1
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Gao Y, Wang P, Chu Y, Kang F, Cheng Y, Repo E, Feng M, Yu X, Zeng H. Redox property of coordinated iron ion enables activation of O 2 via in-situ generated H 2O 2 and additionally added H 2O 2 in EDTA-chelated Fenton reaction. WATER RESEARCH 2024; 248:120826. [PMID: 37976952 DOI: 10.1016/j.watres.2023.120826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/20/2023] [Accepted: 11/02/2023] [Indexed: 11/19/2023]
Abstract
The Fenton system was a generation system of reactive oxygen species via the chain reactions, which employed H2O2 and O2 as radical precursors and Fe2+/Fe3+ as electron-donor/acceptor for triggering or terminating the generation of radicals. Recent work mainly emphasized the Fe2+- activated H2O2 and the application of in-situ generated •OH, while neglecting other side-reactions. In this work, EDTA (Ethylene diamine tetraacetic acid) was employed as a chelating agent of iron ions, which simultaneously changed the redox property of coordinated iron. The Fe2+-EDTA complexes in the presence of dissolved oxygen enabled the two-electron transfer from Fe2+ to O2 and the in-situ production of H2O2, which further activate H2O2 for yielding •OH. Meanwhile, coordinated Fe3+ exhibited non-negligible reactivity toward H2O2, which was higher than that of free Fe3+ in the traditional Fenton system. The complexation of EDTA with Fe3+ could enhance the Fe2+ generation reaction by the H2O2, accompanied by the O2•- formation. The enhancement of O2•- formation and Fe2+-EDTA regeneration induced the subsequent H2O2 activation by Fe2+-EDTA, thus accelerating the Fe3+-EDTA/Fe2+-EDTA cycle for simultaneously producing O2•- and •OH. To sum up, the EDTA-chelated Fenton system extended the applicable pH range to circumneutral/alkaline level and tuned the redox property of coordinated iron for diversifying the •OH production routes. The research reinterpreted the chain reactions in the Fenton system, revealing another way to enhance the radical production or other property of the Fenton/Fenton-like system.
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Affiliation(s)
- Yuan Gao
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Pengyi Wang
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Yu Chu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Fan Kang
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Yue Cheng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Eveliina Repo
- Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), Lappeenranta FI-53850, Finland
| | - Mingbao Feng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China
| | - Xin Yu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China
| | - Huabin Zeng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China.
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2
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Li X, Song H, Zhang G, Zou W, Cao Z, Pan Y, Zhang G, Zhou M. Enhanced organic pollutant removal in saline wastewater by a tripolyphosphate-Fe 0/H 2O 2 system: Key role of tripolyphosphate and reactive oxygen species generation. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131821. [PMID: 37315414 DOI: 10.1016/j.jhazmat.2023.131821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/28/2023] [Accepted: 06/08/2023] [Indexed: 06/16/2023]
Abstract
The effects of tripolyphosphate (TPP) on organic pollutant degradation in saline wastewater using Fe0/H2O2 were systematically investigated to elucidate its mechanism and the main reactive oxygen species (ROS). Organic pollutant degradation was dependent on the Fe0 and H2O2 concentration, Fe0/TPP molar ratio, and pH value. The apparent rate constant (kobs) of TPP-Fe0/H2O2 was 5.35 times higher than that of Fe0/H2O2 when orange II (OGII) and NaCl were used as the target pollutant and model salt, respectively. The electron paramagnetic resonance (EPR) and quenching test results showed that •OH, O2•-, and 1O2 participated in OGII removal, and the dominant ROS were influenced by the Fe0/TPP molar ratio. The presence of TPP accelerates Fe3+/Fe2+ recycling and forms Fe-TPP complexes, which ensures sufficient soluble Fe for H2O2 activation, prevents excessive Fe0 corrosion, and thereby inhibits Fe sludge formation. Additionally, TPP-Fe0/H2O2/NaCl maintained a performance similar to those of other saline systems and effectively removed various organic pollutants. The OGII degradation intermediates were identified using high-performance liquid chromatography-mass spectrometry (HPLC-MS) and density functional theory (DFT), and possible degradation pathways for OGII were proposed. These findings provide a facile and cost-effective Fe-based AOP method for removing organic pollutants from saline wastewater.
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Affiliation(s)
- Xiang Li
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China.
