UV photons excite organic compounds forming free radical species, which can then combine with molecular oxygen to form partially oxidizable imtermediates. This is key to the degradation of organic pollutants in waste water treatment plants using UVR. Addition of hydrogen peroxide or certain metal ions like Fe(III) can speedily catalyze the degradation of organic pollutants, but do electron withdrawing ( eg. carboxylate) or donating (amine) groups influence the hydrolysis of C-P bonds in certain organophosphorus compounds?