In the urban areas the commercial center is located in

In addition to Confucius Temple, Xinjiekou, and the transportation junction, 17,100 ng g− 1 occurred on the roadside at the crossroad between Ruanjian avenue and Andemen street, and 16,800 ng g− 1 on the roadside at Shuanglong street overpass. The spatial distribution of heavier PAHs also confirmed radially symmetrical these sites deposited large amounts of PAHs from vehicles or other sources every day.