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To enhance the dispersivity of nano zero-valent iron (NZVI) used for removing 2,4-DCP from water, the surfaces of NZVI was modified with F-127 as an environmentally friendly organic stabilizer. Based on different mass ratio of F-NZVI particles sedimentation experiment and 2,4-DCP removal experiment,two-stage process (sedimentation removal and suspension removal) was found. The optimum mass ratio of F-127 to NZVI particles was found to be 2:1 and the maximum removal efficiency was 72.32%. The surface morphology, composition and crystal structure of the samples were analysed by using scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. Results show that F-127 significantly improved NZVI dispersibility and oxidation resistance. Final,the main factors of F-NZVI for the removal 2,4-DCP in water were studied to find the optimal 2,4-DCP removal condition, which were pH=5, 3 g•L-1 F-NZVI for 20 mg•L-1 of 2,4-DCP. © 2019, Science Press. All right reserved.
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Acta Scientiae Circumstantiae
ISSN: 0253-2468
Year: 2019
Issue: 8
Volume: 39
Page: 2559-2566
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30 Days PV: 0