| | - Huajing Song
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China
| | - Gaili Zhang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China
| | - Wei Zou
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China
| | - Zhigguo Cao
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China
| | - Yuwei Pan
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, PR China
| | - Guoqing Zhang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, Henan Engineering Laboratory of Environmental Functional Materials and Pollution Control, Xinxiang, Henan 453007, PR China
| | - Minghua Zhou
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
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3
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Wang Y, Huang D, Ge C, Wang X, Zhu C, Chen N, Fang G, Zhou D. Amendment of organic acids significantly enhanced hydroxyl radical production during oxygenation of paddy soils. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131799. [PMID: 37302186 DOI: 10.1016/j.jhazmat.2023.131799] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/07/2023] [Accepted: 06/05/2023] [Indexed: 06/13/2023]
Abstract
Recently, hydroxyl radical (•OH) production during soil redox fluctuations has been increasingly reported, but the low efficiency of contaminant degradation is the barrier for engineering remediation. The widely distributed low-molecular-weight organic acids (LMWOAs) might greatly enhance •OH production due to their strong interactions with Fe(II) species, but it was less investigated. Herein, we found that LMWOAs amendment (i.e., oxalic acid (OA) and citric acid (CA)) significantly enhanced •OH production by 1.2 -19.5 times during oxygenation of anoxic paddy slurries. Compared with OA and acetic acid (AA) (78.4 -110.3 μM), 0.5 mM CA showed the highest •OH accumulation (140.2 μM) due to the elevated electron utilization efficiency derived from its strongest capacity for complexation. Besides, increasing CA concentrations (within 6.25 mM) dramatically enhanced the •OH production and imidacloprid (IMI) degradation (increased by 48.6%), and further decreased due to the extensive competition from excess CA. Compared to 0.5 mM CA, the synergistic effects of acidification and complexation induced by 6.25 mM CA rendered more formation of exchangeable Fe(II) that easily coordinated with CA, and thus significantly enhanced its oxygenation. This study proposed promising strategies for regulating natural attenuation of contaminants using LMWOAs in agricultural fields, especially soils with frequent occurrence of redox fluctuations.
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Affiliation(s)
- Yixuan Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China
| | - Danyu Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China
| | - Chenghao Ge
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China
| | - Xiaolei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China
| | - Changyin Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China
| | - Ning Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China.
| | - Guodong Fang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 Jiangsu Province, PR China
| | - Dongmei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023 Jiangsu Province, PR China.
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4
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Zhang C, Kong C, Tratnyek PG, Qin C. Generation of Reactive Oxygen Species and Degradation of Pollutants in the Fe 2+/O 2/Tripolyphosphate System: Regulated by the Concentration Ratio of Fe 2+ and Tripolyphosphate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:4367-4376. [PMID: 35275631 DOI: 10.1021/acs.est.1c07467] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tripolyphosphate (TPP) has many advantages as a ligand for the optimization of the Fe2+/O2 system in environmental remediation applications. However, the relationship between remediation performance and the Fe2+/TPP ratio in the system has not been previously described. In this study, we report that the degradation mechanism of p-nitrophenol (PNP) in Fe2+/O2 systems is regulated by the Fe2+/TPP ratio under neutral conditions. The results showed that although PNP was effectively degraded at different Fe2+/TPP ratios, the results of specific reactive oxygen species (ROS) scavenging experiments and the determination of PNP degradation products showed that the mechanism of PNP degradation varies with the Fe2+/TPP ratio. When CFe2+ ≥ CTPP, the initially formed O2•- is converted to •OH and the •OH degrades PNP by oxidation. However, when CFe2+ < CTPP, the O2•- persists long enough to degrade PNP by reduction. Density functional theory (DFT) calculations revealed that the main reactive species of Fe2+ in the system include [Fe(TPP)(H2O)3]- and [Fe(TPP)2]4-, whose content in the solution is the key to achieve system regulation. Consequently, by controlling the Fe2+/TPP ratio in the solution, the degradation pathways of PNP can be selected. Our study proposed a new strategy to regulate the oxidation/reduction removal of pollutants by simply varying the Fe2+/TPP ratio of the Fe2+/O2 system.
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Affiliation(s)
- Chengwu Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
- Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China
- National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Chuipeng Kong
- Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
| | - Paul G Tratnyek
- OHSU-PSU School of Public Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, United States
| | - Chuanyu Qin
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
- Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China
- National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
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5
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Enhanced performance of Fe(III)/persulfate for the degradation of DEET: Working mechanism of ascorbic acid. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Saiz F, Bernasconi L. Density-functional theory models of Fe(iv)O reactivity in metal-organic frameworks: self-interaction error, spin delocalisation and the role of hybrid exchange. Phys Chem Chem Phys 2020; 22:12821-12830. [PMID: 32469348 DOI: 10.1039/d0cp01285h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We study the reactivity of Fe(iv)O moieties supported by a metal-organic framework (MOF-74) in the oxidation reaction of methane to methanol using all-electron, periodic density-functional theory calculations. We compare results concerning the electronic properties and reactivity obtained using two hybrid (B3LYP and sc-BLYP) and two standard generalised gradient corrected (PBE and BLYP) semi-local density functional approximations. The semi-local functionals are unable to reproduce the expected reaction profiles and yield a qualitatively incorrect representation of the reactivity. Non-local hybrid functionals provide a substantially more reliable description and predict relatively modest (ca. 60 kJ mol-1) reaction energy barriers for the H-atom abstraction reaction from CH4 molecules. We examine the origin of these differences and we highlight potential means to overcome the limitations of standard semi-local functionals in reactivity calculations in solid-state systems.
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Affiliation(s)
- Fernan Saiz
- Institut de Ciència de Materials de Barcelona (ICMAB), Spanish National Research Council (CSIC), Campus de la UAB, Bellaterra, 08193, Spain.
