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| Study on the degradation of triclosan in aqueous by potassium ferrate |
| LI Qing-song1, JIN Wei-wei1,2, MA Xiao-yan2, LI Guo-xin1, CHEN Guo-yuan1, GAO Nai-yun3, LIAO Wen-chao1 |
1. Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen 361005, China;
2. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;
3. National Key Laboratory of Pollution Control and Reuse, Tongji University, Shanghai 200092, China |
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Abstract The degradation of triclosan (TCS) in aqueous by potassium ferrate was investigated, and the degradation mechanism of TCS was researched. Besides, the effects of different factors, such as potassium ferrate dosage, TCS initial concentration, pH, natural organic matter (NOM) and hydrogen peroxide on TCS degradation and the 2,4-DCP formation during potassium ferrate oxidation was specifically discussed. The results indicated that TCS was degraded into 2,4-DCP via cleavage of the ether bond. The degradation rate of TCS could reach 96.48% within 600s under TCS initial concentration of 550μg/L, and potassium ferrate dosage of 15mg/L. The oxidation of TCS was not a simultaneous detoxification process. The degradation of TCS was showed positive correlation with the increase of potassium ferrate dosage, but decreased with the increase of pH. Acid environment was conducive to the TCS removal, and the removal of TCS reached 100% when pH value was 10.7. However, TCS removal was inhibited by the presence of NOM and hydrogen peroxide. Potassium ferrate can effectively degrade TCS, lower acute toxicity of reaction solution, and therefore, reduce health risk of water quality.
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Received: 06 January 2016
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