Ozonation of oxytetracycline and toxicological assessment of its oxidation by-products
文献类型：期刊论文
| 作者 | Li, Kuixiao ; Yediler, Ayfer ; Yang, Min ; Schulte-Hostede, Sigurd ; Wong, Ming Hung |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2008-06 |
| 卷号 | 72期号:3页码:473-478 |
| 关键词 | oxytetracycline ozonation biodegradability COD bioluminescence test Vibrio fischeri |
| 英文摘要 | Antibiotic formulation effluents are well known for their difficult elimination by traditional bio-treatment methods and their important contribution to environmental pollution due to its fluctuating and recalcitrant nature. In the present study the effect of ozonation on the degradation of oxytetracycline (OTC) aqueous solution (100 mg l(-1)) at different pH values (3, 7 and 11) was investigated. Ozone (11 mg l(-1) corresponds the concentration of ozone in gas phase) was chosen considering its rapid reaction and decomposition rate. The concentration of oxytetracycline, chemical oxygen demand (COD), biochemical oxygen demand (BOD) and BOD(5)/COD ratio were the parameters to evaluate the efficiency of the ozonation process. In addition, the toxic potential of the OTC degradation was investigated by the bioluminescence test using the LUMIStox 300 instrument and results were expressed as the percentage inhibition of the luminescence of the marine bacteria Vibrio fischeri. The results demonstrate that ozonation as a partial step of a combined treatment concept is a potential technique for biodegradability enhancement of effluents from pharmaceutical industries containing high concentration of oxytetracycline provided that the appropriate ozonation period is selected. At pH 11 and after 60 min of ozonation of oxytetracycline aqueous solutions (100 and 200 mg l(-1)) the BOD(5)/COD ratios were 0.69 and 0.52, respectively. It was also shown that COD removal rates increase with increasing pH as a consequence of enhanced ozone decomposition rates at elevated pH values. The results of bioluminescence data indicate that first by-products after partial ozonation (5-30 min) of OTC were more toxic than the parent compound. (C) 2008 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000256870900015 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22264]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Kuixiao,Yediler, Ayfer,Yang, Min,et al. Ozonation of oxytetracycline and toxicological assessment of its oxidation by-products[J]. CHEMOSPHERE,2008,72(3):473-478. |
| APA | Li, Kuixiao,Yediler, Ayfer,Yang, Min,Schulte-Hostede, Sigurd,&Wong, Ming Hung.(2008).Ozonation of oxytetracycline and toxicological assessment of its oxidation by-products.CHEMOSPHERE,72(3),473-478. |
| MLA | Li, Kuixiao,et al."Ozonation of oxytetracycline and toxicological assessment of its oxidation by-products".CHEMOSPHERE 72.3(2008):473-478. |
入库方式： OAI收割
来源：生态环境研究中心
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