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7
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Szécsényi Á, Khramenkova E, Chernyshov IY, Li G, Gascon J, Pidko EA. Breaking Linear Scaling Relationships with Secondary Interactions in Confined Space: A Case Study of Methane Oxidation by Fe/ZSM-5 Zeolite. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01914] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ágnes Szécsényi
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- King Abdullah University of Science and Technology, KAUST Catalysis Center, Advanced Catalytic Materials, Thuwal 23955, Saudi Arabia
| | - Elena Khramenkova
- TheoMAT Group, ChemBio Cluster, ITMO University, Lomonosova Street 9, Saint Petersburg, 191002, Russian Federation
| | - Ivan Yu. Chernyshov
- TheoMAT Group, ChemBio Cluster, ITMO University, Lomonosova Street 9, Saint Petersburg, 191002, Russian Federation
| | - Guanna Li
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Jorge Gascon
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- King Abdullah University of Science and Technology, KAUST Catalysis Center, Advanced Catalytic Materials, Thuwal 23955, Saudi Arabia
| | - Evgeny A. Pidko
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- TheoMAT Group, ChemBio Cluster, ITMO University, Lomonosova Street 9, Saint Petersburg, 191002, Russian Federation
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8
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Olvera-Vargas H, Zheng X, Garcia-Rodriguez O, Lefebvre O. Sequential "electrochemical peroxidation - Electro-Fenton" process for anaerobic sludge treatment. WATER RESEARCH 2019; 154:277-286. [PMID: 30802702 DOI: 10.1016/j.watres.2019.01.063] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/21/2019] [Accepted: 01/30/2019] [Indexed: 05/03/2023]
Abstract
In this study, we present a sequential electrochemical process for integral treatment of anaerobic sludge, combining for the first time electrochemical peroxidation (ECP) and electro-Fenton (EF). In the first step, ECP (consisting of H2O2-assisted electrocoagulation with Fe electrodes) was applied as a conditioning and stabilizing method, whose synergistic electrocoagulation/Fenton oxidation effects considerably reduced the COD, TOC and total suspended solids (TSS) by 89.3%, 75.4% and 85.6%, respectively, under optimized conditions (initial pH of 5, [H2O2]/[Fe2+] dose ratio of 5, 15.38 mA cm-2 and 2 h treatment). Furthermore, total coliforms were completely killed within the first hour of treatment. In the second step, EF was successfully applied to mineralize the remaining organic fraction in the liquid effluent after dewatering, achieving 91.6% and 87.2% of COD and TOC removal, respectively, after 4 h of treatment under optimal conditions (pH 3 and 25 mA cm-2), while almost total COD and TOC removal was attained in 8 h. The Fe sludge generated at the end of the ECP treatment was easily dewatered by filtration and 20.9 g of nutrient-rich dry sludge were produced. The overall cost of the ECP-EF treatment was S$ 0.05 L-1 sludge. The combined effects of coagulation and Fenton oxidation during ECP revealed that the treatment efficiency is strongly dependent on the rheological properties of the sludge sample.
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Affiliation(s)
- H Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - X Zheng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - O Garcia-Rodriguez
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - O Lefebvre
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore.
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9
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Zou H, Ning XA, Wang Y, Sun J, Hong Y. Sono-advanced Fenton-like degradation of aromatic amines in textile dyeing sludge: efficiency and mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:7810-7820. [PMID: 30680685 DOI: 10.1007/s11356-019-04147-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
In this paper, a novel strategy integrating ultrasound (US) with a Fenton-like (zero-valent iron/EDTA/air, ZEA) process was proposed for the removal of the refractory and carcinogenic aromatic amines (AAs) in textile dyeing sludge for the first time. The operating condition was optimized as 1.08 W/cm3 ultrasonic density, 15 g/L ZVI, and 1.0 mM EDTA, which could reach degradation efficiencies of 51.79% in US, 72.88% in ZEA, and 92.40% in US/ZEA system after 90-min reaction. Quenching experiments showed that electron transfer reactions generated by the iron ligands in ZEA brought about various reactive oxidative species (ROS), in which Fe (IV), O2˙-, and ˙OH dominated the degradation. US induced sludge disintegration by ultrasonic shear, proven by particle size decrease and supernatant organic matter upsurge, which helps ROS contact with those pollutants in the sludge cavities. Besides, US facilitated the iron redox cycle for oxygen activation by promoting the corrosion of ZVI and stripping considerable ferric ions from sludge iron oxides which were verified by SEM, XRF, and XPS. Graphical abstract.
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Affiliation(s)
- Haiyuan Zou
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xun-An Ning
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Yi Wang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jian Sun
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yanxiang Hong
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
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10
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Saiz F, Bernasconi L. Electronic structure and reactivity of Fe(iv)oxo species in metal-organic frameworks. Phys Chem Chem Phys 2019; 21:4965-4974. [PMID: 30758369 DOI: 10.1039/c8cp07580h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We investigate the potential use of Fe(iv)oxo species supported on a metal-organic framework in the catalytic hydroxylation of methane to produce methanol. We use periodic density-functional theory calculations at the 6-31G**/B3LYP level of theory to study the electronic structure and chemical reactivity in the hydrogen abstraction reaction from methane in the presence of Fe(iv)O(oxo) supported on MOF-74. Our results indicate that the Fe(iv)O moiety in MOF-74 is characterised by a highly reactive (quintet) ground-state, with a distance between Fe(iv) and O(oxo) of 1.601 Å, consistent with other high-spin Fe(iv)O inorganic complexes in the gas phase and in aqueous solution. Similar to the latter systems, the highly electrophilic character (and thus the reactivity) of Fe(iv)O in MOF-74 is determined by the presence of a low-lying anti-bonding virtual orbital (3σ*), which acts as an electron acceptor in the early stages of the hydrogen atom abstraction from methane. We estimate an energy barrier for hydrogen abstraction of 50.77 kJ mol-1, which is comparable to the values estimated in other gas-phase and hydrated Fe(iv)O-based complexes with the ability to oxidise methane. Our findings therefore suggest that metal-organic frameworks can provide suitable supports to develop new solid-state catalysts for organic oxidation reactions.
