废物焚烧厂烟气中PCDD/Fs和PCNs的排放特征

Translated title of the contribution: Emissions characteristics analysis of PCNs and PCDD/Fs from waste incinerators stack gas

苏海英, 黎玉清, 张漫雯, 蔡宗苇, 张素坤*, 付建平, 青宪, 黄锦琼

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated naphthalenes (PCNs) in stack gas of waste incinerators were monitored by using high resolution gas chromatography-high resolution mass spectrometry (HRGC/HRMS) with isotope internal standard dilution method. Emissions characteristics and correlation of the two groups' pollutants were also discussed, which could provide helpful theoretical foundation for controlling PCDD/Fs and PCNs emissions from organized sources. The results showed that, (1) no obvious PCDD/Fs or PCNs contamination was found in blank experiments;(2) the recoveries of the added internal standard for sampling and extracting satisfied the requirements of US EPA23 and CHN HJ77.2-2008, which were 74.0%~90.1% and 53.3%~120.0%, respectively; (3)for PCDD/Fs, the concentration of homologues were increased with the increase of the chloride numbers, while for PCNs, the homologues firstly increased then decreased with the increase of the chloride numbers. In addition, the Pearson correlation coefficients of the adjacent homologues of both PCDD/Fs and PCNs were higher than that of the non-adjacent ones, which may reveal that the chlorination of low chlorinated homologues was an important pathway of the formation of higher chlorinated ones. High linear correlation were found from some PCNs (i.e., PeCN, HxCN, HpCN and OCN) and some PCDD/Fs (i.e., OCDD, PeCDF, HxCDF and HpCDF) (R2=0.55~0.78), which may suggest similar formation mechanism of these homologues during the process of waste incineration.

Translated title of the contributionEmissions characteristics analysis of PCNs and PCDD/Fs from waste incinerators stack gas
Original languageChinese (Simplified)
Pages (from-to)499-507
Number of pages9
Journal中国环境科学
Volume38
Issue number2
Publication statusPublished - 20 Feb 2018

Scopus Subject Areas

  • Environmental Science(all)

User-Defined Keywords

  • Correlation analysis
  • Emissions characteristics
  • PCDD/Fs
  • PCNs
  • Waste incinerators

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