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Tao Y, Su M, Duan Z, Han L, Sun K. Structural and physical properties of trichloroethylene under an external electric field. J PHYS ORG CHEM 2021. [DOI: 10.1002/poc.4269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yaping Tao
- College of Physics and Electronic Information, Key Laboratory of Electromagnetic Transformation and Detection of Henan Province Luoyang Normal University Luoyang China
| | - Mingzhu Su
- College of Physics and Electronic Information, Key Laboratory of Electromagnetic Transformation and Detection of Henan Province Luoyang Normal University Luoyang China
| | - Zhixia Duan
- College of Physics and Electronic Information, Key Laboratory of Electromagnetic Transformation and Detection of Henan Province Luoyang Normal University Luoyang China
| | - Ligang Han
- College of Physics and Electronic Information, Key Laboratory of Electromagnetic Transformation and Detection of Henan Province Luoyang Normal University Luoyang China
| | - Kexi Sun
- College of Physics and Electronic Information, Key Laboratory of Electromagnetic Transformation and Detection of Henan Province Luoyang Normal University Luoyang China
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2
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Ultrasound aided heterogeneous Fenton degradation of Acid Blue 15 over green synthesized magnetite nanoparticles. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118230] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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3
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Nanoscale Zero-Valent Iron Supported on Carbon Nitride as a Peroxymonosulfate Activator for the Efficient Degradation of Paraxylene. Catal Letters 2021. [DOI: 10.1007/s10562-021-03596-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Electrochemical/Peroxymonosulfate/NrGO-MnFe2O4 for Advanced Treatment of Landfill Leachate Nanofiltration Concentrate. WATER 2021. [DOI: 10.3390/w13040413] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A simple one-pot method was used to successfully embed manganese ferrite (MnFe2O4) nanoparticles on the nitrogen-doped reduced graphene oxide matrix (NrGO), which was used to activate peroxymonosulfate to treat the landfill leachate nanofiltration concentration (LLNC) with electrochemical enhancement. NrGO-MnFe2O4 and rGO-MnFe2O4 were characterized by various means. This indicates that nitrogen-doped could induce more graphene oxide (GO) spall and reduction to produce more active centers, and was favorable for uniformly loading MnFe2O4 particles. The comparison between electrochemical/peroxymonosulfate/NrGO-MnFe2O4 (EC/PMS/NrGO-MnFe2O4) system and different catalytic systems shows that electrochemical reaction, NrGO and MnFe2O4 can produce synergies, and the chemical oxygen demand (COD) removal rate of LLNC can reach 72.89% under the optimal conditions. The three-dimensional (3D-EEM) fluorescence spectrum shows that the system has a strong treatment effect on the macromolecules with intense fluorescence emission in LLNC, such as humic acid, and degrades into substances with weak or no fluorescence characteristics. Gas chromatography-mass spectrometry (GC-MS) indicates that the complex structure of refractory organic compounds can be simplified, while the simple small molecular organic compounds can be directly mineralized. The mechanism of catalytic degradation of the system was preliminarily discussed by the free radical quenching experiment. Therefore, the EC/PMS/NrGO-MnFe2O4 system has significant application potential in the treatment of refractory wastewater.
