Occurrence, partition behavior, source and ecological risk assessment of nitro-PAHs in the sediment and water of Taige Canal, China  

作　　者：Jijie Kong Tao Ma Xiaoyu Cao Weidi Li Fengxiao Zhu Huan He Cheng Sun Shaogui Yang Shiyin Li Qiming Xian 

机构地区：[1]School of Environment,Nanjing Normal University,Nanjing 210023,China [2]School of Geography,Nanjing Normal University,Nanjing 210023,China [3]The State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210023,China [4]Fujian Provincial Key laboratory of Eco-Industrial Green Technology,College of Ecological and Resource Engineering,Wuyi University,Wuyishan 354300,China [5]Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment,Nanjing 210042,China

出　　处：《Journal of Environmental Sciences》2023年第2期782-793,共12页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 41671493);the Natural Science Foundation of Jiangsu Province (No. BK20191372);the National Major Project of the Science and Technology Ministry of China (No. 2017ZX07202-004)

摘　　要：Nitrated polycyclic aromatic hydrocarbons(NPAHs)are widespread organic pollutants that possess carcinogenic and mutagenic properties,so they may pose a risk to the environment and human health.In this study,the concentrations of 15 NPAHs and 16 polycyclic aromatic hydrocarbons(PAHs)in 30 surface water samples and 26 sediment samples were measured in 2018 from the Taige Canal,one of the main rivers flowing into Taihu Lake,China.The total NPAH concentrations in water and sediment ranged from 14.7 to 235 ng/L and 22.9 to 96.5 ng/g dw,respectively.9-nitrophenanthrene(nd–76.3 ng/L)was the dominant compound in surface water,while 2+3-nitrofluoranthene(1.73–18.1 ng/g dw)dominated in sediment.Among PAHs,concentration ranging from 1,097 to 2,981 ng/L and 1,089 to 4,489 ng/g dw in surface water and sediment,respectively.There was a strong positive correlation between the log octanol-water partition coefficient(Kow)and log sediment-water partition coefficient due to hydrophobic interaction.The fugacity fraction value increased with the decrease of log Kow,and chrysene was transferred from water into sediment.The residual NPAHs in surface water and sediment of the Taige Canal have partial correlation.Diesel engine and coal combustion emissions were probably the principal sources of NPAHs in surface water and sediment.The results of ecological risk assessment showed that some NPAHs inwater(e.g,1-nitropyrene and 6-nitrochrysene)and sediment(e.g.,2-nitrobiphenyl,5-nitroacenaphthene,9-nitrophenanthrene and 2+3-nitrofluoranthene)had moderate ecological risks,which should be of concern.

关 键 词：Nitrated polycyclic aromatic hydrocarbons(NPAHs) OCCURRENCE Partition behavior Source apportionment Ecological risk assessment 

分 类 号：X52[环境科学与工程—环境工程] X826