Advanced UV/H₂O₂ oxidation of deca-bromo diphenyl ether in sediments

Sci Total Environ. 2014 May 1:479-480:17-20. doi: 10.1016/j.scitotenv.2014.01.091. Epub 2014 Feb 15.

Abstract

Removal of BDE-209 from contaminated sediments by UV/H2O2 treatment was investigated under different reaction conditions (different UV irradiance and H2O2 concentrations). After 10h of UV/H2O2 treatment, 90% of BDE-209 was removed with a half-life time (t1/2) of 3.5h and a kinetic constant (k) of 0.22 h(-1). Possible formation of OH-PBDEs and debrominated polybromodiphenyl ethers was investigated by GC-MS and LC-MS/MS. None of the abovementioned BDE-209 by-products was found after 2.5, 5.5 and 10h of UV/H2O2 treatment. Toxicity experiments carried out with zebrafish embryos exposed to the sediment before and after the UV/H2O2 treatment did not show any morphological or behavioural alterations, suggesting that no putative debrominated or oxidation products were originated by the treatment in concentrations high enough to elicit significant toxic effects in zebrafish embryos.

Keywords: Advanced oxidation processes; BDE-209 removal; Remediation technologies; Sediment remediation.

Publication types

  • Evaluation Study

MeSH terms

  • Animals
  • Embryo, Nonmammalian / drug effects
  • Environmental Restoration and Remediation / methods*
  • Flame Retardants / analysis
  • Flame Retardants / toxicity
  • Geologic Sediments / chemistry*
  • Halogenated Diphenyl Ethers / analysis
  • Halogenated Diphenyl Ethers / chemistry*
  • Halogenated Diphenyl Ethers / toxicity
  • Hydrogen Peroxide / chemistry*
  • Oxidation-Reduction
  • Toxicity Tests
  • Ultraviolet Rays*
  • Water Pollutants, Chemical / analysis
  • Water Pollutants, Chemical / chemistry*
  • Water Pollutants, Chemical / toxicity
  • Zebrafish / embryology

Substances

  • Flame Retardants
  • Halogenated Diphenyl Ethers
  • Water Pollutants, Chemical
  • Hydrogen Peroxide
  • decabromobiphenyl ether