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To investigate the environmental levels and profiles of PCDD/Fs, samples of ambient air, soil and river sediment were collected from a typical regional without industrial pollution in southern China. The results showed that the mean PCDD/F concentrations samples were 0.0053±0.0054 pg/Nm3 in air, 1.9075±0.0562 pg/g in soil and 1.1422±0.0144 pg/g in sediment, respectively. The results also showed that PCDFs were predominant in all air samples, and it was opposite in the soil and sediment. The PCA indicated that the congener profiles of PCDD/Fs in the soil and river sediments were similar, but different from the samples in air.

Although there were many studies focused on the PCDD/Fs emissions from different incinerators, but the emissions in a whole plant have seldom been reported. This paper investigated the distributions and congener profiles of the PCDD/Fs in the stack gas, fly ash, dust in the precipitator and slag from an whole medical waste incinerator. The result showed that 1) the PCDD/Fs of the dust in the precipitator had the highest level in all the samples. 2) 2,3,7,8-TCDD was the important characteristic factor in the TEQ values of most samples.