A novel waste activated sludge multistage utilization strategy for preparing carbon-based Fenton-like catalysts: Catalytic performance assessment and micro-interfacial mechanisms
文献类型：期刊论文
| 作者 | Ai, Jing; Zhang, Weijun; Liao, Guiying; Chen, Feifei; Wang, Dongsheng |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 150页码:473-487 |
| 关键词 | Waste activated sludge (WAS) Sludge-based carbons (SBC) Adsorption Catalysis |
| ISSN号 | 0043-1354 |
| 英文摘要 | Waste activated sludge (WAS) contains many anionic functional groups which can interact with heavy metal ions through electrostatic action and complexation reactions. The transition metals adsorbed in WAS can catalyze sludge pyrolysis in anaerobic conditions and improve structural properties of organic matter. In this work, a multistage WAS utilization process for preparing the carbon-based Fenton-like catalysis materials is proposed. More specifically, WAS is firstly used as an adsorbent for heavy metals (Cu and Ni) removal, and then complexes are converted into heterogeneous Fenton-like carbon-based catalysts through oxygen-free pyrolysis. The mechanisms of interactions between extracellular polymeric substances (EPS) and metals are investigated, and the physicochemical properties of sludge-based carbons (SBC) are comprehensively characterized using varies techniques. It is found that WAS is an excellent adsorbent for Cu and Ni removal, which is mainly due to the coordination and electrostatic interactions between EPS and heavy metals. Cu and Ni adsorbed in WAS significantly improved the porous structure of SBC. Both adsorption and catalytic oxidization of Cu/Ni-SBC contribute the removal of E2 in real wastewater. The E2 removal mechanism is explored by electron-spin resonance spectroscopy (ESR) analysis, and it is found that both of center dot O-2(-) and center dot OH radicals are responsible for E2 degradation in Cu(II)-SBC-H2O2, while center dot O-2(-) radicals contributes to E2 degradation in Ni(II)-SBC-H2O2 system, so the former performed better than the latter in total removal of E2. Besides, Cu(II) and Cu(I) are both formed in Cu(II)-SBC during the oxidation process, while only Ni(II) is found in the Ni(II)-SBC-H2O2 process, confirming that different catalytic oxidation reactions are occurred in the Cu(II)-SBC-H2O2 and Ni(II)-SBC-H2O2 processes. This study facilitates a great strategy to the sludge multi-stage circulating utilization and a better understanding about the role of the Cu/Ni existed in SBC during the estrogens removal process. (C) 2018 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/43054]  |
| 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.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China 3.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ai, Jing,Zhang, Weijun,Liao, Guiying,et al. A novel waste activated sludge multistage utilization strategy for preparing carbon-based Fenton-like catalysts: Catalytic performance assessment and micro-interfacial mechanisms[J]. WATER RESEARCH,2019,150:473-487. |
| APA | Ai, Jing,Zhang, Weijun,Liao, Guiying,Chen, Feifei,&Wang, Dongsheng.(2019).A novel waste activated sludge multistage utilization strategy for preparing carbon-based Fenton-like catalysts: Catalytic performance assessment and micro-interfacial mechanisms.WATER RESEARCH,150,473-487. |
| MLA | Ai, Jing,et al."A novel waste activated sludge multistage utilization strategy for preparing carbon-based Fenton-like catalysts: Catalytic performance assessment and micro-interfacial mechanisms".WATER RESEARCH 150(2019):473-487. |
入库方式： OAI收割
来源：生态环境研究中心
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