Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
578877 | Journal of Hazardous Materials | 2011 | 6 Pages |
Abstract
These days, the use of persulfate in advanced oxidation processes (AOPs) has gained more attention as an emerging clean and efficient technology to degrade the organic pollutants. The objective of this study was to investigate the effect of the addition of persulfate on the oxidation of benzotriazole (BT) and humic acids (HAs) by irradiation. The degradation of BT (3.7 μM) was followed under the influence of persulfate addition (200-500 μM) in combination with a fixed radiation dose (15 Gy) in the absence and presence of HA (5 and 20 mg/L) in deionized water. The main results obtained in this study on the degradation of BT in the presence of HA showed a different effect of S2O82â addition during irradiation, depending on whether HA are oxidized or not-oxidized. (1) An inhibitory effect of S2O82â was observed in the presence of non-oxidized HA. (2) The removal of BT was generally more important during irradiation in the presence of S2O82â when HA is pre-oxidized. This could be explained by the different structures of humic acids. These differences of structures of HA were identified by physico-chemical parameters such as the absorbance in the UV (254 nm), the fluorescence and the SUVA measurement.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Babak Roshani, Nathalie Karpel Vel Leitner,