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采用GC-FID分析测定了南黄海(SYS)表层沉积物样品中的4种邻苯二甲酸酯(PAEs),探讨了影响该类污染物分布的因素,并对其潜在生态危害做出初步判断。研究海域4种PAEs总含量在(311.4~6 156.5)×10-9之间,平均浓度为1 636.3×10-9,高值区主要分布在南黄海中部。二丁酯(DBP)检出浓度最高,介于(159.7~5 499.3)×10-9,二正辛酯(DnOP)浓度最低,为(2.2~81.1)×10-9,二甲酯(DMP)和二乙酯(DEP)含量平均值分别为159.5×10-9和74.2×10-9。4种PAEs浓度高值区同样主要集中在南黄海中部,不同组分之间的分布规律稍有差异。PAEs本身的性质、沉积物的特性、水动力条件以及周边环境都会影响PAEs的分布,其中沉积物中TOC的含量是影响其分布的重要因素之一。生态风险评价结果表明,大部分站位只有DBP超出警戒值,但低于其风险评估低值(ERL),初步判断南黄海海域目前这4种PAEs的生态危害较小。
Four kinds of phthalate esters (PAEs) in surface sediment samples of the South Yellow Sea (SYS) were determined by GC-FID analysis. The factors that affected the distribution of these pollutants were discussed and the potential ecological risk was preliminary judgment. The total contents of four PAEs in the study area ranged from (311.4 to 6 156.5) × 10-9 with an average concentration of 1 636.3 × 10-9. The high value areas were mainly distributed in the central part of the southern Yellow Sea. The concentration of dibutyl ester (DBP) was highest (159.7-5499.3) × 10-9, and the lowest concentration of DnOP was (2.2 ~ 81.1) × 10-9. The content of DMP ) And diethyl ether (DEP) were 159.5 × 10-9 and 74.2 × 10-9, respectively. Most of PAEs in high concentrations of PAEs also concentrated in the central part of the southern Yellow Sea, and the distribution of different components was slightly difference. The nature of PAEs, sediment characteristics, hydrodynamic conditions and the surrounding environment all affect the distribution of PAEs. The content of TOC in sediments is one of the important factors affecting the distribution of PAEs. The results of ecological risk assessment showed that only the DBP exceeded the warning level at most of the stations but was lower than the low risk assessment (ERL), and the ecological damage of the four PAEs in the southern Yellow Sea was initially judged to be minor.