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Benramdane IK, Nasrallah N, Amrane A, Kebir M, Trari M, Fourcade F, Assadi AA, Maachi R. Optimization of the artificial neuronal network for the degradation and mineralization of amoxicillin photoinduced by the complex ferrioxalate with a gradual and progressive approach of the ligand. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Yan J, Yang L, Qian L, Han L, Chen M. Nano-magnetite supported by biochar pyrolyzed at different temperatures as hydrogen peroxide activator: Synthesis mechanism and the effects on ethylbenzene removal. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114020. [PMID: 32066062 DOI: 10.1016/j.envpol.2020.114020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/14/2020] [Accepted: 01/17/2020] [Indexed: 06/10/2023]
Abstract
Nano-magnetite supported by biochar (nFe3O4/BC) pyrolyzed at temperatures of 300 °C-600 °C was developed to activate hydrogen peroxide (H2O2) for the efficient degradation of ethylbenzene in aqueous solution. It was revealed that the degradation efficiency of ethylbenzene and TOC removal were 96.9% and 36.2% respectively after the reaction for 40 min in the presence of initial concentration of 0.1 mmol L-1 ethylbenzene, 2.76 g L-1 nFe3O4/BC500 with the mass ratio of nFe3O4 to BC500 of 4:1 and 2.0 mmol L-1 H2O2 at pH 7.0. Based on electron paramagnetic resonance (EPR), quenching experiment and X-ray photoelectron spectroscopy (XPS) data, both OH and O2- radicals were generated in the nFe3O4/BC500 activated H2O2 system, and the OH radicals were the predominant species for the degradation of ethylbenzene. Through electron transfer process, mechanisms of Fe(II), phenolic hydroxyl group and persistent free radicals (PFRs) on BC surfaces accounted for the generation of OH radicals, and Fe(III) in nFe3O4 and formed from Fe(II) oxidation responsible for the generation of O2- radicals in the nFe3O4/BC activated H2O2 system were proposed.
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Affiliation(s)
- Jingchun Yan
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lei Yang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Linbo Qian
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Lu Han
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Mengfang Chen
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
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7
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Singh RK, Dhiman A, Chaudhary S, Prasad DN, Kumar S. Current Progress in the Multicomponent Catalytic Synthesis of Amidoalkyl- Naphthols: An Update. CURR ORG CHEM 2020. [DOI: 10.2174/1385272822666200217100344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Amidoalkyl-2-naphthol is one of the vital synthetic intermediates which occupy
an imperative position in medicinal chemistry due to its amazing biological, pharmacological
as well as industrial and synthetic applications. Owing to its diverse pharmaceutical
activities, hundreds of scientific literature are available, signifying the efficient synthesis
of this intermediate using various catalysts. Most of these literature methods suffer from
low yield and harsh reaction conditions that further ignited the researcher to explore for
another green catalyst and fresh methodologies. This review summarizes the last five
years progress in the catalytic synthesis of 1-amidoalkyl-2-naphthols using various heterogenous,
homogenous and nanocatalysts along with their mechanism of action. Various
advantages like green synthesis, atom economy, clean reaction profile and catalyst recovery
are discussed which facilitate the scientist to probe and stimulate the study on this scaffold. In the end, the
catalysts and reactions condition are organized into the tables for swift at a glance understanding of different
catalysts used with their yield and time taken for the synthesis.
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Affiliation(s)
- Rajesh K. Singh
- Department of Pharmaceutical Chemistry, Shivalik College of Pharmacy, Nangal, District Rupnagar, 140126, Punjab, India
| | - Ashima Dhiman
- Department of Pharmaceutical Chemistry, Shivalik College of Pharmacy, Nangal, District Rupnagar, 140126, Punjab, India
| | - Shallu Chaudhary
- Department of Pharmaceutical Chemistry, Shivalik College of Pharmacy, Nangal, District Rupnagar, 140126, Punjab, India
| | - Deo Nandan Prasad
- Department of Pharmaceutical Chemistry, Shivalik College of Pharmacy, Nangal, District Rupnagar, 140126, Punjab, India
| | - Sahil Kumar
- Department of Pharmacy, School of Medical and Allied Sciences, GD Goenka University, Sohna, District Gurugram-122103, Haryana, Faridabad, India
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8
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Qi Y, Qu R, Liu J, Chen J, Al-Basher G, Alsultan N, Wang Z, Huo Z. Oxidation of flumequine in aqueous solution by UV-activated peroxymonosulfate: Kinetics, water matrix effects, degradation products and reaction pathways. CHEMOSPHERE 2019; 237:124484. [PMID: 31394442 DOI: 10.1016/j.chemosphere.2019.124484] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 07/11/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
The degradation of flumequine (FLU) in aqueous solution by ultraviolet (UV)-activated peroxymonosulfate (PMS) was investigated in this work. Under the conditions of [PMS]0:[FLU]0 = 1:1, T = 25 ± 2 °C, pH = 7.0 ± 0.1, nearly complete removal of FLU was achieved after 60 min. The effects of various operating parameters, including oxidant doses, pH, the presence of typical ions (NH4+、Mg2+、Fe3+、Cl-、NO3-、HCO3-) and humic acid were evaluated. It was found that the pseudo-first-order rate constants of FLU degradation increased with increasing PMS dosage and decreasing solution pH. The presence of Mg2+ could accelerate FLU removal, while Fe3+, HCO3-, NO3- and HA inhibited the reaction. Moreover, the degradation of FLU in different water matrices were also explored, and the removal followed the order of Tap water > Ultrapure water > River water > Secondary clarifier effluent. According to the control and radical quenching experiment results, direct photolysis and reactive radicals (SO4- and HO) contributed mainly to FLU degradation in the UV/PMS system. Initial FLU molecule underwent reactions such as hydroxylation, hydroxyl substitution, demethylation, decarboxylation/decarbonylation and ring opening, leading to the formation of nineteen oxidation products. The effective degradation by UV/PMS suggests a feasible technology for treating FLU in waters and wastewaters.
