长江口水体中半挥发性有机污染物的分布特征

采用气相色谱法分析了长江口水体中64种半挥发性有机污染物(SVOCs)的含量,共检出其中的50种SVOCs,主要包括多环芳烃类、酚类、酯类、卤代烃类、取代苯类和醚类.其中属于我国优先控制污染物的有16种,属于美国优先控制污染物的有42种,属于我国《地表水环境质量标准》(GB3838-2002)控制的有10种.长江口水体中SVOCs的空间分布表明,南港附近城市排放的工业废水和生活污水是影响水体中SVOCs含量的重要因素之-,表现为排污口附近水域各类SVOCs含量均较高.水体中2,4-二硝基甲苯和六氯丁二烯的检出值超过了中国地表水环境质量标准限值,其最大值分别超标3.32和2.07倍.

Distribution Characteristics of Semivolatile Organic Compounds in Water from Yangtze Estuary

64 kinds of semivolatile organic compounds(SVOCs) in water from Yangtze Estuary were determined by gas chromatogram.50 kinds of SVOCs were checked out,including PAHs,phenols,esters,halogenated hydrocarbons,substituted benzenes and ethers.There are 16 kinds of national priority-controlled organic substances,42 kinds of EPA priority-controlled organic substances and 10 kinds of Environmental Quality Standards for Surface Water(GB3838-2002) controlled organic substances among them.Spatial distribution characteristics of SVOCs showed that discharge of industrial and domestic wastewater from South Harbor was one of the major reasons which affected the concentration of SVOCs in Yangtze Estuary.Many kinds of SVOCs had high value near sewage outfall.Concentrations of 2,4-dinitrophenol and hexachlorobutadiene were both higher than the limited value defined by GB3838-2002 in China,with the overruns being 3.32 and 2.07 respectively.