Pollution Status and Sources of Polycyclic Aromatic Hydrocarbons and Phthalates in Soil of Industrial Parks in Yangtze River Delta

To assess the status of soil organic pollution in industrial parks, forty-five soil samples were collected from the representative industrial parks in Yangtze River Delta for analyzing soil organic pollution by gas chromatography equipped with a mass spectrometry detector, and their sources were also analyzed by characteristic ratio. There are computer, communication and electronic equipment manufacturing, chemical raw material and product manufacturing, rubber and plastic product manufacturing, automobile manufacturing, and textile and clothing industry in the representative industrial parks. The results show as follows: (1) The soils around the industrial parks were seriously polluted. 23 semi-volatile organic pollutants were detected in soil samples among which the detection rates of polycyclic aromatic hydrocarbons (PAHs) and phthalates (PAEs) were 100% and 75.6%, respectively, and the concentrations were 2.19-15 200.90 μg·kg^-1 and n.d. -4 168.56 μg·kg^-1, respectively. (2) The concentrations of 4-6 rings PAHs in the old industrial parks are higher than those in the new industrial parks. In addition, attention should be paid to the process of soil pollution caused by automobile manufacturing, rubber and plastic manufacturing, computer communication and other manufacturing industries in the industrial parks. (3) The PAHs in soil of industrial parks mainly came from combustion sources. It is necessary to pay more attention to the pollutant discharge in the process of coal and fuel oil burning of enterprises in the parks, and to strengthen the control of PAEs in the production process of rubber and plastic manufacturing and chemical raw materials and chemical products manufacturing.