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Affiliation(s)
- Yumeng Qi
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jiaoqin Liu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jing Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Gadah Al-Basher
- King Saud University, College of Science, Zoology Department, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Nouf Alsultan
- King Saud University, College of Science, Zoology Department, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China.
| | - Zongli Huo
- Jiangsu Provincial Center for Disease Control and Prevention, No.172 Jiangsu Road, Jiangsu, Nanjing, 210009, PR China.
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9
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Zhang L, Wei F, Zhao Q, Chen X, Yao Y. Electrochemical degradation of bromophenol blue on porous PbO2–ZrO2 composite electrodes. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04040-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Li H, Han Z, Qian Y, Kong X, Wang P. In Situ Persulfate Oxidation of 1,2,3-Trichloropropane in Groundwater of North China Plain. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16152752. [PMID: 31374962 PMCID: PMC6696075 DOI: 10.3390/ijerph16152752] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/25/2019] [Accepted: 07/30/2019] [Indexed: 11/24/2022]
Abstract
In situ injection of Fe(II)-activated persulfate was carried out to oxidize chlorinated hydrocarbons and benzene, toluene, ethylbenzene, and xylene (BTEX) in groundwater in a contaminated site in North China Plain. To confirm the degradation of contaminants, an oxidant mixture of persulfate, ferrous sulfate, and citric acid was mixed with the main contaminants including 1,2,3-trichloropropane (TCP) and benzene before field demonstration. Then the mixed oxidant solution of 6 m3 was injected into an aquifer with two different depths of 8 and 15 m to oxidize a high concentration of TCP, other kinds of chlorinated hydrocarbons, and BTEX. In laboratory tests, the removal efficiency of TCP reached 61.4% in 24 h without other contaminants but the removal rate was decreased by the presence of benzene. Organic matter also reduced the TCP degradation rate and the removal efficiency was only 8.3% in 24 h. In the field test, as the solution was injected, the oxidation reaction occurred immediately, accompanied by a sharp increase of oxidation–reduction potential (ORP) and a decrease in pH. Though the concentration of pollutants increased due to the dissolution of non-aqueous phase liquid (NAPL) at the initial stage, BTEX could still be effectively degraded in subsequent time by persulfate in both aquifers, and their removal efficiency approached 100%. However, chlorinated hydrocarbon was relatively difficult to degrade, especially TCP, which had a relatively higher initial concentration, only had a removal efficiency of 30%–45% at different aquifers and monitoring wells. These finding are important for the development of injection technology for chlorinated hydrocarbon and BTEX contaminated site remediation.
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Affiliation(s)
- Hui Li
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China
| | - Zhantao Han
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China.