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Affiliation(s)
- Fernan Saiz
- Institut de Ciència de Materials de Barcelona, Bellaterra, Barcelona, 08193, Spain.
| | - Leonardo Bernasconi
- Center for Research Computing, University of Pittsburgh, 312 Schenley Place, 4420 Bayard Street, Pittsburgh, PA 15260, USA.
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11
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Vitillo JG, Bhan A, Cramer CJ, Lu CC, Gagliardi L. Quantum Chemical Characterization of Structural Single Fe(II) Sites in MIL-Type Metal–Organic Frameworks for the Oxidation of Methane to Methanol and Ethane to Ethanol. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04813] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jenny G. Vitillo
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Connie C. Lu
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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12
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Szécsényi Á, Li G, Gascon J, Pidko EA. Unraveling reaction networks behind the catalytic oxidation of methane with H 2O 2 over a mixed-metal MIL-53(Al,Fe) MOF catalyst. Chem Sci 2018; 9:6765-6773. [PMID: 30310609 PMCID: PMC6113888 DOI: 10.1039/c8sc02376j] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 07/20/2018] [Indexed: 01/09/2023] Open
Abstract
Reaction paths underlying the catalytic oxidation of methane with H2O2 over an Fe containing MIL-53(Al) metal-organic framework were studied by periodic DFT calculations. Not only the activation of methane, but the full reaction network was considered, which includes the formation of the active site, the overoxidation of methane to CO2 and the decomposition of H2O2 to H2O and O2. Calculations indicate that the activation barrier for the initial activation of the Fe sites upon reaction with H2O2 is comparable to that of the subsequent C-H activation and also of the reaction steps involved in the undesirable overoxidation processes. The pronounced selectivity of the oxidation reaction over MIL-53(Al,Fe) towards the target mono-oxygenated CH3OH and CH3OOH products is attributed to the limited coordination freedom of the Fe species encapsulated in the extended octahedral [AlO6] structure-forming chains, which effectively prevents the direct overoxidation paths prior to product desorption from the active sites. Importantly, our computational analysis reveals that the active sites for the desired methane oxidation are able to much more efficiently promote the direct catalytic H2O2 decomposition reaction, rendering thus the current combination of the active site and the reactants undesirable for the prospective methane valorization process.
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Affiliation(s)
- Ágnes Szécsényi
- Inorganic Systems Engineering Group , Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands . ; Tel: +31 1527 81938
- Catalysis Engineering , Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , the Netherlands
| | - Guanna Li
- Inorganic Systems Engineering Group , Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands . ; Tel: +31 1527 81938
- Catalysis Engineering , Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , the Netherlands
| | - Jorge Gascon
- King Abdullah University of Science and Technology , KAUST Catalysis Center , Advanced Catalytic Materials , Thuwal 23955 , Saudi Arabia
| | - Evgeny A Pidko
- Inorganic Systems Engineering Group , Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands . ; Tel: +31 1527 81938
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13
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Szécsényi Á, Li G, Gascon J, Pidko EA. Mechanistic Complexity of Methane Oxidation with H 2O 2 by Single-Site Fe/ZSM-5 Catalyst. ACS Catal 2018; 8:7961-7972. [PMID: 30221027 PMCID: PMC6135593 DOI: 10.1021/acscatal.8b01672] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 07/10/2018] [Indexed: 12/28/2022]
Abstract
Periodic density functional theory (DFT) calculations were carried out to investigate the mechanism of methane oxidation with H2O2 over the defined Fe sites in Fe/ZSM-5 zeolite. The initial Fe site is modeled as a [(H2O)2-Fe(III)-(μO)2-Fe(III)-(H2O)2]2+ extraframework cluster deposited in the zeolite pore and charge-compensated by two anionic lattice sites. The activation of this cluster with H2O2 gives rise to the formation of a variety of Fe(III)-oxo and Fe(IV)-oxo complexes potentially reactive toward methane dissociation. These sites are all able to promote the first C-H bond cleavage in methane by following three possible reaction mechanisms: namely, (a) heterolytic and (b) homolytic methane dissociation as well as (c) Fenton-type reaction involving free OH radicals as the catalytic species. The C-H activation step is followed by formation of MeOH and MeOOH and regeneration of the active site. The Fenton-type path is found to proceed with the lowest activation barrier. Although the barriers for the alternative heterolytic and homolytic pathways are found to be somewhat higher, they are still quite favorable and are expected to be feasible under reaction conditions, resulting ultimately in MeOH and MeOOH products. H2O2 oxidant competes with CH4 substrate for the same sites. Since the oxidation of H2O2 to O2 and two [H+] is energetically more favorable than the C-H oxofunctionalization, the overall efficiency of the latter target process remains low.
