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Peng J, Li J, Shi H, Wang Z, Gao S. Oxidation of disinfectants with Cl-substituted structure by a Fenton-like system Cu(2+)/H2O2 and analysis on their structure-reactivity relationship. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:1898-1904. [PMID: 26408114 DOI: 10.1007/s11356-015-5454-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/16/2015] [Indexed: 06/05/2023]
Abstract
As widely used chemicals intended to protect human being from infection of microorganisms, disinfectants are ubiquitous in the environment. Among them chlorine-substituted phenol is a basic structure in many disinfectant molecules. Removal of these pollutants from wastewater is of great concern. The oxidative degradation of antimicrobial agents such as triclosan, chlorofene, and dichlorofene by a Fenton-like system Cu(2+)/H2O2 was examined. Reaction conditions such as temperature, initial concentrations of H2O2 and Cu(2+), and pH were optimized using triclosan as a representative. The degradation kinetics of the above disinfectants followed pseudo-first-order kinetics under the investigated conditions. Fourteen chlorophenols (CPs) with different chlorine substitution were also studied to evaluate the influence of molecular structure on the degradation process in the Cu(2+)/H2O2 system. Fourteen structure-related parameters were calculated using Gaussian 09 program. A quantitative structure-activity relationship (QSAR) model was established using SPSS software with measured rate constant (k) as dependent variable and calculated molecular descriptors as independent variables. A three-parameter model including energy of HOMO (E homo), molar heat capacity at constant volume (Cv(θ)), and the most positive net charge of hydrogen atoms (qH(+)) was selected for k prediction, with correlation coefficient R(2) = 0.878. Analyses of the model demonstrated that the Cv(θ) was the most significant factor affecting the k of chlorophenols. Variance analysis and standard t-value test were used to validate the model.
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Affiliation(s)
- Jianbiao Peng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Jianhua Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Huanhuan Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China.
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Yao Y, Lu F, Zhu Y, Wei F, Liu X, Lian C, Wang S. Magnetic core-shell CuFe2O4@C3N4 hybrids for visible light photocatalysis of Orange II. JOURNAL OF HAZARDOUS MATERIALS 2015; 297:224-33. [PMID: 25974659 DOI: 10.1016/j.jhazmat.2015.04.046] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/01/2015] [Accepted: 04/16/2015] [Indexed: 05/27/2023]
Abstract
Novel CuFe2O4@C3N4 core-shell photocatalysts were fabricated through a self-assembly method and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, transmission electron microscopy and Uv-vis diffuse reflection spectroscopy. The photocatalytic performances of the CuFe2O4@C3N4 catalysts were evaluated in photo Fenton-like discoloration of Orange II dye using H2O2 as an oxidant under visible-light irradiation (λ>420 nm). It was found the CuFe2O4@C3N4 hybrid (mass ratio of CuFe2O4/g-C3N4 at 2:1) exhibits a superior activity as compared with single component of CuFe2O4 or g-C3N4 and the mixture of g-C3N4 and CuFe2O4, due to the elevation of the separation efficiency of photoinduced electron-hole pairs, resulted from the heterojunction between the interfaces of g-C3N4 and CuFe2O4. The quenching tests of different scavengers displayed that O2(•-), OH and h(+) are responsible for the Orange II decolorization. In addition, the effects of initial concentration of the dye contaminant (0.014-0.140 mM), different anions (Cl(-), SO4(2-), NO3(-), CH3COO(-) and HCO3(-)) and temperature (15-65 °C) in photoreaction were also investigated. The CuFe2O4@C3N4 sample exhibited stable performance without obvious loss of catalytic activity after five successive runs, showing a promising application for the photo-oxidative degradation of environmental contaminants.
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Affiliation(s)
- Yunjin Yao
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China; School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China.
| | - Fang Lu
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
| | - Yanping Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
| | - Fengyu Wei
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
| | - Xueting Liu
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
| | - Chao Lian
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
| | - Shaobin Wang
- Department of Chemical Engineering, Curtin University, G.P.O. Box U1987, Perth, Western Australia 6845, Australia.
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Wang Y, Guo JS. Catalyzed oxidative degradation of methyl orange over Au catalyst prepared by ionic liquid-polymer modified silica. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1757-899x/87/1/012019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lei Y, Chen CS, Tu YJ, Huang YH, Zhang H. Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe3O4: Mechanism, Stability, and Effects of pH and Bicarbonate Ions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:6838-45. [PMID: 25955238 DOI: 10.1021/acs.est.5b00623] [Citation(s) in RCA: 306] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Magnetic CuO-Fe3O4 composite was fabricated by a simple hydrothermal method and characterized as a heterogeneous catalyst for phenol degradation. The effects of pH and bicarbonate ions on catalytic activity were extensively evaluated in view of the practical applications. The results indicated that an increase of solution pH and the presence of bicarbonate ions were beneficial for the removal of phenol in the CuO-Fe3O4 coupled with persulfate (PS) process. Almost 100% mineralization of 0.1 mM phenol can be achieved in 120 min by using 0.3 g/L CuO-Fe3O4 and 5.0 mM PS at pH 11.0 or in the presence of 3.0 mM bicarbonate. The positive effect of bicarbonate ion is probably due to the suppression of copper leaching as well as the formation of Cu(III). The reuse of catalyst at pH0 11.0 and 5.6 showed that the catalyst remains a high level of stability at alkaline condition (e.g., pH0 11.0). On the basis of the characterization of catalyst, the results of metal leaching and EPR studies, it is suggested that phenol is mainly destroyed by the surface-adsorbed radicals and Cu(III) resulting from the reaction between PS and Cu(II) on the catalyst. Taking into account the widespread presence of bicarbonate ions in waste streams, the CuO-Fe3O4/PS system may provide some new insights for contaminant removal from wastewater.
