Development of Kinetic Parameters for the AdvancedOxidation of Resin and Fatty Acids

摘要

Experiments were conducted to investigate the applicability ofrnadvanced oxidation processes (AOPs) to reduce the concentrations ofrnresin and fatty acids (RFAs), specifically abietic and linoleic acids,rnfound in pulp mill effluents. The oxidation kinetics of the reactionrnbetween dissolved ozone and either RFA at pH 7.3 were evaluatedrnusing a continuous flow stirred tank reactor (CFSTR). The overallrnkinetics were modeled as a second order, with first order in respect tornboth ozone and RFA. At 20℃, the overall rate constants for abietic andrnlinoleic acids, were predicted to be 3.47×103 and 1.31×104 M-1sec-1,rnrespectively. It was also observed that greater than 85% reduction ofrn12.0 mg/L linoleic acid and 70% reduction of 4.5 mg/L abietic acid wasrnachieved with ozone doses on the order of 2.5 mg/L. Also, acuterntoxicity was investigated using Microtox? assays and the resultsrnshowed a general increase in toxicity for abietic acid oxidation, but anrnoverall decrease in toxicity for linoleic acid oxidation.