Nik

                They are both compounds associated with the carbonisation of coal and are therefore found along with some other rather obscure compounds such as azobenzene in coal tar. They were produced at the high carbonisation temperatures you would associate with coking plants and gasworks operations which did not produce dioxins, which were produced at lower carbonisation temperatures. They would have also been produced to some degree from the incomplete combustion of coal in fires, furnaces etc,  so like PAH they could have been deposited through aerial disposition from chimney stacks historically. I believe that they are relatively recalcitrant to biodegradation.    

 

Best Regards

Dr Russell Thomas
BSc(Hons), PhD, CBIOL, MIBIOL, MIENVSc, CEnv, MSCI
Principal Scientist, Communities

Parsons Brinckerhoff
44-(0)7879-602-509

From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Nik Reynolds
Sent: 07 October 2009 14:41
To: [log in to unmask]
Subject: Carbazole and dibenzofuran

 

Apologies if this query is blindingly obvious, but being a geologist rather than a chemist/toxicologist... (re: Corby enquiry), can anyone tell me why carbazole and dibenzofuran tend to be intrinsically linked.  These are common compounds which crop up again and again with SVOC suites and are often the only compounds with positive results (above lod). 

 

Regards
Nik

 

Mr N Reynolds

BSc(Hons), MSc, CGeol, FGS, EurGeol

Senior Environmental Geologist

 

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