Concentration and Distribution Analysis of Heavy Metals in Total Suspended Particulates along Shanghai-Nanjing Expressway

摘要

The total suspended particulates (TSP) have been sampled at both shoulders of the west exit of the Shanghai-Nanjing expressway near Nanjing city from October to December, 2010. The concentrations of cadmium, chromium, nickel, lead and zinc metals were determined in the TSP by Microwave Digestion and Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) Method. Result showed that the daily average concentrations of TSP in atmosphere at the sampling sites were all far out the "Ambient Air Quality Standard of China". The cadmium, chromium, nickel, lead and zinc metals in all TSP samples have been already polluted at different levels. The space-iations of all tested heavy metals were different too. There existed very significant power correlation between the chromium and nickel, cadmium and chromium, cadmium and nickel, cadmium and zinc, chromium and zinc, respectively. It indicated that the air quality along Shanghai-Nanjing expressway is serious bad and causes a health hazard to the surrounding villages.