Epub 2018 Feb 12.
The removal of sulfapyridine (SPY) by ferrate(VI) in aqueous solutions under a broad range of reaction conditions, including ferrate(VI) dosage, solution pH, natural organic matter and coexisting inorganic ions, was systematically investigated and the oxidation pathway of SPY by ferrate(VI) was deeply explored. Results showed that 500 µg/L of SPY was efficiently decomposed (86%) within 1 min by 5 mg/L ferrate(VI) at pH 5.6. The increment in ferrate(VI) dosage was surely favorable for SPY removal. The best SPY degradation was achieved at pH 5.6, under or above which the removal decreased. The introduction of inorganic ions in solutions retarded SPY removal. Ten oxidation intermediates were identified and the cleavages of C-S and S-N bonds might be the primary ways of SPY oxidation by ferrate(VI).
在包括高铁酸盐（VI）剂量、溶液pH值、天然有机物和共存无机离子在内的广泛反应条件下，系统研究了高铁酸盐（VI）对水溶液中磺胺吡啶（SPY）的去除效果，并深入探讨了高铁酸盐（VI）氧化SPY的途径。结果表明，在pH 5.6条件下，5 mg/L高铁酸盐（VI）可在1分钟内有效分解500 μg/L的SPY（86%）。高铁酸盐（VI）剂量的增加肯定有利于SPY的去除。在pH 5.6时SPY降解效果最佳，在此pH值以下或以上去除率均下降。溶液中无机离子的引入阻碍了SPY的去除。鉴定出了十种氧化中间体，C-S键和S-N键的断裂可能是高铁酸盐（VI）氧化SPY的主要方式。
