期刊
JOURNAL OF SAUDI CHEMICAL SOCIETY
卷 23, 期 7, 页码 864-878出版社
ELSEVIER
DOI: 10.1016/j.jscs.2019.02.001
关键词
Nano zero-valent iron; Rectorite; Heterogeneous Fenton oxidation; P-chlorophenol degradation
资金
- Hefei University [17ZR08ZDA]
- Anhui Provincial Natural Science Key Foundation [1804a09020096, KJ2018A0561]
- National Special Item on Water Resource and Environment [2017ZX07603-003]
- Provincial Science and Technology Major Projects [16030801119]
- Anhui Provincial Natural Science Major Projects Foundation [KJ2017ZD46, KJ2016SD50]
- China Postdoctoral Science Foundation (CPS)
A zero-valent iron/rectorite nanocomposite (NZVI/rectorite) was developed as a heterogeneous H2O2 catalyst for P-chlorophenol degradation. The physicochemical properties of NZVI/rectorite were characterized by various techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive spectrometry, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis. Results showed that NZVI sphere nanoparticles were successfully loaded on the rectorite surface with less aggregation and good dispersion. Moreover, compared with acid-leached rectorite (30.91 m(2)/g), the NZVI/rectorite appeared to have larger surface area (50.75 m(2)/g). In addition, the effects of pH, reaction time, initial P-chlorophenol concentration, catalyst amount, and H2O2 dosage on the P-chlorophenol degradation were systematically investigated. Results showed that NZVI/rectorite presents better properties for the degradation and mineralization of P-chlorophenol compared with pristine NZVI due to the large surface area, low aggregation, and good dispersion of the former. The degradation mechanisms of P-chlorophenol by NZVI/rectorite were adsorption and reduction coupled with a Fenton-like reaction. Four successive runs of the stability and regeneration study also showed that the NZVI/rectorite were unchanged even after 100% of P-chlorophenol degradation ratio. This study has extended the application of NZVI/rectorite as environment function material for the removal of P-chlorophenol from the environment. (C) 2019 King Saud University. Production and hosting by Elsevier B.V.
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