青岛市松针中多环芳烃污染状况研究

Study on Polycydic Aromatic Hydrocarbons in Ambient Air by Pine Needle Qingdao

松针、苔藓类等植物可有效的监测环境空气中多环芳烃等有机污染物。为了解青岛市松针中多环芳烃的污染状况,本文使用索氏提取、氧化铝—硅胶净化柱净化、气相色谱—质谱(GC-MS)分析的方法,研究了青岛市6个不同区域的松针中多环芳烃的含量。该方法的提取净化效率在70.8%以上。在6个采样点中,1号采样点松针中的多环芳烃含量最低,平均为7.54 ng/g(湿重含量),5号和6号采样点最高,分别为41.0 ng/g和39.6 ng/g。多环芳烃浓度季节变化规律为春季>冬季>夏季;松针中三、四环多环芳烃占总量的82%～90%,苯并(a)芘与多环芳烃总量具有较好的相关性。

Pine is a useful plant to monitor the PAHs in atmosphere. Pine needles from six regions are collected to study the PAHs in ambient air of Qingdao. The concentration of PAHs in pine needles of Qingdao Mountain is the lowest. The Hisense cross - bridge and Hongxing chemical factory which represent the heavy traffic area and industry area have high concentration. The highest PAils concentration in summer indicates PAHs accumulation in pine needle. Three and fourring PAHs are dominant at all sites and account for 82% - 90% of the total PAHs.