Polycyclic aromatic hydrocarbons in benthos of the northern Bering Sea Shelf and Chukchi Sea Shelf  

作　　者：Yuxin Ma Yurong Sun Yunkai Li Hongyuan Zheng Wenying Mi 

机构地区：[1]School of Oceanography,Shanghai Jiao Tong University,Shanghai 200030,China [2]College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China [3]State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China [4]MINJIE Institute of Environmental Science and Health Research,Max-Plank Street 2,Geesthacht 21502,Germany

出　　处：《Journal of Environmental Sciences》2020年第11期194-199,共6页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.41506215,41976211);Shanghai Pujiang Talent Program(No.19PJ1404200)。

摘　　要：Eighteen polycyclic aromatic hydrocarbons(PAHs)were detected in benthos collected onboard the‘Snow Dragon’in the Northern Bering Sea Shelf and Chukchi Sea Shelf during the 6 th Chinese National Arctic Research Expedition(CHINARE 2014).18 PAHs for all biota samples ranged from 34.2 to 128.1 ng/g dry weight(dw),with the highest concentration observed in fish muscle(Boreogadus saida)samples close to St.Lawrence Island.The PAH composition pattern was dominated by the presence of lighter 3 ring(57%)and 2 ring(28%)PAHs,indicating oil-related or petrogenic sources as important origins of PAH contamination.Concentrations of alkyl-PAHs(1-methylnaphthalene and 2-methylnaphthalene)were lower than their parent PAH(naphthalene)in all biological tissue,and their percentage also decreased significantly(p<0.05)compared with those in the corresponding sediment.There were no significant relationships between PAH concentrations and trophic levels,which is possibly due to the combined results of the complex benthic foodweb in the subarctic/Arctic shelf region,as well as a low assimilation/effective metabolism for PAHs.According to toxic potency evaluation results from TCDD toxic equivalents(TEQs)and Ba P-equivalent(Ba PE)values,whelk(Neptunea heros)and starfish(Ctenodiscus crispatus)are two macroinvertebrate species showing relatively higher dioxin-like toxicity and carcinogenic risk.

关 键 词：Polycyclic aromatic hydrocarbons Arctic shelf BENTHOS Toxic potency BIOACCUMULATION 

分 类 号：X55[环境科学与工程—环境工程]