九龙江龙岩段地表水中多环芳烃分布与污染源解析

用竹炭固相萃取恒波长同步荧光法测定了九龙江龙岩段水体中16种优控多环芳烃(PAHs)的含量。结果表明:龙岩市省控断面河水中2010年11月(冬季)多环芳烃的质量浓度为58.3×10-9~1 328.5×10-9g/L,平均为387.72×10-9g/L;2011年9月(秋季)水中总多环芳烃质量浓度为5.9×10-9~188.4×10-9g/L,平均为77.46×10-9g/L;7月(夏季)多环芳烃的质量浓度为16.7×10-9~1 203.3×10-9g/L,平均为475.05×10-9g/L,同国内外河流相比,九龙江龙岩段水体中PAHs污染较严重,且具有明显的季节分布特征。夏、秋、冬季九龙江龙岩段水体水中均以3~4环PAHs为主。污染来源分析表明,河水中PAHs主要来源于燃烧源。

Distribution and Related Source Identification of Polycyclic Aromatic Hydrocarbons in the LongyanSection of the Jiulong River

By the methods of bamboo charcoal solid phase extraction- constant wavelength synchronous fluorescence spectrometry detection, this paper measured the concentrations of 16 polycyclic aromatic hydrocarbons(PAHs) listed in the USEPA blacklist in the surface water in the Longyan section of the Jiulong River. The results showed that the PAHs contents in water of the provincial control section river were within the range of 58.3×10^-9-1 328.5×10^-9g/L with an average of 387.72×10^-9g/L in winter, within the range of 5.9×10^-9-188.4×10^-9g/L with an average of 77.46×10^-9g/L in autumn, within the range of 16.7×10^-9-1 203.3×10^-9g/L with an average of 475.05×10^-9g/L in summer, respectively. The surface water of Jiulong River was more seriously contaminated by PAHs, compared with that of other rivers in the world.The distribution characteristics of PAHs differed greatly with seasons. In each sampling station, the PAHs concentration in summer was high. The 3-ring and 4-ring PAHs were the most common components in Jiulong River,either in summer, autumn,or in winter. The source identification of PAHs inferred that combustion was the main PAHs source.