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Affiliation(s)
- Ágnes Szécsényi
- Catalysis
Engineering Group, Chemical Engineering Department, and Inorganic Systems
Engineering Group, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- Catalysis
Center, Advanced Catalytic Materials, King
Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Guanna Li
- Catalysis
Engineering Group, Chemical Engineering Department, and Inorganic Systems
Engineering Group, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Jorge Gascon
- Catalysis
Center, Advanced Catalytic Materials, King
Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Evgeny A. Pidko
- Catalysis
Engineering Group, Chemical Engineering Department, and Inorganic Systems
Engineering Group, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- TheoMAT
Group, ITMO University, Lomonosova Street 9, St.
Petersburg 191002, Russia
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14
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Deng F, Olvera-Vargas H, Garcia-Rodriguez O, Qiu S, Yang J, Lefebvre O. The synergistic effect of nickel-iron-foam and tripolyphosphate for enhancing the electro-Fenton process at circum-neutral pH. CHEMOSPHERE 2018; 201:687-696. [PMID: 29547857 DOI: 10.1016/j.chemosphere.2018.02.186] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 06/08/2023]
Abstract
A composite nickel-iron-foam (Ni-Fe-F) electrode was used as a cathode in the electro-Fenton (EF) process at circum-neutral pH in the presence of sodium tripolyphosphate (TPP) as supporting electrolyte. It was found that phenol degradation was dramatically improved by the synergistic effect of Ni-Fe-F and TPP, reaching 100% removal in 40 min, with kapp = (8.90 ± 0.12) × 10-2 min-1, which was about 18 times higher than that of Ni-Fe-F with sulfate as conventional electrolyte at pH 3.00 (kapp = (5.00 ± 0.14) × 10-3 min-1). A (75.00 ± 1.67)% mineralization yield was attained after 4-h treatment time. Ni-Fe-F proved capable of providing the Fe2+ ions necessary to catalyze the Fenton's reaction via a controlled chemical/electrochemical redox process. In addition, Ni-Fe-F promoted the chemical and electrochemical generation of H2O2. With respect to TPP, its chelation with Fe ions prevented iron precipitation at neutral and higher pH values, extending the pH range of the Fenton's reaction. Furthermore, the TPP ligand promoted the activation of molecular O2 for the chemical production of OH, enhancing the process efficiency. By overcoming these common limitations of conventional EF in K2SO4 electrolyte, the Ni-Fe-F/TPP system represents a more sustainable alternative for practical application of EF. A degradation pathway for phenol mineralization with homogeneous and heterogeneous OH produced by the EF Ni-Fe-F/TPP system is proposed based on the identification of the oxidation by-products.
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Affiliation(s)
- Fengxia Deng
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China; Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore, 117576, Singapore
| | - Hugo Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore, 117576, Singapore
| | - Orlando Garcia-Rodriguez
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore, 117576, Singapore
| | - Shan Qiu
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
| | - Jixian Yang
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Olivier Lefebvre
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore, 117576, Singapore.
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15
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Zhang LL, Wang XY, Jiang KY, Zhao BY, Yan HM, Zhang XY, Zhang ZX, Guo Z, Che CM. A theoretical study on the oxidation of alkenes to aldehydes catalyzed by ruthenium porphyrins using O 2 as the sole oxidant. Dalton Trans 2018; 47:5286-5297. [PMID: 29569676 DOI: 10.1039/c8dt00614h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Density functional theory (DFT) calculations were used to study the ruthenium porphyrin-catalyzed oxidation of styrene to generate an aldehyde. The results indicate that two reactive oxidants, dioxoruthenium and monooxoruthenium-superoxo porphyrins, participate in the catalytic oxidation. In the mechanism, the resultant monooxoruthenium porphyrin acts in the tandem epoxide isomerization (E-I) to selectively yield an aldehyde and generate a dioxoruthenium porphyrin, thereby triggering new oxidation reaction cycles. In this calculation, several key elements responsible for the observed oxidative ability have been established by using Frontier molecular orbital (FMO) theory, natural bond orbital (NBO) analysis, etc., which include the reaction energy, the spin exchange effect, the spin-state conversion process, and the energy level of the lowest unoccupied molecular orbitals (LUMOs) of the reactive oxidants. The comparative oxidative abilities of the ruthenium-oxo/superoxo compounds with different axial ligands are also investigated. The results suggest that the ruthenium-oxo/superoxo species featuring a chlorine axial ligand is more reactive than that substituted with oxygen. This tuneable reactivity can be understood when considering the different electronic characters of the two ligands and the effective atomic number rule (EAN).
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Affiliation(s)
- Lin-Lin Zhang
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Xiang-Yun Wang
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Kun-Yao Jiang
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Bing-Yuan Zhao
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Hui-Min Yan
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Xiao-Yun Zhang
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Zhu-Xia Zhang
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Zhen Guo
- College of Material Science & Engineering, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Shanxi, 030024, P. R. China.
| | - Chi-Ming Che
- Department of Chemistry, the University of Hong Kong, Hong Kong, P. R. China.
