论文部分内容阅读
采用气相色谱-电子俘获监测(GC-ECD)技术分析了钦州湾26个表层沉积物样品中35种多氯联苯(PCBs)同系物的含量,探讨了其在沉积物中的含量水平、组分特征及生态风险。结果表明:∑PCBs在钦州湾表层沉积物中的含量范围为(0.23~6.26)×10-9(dw),均值为1.07×10-9,最高浓度出现在钦州港(QZG)。总体上,茅尾海PCBs均值高于钦州外湾;东海岸高于西岸。钦州湾区域的PCBs以四氯联苯为主要同族物。与国内外其他海域相比,钦州湾表层沉积物中PCBs污染处于较低水平,风险评价结果表明钦州湾沉积物中多氯联苯属于低生态风险水平。
The contents of 35 PCBs congeners in 26 sediment samples in Qinzhou Bay were analyzed by gas chromatography-electron capture (GC-ECD) Sub-characteristics and ecological risk. The results showed that the content of ΣPCBs in Qinzhou Bay surface sediment ranged from (0.23 ~ 6.26) × 10-9 (dw) with a mean of 1.07 × 10-9, with the highest concentration in QZG. In general, the mean Mawei sea PCBs Qinzhou Outer Bay higher than the East Coast higher than the West Bank. PCBs in the Qinzhou Bay area use tetrachlorobiphenyl as the main congener. Compared with other sea areas at home and abroad, PCBs pollution in surface sediments of Qinzhou Bay is at a low level. The risk assessment shows that PCBs in Qinzhou Bay sediments are of low ecological risk.