Environmental Pollution ( IF 7.6 ) Pub Date : 2019-06-26 , DOI: 10.1016/j.envpol.2019.06.094 Xiaozhong Gao , Peng Huang , Qinghui Huang , Kaifeng Rao , Zhibo Lu , Yiping Xu , Geir Wing Gabrielsen , Ingeborg Hallanger , Mei Ma , Zijian Wang
Organic pollutants in the Arctic seas have been of concern to many researchers; however, the vast dynamic marine water poses challenges to their comprehensive monitoring within appropriate spatial and temporal scales in the Arctic. In this study, on-board passive sampling of organic pollutants using a self-developed device coupled with triolein-embedded cellulose acetate membranes (TECAMs) was performed during an Arctic cruise. The TECAM extracts were used for target analysis of organophosphorus flame retardants (PFRs), and non-target screening of persistent, bioaccumulative, and toxic (PBT) contaminants using two-dimensional gas chromatography with time-of-flight mass spectrometry (GC × GC-TOFMS). Sixteen chemicals were screened out as PBT contaminants from the 1500 features in the non-target analysis and further identified. Consequently, two chlorinated PFRs (tris(chloroisopropyl)phosphate and tris(1,3-dichloroisopropyl)phosphate) and four PBT contaminants (4-tert-butylphenol, 2-isopropylnaphthalene, 1,1,3-trimethyl-3-phenylindane, and 1-phenylnonan-1-one) were accurately quantified, with the temporally and spatially integrated concentrations ranging from 0.83 ng L−1 to 20.82 ng L−1 in the seawaters. Sources and transport of the contaminants were studied, and ocean current transport (West Spitsbergen Current, WSC) and local sources (human settlement, Arctic oil exploitation, and petroleum fuel emissions) were found to contribute to the presence of the different contaminants. Finally, annual transport fluxes of the contaminants from the North Atlantic to the Arctic Ocean by WSC were estimated, and the results indicate that their hazard to the Arctic should be concerned.
中文翻译:
北极海水中的有机磷阻燃剂和持久性,生物蓄积性和有毒污染物:机载被动采样以及目标和非目标分析
北极海洋中的有机污染物一直是许多研究人员关注的问题。然而,巨大的动态海水对北极地区在适当的时空范围内的全面监测提出了挑战。在这项研究中,在北极航行期间,使用自行开发的装置与三油精包埋的醋酸纤维素膜(TECAM)结合,对机载有机污染物进行了被动采样。TECAM提取物用于有机磷阻燃剂(PFR)的目标分析,以及使用飞行时间质谱(GC×GC)的二维气相色谱法对持久性,生物蓄积性和有毒(PBT)污染物进行非目标筛查-TOFMS)。从非目标分析的1500个特征中筛选出16种化学物质作为PBT污染物,并进行进一步鉴定。所以,准确定量了叔丁基苯酚,2-异丙基萘,1,1,3-三甲基-3-苯基茚满和1-苯基壬基-1-酮,其时空积分浓度范围为0.83 ng L -1至20.82 ng海水中的L -1。对污染物的来源和运输进行了研究,发现洋流运输(西斯匹次卑尔根海流,WSC)和当地来源(人类住区,北极石油开采和石油燃料排放)都对不同污染物的存在做出了贡献。最后,通过WSC估算了污染物从北大西洋到北冰洋的年运输通量,结果表明应考虑其对北极的危害。