Gamma radiolytic degradation of fluoranthene and monitoring of radiolytic products using GC-MS and HPLC
Gamma radiolytic degradation of fluoranthene and monitoring of radiolytic products using GC-MS and HPLC
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DOI：
10.1016/j.radphyschem.2007.11.007
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发表时间：
2008-06-01
影响因子：
2.9
通讯作者：
Qureshi, Rashid Nazir
中科院分区：
文献类型：
--
作者：
Butt, S. Bilal;Qureshi, Rashid Nazir
对不同条件下的伽马辐照脱除甲醇中的优先污染物荧蒽进行了优化。研究了氮气条件下不同剂量和剂量率对荧蒽降解的影响。用分光光度法对其初步的辐射降解效率进行了监测。采用高效液相色谱和GC-MS联用技术对降解规律进行了研究。结果表明，降解产物主要有四种，并通过高效液相色谱检测到。在最佳色谱条件下，采用不同的反相柱对降解产物进行分离。当剂量为2kGy时，剂量率为200Gyh时，荧蒽的降解率为80%，而剂量为370Gyh时降解率更高，且降解产物较少。还利用GC-MS分析了辐射降解的荧蒽，以检测各种降解产物。通过与安装的NIST质谱库进行比较，认为主要产物是含有有机化合物的碳氢化合物和甲氧基。(C)2007爱思唯尔有限公司。保留所有权利。
Removal of priority pollutant fluoranthene in methanol by gamma-irradiation under varied conditions has been optimized. The influence of applied dose and dose rate on the degradation of fluoranthene under nitrogen has been investigated. The preliminary radiolytic degradation efficiency has been monitored by spectrophotometry. HPLC and GC-MS have been used to study the nature of degradation pattern. It is found that four main degradation products are formed and detected by HPLC. Different reversed phase columns have been used for the separation of degraded products under optimum chromatographic conditions. For 2 kGy dose >= 80% fluoranthene has been degraded at dose rate 200Gy/h. However, a dose of 370Gy/h was more effective and it produces for less degradation products. Radiolytic degraded fluoranthene was also analyzed to detect various degradation products using GC-MS. It was proposed that major products were hydrocarbons and methoxy group containing organic compounds after comparing their mass spectra with the installed NIST mass spectral library. (C) 2007 Elsevier Ltd. All rights reserved.