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利用气相色谱/质谱方法对青岛近海表层沉积物中多环芳烃(PAHs)、多氯联苯(PCBs)和有机氯农药(OCPs)进行了测定,并分析了PAHs、PCBs和OCPs的分布特征.结果表明,PAHs、PCBs和OCPs的均值分别为684.80、6.87和13.52ng·g-1,含量变化均呈近岸高、远岸低的分布规律.燃料的高温燃烧排放对本研究海域沉积物中PAHs有较大贡献;PCBs主要来源于工业及生活排放,但已受到控制;沉积物中HCHs存在工业和农业双重污染源输入,DDT主要是由于历史上使用农药造成,且在表层沉积物中受到好氧微生物降解.与国内外同类研究结果相比,调查海域沉积物中PAHs、PCBs和OCPs的污染程度及生态风险均处于较低水平.
Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in surface sediment of Qingdao coastal area were determined by gas chromatography / mass spectrometry. The distribution characteristics of PAHs, PCBs and OCPs were also analyzed. The results showed that the average values of PAHs, PCBs and OCPs were 684.80, 6.87 and 13.52 ng · g-1, respectively, and the contents of PAHs, PCBs and OCPs were both high in nearshore and low in distant shores.The PAHs, PCBs mainly come from industrial and domestic emissions, but have been controlled. HCHs in sediments have dual sources of industrial and agricultural inputs. DDT is mainly caused by the use of pesticides in history and is subject to aerobic Microbial degradation.Compared with the results of similar studies both at home and abroad, the pollution degree and ecological risk of PAHs, PCBs and OCPs in the sediments of the surveyed waters are all at a low level.