Degradation of decabromodiphenyl ether by nano zero-valent iron immobilized in mesoporous silica microspheres.
作者： Xinhong Qiu , Zhanqiang Fang , Bin Liang , Fenglong Gu , Zhencheng Xu
DOI: 10.1016/J.JHAZMAT.2011.07.024
关键词:
摘要: Abstract The agglomeration of nanoparticles reduces the surface area and reactivity nano zero-valent iron (NZVI). In this paper, highly dispersive reactive NZVI immobilized in mesoporous silica microspheres covered with FeOOH was synthesized to form (SiO2@FeOOH@Fe). characteristics SiO2@FeOOH@Fe were analyzed by transmission electron microscopy, Fourier transform infrared spectroscopy simultaneous thermal analysis, X-ray photoelectron spectroscopy, Brunnaer–Emmett–Teller analysis. mean particle size 450 nm, its specific 383.477 m2 g−1. degradation dcabromodiphenyl ether (BDE209) followed pseudo-first-order kinetics, observed reaction rate constant could be improved increasing dosage decreasing initial BDE209 concentration. stability longevity Fe evaluated repeatedly renewing solution reactor. stable within 10 cycles. Agglomeration-resistance magnetic separation also performed. dispersion after one-month storage good performance indicated that has potential efficiently applied environmental remediation.
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