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ABSTRACTThis research describes the nature and extent of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) contamination in the soil samples from a waste cable incineration plant. The samples are collected at different places in the nearest and far away points of the soil around the incineration plant. A procedure which is described for the selective separation of 2,3,7,8-TCDD from all other PCDDs and PCDFs fractionated on Alumina Woelm B Super 1 in such a manner that all PCDDs and PCDFs are eluted prior to 2,3,7,8-TCDD. This procedure allows more sensitive quantitative determination of 2,3,7,8-TCDD in the soil samples.

The compounds 2-7 were isolated from solutions of phenanthrene (1) and nitrogendi-oxide in carbon tetrachloride after irradiation with UV light having long wavelengths (λ > 290 nm). With the help of spectroscopical methods the proposed structures are derived. Radical mechanisms are proposed for these reactions.