典型工业过程中产生的多氯萘与二噁英类的相关性

Correlation analysis of unintentional polychlorinated naphthalenes with polychlorinated dibenzo-p-dioxins and dibenzofurans produced during industrial processes

多氯萘(PCNs)和二噁英类(PCDD/Fs)化合物可在工业热过程中非故意产生和排放,对PCNs和PCDD/Fs的相关性分析可为PCNs和PCDD/Fs的协同控制提供理论依据.本研究对废弃物焚烧和金属冶炼产生的飞灰中的PCNs和PCDD/Fs进行了相关性分析.对PCDDs,PCDFs和PCNs同系物的皮尔森相关性分析发现,3类污染物的共性规律是:相邻同系物间的相关性系数明显高于非相邻同系物间的相关性系数,说明低氯代同系物的氯化可能是高氯代同系物生成的一类重要途径;不同的规律是:对于PCNs,非相邻同系物间的相关性也相对较好;但对于PCDD/Fs,非相邻同系物间的相关性系数相对较低.对PCNs与PCDD/Fs同系物的线性相关性分析发现,TeCN,PeCN,HxCN与PeCDF,HxCDF和HxCDD的线性相关性较好(R2在0.58～0.89之间),表明工业热过程中这些同系物的生成机制具有相似性.

Polychlorinated naphthalenes （PCNs） and polychlorinated dibenzo-p-dioxins/dibenzofurans （PCDD/Fs） could be unintentionally produced and released during industrial thermal processes. The correlation analysis of PCNs with PCDD/Fs might provide helpful information for developing the techniques for controlling the release of PCNs and PCDD/Fs. In this study, the concentration relationships of PCDDs, PCDFs and PCNs homologues in fly ash samples from waste incinerations and metallurgical processes were analyzed by Pearson correlation analysis. For PCDDs, PCDFs and PCNs, the common characteristic was that the correlation coefficients between adjacent homologues were obvious higher than that of non-adjacent homologues, indicating the formation of higher chlorinated homologues possibly through the chlorination of low chlorinated homologues. For non-adjacent homologues, the correlation coefficients were higher for PCNs than that of PCDD/Fs. The linear correlation analysis was also performed for PCN and PCDD/F homologues, and the results indicated that tetra-, penta- and hexa- chlorinated homologues were closely correlated with PetanCDF, HexaCDF, and HxCDD （R2： 0.58-0.89）, indicating similar formation pathway of these homologues during industrial thermal processes.