A Study on the Composition of Polycyclic Aromatic Hydrocarbons,Sediments and Wet Precipitation in Huguangyan Maar Lake
This study has analyzed the abundance distribution of 16 priority controlled polycyclic aromatic hydrocarbons(PAHs)compounds in lake surface water,sediments and wet precipitation of Huguangyan Maar Lake by using gas chromatog-raphy-mass spectrometry(GC-MS).The results show that:(1)The total concentrations(Σ PAHs)of the 15 preferred control PAHs detected in wet precipitation and surface lake water were 244.78 ng/L and 117.31 ng/L,respectively;The total concen-tration(Σ PAHs)of 16 preferred PAHs detected in the sediment was 304.42 ng/g.The proportion of 2-3 ring PAHs decreased sequentially from wet precipitation to surface lake water to sediment,and the proportion of 4-6 ring PAHs increased sequen-tially.(2)The content of Chr,BbF,BkF,BaP and IcdP carcinogenic monomeric PAHs in wet precipitation exceeds the stan-dard threshold values,and BaA is slightly below the standard threshold value;The content of BaA,BbF,BkF and BaP etc.specified carcinogenic PAHs in the surface lake water of Huguangyan is lower than the standard threshold value,and the con-tent of Chr and IcdP is slightly higher than the threshold value specified in the standard.(3)The content of Nap,Acy,Ace,Flu,Phe,Ant,Fla,Pyr,BaA,Chr,BaP,and DahA compounds in the sediments is well below the sediment quality reference value of ERL,and there is no ecological risk.The ecological risks of BbF,BkF,InP and BghiP,for which safety threshold have not been specified,need further attention.Overall,the ecological risk of 16 PAHs in the lake surface water and sediments of the Huguangyan Maaar Lake were low.
wet precipitationsurface watersedimentsPAHsHuguangyan Maar Lake
NETL
NSTL
万方数据
