Abstract：
:Aroclor 1242 contains a high percentage of lightly chlorinated congeners, which makes it susceptible to congener profile alterations as a result of physical-chemical environmental weathering by water washing, evaporation, and volatilization. The analysis of the variability of congener profiles in paper sludge samples using PCA, mixing models, and correlation (R(2)) analysis, provided an integrated description of the behavior of Aroclor 1242 after its release in the environment. The results showed that the total PCB concentration decreased as the sample experienced weathering, with the congener profile of Aroclor 1242 shifting towards resembling heavier Aroclors as lighter congeners were lost. Mixing model analysis confirmed that a sample containing weathered Aroclor 1242 could easily be misidentified by laboratories as containing a mix of heavier Aroclors. The R(2) analysis showed that the profile of the congeners within a homologue group remained the same after weathering. This analysis showed that congeners that belong to the same level of chlorination behave similarly in such a manner that retains their overall profile when exposed to physical weathering.
journal_name
Chemospherejournal_title
Chemosphereauthors
Saba T,Boehm PDdoi
10.1016/j.chemosphere.2010.12.011subject
Has Abstractpub_date
2011-02-01 00:00:00pages
1321-8issue
9eissn
0045-6535issn
1879-1298pii
S0045-6535(10)01401-3journal_volume
82pub_type
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