Enhanced hydrolysis of streptomycin from production wastewater using CaO/MgO solid base catalysts
文献类型：期刊论文
| 作者 | Tang, Mei; Dou, Xiaomin; Tian, Zhe; Yang, Min; Zhang, Yu
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2019 |
| 卷号 | 355页码:586-593 |
| ISSN号 | 1385-8947 |
| 关键词 | Streptomycin production wastewater Enhanced hydrolysis Antibacterial activity Solid base |
| 英文摘要 | In the present study, a heterogeneous catalytic hydrolysis system was developed to remove streptomycin and its antibacterial activity from an aqueous solution as well as a streptomycin production wastewater using a solid base catalyst by supporting CaO onto MgO (CaO/MgO). As compared to the traditional catalyst aqueous NaOH under the same aqueous conditions (pH = 10.3 +/- 0.1, 55 degrees C), the half-life (t(1/2)) of streptomycin in aqueous solution containing 20 mg L-1 of streptomycin was shortened from 7.22 h to 1.63 h in the presence of CaO/MgO-0.24. The result of temperature programmed desorption with CO2 (CO2-TPD) showed a strong positive correlation between the strong base sites (low-coordination O2- anions) on the CaO/MgO surface and streptomycin hydrolysis t(1/2) (r(2) = -0.943, p = 0.005). The underlying mechanism for the hydrolytic degradation was proposed using density functional theory (DFT) in combination with ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS). The surficial base sites of the catalyst attacked the two ether C-O bonds connected to the ring with the streptose structure of streptomycin, resulting in the formation of four hydrolysis products with far less antibacterial activity. The optimized CaO/MgO catalyst was used for the removal of streptomycin from the production wastewater containing 2218 mg L-1 of the target antibiotic and 10 178 mg L-1 of chemical oxygen demand (CODCr). It was found that 98% of streptomycin as well as its antibacterial activity was removed within 2 h with a catalyst dose of 15.0 g L-1. The CaO/MgO solid base catalyst exhibited a good application prospect in the pretreatment of antibiotic production wastewater. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/43083]  |
| 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, Beijing Key Lab Source Control Technol Water Poll, Coll Environm Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Mei,Dou, Xiaomin,Tian, Zhe,et al. Enhanced hydrolysis of streptomycin from production wastewater using CaO/MgO solid base catalysts[J]. CHEMICAL ENGINEERING JOURNAL,2019,355:586-593. |
| APA | Tang, Mei,Dou, Xiaomin,Tian, Zhe,Yang, Min,&Zhang, Yu.(2019).Enhanced hydrolysis of streptomycin from production wastewater using CaO/MgO solid base catalysts.CHEMICAL ENGINEERING JOURNAL,355,586-593. |
| MLA | Tang, Mei,et al."Enhanced hydrolysis of streptomycin from production wastewater using CaO/MgO solid base catalysts".CHEMICAL ENGINEERING JOURNAL 355(2019):586-593. |
入库方式： OAI收割
来源：生态环境研究中心
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