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Advanced oxidation with ozone of 1,3,6‐naphthalenetrisulfonic acid in aqueous solution
Author(s) -
SánchezPolo M,
RiveraUtrilla J,
Zaror C A
Publication year - 2002
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.539
Subject(s) - chemistry , ozone , aqueous solution , reaction rate constant , kinetics , inorganic chemistry , alcohol , reaction rate , nuclear chemistry , organic chemistry , catalysis , physics , quantum mechanics
The kinetics of oxidation with ozone of 1,3,6‐naphthalenetrisulfonic acid was analysed by studying the influence of different experimental parameters such as the concentration of tert ‐butyl alcohol (2‐methyl‐2‐propanol), initial concentration of the acid, pH, and temperature. The rate constant of the direct reaction at 25 °C was calculated ( k D = 6.72 M −1 s −1 ). The constant of the free radical reaction was determined with the competitive kinetics method, using sodium 4‐chlorobenzoate as reference compound, obtaining a value of k OH = 3.7 × 10 9 M −1 s −1 . It was demonstrated that even at very acid pH values, 80% of the 1,3,6‐naphthalenetrisulfonic acid was degraded by free radical reactions, so that the ozonation of this acid may be considered an advanced oxidation process. © 2002 Society of Chemical Industry