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China.
| | - Yong Qian
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China
| | - Xiangke Kong
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China
| | - Ping Wang
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China
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Xiao Y, Lei H, Zhang H, Wang G, Wang Q, Jin W. Structural evolution of calcia during calcium deoxidation in Fe-O-Ca melt. Phys Chem Chem Phys 2019; 21:13847-13855. [PMID: 31211308 DOI: 10.1039/c9cp02212k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The crystallization process of CaO in iron melt begins with nucleation, which determines the structure and size of the CaO inclusions; thus, it is important to investigate the mechanism of inclusion modification by calcium treatment. In this study, a two-step nucleation method was used to investigate the behavior during the early stages of CaO inclusion crystallization. The first principles method was applied to calculate the structures and properties of CaO crystals and CaO clusters. Then, the nucleation mechanism of CaO in the Fe-O-Ca melt has been discussed. The numerical results show that CaO clusters with cubic structures and appropriate variations are the lowest energy structures and are more stable than other isomers. The stability of the cubic (CaO)n clusters increases with the increase in size and gradually approaches that of the CaO crystal. CaO clusters can form spontaneously in the Fe-O-Ca melt, while the transformation reaction of the CaO clusters in the Fe-O-Ca melt deeply depends on the supersaturation ratio of [Ca] and [O]. CaO clusters may remain as suspended CaO inclusions in the iron melt for a long time, and these suspensions of CaO clusters are the source of excess oxygen in the iron melt.
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Affiliation(s)
- Yuanyou Xiao
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China. and School of Metallurgy, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China and Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning, Anshan, Liaoning Province 114051, P. R. China.
| | - Hong Lei
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China. and School of Metallurgy, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China
| | - Hongwei Zhang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China. and School of Metallurgy, Northeastern University, Shenyang, Liaoning Province 110819, P. R. China
| | - Guocheng Wang
- Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning, Anshan, Liaoning Province 114051, P. R. China.
| | - Qi Wang
- Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning, Anshan, Liaoning Province 114051, P. R. China.
| | - Wei Jin
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu Province 214122, P. R. China
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12
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Kang J, Wu W, Liu W, Li J, Dong C. Zero-valent iron (ZVI) Activation of Persulfate (PS) for Degradation of Para-Chloronitrobenzene in Soil. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 103:140-146. [PMID: 30600392 DOI: 10.1007/s00128-018-2511-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/30/2018] [Indexed: 06/09/2023]
Abstract
Para-chloronitrobenzene (p-CNB) in soil has posed significant health risks because of its persistence and high toxicity. The efficacy of catalyzed Zero-Valent Iron (ZVI), activated persulfate, and ZVI-persulfate processes for the degradation of p-CNB in soil was investigated. The p-CNB removal rate significantly increased from 10.8 to 90.1% with increased ZVI dosage from 0.1 mmol g-1 to 1.0 mmol g-1. The p-CNB removal increased with the decrease of initial pH and a removal efficiency of 85.3% was obtained at an initial pH value of 6.8 in combined system. The p-CNB removal rate in the single persulfate system and ZVI system was 36.5% and 60.2%, while the ZVI-persulfate system showed more sufficient p-CNB removal capacity and the removal rate of p-CNB was 88.7%. Scanning electron microscopy (SEM) and Electron paramagnetic resonance (EPR) was adopted in order to explore the degradation mechanism by ZVI-Persulfate system in soil.
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Affiliation(s)
- Jia Kang
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wencheng Wu
- South China Institute of Environmental Science, Ministry of Environmental Protection (MEP), Guangzhou, 510655, China
| | - Wuxing Liu
- Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Jianhua Li
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Changxun Dong
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
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Miralles-Cuevas S, Oller I, Ruíz-Delgado A, Cabrera-Reina A, Cornejo-Ponce L, Malato S. EDDS as complexing agent for enhancing solar advanced oxidation processes in natural water: Effect of iron species and different oxidants. JOURNAL OF HAZARDOUS MATERIALS 2019; 372:129-136. [PMID: 29588104 DOI: 10.1016/j.jhazmat.2018.03.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 03/08/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
The main purpose of this pilot plant study was to compare degradation of five microcontaminants (MCs) (antipyrine, carbamazepine, caffeine, ciprofloxacin and sulfamethoxazole at 100 μg/L) by solar photo-Fenton mediated by EDDS and solar/Fe:EDDS/S2O82-. The effects of the Fe:EDDS ratio (1:1 and 1:2), initial iron species (Fe(II) or Fe(III) at 0.1 mM) and oxidizing agent (S2O82- or H2O2 at 0.25-1.5 mM) were evaluated. The higher the S2O82- concentration, the faster MC degradation was, with S2O82- consumption always below 0.6 mM and similar degradation rates with Fe(II) and Fe(III). Under the best conditions (Fe 0.1 mM, Fe:EDDS 1:1, S2O82- 1 mM) antipyrine, carbamazepine, caffeine, ciprofloxacin and sulfamethoxazole at 100 μg/L where 90% eliminated applying a solar energy of 2 kJ/L (13 min at 30 W/m2 solar radiation <400 nm). Therefore, S2O82- promotes lower consumption of EDDS as Fe:EDDS 1:1 was better than Fe:EDDS 1:2. In photo-Fenton-like processes at circumneutral pH, EDDS with S2O82- is an alternative to H2O2 as an oxidizing agent.
