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102
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Wang Z, Chen X, Ji H, Ma W, Chen C, Zhao J. Photochemical cycling of iron mediated by dicarboxylates: special effect of malonate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:263-268. [PMID: 20000366 DOI: 10.1021/es901956x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Photochemical redox cycling of iron coupled with oxidation of malonate (Mal) ligand has been investigated under conditions that are representative of atmospheric waters. Malonate exhibited significantly different characteristics from oxalate and other dicarboxylates (or monocarboxylates). Both strong chelating ability with Fe(III) and strong molar absorptivities, but much low efficiency of Fe(II) formation (Phi(Fe(II)) = 0.0022 +/- 0.0009, 300-366 nm) were observed for Fe(III)-Mal complexes (FMCs). Fe(III) speciation calculation indicated that Mal is capable of mediating the proportion between two photoactive species of Fe(III)-OH complexes and FMCs by changing the Mal concentration. Spin-trapping electron spin resonance (ESR) experiments proved the formation of both the (.)CH(2)COOH and (.)OH radicals at lower total Mal concentration ([Mal](T)), but only (.)CH(2)COOH at higher concentrations of malonate, providing strong evidence for competition between malonate and OH(-) and subsequent different photoreaction pathways. Once FMCs dominate the Fe(III) speciation, both photoproduction and photocatalyzed oxidation of Fe(II) will be greatly decelerated. There exists an induction period for both formation and decay of Fe(II) until Fe(III)(OH)(2+) species become the prevailing Fe(III) forms over FMCs as Mal ligand is depleted. A quenching mechanism of Mal in the Fe(II) photoproduction is proposed. The present study is meaningful to advance our understanding of iron cycling in acidified carbon-rich atmospheric waters.
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Affiliation(s)
- Zhaohui Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
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103
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Lotito KJ, Peters JC. Efficient luminescence from easily prepared three-coordinate copper(i) arylamidophosphines. Chem Commun (Camb) 2010; 46:3690-2. [DOI: 10.1039/c000818d] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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104
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Bhagawati M, Ghosh S, Reichel A, Froehner K, Surrey T, Piehler J. Organization of Motor Proteins into Functional Micropatterns Fabricated by a Photoinduced Fenton Reaction. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904576] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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105
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Bhagawati M, Ghosh S, Reichel A, Froehner K, Surrey T, Piehler J. Organization of Motor Proteins into Functional Micropatterns Fabricated by a Photoinduced Fenton Reaction. Angew Chem Int Ed Engl 2009; 48:9188-91. [DOI: 10.1002/anie.200904576] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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106
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Soler J, García-Ripoll A, Hayek N, Miró P, Vicente R, Arques A, Amat AM. Effect of inorganic ions on the solar detoxification of water polluted with pesticides. WATER RESEARCH 2009; 43:4441-4450. [PMID: 19664795 DOI: 10.1016/j.watres.2009.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 07/02/2009] [Accepted: 07/03/2009] [Indexed: 05/28/2023]
Abstract
The effect of eleven inorganic ions (Cl(-), NO(3)(-), SO(4)(2-); PO(4)(3-), Na(+); NH(4)(+), Ca(2+), Mg(2+), Zn(2+), Cu(2+) and Al(3+)) on the photo-Fenton elimination of pesticides has been investigated. Phosphate and chloride have been demonstrated to have an inhibitory role; on the other hand, the reaction was accelerated in the presence of Cu(2+), most probably due to a copper-driven Fenton-like process. The solar photo-Fenton treatment of a mixture of four commercial pesticides was studied at pilot plant scale in the presence of chlorides. Samples with coincident dissolved organic carbon (DOC) showed similar chemical composition, which resulted in a comparable biocompatibility, however longer irradiation periods were needed to reach the desired mineralization when Cl(-) was present. It was demonstrated that the chemical process was able to improve significantly the biocompatibility of the effluent, as shown by the inhibition of respiration of activated sludge, BOD/COD ratio and Zahn-Wellens test.
