Journal
CHEMICAL ENGINEERING JOURNAL
Volume 309, Issue -, Pages 717-724Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.10.075
Keywords
Fe-0/OMt; Tetrabromobisphenol A; Bisphenol A; Degradation; Pathway
Categories
Funding
- National Key Scientific and Technological Project Water Pollution Control and Treatment [2012ZX07206002]
- Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology [2016K0008]
- Environmental and Pollution Control Technology
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Organo-montmorillonite supported zero-valent iron nanoparticles (Fe-0/OMt) with well-dispersion and higher specific surface area were synthesized for the degradation of tetrabromobisphenol A (TBBPA) and biSphenol A (BPA) in aqueous solution. X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), Energy-Dispersive X-ray elemental mapping, and X-ray photoelectron microscopy (XPS) were used to characterize the composition and microstructures of Fe-0/OMt. Interestingly, nanoscale zero-valent iron (Fe-0) core with a uniform iron oxide shell are formed and well dispersed on the organo-montmorillonite supports. After systematical optimization of treatment conditions, Fe-0/OMt (0.1 g/L) with sparging O-3 (concentration of 4 mg/L) demonstrated excellent degradation efficiency for TBBPA and BPA (98.6% and 94.7%, respectively) with the initial concentration of 10 mg/L. Notably, in the aforementioned oxic conditions, bromide ions, ferrous ion, and hydroxyl radicals were detected during the progressive degradation of the TBBPA and BPA, suggesting that TBBPA was debrominated as the primary step then completely mineralized by oxidative process. Finally, combined with the analysis of degradation products identified by LC-MS, pathways of TBBPA and BPA over Fe-0/OMt were proposed. These results revealed that a Fe-0/OMt based on advanced oxidation technology is of great potential for remediating TBBPA and BPA in aqueous environment. (C) 2016 Elsevier B.V. All rights reserved.
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