Decomposition of 2-naphthalenesulfonate in aqueous solution by ozonation with UV radiation
Resource
Water Research 36 (16): 4144-4154
Journal
Water Research
Journal Volume
36
Journal Issue
16
Pages
4144-4154
Date Issued
2002
Date
2002
Author(s)
Chen, Y. H.
Chang, C. Y.
Huang, S. F.
Chiu, C. Y.
Ji, D.
Shang, N. C.
Yu, Y. H.
Chiang, P. C.
Ku, Y.
Abstract
This study investigates the ozonation of 2-naphthalenesulfonate (2-NS) combined with ultraviolet (UV) radiation. Naphthalenesulfonic acids are of importance as dye intermediates for the dye and textile auxiliary industries. Its derivatives, such as 2-NS, have been found in rivers and tannery effluents causing pollution problems. Thus, the 2-NS is of concern for the aquatic pollution control especially in the surface and waste waters. Ozonation combined with UV radiation is employed for the removal of 2-NS in the aqueous solution. Semibatch ozonation experiments were proceeded under different reaction conditions to study the effects of ozone dosage and UV radiation on the oxidation of 2-NS. The concentrations of 2-NS and sulfate are analyzed at specified time intervals to elucidate the decomposition of 2-NS. In addition, values of pH and oxidation reduction potential are continuously measured in the course of experiments. Total organic carbon is chosen as a mineralization index of the ozonation of 2-NS. The mineralization of 2-NS via the ozonation is remarkably enhanced by the UV radiation. These results can provide useful information for the proper removal of 2-NS in the aqueous solution by the ozonation with UV radiation.
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Type
journal article
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