Rapid thermal-acid hydrolysis of spiramycin by silicotungstic acid under microwave irradiation
文献类型：期刊论文
| 作者 | Chen, Zheng; Dou, Xiaomin; Zhang, Yu ; Yang, Min; Wei, Dongbin
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2019-06 |
| 卷号 | 249页码:36-44 |
| 关键词 | Thermal-acid hydrolysis Synergetic effects Microwave Silicotungstic acid Spiramycin Pretreatment |
| ISSN号 | 0269-7491 |
| 英文摘要 | Spiramycin is a widely used macrolide antibiotic and exists at high concentration in production wastewater. A thermal-acid hydrolytic pretreatment using silicotungstic acid (STA) under microwave (MW) irradiation was suggested to mitigate spiramycin from production wastewater. Positive correlations were observed between STA dosage, MW power, interaction time and the hydrolytic removal efficiencies, and an integrative equation was generalized quantitively. Rapid and complete removal 100 mg/L of spiramycin was achieved after 8 min of reaction with 1.0 g/L of STA under 200 W of MW irradiation, comparing to 30.1% by MW irradiation or 15.9% by STA alone. The synergetic effects of STA and MW irradiation were originated from the dissociated-proton catalysis by STA and the dipolar rotation heating effect of MW. STA performed much better than the mineral acid H2SO4 under MW, due to the much stronger Bronsted acidity and higher Hammett acidity. After 8 min, 98.0% of antibacterial potency was also reduced. The m/z 558.8614 fragment (P1) and m/z 448.1323 fragment (P2) were identified as the primary products, which were formed by breaking glucosidic bonds and losing mycarose and forosamine for P1 and further mycaminose moiety for P2. Finally, production wastewater with 433 mg/L of spiramycin was effectively treated using this thermal-acid hydrolytic method. Spiramycin and its antibacterial potency both dropped to 0 after 6 min. The potency drop was supposed from the losing of mycarose and/or forosamine. To decrease both the concentration of spiramycin and its antibacterial potency, combinedly using STA and MW was suggested in this work to break down the structural bonds of the functional groups rather than to destroy the whole antibiotic molecules. It is promising for pretreating spiramycin-contained production wastewater to mitigate both the antibiotic and its antibacterial potency. (C) 2019 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/43110]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, State Key Lab Environm Aquat Chem, Res Ctr Ecoenvironm Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zheng,Dou, Xiaomin,Zhang, Yu,et al. Rapid thermal-acid hydrolysis of spiramycin by silicotungstic acid under microwave irradiation[J]. ENVIRONMENTAL POLLUTION,2019,249:36-44. |
| APA | Chen, Zheng,Dou, Xiaomin,Zhang, Yu,Yang, Min,&Wei, Dongbin.(2019).Rapid thermal-acid hydrolysis of spiramycin by silicotungstic acid under microwave irradiation.ENVIRONMENTAL POLLUTION,249,36-44. |
| MLA | Chen, Zheng,et al."Rapid thermal-acid hydrolysis of spiramycin by silicotungstic acid under microwave irradiation".ENVIRONMENTAL POLLUTION 249(2019):36-44. |
入库方式： OAI收割
来源：生态环境研究中心
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