Investigating the Pollution Characteristics and Primary Components Source Apportionment of PM10 in Nanjing Port

摘要

In order to investigate the characteristics and the sources of PM 10,the Nanjing port was selected as the sampling site for atmospheric PM10 samples collections.The sampling was introduced during represent months in summer and winter.Then the elements,ions and OC/EC chemical components were detected by ICP-MS,ion chromatography and carbon analyzer,respectively.The results showed that the average concentration of atmospheric PM 10 in summer and winter for Nanjing port Was 88.1 ± 31.9 μg/m 3 and 136.9 ± 76.8 μg/m 3,respectively.The concentrations of in organic secondary Components In summer and winter were25.4μg/m 3 and 40.8μg/m 3,accounting for 28.9% and 31.1% of the total PM 10,respectively;the concentration was highest for NO 3-in summer and for SO 4 2-in winter.There is obvious difference between the concentration of carbonaceous components in summer and winter,and the concentration of total carbonaceous components was 88.1 ± 31.9 μg/m 3 and 136.9 ± 76.8 ng/m 3,accounting for 24.4% and 39.7% of the total PM 10,respectively;Variation of primary carbonaceous components is the reason Causing the difference s.Source apportionment results indicate d that the soil dust and coal combustion,metallurgy,motor vehicle,ship and sea salt were the main contributors To the PM 10 in Nanjing port.Soil dust contributed most (33%),and the contribution percentages of sea salt and ships were approximately 6.4% and 6.6%,respectively.The contribution s of sea salt and ship emissions in winter were slightly higher in winter than that in summer.