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Affiliation(s)
- J Soler
- Grupo de Procesos de Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera, Universidad Politécnica de Valencia, Campus de Alcoy, Plaza Ferrandiz y Carbonell s/n, Alcoy, Spain
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107
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Wang Z, Ma W, Chen C, Zhao J. Photochemical coupling reactions between Fe(III)/Fe(II), Cr(VI)/Cr(III), and polycarboxylates: inhibitory effect of Cr species. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:7260-7266. [PMID: 18939556 DOI: 10.1021/es801379j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The roles of chromium species on photochemical cycling of iron and mineralization of polycarboxylates are examined in the presence of Cr(VI) or Cr(III) at pH 2.2-4.0. Under UV irradiation, Cr(III) altered the redox equilibrium of iron species, leading to the shift of the photosteady state toward Fe(II). After a longer time of illumination, total organic carbon (TOC) approached a steady state in the presence of Cr(III) or Cr(VI), whereas oxalate was thoroughly mineralized in the absence of Cr species. The TOC of steady state was closely related to the kind of polycarboxylates, Cr species dosages, pH and O2 atmosphere, but hardly affected by more addition of Fe(III). ESI-MS data indicates that several Cr-oxalate complexes formed in the photochemical reactions, which are responsible for protecting oxalate against further oxidation. A mechanism is proposed for the inhibitory effect of Cr species on oxidation of oxalate and Fe(II). The present study may provide a new insight into the dual environmental effects induced by Cr contaminants especially at heavily chromium-contaminated and dissolved organic matter (DOM)-rich sites.
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Affiliation(s)
- Zhaohui Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
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108
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Photodegradation of bisphenol a induced by metal ions in aqueous solution in the presence of ascorbic acid. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11859-008-0121-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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109
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Sun JH, Sun SP, Fan MH, Guo HQ, Lee YF, Sun RX. Oxidative decomposition of p-nitroaniline in water by solar photo-Fenton advanced oxidation process. JOURNAL OF HAZARDOUS MATERIALS 2008; 153:187-93. [PMID: 17889432 DOI: 10.1016/j.jhazmat.2007.08.037] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2007] [Revised: 08/07/2007] [Accepted: 08/13/2007] [Indexed: 05/17/2023]
Abstract
The degradation of p-nitroaniline (PNA) in water by solar photo-Fenton advanced oxidation process was investigated in this study. The effects of different reaction parameters including pH value of solutions, dosages of hydrogen peroxide and ferrous ion, initial PNA concentration and temperature on the degradation of PNA have been studied. The optimum conditions for the degradation of PNA in water were considered to be: the pH value at 3.0, 10 mmol L(-1) H(2)O(2), 0.05 mmol L(-1) Fe(2+), 0.072-0.217 mmol L(-1) PNA and temperature at 20 degrees C. Under the optimum conditions, the degradation efficiencies of PNA were more than 98% within 30 min reaction. The degradation characteristic of PNA showed that the conjugated pi systems of the aromatic ring in PNA molecules were effectively destructed. The experimental results indicated solar photo-Fenton process has more advantages compared with classical Fenton process, such as higher oxidation power, wider working pH range, lower ferrous ion usage, etc. Furthermore, the present study showed the potential use of solar photo-Fenton process for PNA containing wastewater treatment.
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Affiliation(s)
- Jian-Hui Sun
- College of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan, PR China.
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110
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Lam S, Hermawan M, Coleman H, Fisher K, Amal R. The role of copper(II) ions in the photocatalytic oxidation of 1,4-dioxane. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.09.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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111
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Chen Y, Wu F, Lin Y, Deng N, Bazhin N, Glebov E. Photodegradation of glyphosate in the ferrioxalate system. JOURNAL OF HAZARDOUS MATERIALS 2007; 148:360-5. [PMID: 17374441 DOI: 10.1016/j.jhazmat.2007.02.044] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2006] [Revised: 02/13/2007] [Accepted: 02/17/2007] [Indexed: 05/14/2023]
Abstract
The photoinduced degradation of glyphosate (GLP) in the ferrioxalate system was investigated under irradiation with a 250W metal halide lamp (lambda>/=365nm). The efficiency of orthophosphates release, representing the photodegradation efficiency of GLP, increased with decreasing the initial concentrations of GLP and Fe(III)/oxalate ratios. At acidic pH value in the range of 3.5-5.0, higher efficiency of orthophosphates release up to 60.6% was achieved, while the efficiency dropped to 42.1% at pH 6.0. The photochemical process mainly involved the predominant species of iron(III), namely Fe(C(2)O(4))(2)(-) and Fe(C(2)O(4))(3)(3-), which lead to the formation of hydroxyl radicals in the presence of dissolved oxygen under UV-vis irradiation. Also, the complexation of GLP with Fe(III) obviously increased the light absorption of GLP and facilitated its degradation by direct photolysis. The ninhydrin test for primary amines showed that the GLP was attacked by hydroxyl radicals with CN cleavage to yield aminomethylphosphonic acid (AMPA) and CP cleavage to yield sarcosine. The photodegradation may be enhanced by the decomposition of reactive radicals produced through ligand-to-metal charge transfer (LMCT) of ferric-GLP complexes.
