第二松花江中下游水体中苯系物含量及分布特征

Content and Distribution Characteristics of BTEX of Water Body in Middle and Lower Reaches of Second Songhua River

本次研究采用气质联用仪分析第二松花江中下游江段底泥和水中苯、甲苯、乙苯和二甲苯的含量,并对其分布特征和成因进行了讨论。研究发现,水中苯系物含量均远低于我国地表水环境质量标准和美国国家一级饮用水标准的限值。与国内其他水体相比,第二松花江江水中苯系物含量水平较低。底泥中苯系物含量显著高于水中,市区江段水和底泥中苯系物含量普遍高于非市区江段。

Benzene, toluene, ethylbenzene and xylene in water and sediments in middle and lower reaches of Second Songhua River are analyzed by gas chromatography--mass spectrometry. The distribution characteristics and reason are discussed. The result shows that the concentration of BTEX in water is much lower than standard limited value in ＂Environmental quality standards for surface water＂ and ＂Water Quality Standard for Drinking Water of USA＂. BTEX concentration in water is relatively low compared with other domestic rivers, BTEX concentration in water is much higher than in sediments. Concentration of BTEX in middle and lower reaches of Second Songhua River in urban districts is higher than that in suburb.