Removal characteristics and mechanism of microplastics and tetracycline composite pollutants by coagulation process
文献类型：期刊论文
| 作者 | Lu, Sen; Liu, Libing; Yang, Qinxue; Demissie, Hailu; Jiao, Ruyuan ; An, Guangyu; Wang, Dongsheng
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-09-10 |
| 卷号 | 786页码:- |
| 关键词 | Microplastics (MPs) Tetracycline (TC) Composite pollutants Coagulation Complexation |
| ISSN号 | 0048-9697 |
| 英文摘要 | Water composite pollution is an increasingly severe challenge in the field of water treatment. Especially, microplastic is an emerging concerned pollutant in recent years for its persistent eco-environmental influence. Therefore, investigating the composite pollution effect and developing effective removal technology surrounding microplastic is an urgent task for future need. In this aspect, the removal of composite pollutants, microplastics (PET/weathered PET) and tetracycline (TC), was procedurally studied by coagulation with AlCl3. Based on the analysis of variance (ANOVA) and correlation of experimental data, the characterization of fourier transform infrared spectroscopy (FTIR), solid-state 27Al nuclear magnetic resonance (27Al NMR), X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) computation, the removal mechanism for coagulation was well discussed and proposed. It shows that the removal performance of individual PET and TC were mainly influenced by coordination reaction in forming Al-PET and Al-TC, corresponding to the removal rate of 100% and 28%, respectively. Charge neutralization and sweeping flocculation played an auxiliary role for PET removal. However, the weathered PET (WPET) exhibited worse removability (92%) than PET due to a sharp decrease in the hydrodynamic diameter of WPET. The poor removal of TC was induced by the formation of Al-TC which was difficult to transform into solid flocs. In regard to composite pollutants, the removal rate of PET was significantly decreased (91%) due to the low activity of TC in forming flocs and the complexation competition, while the removal of TC was greatly enhanced (41%). In this process of multilayered reaction among PET, TC and Al3+, Al3+ preferentially interacted with TC to form Al-TC, which was subsequently combined to PET to form the ternary complexes PET-AlTC, thus realizing the transformation from dissolved TC complexes to solid TC composites. This work is of great significance in understanding the interaction mechanism of composite pollutants in coagulation process. (c) 2021 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45988]  |
| 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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Yangtze River Delta Branch, Yiwu 322000, Zhejiang, Peoples R China 4.Arba Minch Univ, Dept Chem, Arba Minch 1000, Ethiopia 5.China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Sen,Liu, Libing,Yang, Qinxue,et al. Removal characteristics and mechanism of microplastics and tetracycline composite pollutants by coagulation process[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,786:-. |
| APA | Lu, Sen.,Liu, Libing.,Yang, Qinxue.,Demissie, Hailu.,Jiao, Ruyuan.,...&Wang, Dongsheng.(2021).Removal characteristics and mechanism of microplastics and tetracycline composite pollutants by coagulation process.SCIENCE OF THE TOTAL ENVIRONMENT,786,-. |
| MLA | Lu, Sen,et al."Removal characteristics and mechanism of microplastics and tetracycline composite pollutants by coagulation process".SCIENCE OF THE TOTAL ENVIRONMENT 786(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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