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Affiliation(s)
- Yang Lei
- †Department of Environmental Engineering, Wuhan University, Wuhan 430079, China
- ‡Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Chuh-Shun Chen
- ‡Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Yao-Jen Tu
- §Institute of Urban Study, Shanghai Normal University, No.100 Guilin Rd. Shanghai 200234, China
| | - Yao-Hui Huang
- ‡Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
- ∥Sustainable Environment Research Center, National Cheng Kung University, Tainan 701, Taiwan
| | - Hui Zhang
- †Department of Environmental Engineering, Wuhan University, Wuhan 430079, China
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Jawad A, Li Y, Lu X, Chen Z, Liu W, Yin G. Controlled leaching with prolonged activity for Co-LDH supported catalyst during treatment of organic dyes using bicarbonate activation of hydrogen peroxide. JOURNAL OF HAZARDOUS MATERIALS 2015; 289:165-173. [PMID: 25725338 DOI: 10.1016/j.jhazmat.2015.02.056] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 01/19/2015] [Accepted: 02/18/2015] [Indexed: 06/04/2023]
Abstract
The effluents from industries are commonly non-biodegradable and produce various hazardous intermediate products by chemical reactions that have direct impact on environment. In the present investigation, a series of Co-Mg/AL ternary LDH catalysts with fixed Mg/Al ratio were prepared by co-precipitation method. The effect of Co on the activity of the catalyst was monitored on the degradation of methylene blue (MB) as model compound at batch level using bicarbonate activation of H2O2 (BAP) system. On bench level, the best CoMgAl-4 catalyst can completely decolorize both methylene blue (MB) and methylene orange (MO) in short time, while in fixed bed, the catalyst was found stable for over 300 h with nearly 100% decolorization and excellent chemical oxygen demand (COD) removal. No leaching of Co was detected for the entire fixed experiment which may be accounted for long life stability and good activity of the catalyst. The ternary LDH catalysts were characterized by AES, XRD, FTIR, BET, and SEM for its compositional, phase structure, optical properties, textural, and surface morphology respectively. The XRD analysis confirmed characteristic pattern of hydrotalcite like structures without impurity phases. The formation of superoxide and hydroxyl radical as ROS was proposed with CoMgAl-4 by radical's scavengers.
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Affiliation(s)
- Ali Jawad
- Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Yibing Li
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, PR China
| | - Xiaoyan Lu
- Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Zhuqi Chen
- Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Weidong Liu
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, PR China
| | - Guochuan Yin
- Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
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56
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Wei M, Ruan Y, Luo S, Li X, Xu A, Zhang P. The facile synthesis of a magnetic OMS-2 catalyst for decomposition of organic dyes in aqueous solution with peroxymonosulfate. NEW J CHEM 2015. [DOI: 10.1039/c5nj00798d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A magnetically recyclable nanocomposite, manganese oxide octahedral molecular sieves (OMS-2) coated Fe3O4 nanoparticle, was prepared by a facile solvent-free process, and used for peroxymonosulfate activation and pollutants degradation.
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Affiliation(s)
- Mingyu Wei
- School of Environmental Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
| | - Yang Ruan
- School of Textile Science and Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
| | - Shilu Luo
- School of Environmental Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
| | - Xiaoxia Li
- School of Chemistry and Chemical Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
| | - Aihua Xu
- School of Environmental Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
| | - Ping Zhang
- School of Environmental Engineering
- Wuhan Textile University
- Wuhan 430073
- P. R. China
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57
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Burg A, Shamir D, Shusterman I, Kornweitz H, Meyerstein D. The role of carbonate as a catalyst of Fenton-like reactions in AOP processes: CO3˙− as the active intermediate. Chem Commun (Camb) 2014; 50:13096-9. [DOI: 10.1039/c4cc05852f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction Co(H2O)62+ + H2O2 proceeds via a transient that decomposes into CoII(H2O)(OOH)(OH)2 + CO3˙−. Plausible biological implications are pointed out.
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Affiliation(s)
- Ariela Burg
- Chemical Engineering Department
- SCE – Shamoon College of Engineering
- Beer-Sheva, Israel
| | - Dror Shamir
- Nuclear Research Centre Negev
- Beer-Sheva, Israel
| | - Inna Shusterman
- Chemistry Department
- Ben-Gurion University of the Negev
- Beer-Sheva, Israel
| | - Haya Kornweitz
- Biological Chemistry Department
- Ariel University
- Ariel, Israel
| | - Dan Meyerstein
- Chemistry Department
- Ben-Gurion University of the Negev
- Beer-Sheva, Israel
- Biological Chemistry Department
- Ariel University
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