科研动态
毛茜慧同学（袁守军研究组）在国际刊物发表论文
我系袁守军副教授研究组研三毛茜慧同学题为“Chlorination of parabens: reaction kinetics and transformation product identification” 的论文被SCI期刊 《Environmental Science and Pollution Research》接收。摘要如下：
The reactivity and fate of parabens during chlorination were investigated in this work. Chlorination kinetics of methylparaben (MeP), ethylparaben (EtP), propylparaben (PrP), and butylparaben (BuP) were studied in the pH range of 4.0 to 11.0 at 25 ± 1 °C. Apparent rate constants (k app) of 9.65 × 10-3 M-0.614·s-1, 1.77 × 10-2 M-1.019·s-1, 2.98 × 10-2 M-0.851·s-1, and 1.76 × 10-2 M-0.860·s-1 for MeP, EtP, PrP, and BuP, respectively, were obtained at pH 7.0. The rate constants depended on the solution pH, temperature, and NH4 + concentration. The maximum k app was obtained at pH 8.0, and the minimum value was obtained at pH 11.0. The reaction rate constants increased with increasing temperature. When NH4 + was added to the solution, the reaction of parabens was inhibited due to the rapid formation of chloramines. Two main transformation products, 3-chloro-parabens and 3,5-dichloro-parabens, were identified by GC-MS and LCMS-IT-TOF, and a reaction pathway was proposed. Dichlorinated parabens accumulated in solution, which is a threat to human health and the aqueous environment.