Concentration and source of polychlorinated naphthalenes in surface soils of coal chemical industrial park
In order to explore the pollution level,spatial distribution characteristics and source of polychlorinated naphthalenes(PCNs)in surface soils of coal chemical industrial park,a method was developed for the simultaneous determination of PCNs in soil by isotope dilution gas chromatography coupled with triple quadrupole mass spectrometry.The concentrations,composition characteristics and pollution sources of PCNs in surface soils of coal chemical industrial park were analyzed and determined.The result showed that total concentrations of PCNs in all samples ranged from 0.358 to 1.349 ng/g and the toxic equivalents(TEQ)relative to 2,3,7,8-tetrachlorodibenzo-p-dioxin(PCDD/Fs)ranged from 3.000 × 10-4 to 0.197 pg/g.Compared with PCNs in soils of various regions at home and abroad,the concentrations and toxicity levels of PCNs in the soil of coal chemical industrial park were in the middle range.The PCNs in soil of the coal chemical industrial park were mainly low-chlorinated,among which dichloronaphthalene and trichloronaphthalene accounted for a high proportion of 23.7％(mass fraction,the same below)-43.0％and 41.7％-56.8％,respectively.The thermal process of coking production was the main source of soil PCNs contamination in this coal chemical industrial park.
polychlorinated naphthalenessoilcoal chemical industrial parksource
万方数据
维普
