Abstract
Our earlier research on the photochlorination of some organics suspended in solutions of aqueous Cl− codissolved with anionic NOx− is extended to systems comprising either bromides or iodides, and NO3−. It is found that the bromide-containing systems follow, under both artificial UV and sunlight, overall reaction patterns quite similar to those of chlorides although the rate term which stands for the bromination of organics is larger and directly proportional to light intensities. Solutions containing iodides also follow a similar overall pattern but the first rate term is now proportional to the square of light intensity. However, they react liberating detectable amounts of iodine which thereafter attack the hydrocarbon. This excess of elementary iodine is thus found to be either dissolved in or adsorbed by the organic; it furthermore also dissolves and becomes complexed in the aqueous phase.
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