RADIATION DEGRADATION OF WASTE-WATERS .1. REVERSE PHASE-HIGH PERFORMANCE LIQUID-CHROMATOGRAPHY AND MULTICOMPONENT UV-VIS ANALYSIS OF GAMMA-IRRADIATED AQUEOUS-SOLUTIONS OF NITROBENZENE

Saturated aqueous solutions of nitrobenzene (in water, 0.1M nitric aci d and 0.1M potassium hydroxide) were irradiated with Co-60-gamma-rays in deaerated condition. Radiolytic products were analyzed using revers e phase-high performance liquid chromatography (RP-HPLC) and multicomp onent UV-VIS spectrometry. With the aid of RP-HPLC retention times of the radiolytic products were found to be identical with those of isome ric nitrophenols, aminophenols and dinitrophenols. According to the pr imary information obtained from RP-HPLC and literature, we have chosen ten standards and eleven wavelengths for multicomponent UV-VIS analys is (linear multiparametric regression analysis) and the concentrations of nitrobenzene, nitrophenols, aminophenols and dinitrophenols in wat er, HNO3 and KOH solutions were calculated. G-values molecules/100 eV) of the radiolytic products and decomposition of nitrobenzene in aqueo us solutions G(-nitrobenzene) were calculated from the dependence of t heir concentrations with dose. Ph has relatively little influence on t he decrease of concentration of nitrobenzene, but has strong influence on the product composition.