Enhanced removal of oxytetracycline antibiotics from water using manganese dioxide impregnated hydrogel composite: Adsorption behavior and oxidative degradation pathways
文献类型：期刊论文
| 作者 | Minale, Mengist; Guadie, Awoke; Li, Yuan; Meng, Yuan; Wang, Xuejiang; Zhao, Jianfu |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021 |
| 卷号 | 280页码:- |
| 关键词 | MnO2@PSA Oxytetracycline Adsorption Intermediate products Degradation pathways Mechanism |
| ISSN号 | 0045-6535 |
| 英文摘要 | The present work provides the first attempt of using manganese dioxide loaded poly(sodium acrylate) hydrogel (MnO2@PSA) to address potential threats posed by oxytetracycline (OTC) antibiotics in aqueous environment. The MnO2@PSA was prepared via a facile approach and demonstrated enhanced removal performance even under extremely high concentrations of OTC. The outstanding performance exhibited by MnO2@PSA was attributed to synergetic effects of adsorption oxidative degradation. The synthesized composite was characterized evaluated under varying conditions. The adsorption pH was optimized at pH 5, at which the removal efficiency OTC was reached 91.46%. According to the kinetics study, the pseudo-second-order kinetic model was the best to explain the adsorption data, implying the interaction mechanisms were dominated by chemisorption. The Langmuir isotherm model was the best to explain the isotherm data, and the corresponding maximum adsorbed amount of OTC was 1150.4 mg g(-1). The MnO2@PSA was highly selective for OTC adsorption and degradation under the presence of natural organic matter and common environmental metal ions. The oxidative degradation study indicated that OTC molecules were structurally degraded into 15 intermediate products via six reaction pathways. Both the theoretical models and spectroscopic methods demonstrated the removal mechanism of OTC onto MnO2@PSA was governed by ion exchange, cation-pi bonding, hydrogen-bonding, and pi-pi electron donor-acceptor. Overall, MnO2@PSA is an excellent and environmentally sustainable material to remove OTC from water and wastewater via the combined effects of adsorption and oxidative degradation. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46111]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China 2.Tongji Univ, Coll Environm Sci & Engn, Inst Environm Sustainable Dev, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China 3.Chinese Acad Sci, Key Lab Environm Biotechnol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 4.Arba Minch Univ, Coll Nat Sci, Dept Biol, Arba Minch 21, Ethiopia |
| 推荐引用方式 GB/T 7714 | Minale, Mengist,Guadie, Awoke,Li, Yuan,et al. Enhanced removal of oxytetracycline antibiotics from water using manganese dioxide impregnated hydrogel composite: Adsorption behavior and oxidative degradation pathways[J]. CHEMOSPHERE,2021,280:-. |
| APA | Minale, Mengist,Guadie, Awoke,Li, Yuan,Meng, Yuan,Wang, Xuejiang,&Zhao, Jianfu.(2021).Enhanced removal of oxytetracycline antibiotics from water using manganese dioxide impregnated hydrogel composite: Adsorption behavior and oxidative degradation pathways.CHEMOSPHERE,280,-. |
| MLA | Minale, Mengist,et al."Enhanced removal of oxytetracycline antibiotics from water using manganese dioxide impregnated hydrogel composite: Adsorption behavior and oxidative degradation pathways".CHEMOSPHERE 280(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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