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Acta Scientiae Circumstantiae. 2014, (07) Core

Characterization of water-soluble anions in PM10 and TSP in Xinzhou CityChinese Full Text

SHI Meixian;PENG Lin;BAI Huiling;MU Ling;LIU Fengxian;YANG Hua;College of Environmental Science and Engineering,Taiyuan University of Technology;

Abstract: To investigate the characteristics and sources of water-soluble ions in the atmospheric particulates in Xinzhou,PM10and TSP samples were collected by the medium volume sampler at four sampling sites during heating period and non-heating period. Concentrations of the major water-soluble anions（ SO2-4,NO-3and Cl-） were analyzed using ion chromatography. Temporal and spatial distributions,correlation parameters and NO-3/SO42-ratios were investigated in detail. It was found that the total three anions concentrations of PM10and TSP were 14. 24 μg·m-3and 21. 97 μg·m-3,respectively,during heating period,which were significantly higher than the concentrations during non-heating period,8. 56 μg·m-3and 11. 84 μg·m-3respectively.The concentration of total water-soluble anions accounted for 15. 70% and 13. 19% of PM10and 12. 16% and 8. 84% of TSP during heating period and non-heating period,respectively,which indicated that the anions were mainly concentrated in PM10. Average concentrations of three water-soluble anions at four sampling sites during heating period were higher than those during non-heating period,and the concentration of total water-soluble anions at DC site was the highest. The temporal and spatial distributions of anions concentrations were obviously different. The correlation between NO-3and SO2-4was significantly positive during heating period,indicating their formation process in the ambient air might be subject to the same control factors; the correlations between Cl-and NO-3,SO2-4were also good,indicating they mainly came from the same source. The NO-3/SO2-4ratio was in the range of0. 31 1. 41. The relatively high value indicated that mobile source became more and more predominant. The average values of NO-3/SO2-4ratios were all below 1,which indicated that the stationary emissions（ coal combustion） were dominant sources of airborne pollutants in the urban atmosphere. Coal combustion and vehicle exhaust were the main sources of water-soluble ions in Xinzhou City.
Keywords：

PM10; TSP; water-soluble anions; correlation; Xinzhou City;

  • DOI：

    10.13671/j.hjkxxb.2014.0582

  • Series：

  • Subject：

  • Classification Code：

    X51

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