Department of Environmental Chemistry, IDAEA, CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain; Department of Chemical Engineering, University of Barcelona, Marti i Franques, 1, 08082 Barcelona, Spain.
Department of Chemical Engineering, University of Barcelona, Marti i Franques, 1, 08082 Barcelona, Spain.
Sci Total Environ. 2014 May 1;479-480:17-20. doi: 10.1016/j.scitotenv.2014.01.091. Epub 2014 Feb 15.
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.
采用不同的反应条件（不同的紫外辐照度和 H2O2 浓度）研究了 UV/H2O2 处理对污染沉积物中 BDE-209 的去除效果。经过 10h 的 UV/H2O2 处理，90%的 BDE-209 被去除，半衰期（t1/2）为 3.5h，反应速率常数（k）为 0.22h(-1)。通过 GC-MS 和 LC-MS/MS 研究了可能形成的 OH-PBDEs 和脱溴多溴联苯醚。经过 2.5、5.5 和 10h 的 UV/H2O2 处理后，均未发现上述 BDE-209 副产物。用斑马鱼胚胎进行的毒性实验表明，暴露于 UV/H2O2 处理前后的沉积物中没有出现形态或行为改变，这表明在足以引起斑马鱼胚胎显著毒性效应的浓度下，处理过程中没有产生潜在的脱溴或氧化产物。
