亚南极潮间带生物体中PAHs组成特征及源解析

Distribution and Source Apportionment of PAHs in Intertidal Benthos in the Great Wall Bay,Antarctica

该研究在中国第27次南极科考（27th CHINARE）度夏期间（2009.11-2010.01）在长城湾潮间带采集了11种常见生物样品,通过GC-MS检测了生物体内的16种常见多环芳烃（polycyclic aromatic hydrocarbons,PAHs）的含量,根据检测数据分析亚南极地区海域潮间带生物群落中的PAHs在潮间带生物群落中的含量状况,初步探讨该地区PAHs的潜在来源。ΣPAHs为136.97~649.31（ng/g干重,下同）,萘、菲、蒽、芴等低环芳烃所有生物样品均检出包括萘、菲、蒽、芴等常见低环芳烃,苯并芘（a）、茚苯（1,2,3-cd）芘、二苯并（a,h）蒽、苯并（g,h,i）芘少数样品苯并芘（a）、茚苯（1,2,3-cd）芘、二苯并（a,h）蒽、苯并（g,h,i）芘未检出,ΣPAHs为136.97~649.31（ng/g干重,下同）,低环芳烃占57.45%~86.27%,Phe和Nap是最主要的2种PAHs。采用比值法分析该地区PAHs组成可知该地区PAHs主要来自柴油燃烧和柴油泄漏。对不同生物体内的16种多环芳烃组成比例进行比较,可以发现长城湾潮间带生物群落具有相似的PAHs组成比例。

Samples were collected during China National Antarctic Expedition（27th CHINARE） in austral summer（Nov.2009-Jan.2010） around the Great Wall Bay,including 11 kinds of biological samples. 16 common polycyclic aromatic hydrocarbons（PAHs）were detected by GC-MS. The sum of eleven PAH concentrations in all samples ranged from 136.97 to 649.31（ng/g,dry weight） with Phe and Nap as the predominating compounds. Low molecular weight PAHs（LMW PAHs）such as Nap,Flu,Phe,Ant were detected in the samples,while high molecular weight PAHs such as Ba P,In P,Db A,Bghi P were not detected in some samples. The LMW PAHs accounted for 57.45% ~86.27%,which indicated that PAHs in samples were originated from the combustion and spillage of diesel oil according to its characteristic ratios. The patterns of individual compounds in samples were compared,and intertidal benthos had similar pattern.