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| Kinetic study of ametryn degradation by UV activated persulfate |
| LI Wei-ping1, WANG Chao-hui1, YU Ling-hong1, GAO Nai-yun2, YANG Wen-huan1 |
1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. State Key Laboratory of Pollution Control & Resources Reuse, Tongji University, Shanghai 200092, China |
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Abstract The degradation of the ametryn (AMT) by means of UV/Persulfate (PS) was investigated.The effect of degradation and economical efficiency were compared between UV and UV/PS, while emphasis was given on the effect of initial substrate concentration, PS dosage, and initial pH for the kinetics of AMT degradation by UV/PS. The main radical generated in the reaction were identified using the indirect method. The results showed that degradation of AMT by UV/PS was more cost-effective than UV alone . AMT degradation follows the first-order kinetic well (R2≥0.95), the persudo-first-order-constant kobs decreases with the increase of AMT concentration;the value of kobs was magnified gradually with the increasing PS dosage; controlling the pH of 5~10, kobs reaches the top of 0.0540min-1when pH=5; the main radical generated is ·SO4- when pH=7.
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Received: 10 March 2016
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