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| Type |
Oral Presentation |
| Area |
Current Trends in Environmental and Energy Chemistry |
| Room No. |
407호 |
| Time |
THU 09:30-: |
| Code |
ENVR.O-3 |
| Subject |
Citric acid-Assisted Sequential Redox Process of Tetrabromobisphenol A using Bimetallic Bi/Fe0 Nanoparticles |
| Authors |
이충섭, 장윤석*
POSTECH 환경공학부, Korea
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| Abstract |
Tetrabromobisphenol A (TBBPA) is the most abundantly applied brominated flame retardant. The widespread use of TBBPA and its incomplete removal have led to the release of large quantities of TBBPA into the environment.
This study presents a sequential redox process that uses bismuth-modified nanoscale zero-valent iron (Bi/Fe0) to completely degrade TBBPA. Citric acid (CA) was utilized to enhance the oxidation capability for degradation of TBBPA intermediates over Bi/Fe0 in the presence of oxygen, thereby completely degrading TBBPA.
In the first reduction process, TBBPA and partially debrominated intermediates, including tri-, di-, and mono-bromobisphenol A, were reductively degraded by Bi/Fe0. In the subsequent oxidation process, mono-bromobisphenol A and bisphenol A (BPA) were further oxidized by reactive oxygen species (ROS). CA could promote the bismuth-iron system to produce abundant ROS under oxic conditions due to its ligand function, which could react with Fe(III) to form a ligand complex (Fe(III)Citrate), with considerable production of Fe(II) and H2O2.
This study provides a new strategy for mineralization of many recalcitrant pollutants.
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119th General Meeting of the KCS