globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2018.11.085
Scopus ID: 2-s2.0-85058543539
A novel waste activated sludge multistage utilization strategy for preparing carbon-based Fenton-like catalysts: Catalytic performance assessment and micro-interfacial mechanisms
Author: Ai J.; Zhang W.; Liao G.; Chen F.; Wang D.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2019
pages begin: 473
pages end: 487
Language: 英语
Keyword: Adsorption ; Catalysis ; Sludge-based carbons (SBC) ; Waste activated sludge (WAS)
Scopus Keyword: Adsorption ; Carbon ; Catalysis ; Catalysts ; Catalytic oxidation ; Complexation ; Electron spin resonance spectroscopy ; Electrostatics ; Heavy metals ; Magnetic moments ; Metal ions ; Nickel compounds ; Oxidation ; Pyrolysis ; Structural metals ; Transition metals ; Carbon based catalysts ; Catalytic performance ; Complexation reaction ; Extracellular polymeric substances ; Interfacial mechanism ; Physicochemical property ; Sludge-based carbons (SBC) ; Waste activated sludges ; Copper compounds ; carbon ; copper ; ferrous gluconate ; nickel ; activated carbon ; activated sludge ; adsorption ; anoxic conditions ; catalysis ; catalyst ; complexation ; exopolymer ; functional group ; heavy metal ; performance assessment ; pollutant removal ; waste technology ; activated sludge ; adsorption ; Article ; catalyst ; chemical structure ; electron spin resonance ; oxidation ; physical chemistry ; priority journal ; pyrolysis ; static electricity ; waste component removal ; X ray photoemission spectroscopy
English Abstract: 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.O 2 − and.OH radicals are responsible for E2 degradation in Cu(II)-SBC-H 2 O 2 , while.O 2 − radicals contributes to E2 degradation in Ni(II)-SBC-H 2 O 2 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-H 2 O 2 process, confirming that different catalytic oxidation reactions are occurred in the Cu(II)-SBC-H 2 O 2 and Ni(II)-SBC-H 2 O 2 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. © 2018 Elsevier Ltd
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被引频次[WOS]:1   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: Faculty Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei 430074, China; School of Environment Studies, China University of Geosciences, Wuhan, Hubei 430074, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

Recommended Citation:
Ai J.,Zhang W.,Liao G.,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,2019-01-01
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