Kinetic expressions for the aqueous reactions of chlorine with phenanthrene (pH 3-10), fluorene (pH 3-5), and fluoranthene (pH 3-5) have been developed. At pH 3-5 the rate of reaction of each PAH studied could be related to the chlorine concentration (-d[PAH]). Phenanthrene, also studied at high pH values (pH >8.8), followed a rate expression consistent with pseudo-first-order kinetics (-d[phen]). The overall rate expression that was developed for phenanthrene is suggested as a model for correlating the rates of reaction of chlorine with polynuclear aromatic compounds in water over the entire pH range (pH 3-10) that might reasonably be encountered during disinfection. This overall expression is Cl•, and O" (24).The arene oxide (phenanthrene 9,10-oxide) was the predominant phenanthrene product at pH 54 while phenanthrene-9,10-dione and 9-chlorophenanthrene were the major products at pH S4.
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