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目的研究珠江8个河口表层沉积物中7种典型环境内分泌干扰物(EDCs)的分布特征。方法 采集8个河口门的表层沉积物,采用加速溶剂萃取-衍生化-气相色谱质谱技术分析7种典型EDCs含量。结果 化工类化合物壬基酚(NP)、双酚A(BPA)、四羟基苯甲酸丙酯(PP)和辛基酚(OP),甾醇类自然雌激素雌二醇(E2)、雌酮(E1)和合成雌激素乙炔雌二醇(EE2)均有检出。除EE2的检出率为88.2%,其余EDCs的检出率为100%,其浓度范围(ng/g dw)从大到小依次为:NP(565.28~812.6)>BPA(42.55~248.25)>PP(93.44~109.96)>OP(3.62~11.52)、E1(14.13~23.13)、E2(6.86~15.42)、EE2(ND~23.45)。结论 4种化工类EDCs和EE2在8个河口中的分布特征类似,东四河口的浓度累积量明显高于西四河口,且其中的虎门河口浓度较高。在各河口中EDCs浓度表现出从河道至河口外方向随水流逐渐降低。E1和E2在除鸡啼门外的其他7个河口中的不同采样点处的浓度变化不大,鸡啼门中有可能的点污染源。
Objective To study the distribution characteristics of seven typical environmental endocrine disrupting chemicals (EDCs) in the surface sediments of 8 estuaries in the Pearl River. Methods The surface sediments of eight estuarine gates were collected and the contents of seven typical EDCs were analyzed by accelerated solvent extraction - derivatization - gas chromatography mass spectrometry. Results The chemical compounds NP, BPA, PP and octylphenol (OP), steroid natural estrogen estradiol (E2) and estrone E1) and synthetic estrogen ethinyl estradiol (EE2) were detected. In addition to the detection rate of EE2 was 88.2%, the detection rate of the remaining EDCs was 100%, the order of concentration (ng / g dw) was: NP (565.28 ~ 812.6)> BPA (42.55 ~ 248.25)> PP (93.44 ~ 109.96)> OP (3.62 ~ 11.52), E1 (14.13 ~ 23.13), E2 (6.86 ~ 15.42) and EE2 (ND ~ 23.45). Conclusion The distribution characteristics of four kinds of chemical EDCs and EE2 in eight estuaries are similar. The concentration cumulation of Dongsi estuary is obviously higher than that of Xisihe estuary, and the concentration of the two is higher in Humen estuary. The concentration of EDCs in each estuary showed a gradual decrease with water flow from the river to the estuary. The concentrations of E1 and E2 at different sampling points in the other seven estuaries except Jitiumen did not change much, and there was a possible point source pollution in Jitianmen.