PHOTOCHEMICAL CONVERSIONS OF POLYCHLORINATED PHENOLS IN AN AQUEOUS-MEDIUM .1. DIRECT PHOTOLYSIS

To apprise ecological hazard of the products formed upon light-induced conversions of polychlorinated phenols, direct photolysis under illum ination with solar light or filtered light from mercury lamps of aqueo us solutions of some chlorinated phenols (2,4,5-TCP) with a buffer und er aerobic and anaerobic conditions was studied. Concentrations of chl orinated phenols and photolysis products were measured by spectrophoto metric and chromatographic techniques, including high-efficiency liqui d chromatography and chromatomass-spectrometry (an ITD Finnagan MAT in strument). The fact of formation of polychlorinated dibenzodioxins and dibenzofurans is established.