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Author

Deli Wu

Bio: Deli Wu is an academic researcher from Tongji University. The author has contributed to research in topics: Radical & Catalysis. The author has an hindex of 26, co-authored 112 publications receiving 2513 citations.


Papers
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Journal ArticleDOI
Yong Feng1, Deli Wu2, Yu Deng1, Tong Zhang1, Kaimin Shih1 
TL;DR: Copper-iron bimetallic oxides have shown great potential for powerful radical production by activating peroxides and CuFeO2 rhombohedral crystals were synthesized and used as heterogeneous catalysts for peroxymonosulfate (PMS) activation under various conditions.
Abstract: Copper–iron bimetallic oxides have shown great potential for powerful radical production by activating peroxides. In this work, CuFeO2 rhombohedral crystals (RCs) were synthesized and used as heterogeneous catalysts for peroxymonosulfate (PMS) activation under various conditions. Sulfadiazine, a widely used veterinary sulfonamide, was used as a target pollutant to evaluate the efficiency of this combination. The results showed that of all the catalysts tested, the CuFeO2 RCs had the greatest reactivity. Under conditions of 0.1 g L–1 CuFeO2 RCs and 33.0 μM PMS, the nearly complete degradation of sulfadiazine occurred within 24 min. A synergistic catalytic effect was found between solid Cu(I) and Fe(III), probably due to the accelerated reduction of Fe(III). The two activation stages that produced different radicals (hydroxyl radicals followed by sulfate radicals) existed when solid Cu(I) was used as the catalyst. The CuFeO2 RCs had a higher PMS utilization efficiency than CuFe2O4, probably because the Cu(I...

530 citations

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TL;DR: In this paper, the authors used spinel nanoparticles (NPs) synthesized using a solvothermal method to activate peroxymonosulfate (PMS) with sulfamethazine (SMZ) as the target pollutant.

256 citations

Journal ArticleDOI
TL;DR: The developed kinetic model successfully simulated PMSO loss, PMSO2 production, SMX degradation, and/or PMS decomposition under varying conditions, which further supported the proposed mechanism.
Abstract: Sulfate radical (SO4•–) is widely recognized as the predominant species generated from the cobalt(II)-activated peroxymonosulfate (PMS) process. However, in this study, it was surprisingly found th...

223 citations

Journal ArticleDOI
TL;DR: In this paper, the surface Fe(II) species activated persulfate (PS) to produce OHads and SO4 −ads, controlled by surface reaction and diffusion, whereas OHfree and SO 4 −free diffusing from the FeS surface were mainly responsible for PS degradation.

209 citations

Journal ArticleDOI
Hongying Zhao1, Lin Qian1, Xiaohong Guan1, Deli Wu1, Guohua Zhao1 
TL;DR: Novel iron-copper-carbon aerogel was fabricated through a one-step process from metal-resin precursors and then activated with CO2 and N2 in environmentally friendly way and exhibited higher mineralization efficiency than homogeneous EF technology.
Abstract: Novel iron–copper–carbon (FeCuC) aerogel was fabricated through a one-step process from metal-resin precursors and then activated with CO2 and N2 in environmentally friendly way. The activated FeCuC aerogel was applied in a heterogeneous electro-Fenton (EF) process and exhibited higher mineralization efficiency than homogeneous EF technology. High total organic carbon (TOC) removal of organic pollutants with activated FeCuC aerogel was achieved at a wide range of pH values (3–9). The chemical oxygen demand (COD) of real dyeing wastewater was below China’s discharge standard after 30 min of treatment, and the specific energy consumption was low (9.2 kW·h·kg–1COD–1), corresponding to a power consumption of only ∼0.34 kW·h per ton of wastewater. The enhanced mineralization efficiency of FeCuC aerogel was mostly attributable to ultradispersed metallic Fe–Cu nanoparticles embedded in 3D carbon matrix and the CO2–N2 treatment. The CO2 activation enhanced the accessibility of the aerogel’s pores, and the seconda...

191 citations


Cited by
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Journal ArticleDOI
TL;DR: Sulfate radical-based advanced oxidation processes (AOPs) have received increasing attention in recent years due to their high capability and adaptability for the degradation of emerging contaminants as mentioned in this paper.

2,267 citations

01 Jan 2011

2,117 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide a state-of-the-art review on the development in heterogeneous catalysts including single metal, mixed metal, and nonmetal carbon catalysts for organic contaminants removal, with particular focus on peroxymonosulfate (PMS) activation.
Abstract: Sulfate radical-based advanced oxidation processes (SR-AOPs) employing heterogeneous catalysts to generate sulfate radical (SO4 −) from peroxymonosulfate (PMS) and persulfate (PS) have been extensively employed for organic contaminant removal in water. This article aims to provide a state–of–the–art review on the recent development in heterogeneous catalysts including single metal, mixed metal, and nonmetal carbon catalysts for organic contaminants removal, with particular focus on PMS activation. The hybrid heterogeneous catalyst/PMS systems integrated with other advanced oxidation technologies is also discussed. Several strategies for the identification of principal reactive radicals in SO4 −–oxidation systems are evaluated, namely (i) use of chemical probe or spin trapping agent coupled with analytical tools, and (ii) competitive kinetic approach using selective radical scavengers. The main challenges and mitigation strategies pertinent to the SR-AOPs are identified, which include (i) possible formation of oxyanions and disinfection byproducts, and (ii) dealing with sulfate produced and residual PMS. Potential future applications and research direction of SR-AOPs are proposed. These include (i) novel reactor design for heterogeneous catalytic system based on batch or continuous flow (e.g. completely mixed or plug flow) reactor configuration with catalyst recovery, and (ii) catalytic ceramic membrane incorporating SR-AOPs.

1,802 citations

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TL;DR: Recommendations regarding the use of the EEO concept, including the upscaling of laboratory results, were derived from an extensive analysis of studies reported in the peer-reviewed literature enabling a critical comparison of various established and emerging AOPs based on electrical energy per order (EEO) values.

1,677 citations