Enhanced Degradation of Decabromodiphenyl Ether via Synergetic Assisted Mechanochemical Process with Lithium Cobalt Oxide and Iron

• DOI: 10.3390/app132312924
• Publication Date: 2023-12-02T18:45:41Z
• Authors: Xiaoyi Lou; Yifan Sui; Qichao Zhang; Changling Fang; Yunyu Tang; Xuan Zhang; Guangxin Yang; Yongfu Shi; Dongmei Huang; Jie Guan; Yaoguang Guo
• Keywords: Decabromodiphenyl ether; Mechanochemistry

The removal of decabromodiphenyl ether (BDE 209), as a typical persistent organic pollutant (POP), is worldwide concern. Mechanochemical (MC) processes are promising methods to degrade environmental pollutants, most which use single grinding reagent. performance MC with co-milling agents still needs be further verified. In this study, an efficient treatment combined utilization lithium cobalt oxide (LiCoO2) and iron (Fe) reagents for BDE 209 degradation was investigated. synchronous action LiCoO2 Fe LiCoO2/Fe/Br molar ratio 1.5:1.67:1 ball-to-powder 100:1 led almost thorough-paced abatement debromination within 180 min using ball milling rotation speed 600 rpm. reduction in particle sizes the destruction crystal structure mixture powders increase time induced enhanced 209, characterized by scanning electron microscopy (SEM) X-ray diffraction (XRD). photoelectron spectroscopy (XPS) characterization showed that valence state Co converted from Co(III) Co(II), Fe(0) changed Fe(III) when treated process. This indicated reductive following oxidative debrominated products were integrated concerted way. It proved via treatment. full breakage C-Br C-O bonds confirmed Fourier transform-infrared spectrometry (FT-IR) spectra, possible pathway also proposed based on identified intermediate gas chromatography–mass (GC-MS). These obtained results combination toxic halogenated pollutants like 209.