Abstract：
In this work, the magnetic nanocomposite Fe@SiC was prepared by a hydrothermal method and determined by SEM, XRD, XPS, FTIR and VNA. Fe3O4 particles were loaded onto SiC with great success, and the synthesized composites had favorable microwave absorption properties. Fe@SiC was used to activate persulfate in a microwave field for the degradation of BDE209 in soil. Specifically, the synergistic interaction between microwaves and Fe@SiC showed excellent catalytic performance in activating PS to degrade BDE209 (90.1% BDE209 degradation in 15 min). The presence of •OH, O2•- and 1O2 was demonstrated based on quench trapping and EPR experiments. LC‒MS was applied to determine the intermediates and propose the possible degradation pathway for BDE209 in the MW/Fe@SiC/PS system, and it was found that BDE209 produced almost no lower brominated diphenyl ethers. Therefore, the toxicity of BDE209 was found to be reduced using toxicity assessment software. Overall, this work provides an effective approach for the degradation of BDE209 in environmental remediation.
摘要：
在这项工作中,通过水热法制备了磁性纳米复合材料Fe@SiC,XRD,XPS,FTIR和VNA。Fe3O4颗粒负载到SiC上取得了巨大的成功,合成的复合材料具有良好的微波吸收性能。Fe@SiC用于在微波场中活化过硫酸盐降解土壤中的BDE209。具体来说,微波与Fe@SiC的协同作用在活化PS降解BDE209方面表现出优异的催化性能(15min内降解90.1%BDE209)。•OH的存在，基于骤冷捕集和EPR实验证明了O2·-和1O2。LC-MS用于确定中间体，并提出了BDE209在MW/Fe@SiC/PS系统中的可能降解途径，发现BDE209几乎不产生低溴二苯醚。因此,使用毒性评估软件发现BDE209的毒性降低.总的来说,本工作为BDE209在环境修复中的降解提供了一种有效的途径。
