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科学通报  2013 

典型工业过程中产生的多氯萘与二口恶英类的相关性

DOI: 10.1360/972013-114, PP. 2657-2663

Keywords: 多氯萘,二口恶英类,生成特征,相关性分析,生成机理

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Abstract:

多氯萘(PCNs)和二口恶英类(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.

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