辽河水中PAHs的污染水平及源解析

Pollution level and source apportionment of polycyclic aromatic hydrocarbons(PAHs)in Liaohe River

在辽河的干支流选择12个例行监测断面,分别于2007年8月和11月采集水样,分析16种US EPA(美国环保署)优控多环芳烃(PAHs)的浓度变化。结果表明:辽河丰水期16种PAHs总量的浓度范围为216—848 ng/L,平均值为430 ng/L;枯水期16种PAHs总量的浓度范围为221—1360 ng/L,平均值为660 ng/L。特征指数表明,辽河水中PAHs主要来源于燃料的高温不完全燃烧,燃烧源为机动车、煤和生物质等。

Water samples were collected from 12 routine environmental monitoring sites of Liaohe River in August 2007 and November 2007, and the concentrations of 16 polycyclic aromatic hydrocarbons （ PAHs ） were simultaneously analyzed. The results show that the range of total PAHs concentration in Liaohe River are from 216 ng/L to 848 ng/L in high flow season and from 221 ng/L to 1360 ng/L in low flow season. The average concentrations in high flow season and in low flow season are 430 ng/L and 660 ng/L, respectively. Fuel-burning is the main source of PAHs in Liaohe River. The fuel source includes motor vehicles, coal and biomass and so on.