摘要:
本文通过特制的溢油风化模拟装置对船舶燃料油进行了风化实验,采用气-质联用仪(GC-MS)对风化样品中的多环芳烃进行了检测,通过谱图和特征分析,研究了船舶燃料油中主要多环芳烃的风化规律.结果表明:船舶燃料油中主要多环芳烃组分含量由高到低依次为萘类菲类二苯并噻吩类芴类(艹屈)类,在每类同系物中,带支链的同系物含量基本上高于未带支链的多环芳烃母体;风化时间明显影响着船舶燃料油中多环芳烃组分的相对含量,在5组多环芳烃中,萘系列组分风化速度最快,其次为芴系列组分,菲、二苯并噻吩和(艹屈)系列三组分不易风化;风化1周内,船舶燃料油中多环芳烃同分异构体C1D(m/z=198)和C1P(m/z=192)与特征参数比值C2D/C2P、C3D/C3、∑P/(∑D+∑P)基本保持稳定.风化2周内,多环芳烃同分异构体C1D(m/z=198)与C1P(m/z=192)中分布相对靠前的组分更易风化,特征参数比值C2D/C2P明显下降,C3D/C3P与∑P/(∑D+∑P)仍然保持稳定.
Abstract:
In this paper,ship fuel oil was weathered in 14 days through a specially designed weathering simulator. The weathered samples were detected by GC-MS.Then analyzed the spectrum to study the weathering law of the PAHs in ship fuel oil. Results demonstrated that:the contents of PAHs descend in the order of naphthalenes phenanthrenesdibenzothiophenesfluoreneschrysenes series,alkylated PAHs content higher than the mother PAHs. In five PAHs series,naphthalenes weathered fastest,followed by fluorens; DBTs,phenanthrenes and chrysenes weathered slowly on the other hand.The ratios of C2D/C2P,C3D/C3P,∑P/(∑D+∑P)and the relative abundances of the isomers in C1D(m/z=198)and C1P(m/z=192)remained stable in one week; after two weeks' weathering,the isomers distributed in front were easier to weathering; the ratio of C2D/C2P decreased obviously,C3D/C3P and ∑P/(∑D+∑P)remained stable.
点击查看大图
下载:
