Advanced oxidation processes are defined as those which involve the generation of hydroxyl radicals in sufficient quantity to affect water purification. The theoretical and practical yield of OH from 03 at high pH, 03/H202, O3/UV and H202/UV systems is reviewed. New data is presented which illustrates the importance of direct photolysis in the O3/UV process, the effect of the H202:03 ratio in the o3/H2O2 Process, and the impact of the low extinction coefficient of H202 in the H202/UV process.
Bibliographical noteFunding Information:
The authors are grateful to the City of Los Angeles Department of Water and Power for support of this work, partially with funds supplied by the U.S. Environmental Protection Agency through Cooperative Agreement CR-813188, and to E. Marco Aieta, Rhodes Trussell and Carol Tate of James M. Montgomery Consulting Engineers for useful discussions. This article has not been subjected to review by the U.S. EPA. Therefore! it does not necessarily reflect the views of this agency, and no official endorsement should be inferred.
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry