Rapid debromination of tetrabromobisphenol A by Cu/Fe bimetallic nanoparticles in water, its mechanisms, and genotoxicity after treatments

Chin-Shun Kuo; Dave Ta Fu Kuo; Andy Chang; Kai Wang; Pei-Hsin Chou; Yang-Hsin Shih

doi:10.1016/j.jhazmat.2022.128630

Rapid debromination of tetrabromobisphenol A by Cu/Fe bimetallic nanoparticles in water, its mechanisms, and genotoxicity after treatments

J Hazard Mater. 2022 Jun 15:432:128630. doi: 10.1016/j.jhazmat.2022.128630. Epub 2022 Mar 5.

Authors

Chin-Shun Kuo¹, Dave Ta Fu Kuo², Andy Chang³, Kai Wang¹, Pei-Hsin Chou⁴, Yang-Hsin Shih⁵

Affiliations

¹ Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
² Civil and Architectural Engineering, City University of Hong Kong, Hong Kong, China; Kuo Research & Consulting, Toronto, Canada.
³ Air Permit Division, Texas Commission on Environmental Quality, United States.
⁴ Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan.
⁵ Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan. Electronic address: yhs@ntu.edu.tw.

PMID: 35299103
DOI: 10.1016/j.jhazmat.2022.128630

Abstract

Tetrabromobisphenol A (TBBPA), a widely used brominated flame retardants, has been detected in various environmental matrices and is known to cause various adverse effects on human bodies. This study examined the feasibility and effectiveness of remediating TBBPA using Cu/Fe bimetallic nanoparticles (Cu/Fe BNPs) at various environmental and operational conditions. In general, TBBPA removal rate and debromination efficiency increased with higher Cu doping, higher Cu/Fe BNPs loading, higher temperature, and lower pH. At optimal conditions, TBBPA was completed removed at a rate constant > 0.2 min^-1 where over 90% TBBPA was transformed to BPA within 30 min. The activation energy was found to be 35.6 kJ/mol, indicating that TBBPA was predominantly removed via surface-controlled reactions. Under pH 3-7 and ≥ 25 °C, debromination was the dominant removal mechanism compared to adsorption. The complete debromination pathway and the time-evolution of intermediates byproducts at different pHs were also presented. Cu/Fe BNPs can be reused for more than 6 times with performance constancy. Genotoxic tests showed that the treated solution did not find a significant hazardous potential. The byproducts can be further degraded by additional H₂O₂ through Fenton reaction. These results demonstrated the efficacy of Cu/Fe BNPs for treating TBBPA and its potential for degrading other halogenated organic compounds.

Keywords: Activation energy; Cu/Fe bimetallic nanoparticles (Cu/Fe BNPs); Debromination; Genotoxicity; PH effects; Tetrabromobisphenol A (TBBPA).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

DNA Damage
Humans
Hydrogen Peroxide
Iron / chemistry
Nanoparticles*
Polybrominated Biphenyls* / chemistry
Water

Substances

Polybrominated Biphenyls
Water
Hydrogen Peroxide
Iron
tetrabromobisphenol A