云龙湖水体中有机类污染物污染特征与评价

Contamination and Comment of Organic Pollutions in the Surface Water of Yunlong Lake

通过液液萃取-气相色谱/质谱法对云龙湖4个代表性点位水样中23种半挥发性有机物(SVOC)和16种多环芳烃(PAHs)进行定性和定量分析,共计检测出15种有害污染物,其中包括10种多环芳烃(PAHs)、3种三氯苯和2种酞酸酯类。参考地表水环境质量要求[1],其污染物浓度均在安全范围内。与其他地区湖库水质比较,云龙湖水体中PAHs污染处于较高水平,从PAHs污染物检出数量以及各组份间分配关系来看,该湖主要的污染途径为地表径流、雨水沉降以及人类活动等。

4 representative water samples from Yunlong Lake was examined using liquid-liquid extraction/GC method. 23 kinds of semi-volatile organic compounds （SVOCs） and 16 kinds of polycyclie aromatic hydrocarbons （PAHs） were determined both qualitatively and quantitatively. 10 polycyclic aromatic hydrocarbons （PAHs）, 3 kinds of trichlorobenzene, two kinds of phthalate esters were detected in these samples. According to the Surface Water Environmental Quality Standards, the pollution level is in a relatively safe range. Compared with other lake water samples, the PAHs pollution in Yunlong Lake is in the high pollution levels. In the view of the amount and distribution relations among PAHs pollution, the chief pathways of pollution are surface runoff, rainfall precipitation and human activities.