title: Sedimentary Records of Non-Aroclor and Aroclor PCB mixtures in the Great Lakes.
abstract: Three sediment cores from Lake Ontario, Lake Erie and Indiana Harbor Ship Canal were collected, segmented and analyzed for Aroclor and non-Aroclor polychlorinated biphenyl congeners (PCBs). PCBs associated with the commercially produced Aroclor mixtures 1248 and 1254 dominate the sediment signal and the sum of all congeners (ΣPCB) peaks in concentration and accumulation around 1970 in the Great Lakes. This trend is very similar to Aroclor production history. In the Indiana Harbor Ship Canal, PCBs appear around 1935 and remain at very high levels between 1940 and 1980, probably reflecting the history of use at the nearby steel mill. In contrast, the non-Aroclor PCBs in the Lake Ontario and IHSC sediment cores, including PCB11 and heavily chlorinated congeners PCB206, 207, 208 and 209 reach a peak in the 1950s, decline and peak again in the 1970s or in the early 1980s. All five congeners have been previously measured in commercial paint pigment. PCB11 was found to peak about 5 years later than ΣPCBs, and is probably associated with the production or use history of diarylide yellow pigments. The temporal distribution profiles of these non-Aroclor PCBs are well correlated with the production history of paint pigments and dyes. Although it is well known that the production of Aroclor PCBs is preserved in Great Lakes sediments, this study is the first to show that production of non-Aroclors are also preserved in the sediments as a record of long term trends in environmental exposure.
authors.affiliation: Department of Civil & Environmental Engineering and IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242.
authors.forename: Dingfei
authors.initials: D
authors.lastname: Hu
authors.forename: Andres
authors.initials: A
authors.lastname: Martinez
authors.forename: Keri C
authors.initials: KC
authors.lastname: Hornbuckle
keywords: PCB 11; PCB 206; PCB 207; PCB 208; PCB 209; paints; pigments; sediment
references.citation: Environ Sci Technol. 2010 Apr 15;44(8):2803-8
references.pmid: 20131898
references.citation: Environ Sci Technol. 2006 Sep 15;40(18):5629-35
references.pmid: 17007119
references.citation: Environ Sci Technol. 2008 Oct 1;42(19):7125-31
references.pmid: 18939536
references.citation: Environ Res. 2005 Jul;98(3):284-302
references.pmid: 15910784
references.citation: Atmos Environ (1994). 2010 Apr;44(12):1550-1557
references.pmid: 21918637
references.citation: Crit Rev Toxicol. 1994;24(2):87-149
references.pmid: 8037844
references.citation: Environ Sci Technol. 2005 May 15;39(10):3548-54
references.pmid: 15952357
references.citation: Environ Sci Technol. 2010 Apr 15;44(8):2816-21
references.pmid: 20384375
references.citation: Environ Sci Technol. 2010 Apr 15;44(8):2797-802
references.pmid: 20384374
references.citation: Environ Sci Technol. 2009 Sep 1;43(17):6488-92
references.pmid: 19764206
references.citation: Environ Sci Technol. 2007 Feb 15;41(4):1152-8
references.pmid: 17593713
references.citation: Environ Sci Technol. 2008 Jun 1;42(11):4044-51
references.pmid: 18589964
references.citation: Environ Sci Technol. 1995 Oct 1;29(10):2661-72
references.pmid: 22191970
references.citation: Environ Sci Technol. 2010 Apr 15;44(8):3035-40
references.pmid: 20199076
references.citation: Environ Sci Technol. 2010 Apr 15;44(8):2822-7
references.pmid: 19957996
references.citation: Environ Sci Technol. 2009 Mar 1;43(5):1287-92
references.pmid: 19350892
references.citation: Environ Sci Technol. 2008 Nov 1;42(21):7873-7
references.pmid: 19031874
references.citation: Environ Toxicol Pharmacol. 2008 Mar;25(2):241-6
references.pmid: 18452002