摘要
应用固相萃取富集法和气相色谱质谱联用(GC-MS)分析方法对西江水系源头至入海口的10个采样点地表水中多环芳烃的浓度进行了分析,并进行了健康风险评价。结果表明:各采样点水体中多环芳烃的总量在53.17~140.65 ng·L-1之间,其中致癌性多环芳烃的总量6.16~27.22 ng·L-1,占多环芳烃总量比例小于27%。就其组成而言,各采样点水体中多环芳烃以3环芳烃(42%~56%)为主,除5环芳烃外其他各环均有检出。该区域地表水中具有致癌性多环芳烃的健康危害风险度远大于非致癌多环芳烃所致的风险度,但均未超过国际辐射防护委员会(ICPR)推荐的最大可接受限值5.0×10-5a-1;其中苯并(a)蒽为致癌类PAHs中年平均风险最大的污染物。
10 surface water samples were collected from the source to the estuary of Xijiang River. Polycyclic aromatic hydrocarbons( PAHs) residues were assessed by solid phase extraction combined with gas chromatography mass spectrometry( GC / MS) analysis, and the health risk of PAHs in the surface water samples were assessed. The results showed that PAHs were detected with total concentration of 53. 17 ~ 140. 65 ng· L- 1. The concentrations of carcinogenic PAHs were 6. 16 ~ 27. 22 ng· L- 1, accounts for less than 27% of total PAHs. The PAHs were dominated by 3- components( 42%- 56%) in all sampling sites; other components were also detected except 5- components. Comparing with non- carcinogenic PAHs, the health risk of carcinogenic PAHs in water sources were at the higher level, but both of their health risk were below the highest acceptable risk level( 5. 0 × 10- 5a- 1) of International Commission on Radiological Protection( ICPR). Among the PAHs, the highest annual risk for carcinogenic PAHs was benz [a]anthracene.
出处
《人民珠江》
2016年第5期76-79,共4页
Pearl River
基金
国家自然科学基金青年基金项目(41303082)
关键词
多环芳烃
地表水
健康风险
西江
PAHs
surface water
health risk assessment
Xijiang River
