Pollution characteristics and source analysis of volatile organic compounds in the environ-mental air of Guangzhou City
117 volatile organic compounds(VOCs)in the ambient air of Guangzhou have been manually moni-tored by means of gas chromatography and liquid chromatography.The pollution situation,composition characteris-tics,and ozone generation potential and its main sources of VOCs in Guangzhou have also been analyzed.The results show that the average volume fraction of VOCs in the ambient air of Guangzhou is 59.86×10-9,which is above the na-tional average level.The concentration of the main components is 35.08％for alkanes,34.43％for oxygen-containing volatile organic compounds(OVOCs),12.57％for aromatic hydrocarbons,10.63％for halogenated hydrocarbons,4.19％for olefins,2.72％for alkynes and 0.38％for organosulfur compound.Under the influence of monsoon climate,the spatial distribution of VOCs in Guangzhou shows a high concentration in the northern part and a low concentration in the southern part in summer,and low in the north and high in the south during winter.The ozone generation poten-tial of VOCs in Guangzhou is 164.60μg/m3,with OVOCs and aromatic hydrocarbons contributing the most,with contri-bution rates of 50.51％and 21.15％,respectively.With the analysis of the PMF,the result can be inferred that the in-dustrial related emissions,motor vehicle exhaust emissions,and the combustion of liquefied petroleum gas/liquefied natural gas are the main sources of VOCs pollution in the ambient air of Guangzhou.
万方数据
维普
