珠江三角洲地区大气气溶胶中有机污染物背景研究

Study on organic pollutant background in aerosols in Pearl River Delta area

选择肇庆市鼎湖山自然保护区为珠江三角洲大气气溶胶有机污染评价的区域性环境背景．研究结果表明，珠江三角洲地区大气气溶胶中优控多环芳烃背景值萘、苊、二氢苊、芴、菲、蒽、荧蒽、芘、苯并（a）蒽、、苯并（b）荧蒽、苯并（k）荧蒽、苯并（a）芘、茚并（1，2，3-cd）芘、二苯并（a，h）蒽、苯并（ghi）分别为n.d.、n.d.、tr.、0.14、tr.、0．39、0.53、0.19、1.05、1.82、1.41、0.02、2.29、0.53和2．44ng/m3，总量为10.80ng/m3，其来源主要为高等植物排放.

Dinghu nature reserve in Zhaoqing city was chosen as the regional environmental background of organic pollut ant valuation in aerosols in Pearl River Delta area. Results of study indicate that background values of priority PAHs, in aerosols in Pear River Delta area, including naphthalene,acenaphthylene, acenaphthene(dihydroacenaphthylene),fluorene,phenanthrene,anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene,benzo(b)fluoranthene, benzo(k)fluoranthene,benzo(a)pyrene, indeno(1,2,3-cd)pyrene, dibenzo(a,h)anthracene and benzo(ghi)perylene,are n.d., n.d., n.d., tr., 0.14, tr.,0.39, 0.53, 0.19, 1.05, 1.82, 1.41, 0.02, 2.29, 0.53 and 2.44ng/m3, respectively; and the total value is 10.80ng/m3. They come mainly from emission of higher plant.