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Affiliation(s)
- S Miralles-Cuevas
- Laboratorio de Investigaciones Medioambientales de Zonas Áridas, LIMZA, Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile; Escuela Universitaria de Ingeniería Mecánica (EUDIM). Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile.
| | - I Oller
- Plataforma Solar de Almería-CIEMAT, Ctra Senés km 4.5, 04200 Tabernas (Almería), Spain; CIESOL, Joint Research Centre of the University of Almería-CIEMAT, 04120 Almería, Spain.
| | - A Ruíz-Delgado
- Plataforma Solar de Almería-CIEMAT, Ctra Senés km 4.5, 04200 Tabernas (Almería), Spain; CIESOL, Joint Research Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
| | - A Cabrera-Reina
- Laboratorio de Investigaciones Medioambientales de Zonas Áridas, LIMZA, Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile; Escuela Universitaria de Ingeniería Mecánica (EUDIM). Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile
| | - L Cornejo-Ponce
- Laboratorio de Investigaciones Medioambientales de Zonas Áridas, LIMZA, Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile; Escuela Universitaria de Ingeniería Mecánica (EUDIM). Universidad de Tarapacá, Av. General Velásquez 1775, Arica, Chile
| | - S Malato
- Plataforma Solar de Almería-CIEMAT, Ctra Senés km 4.5, 04200 Tabernas (Almería), Spain; CIESOL, Joint Research Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
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14
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Xiao Y, Lei H, Yang B, Wang G, Wang Q, Jin W. Nucleation and growth for magnesia inclusion in Fe-O-Mg melt. RSC Adv 2018; 8:38336-38345. [PMID: 35559083 PMCID: PMC9089909 DOI: 10.1039/c8ra07728b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 11/07/2018] [Indexed: 01/01/2023] Open
Abstract
The crystallization process of magnesia in iron melt begins with nucleation, which determines the structure and size of magnesia inclusions. Thus, it is necessary to have a deep insight into the crystallization of magnesia by two-step nucleation mechanisms. In this work, the two-step nucleation method was used to investigate the behavior during the early stages of magnesia inclusions crystallization. A first principles method was applied to calculate the thermodynamic properties of magnesia crystal from various cluster structures for the formation of magnesia inclusions. Based on the numerical results, the nucleation mechanism of magnesia in liquid iron has been discussed. The magnesia clusters appear as the structural units for Mg-deoxidation reaction in the liquid iron, and the residual magnesia clusters are the reason for the supersaturation ratio or the excess oxygen for MgO formation in the liquid iron. Based on the comparison between Mg-deoxidation equilibrium experiments and numerical results, the previous experiments may be in a different thermodynamic state. The equilibrium reaction product should be not only magnesia clusters but also bulk-magnesia in those equilibrium experiments. The crystallization process of magnesia involves two steps.![]()
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Affiliation(s)
- Yuanyou Xiao
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University Shenyang Liaoning Province 110819 P. R. China .,School of Materials and Metallurgy, Northeastern University Shenyang Liaoning Province 110819 P. R. China.,Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning Anshan Liaoning Province 114051 P. R China
| | - Hong Lei
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University Shenyang Liaoning Province 110819 P. R. China .,School of Materials and Metallurgy, Northeastern University Shenyang Liaoning Province 110819 P. R. China
| | - Bin Yang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University Shenyang Liaoning Province 110819 P. R. China .,School of Materials and Metallurgy, Northeastern University Shenyang Liaoning Province 110819 P. R. China
| | - Guocheng Wang
- Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning Anshan Liaoning Province 114051 P. R China
