Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
Environ Technol. 2012 Sep;33(16-18):1945-51. doi: 10.1080/09593330.2012.655314.
Decomposition of hexachlorobenzene (HCB) on high surface area y-alumina was comprehensively studied using in situ Fourier transform infrared spectroscopy, gas chromatography/mass spectrometry (GC-MS) and ion chromatography. Monitoring of the temperature-dependent decomposition by Fourier transform infrared spectroscopy showed that HCB decomposed as the temperature increased and phenolate species and other decomposition products formed. Pentachlorophenol (PeCP) and pentachlorobenzene were identified as the main decomposition products by GC-MS, and the time dependence of the formation of PeCP and pentachlorobenzene suggested that PeCP was the main intermediate. A trace analytical method based on derivatization and GC-MS revealed the presence of 3,4,5,6-tetrachloro-1,2-benzenediol and tetrachloro-hydroquinone. A small amount of inorganic chlorine ions produced by dechlorination of HCB was detected by ion chromatography. PeCP was the main intermediate and was transformed to 3,4,5,6-tetrachloro-1,2-benzenediol and tetrachloro-hydroquinone on the alumina surface. These compounds then decomposed to small molecules via cracking of their aromatic rings.
采用原位傅里叶变换红外光谱、气相色谱/质谱联用（GC-MS）和离子色谱法，综合研究了六氯苯（HCB）在高比表面积γ-氧化铝上的分解。傅里叶变换红外光谱监测表明，随着温度的升高，HCB 分解，生成酚盐物种和其他分解产物。GC-MS 鉴定出五氯苯酚（PeCP）和五氯苯为主要分解产物，PeCP 和五氯苯形成的时间依赖性表明 PeCP 是主要的中间产物。衍生化和 GC-MS 痕量分析方法表明存在 3,4,5,6-四氯-1,2-苯二酚和四氯对苯二酚。离子色谱法检测到 HCB 脱氯产生的少量无机氯离子。PeCP 是主要的中间产物，在氧化铝表面转化为 3,4,5,6-四氯-1,2-苯二酚和四氯对苯二酚。这些化合物随后通过芳环的断裂分解为小分子。