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16
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Zhou T, Feng K, Xiang W, Lv Y, Wu X, Mao J, He C. Rapid decomposition of diclofenac in a magnetic field enhanced zero-valent iron/EDTA Fenton-like system. CHEMOSPHERE 2018; 193:968-977. [PMID: 29874773 DOI: 10.1016/j.chemosphere.2017.11.090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/04/2017] [Accepted: 11/18/2017] [Indexed: 06/08/2023]
Abstract
In this study, significant synergistic degradation of antibiotic diclofenac (DCF) was demonstrated in a novel magnetic field (MF) enhanced zero-valent iron (ZVI)/EDTA Fenton-like system. Five operational parameters, namely, initial ZVI loading, pH, EDTA dosage, DCF concentration and reaction temperature, were investigated for their effects on the DCF degradation. OH was identified as the predominant reactive oxygen species for DCF degradation in ZVI/EDTA systems whether in the presence or absence of MF. DCF molecule can be oxidized by OH, attacking via the hydroxylation and substituted dechlorination of the chlorinated aromatic ring, as well as by dehydration between the N atom and the acetoxyl. It could also be directly dechlorinated by ZVI reduction simultaneously. The reaction mechanism and promotional role of MF in the MF/ZVI/EDTA system were proposed. It is suggested that MF mainly alters the heterogeneous ZVI surface-bond reactions and accelerates the surface corrosion depending on the presence of pristine iron oxides layer, but MF does not change the homogeneous iron cycle and the Fenton-like reactions.
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Affiliation(s)
- Tao Zhou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
| | - Ke Feng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Wei Xiang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Yiliang Lv
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Xiaohui Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Juan Mao
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Chang He
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
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17
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Zhou T, Zou X, Wu X, Mao J, Wang J. Synergistic degradation of antibiotic norfloxacin in a novel heterogeneous sonochemical Fe 0/tetraphosphate Fenton-like system. ULTRASONICS SONOCHEMISTRY 2017; 37:320-327. [PMID: 28427639 DOI: 10.1016/j.ultsonch.2017.01.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 01/12/2017] [Accepted: 01/12/2017] [Indexed: 06/07/2023]
Abstract
In this study, synergistic degradation of antibiotic norfloxacin (NOR) was obtained in a novel sonochemical ultrasound/zero-valent iron/tetraphosphate system (US/ZVI/TPP). Compared to three common organic ligands (EDTA, EDDS, and DTPA), TPP could perform more excellently in activation of O2 to produce reactive oxidative species (ROS) and lead to efficient Fenton-like oxidative degradation of NOR in the sonochemical in situ chemical oxidation (ISCO) system. An optimized initial condition was obtained as 10mg/L NOR, 0.3mM TPP, 1g/L ZVI and initial pH 7, and the US/ZVI/TPP system would effectively degrade NOR with relative low dosage of ZVI and ligand as well as broad pH work range 3-9. It was found that three ROS (OH, O2- and H2O2) instead of OH only would participate in the NOR degradation, while the in situ generation of H2O2 during the series of Fe-TPP reactions should be more critical. Fourteen organic intermediates and four inorganic products were detected during the NOR decomposition, suggesting that two main degradation pathways would occur under OH oxidation via cleavage of the piperazine ring and defluorination of the benzene ring, respectively. Finally, an integrated reaction mechanism in the US/ZVI/TPP system was proposed including solid-liquid interfacial iron corrosion as well as bulk homogenous oxygen activation and Fenton reactions, wherein US would play mechanically and chemically promotional roles. Besides, triple-repeated treatments suggested the relative long-term re-usage of ZVI particles and low effluent dissolved iron (<0.6mg/L).
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Affiliation(s)
- Tao Zhou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Xiaoli Zou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Xiaohui Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China; Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Wuhan 430074, PR China
| | - Juan Mao
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China; Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Wuhan 430074, PR China
| | - Jia Wang
- SIIC Environmental Holdings (Wuhan) Co. Ltd., Wuhan 430074, PR China
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18
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Bernasconi L, Kazaryan A, Belanzoni P, Baerends EJ. Catalytic Oxidation of Water with High-Spin Iron(IV)–Oxo Species: Role of the Water Solvent. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00568] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Leonardo Bernasconi
- STFC
Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom
| | - Andranik Kazaryan
- Theoretical
Chemistry Section, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Paola Belanzoni
- Department
of Chemistry, Biology and Biotechnology, University of Perugia and Institute of Molecular Science and Technologies (ISTM-CNR), Via Elce
di Sotto 8, I-06123 Perugia, Italy
| | - Evert Jan Baerends
- Theoretical
Chemistry Section, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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19
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Augustyniak AW, Suchecki TT, Kumazawa H. Reactivity of nano-size zinc powder in the aqueous solution of [Fe III(edta)(H 2O)] . ENVIRONMENTAL TECHNOLOGY 2017; 38:103-107. [PMID: 27227652 DOI: 10.1080/09593330.2016.1186745] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
Nitrogen mono-oxide and sulfur dioxide can be removed by simultaneous absorption into aqueous mixed solutions of sulfite and [FeII(edta)]H2O)]2-, ferrous ion coordinated to an anion of ethylene-diaminetetraacetic acid (EDTA or edta). In the industrial system with coexisting oxygen in the gas phase, [FeII(edta)](H2O)]2- complex is oxidized to [FeIII(edta)](H2O)]- by molecular oxygen. Because the ferric complex has no capability for reaction with NO, the suppression of this undesired oxidation process is a very important technological problem to be overcome. In our preceding work, we discussed the reduction kinetics of ferric ion by metal powder on the basis of the kinetic data regarding the ferric ion reduction in aqueous solutions of [FeIII(edta)](H2O)]- containing aluminum, tin or zinc powders. Zinc powder of normal size was recognized as an effective reducing agent. In the present work, augmentation of reducing capability of zinc powder was examined more. The rate of reduction of nano-size zinc powder was found to be about 11 times higher than that of normal-size zinc one.