| | - Qi Wang
- Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning Anshan Liaoning Province 114051 P. R China
| | - Wei Jin
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University Wuxi Jiangsu Province 214122 P. R. China
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15
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Yu X, Peng L, Gao X, He L, Chen K. One-step fabrication of carbonaceous solid acid derived from lignosulfonate for the synthesis of biobased furan derivatives. RSC Adv 2018; 8:15762-15772. [PMID: 35539460 PMCID: PMC9080275 DOI: 10.1039/c8ra02056f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 04/21/2018] [Indexed: 11/21/2022] Open
Abstract
An eco-friendly and low-cost lignosulfonate-based acidic carbonaceous catalyst (LS-SO3H) was effectively fabricated using the sulfite pulping by-product of sodium lignosulfonate as a precursor by facile one-step simultaneous carbonization and sulfonation, and employed for the synthesis of promising biofuel furan derivatives from biorenewable feedstocks. The catalyst preparation conditions significantly affected the preparation and properties of LS-SO3H. A relatively high catalyst preparation yield (40.4%) with strong –SO3H density (1.33 mmol g−1) were achieved when the lignosulfonate was treated in concentrated H2SO4 solution at 120 °C for 6 h. The preparation yield of LS-SO3H was nearly twice as much as that of one-step prepared catalyst using alkaline lignin (another technical lignin from pulping) as a precursor. The as-prepared LS-SO3H had similar textural characteristics to the frequently-used two-step prepared carbonaceous catalyst involving pyrolysis carbonization and sulfonation. LS-SO3H was found to show good catalytic activity for the synthesis of 5-ethoxymethylfurfural (EMF) in ethanol medium, affording around 86%, 57% and 47% yields from 5-hydroxymethylfurfural (HMF), fructose and inulin, respectively. Also, a high HMF yield of 83% could be obtained from fructose when DMSO was replaced as reaction medium. The used LS-SO3H was readily recovered by filtration, and remained active in recycle runs. An easy-prepared and bio-supported lignosulfonate-based acidic carbonaceous catalyst was developed for the synthesis of promising furan biofuels from biorenewable feedstocks.![]()
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Affiliation(s)
- Xin Yu
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming 650500
- PR China
| | - Lincai Peng
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming 650500
- PR China
| | - Xueying Gao
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming 650500
- PR China
| | - Liang He
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming 650500
- PR China
| | - Keli Chen
- Faculty of Chemical Engineering
- Kunming University of Science and Technology
- Kunming 650500
- PR China
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Bakherad M, Moosavi F, Doosti R, Keivanloo A, Gholizadeh M. Metal- and catalyst-free, one-pot, three-component synthesis of propargylamines in magnetized water: experimental aspects and molecular dynamics simulation. NEW J CHEM 2018. [DOI: 10.1039/c7nj03471g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multi-component reactions of aldehydes, amines, and alkynes in magnetized water as a green-promoting medium.
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Affiliation(s)
- Mohammad Bakherad
- Faculty of Chemistry
- Shahrood University of Technology
- Shahrood 3619995161
- Iran
| | - Fatemeh Moosavi
- Department of Chemistry
- Faculty of Science
- Ferdowsi University of Mashhad
- Mashhad 91779
- Iran
| | - Rahele Doosti
- Faculty of Chemistry
- Shahrood University of Technology
- Shahrood 3619995161
- Iran
| | - Ali Keivanloo
- Faculty of Chemistry
- Shahrood University of Technology
- Shahrood 3619995161
- Iran
| | - Mostafa Gholizadeh
- Department of Chemistry
- Faculty of Science
- Ferdowsi University of Mashhad
- Mashhad 91779
- Iran
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