Nitrated and parent PAHs in the surface water of Lake Taihu,China:Occurrence,distribution,source,and human health risk assessment  

作　　者：Jijie Kong Yuxuan Dai Mengshu Han Huan He Jiapeng Hu Junyi Zhang Junzhe Shi Qiming Xian Shaogui Yang Cheng Sun 

机构地区：[1]The State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210023,China [2]School of Environment,Nanjing Normal University,Nanjing 210023,China [3]College of Ecological and Resource Engineering,Fujian Provincial Key laboratory of Eco-Industrial Green Technology,Wuyi University,Wuyishan 354300,China [4]Wuxi Environmental Monitoring Centre,Wuxi 214121,China

出　　处：《Journal of Environmental Sciences》2021年第4期159-169,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41671493);the State Key Laboratory of Pollution Control and Resource Reuse Foundation(No.PCRRF17030);the National Major Project of the Science and Technology Ministry of China(No.2017ZX07202-004 and 2017X07301002-3)。

摘　　要：Nitrated polycyclic aromatic hydrocarbons(NPAHs)have toxic potentials that are higher than those of their corresponding parent polycyclic aromatic hydrocarbons(PAHs)and thus have received increasing attention in recent years.In this study,the occurrence,distribution,source,and human health risk assessment of 15 NPAHs and 16 PAHs were investigated in the surface water from 20 sampling sites of Lake Taihu during the dry,normal,and flood seasons of 2018.The PAH concentrations ranged from 255 to 7298 ng/L and the NPAH concentrations ranged from not-detected(ND)to 212 ng/L.Among the target analytes,2-nitrofluorene(2-n Flu)was the predominant NPAH,with a detection frequency ranging from 85%to 90%and a maximum concentration of 56.2 ng/L.The three-ringed and four-ringed NPAHs and PAHs comprised the majority of the detected compounds.In terms of seasonal variation,the highest levels of the NPAHs and PAHs were in the dry season and flood season,respectively.Diagnostic ratio analysis indicated that the prime source of NPAHs was direct combustion,whereas in the case of PAHs the contribution was predominantly from a mixed pattern including pollution from unburned petroleum and petroleum combustion.The human health risk of NPAHs and PAHs was evaluated using a lifetime carcinogenic risk assessment model.The carcinogenic risk level of the targets ranged from 2.09×10^(-7)to 5.75×10^(-5)and some surface water samples posed a potential health risk.

关 键 词：Nitrated polycyclic aromatic hydrocarbons Surface water OCCURRENCE Seasonal variation Human health risk assessment 

分 类 号：X524[环境科学与工程—环境工程] X820.4