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Affiliation(s)
| | - Tomasz T Suchecki
- b Faculty of Environmental Engineering , Wroclaw University of Technology , Wrocław , Poland
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20
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Lee H, Lee HJ, Seo J, Kim HE, Shin YK, Kim JH, Lee C. Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8231-8238. [PMID: 27387011 DOI: 10.1021/acs.est.6b02067] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study reports that the combination of Cu(II) with hydroxylamine (HA) (referred to herein as Cu(II)/HA system) in situ generates H2O2 by reducing dissolved oxygen, subsequently producing reactive oxidants through the reaction of Cu(I) with H2O2. The external supply of H2O2 to the Cu(II)/HA system (i.e., the Cu(II)/H2O2/HA system) was found to further enhance the production of reactive oxidants. Both the Cu(II)/HA and Cu(II)/H2O2/HA systems effectively oxidized benzoate (BA) at pH between 4 and 8, yielding a hydroxylated product, p-hydroxybenzoate (pHBA). The addition of a radical scavenger, tert-butyl alcohol, inhibited the BA oxidation in both systems. However, electron paramagnetic resonance (EPR) spectroscopy analysis indicated that (•)OH was not produced under either acidic or neutral pH conditions, suggesting that the alternative oxidant, cupryl ion (Cu(III)), is likely a dominant oxidant.
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Affiliation(s)
- Hongshin Lee
- Department of Chemical and Environmental Engineering, Yale University , New Haven, Connecticut 06511, United States
- School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Hye-Jin Lee
- School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Jiwon Seo
- School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Hyung-Eun Kim
- School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Yun Kyung Shin
- Southeast Sea Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI) , 397-68 Sanyangilju-ro, Tongyeong-si, Gyeongsangnam-do 53085, Republic of Korea
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering, Yale University , New Haven, Connecticut 06511, United States
| | - Changha Lee
- School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea
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21
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Hou X, Shen W, Huang X, Ai Z, Zhang L. Ascorbic acid enhanced activation of oxygen by ferrous iron: A case of aerobic degradation of rhodamine B. JOURNAL OF HAZARDOUS MATERIALS 2016; 308:67-74. [PMID: 26808244 DOI: 10.1016/j.jhazmat.2016.01.031] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 01/05/2016] [Accepted: 01/12/2016] [Indexed: 06/05/2023]
Abstract
Molecular oxygen activation by ferrous ions (Fe(II)) in aqueous solution could generate reactive oxygen species (ROS) with high oxidation potential via reaction between Fe(II) and oxygen molecules (Fe(II)/air), however, ROS yielded in the Fe(II)/air process is insufficient for removal of organic pollutants due to the irreversible ferric ions (Fe(III)) accumulation. In this study, we demonstrate that ascorbic acid (AA) could enhance ROS generation via oxygen activation by ferrous irons (AA/Fe(II)/air) and thus improve the degradation of rhodamine (RhB) significantly. It was found that the first-order aerobic degradation rate of RhB in the AA/Fe(II)/air process in the presence of ascorbic acid is more than 4 times that of the Fe(II)/Air system without adding ascorbic acid. The presence of ascorbic acid could relieve the accumulation of Fe(III) by reductive accelerating the Fe(III)/Fe(II) cycles, as well as lower the redox potential of Fe(III)/Fe(II) through chelating effect, leading to enhanced ROS generation for promoting RhB degradation. This study not only sheds light on the effect of ascorbic acid on aerobic Fe(II) oxidation, but also provides a green method for effective remediation of organic pollutants.
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Affiliation(s)
- Xiaojing Hou
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Wenjuan Shen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Xiaopeng Huang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan 430079, PR China
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22
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Kim HH, Lee H, Kim HE, Seo J, Hong SW, Lee JY, Lee C. Polyphosphate-enhanced production of reactive oxidants by nanoparticulate zero-valent iron and ferrous ion in the presence of oxygen: Yield and nature of oxidants. WATER RESEARCH 2015; 86:66-73. [PMID: 26093796 DOI: 10.1016/j.watres.2015.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 06/05/2015] [Accepted: 06/08/2015] [Indexed: 06/04/2023]
Abstract
The production of reactive oxidants from nanoparticulate zero-valent iron (nZVI) and ferrous ion (Fe(II)) in the presence of oxygen was greatly enhanced by the addition of tetrapolyphosphate (TPP) as an iron-chelating agent. Compared to other ligands, TPP exhibited superior activity in improving the oxidant yields. The nZVI/TPP/O2 and the Fe(II)/TPP/O2 systems showed similar oxidant yields with respect to the iron consumed, indicating that nZVI only serves as a source of Fe(II). The degradation efficacies of selected organic compounds were also similar in the two systems. It appeared that both hydroxyl radical (OH) and ferryl ion (Fe(IV)) are produced, and OH dominates at acidic pH. However, at pH > 6, little occurrence of hydroxylated oxidation products suggests that Fe(IV) is a dominant oxidant. The degradation rates of selected organic compounds by the Fe(II)/TPP/O2 system had two optimum points at pH 6 and 9, and these pH-dependent trends are likely attributed to the speciation of Fe(IV) with different reactivities.
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Affiliation(s)
- Hak-Hyeon Kim
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea
| | - Hongshin Lee
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea
| | - Hyung-Eun Kim
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea
| | - Jiwon Seo
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea
| | - Seok Won Hong
- Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14 gil, Seongbuk-gu, Seoul, 136-791, Republic of Korea
| | - Jeong-Yong Lee
- Southeast Sea Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI), 397-68, Sanyangilju-ro, Sanyang-eup, Tongyeong-si, Gyeongsangnam-do, 650-943, Republic of Korea
| | - Changha Lee
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea.
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23
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Suchecki TT, Mathews B, Augustyniak AW, Kumazawa H. Applied Kinetics Aspects of Ferric EDTA Complex Reduction with Metal Powder. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502100h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomasz T. Suchecki
- Faculty of Environmental Engineering, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-379 Wroclaw, Poland
| | - Barbara Mathews
- Institute of Environmental Engineering, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland
| | - Adam W. Augustyniak
- Faculty of Environmental Engineering, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-379 Wroclaw, Poland
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24
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Cao M, She Y, Fu H, Yu Y, Li H, Wang T. Rate-limiting step of the iron porphyrin-catalysed oxidation of cyclohexane to adipic acid by DFT method. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2013.875171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Wang L, Wang F, Li P, Zhang L. Ferrous–tetrapolyphosphate complex induced dioxygen activation for toxic organic pollutants degradation. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.10.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Bernasconi L, Baerends EJ. A Frontier Orbital Study with ab Initio Molecular Dynamics of the Effects of Solvation on Chemical Reactivity: Solvent-Induced Orbital Control in FeO-Activated Hydroxylation Reactions. J Am Chem Soc 2013; 135:8857-67. [DOI: 10.1021/ja311144d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Leonardo Bernasconi
- STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX,
United Kingdom
| | - Evert Jan Baerends
- Theoretical
Chemistry Section, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081
HV Amsterdam, The Netherlands
- WCU program at Department of Chemistry, Pohang University of Science and Technology, Pohang
790-784, South Korea
- Chemistry
Department, Faculty
of Science, King Abdulaziz University,
Jeddah 21589, Saudi Arabia
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Gopakumar G, Belanzoni P, Baerends EJ. Hydroxylation catalysis by mononuclear and dinuclear iron oxo catalysts: a methane monooxygenase model system versus the Fenton reagent Fe(IV)O(H2O)5(2+). Inorg Chem 2011; 51:63-75. [PMID: 22221279 DOI: 10.1021/ic200754w] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydroxylation of aliphatic C-H bonds is a chemically and biologically important reaction, which is catalyzed by the oxidoiron group FeO(2+) in both mononuclear (heme and nonheme) and dinuclear complexes. We investigate the similarities and dissimilarities of the action of the FeO(2+) group in these two configurations, using the Fenton-type reagent [FeO(2+) in a water solution, FeO(H(2)O)(5)(2+)] and a model system for the methane monooxygenase (MMO) enzyme as representatives. The high-valent iron oxo intermediate MMOH(Q) (compound Q) is regarded as the active species in methane oxidation. We show that the electronic structure of compound Q can be understood as a dimer of two Fe(IV)O(2+) units. This implies that the insights from the past years in the oxidative action of this ubiquitous moiety in oxidation catalysis can be applied immediately to MMOH(Q). Electronically the dinuclear system is not fundamentally different from the mononuclear system. However, there is an important difference of MMOH(Q) from FeO(H(2)O)(5)(2+): the largest contribution to the transition state (TS) barrier in the case of MMOH(Q) is not the activation strain (which is in this case the energy for the C-H bond lengthening to the TS value), but it is the steric hindrance of the incoming CH(4) with the ligands representing glutamate residues. The importance of the steric factor in the dinuclear system suggests that it may be exploited, through variation in the ligand framework, to build a synthetic oxidation catalyst with the desired selectivity for the methane substrate.
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Affiliation(s)
- G Gopakumar
- Theoretische Chemie, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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Bernasconi L, Belanzoni P, Baerends EJ. An abiotic analogue of the diiron(iv)oxo “diamond core” of soluble methane monooxygenase generated by direct activation of O2 in aqueous Fe(ii)/EDTA solutions: thermodynamics and electronic structure. Phys Chem Chem Phys 2011; 13:15272-82. [DOI: 10.1039/c1cp21244c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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