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Affiliation(s)
- Yong Chen
- School of Resources and Environmental Science, Wuhan University, Wuhan 430079, PR China
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112
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Miller AJM, Dempsey JL, Peters JC. Long-Lived and Efficient Emission from Mononuclear Amidophosphine Complexes of Copper. Inorg Chem 2007; 46:7244-6. [PMID: 17676733 DOI: 10.1021/ic7009513] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A number of structurally unusual, monomeric amidophosphine complexes of copper exhibit luminescence properties that are unprecedented for monocopper systems in solution at room temperature. The complexes exhibit lifetimes as long as 150 micros in benzene and quantum efficiencies in the range of 0.16<phi<0.70.
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Affiliation(s)
- Alexander J M Miller
- Division of Chemistry and Chemical Engineering, Arnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, USA
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113
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Cieśla P, Mytych P, Kocot P, Stasicka Z. Role of Iron and Chromium Complexes in Environmental Self‐cleaning Processes. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390701290540] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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114
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Evgenidou E, Konstantinou I, Fytianos K, Poulios I. Oxidation of two organophosphorous insecticides by the photo-assisted Fenton reaction. WATER RESEARCH 2007; 41:2015-27. [PMID: 17353026 DOI: 10.1016/j.watres.2007.01.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2006] [Revised: 01/18/2007] [Accepted: 01/23/2007] [Indexed: 05/14/2023]
Abstract
The photocatalytic degradation of two selected insecticides (dimethoate and methyl parathion) has been studied using the photo-assisted Fenton reaction. The degradation kinetics were studied under different conditions such as iron's and oxidant's concentration, temperature and inorganic ions. The degradation rates proved to be strongly influenced by these parameters. The replacement of hydrogen peroxide with peroxydisulfate was also tested in a photo-Fenton-like reaction. This system achieved high degradation rates of the selected compounds. Intermediate products formed during photocatalytic treatment were identified by means of solid-phase extraction (SPE) coupled to gas chromatography-mass spectroscopy techniques (GC-MS). Eight possible by-products were identified for parathion methyl and three for dimethoate formed through mainly oxidation and dealkylation reactions. Mineralization studies showed also that the photo-Fenton and the photo-Fenton-like systems are able to achieve mineralization of the insecticides. However, complete detoxification is achieved only in the presence of the photo-Fenton reagent.
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Affiliation(s)
- E Evgenidou
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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115
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Kocot P, Szaciłowski K, Stasicka Z. Photochemistry of the [FeIII(edta)(H2O)]− and [FeIII(edta)(OH)]2− complexes in presence of environmentally relevant species. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.11.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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116
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117
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Copper-aided photosterilization of microbial cells on TiO2 film under irradiation from a white light fluorescent lamp. Biochem Eng J 2006. [DOI: 10.1016/j.bej.2006.04.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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118
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Katsumata H, Kaneco S, Suzuki T, Ohta K, Yobiko Y. Photo-Fenton degradation of alachlor in the presence of citrate solution. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2005.09.013] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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119
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120
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Katsumata H, Kaneco S, Suzuki T, Ohta K, Yobiko Y. Degradation of polychlorinated dibenzo-p-dioxins in aqueous solution by Fe(II)/H2O2/UV system. CHEMOSPHERE 2006; 63:592-9. [PMID: 16213552 DOI: 10.1016/j.chemosphere.2005.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2005] [Revised: 08/04/2005] [Accepted: 08/12/2005] [Indexed: 05/04/2023]
Abstract
The photodegradation of polychlorinated dibenzo-p-dioxins (PCDDs), which include tetra- to octa-CDDs (TeCDD, PeCDD, HxCDD, HpCDD and OCDD), was carried out in the presence of Fe(II) and H2O2 mixed reagent. The degradation efficiency was strongly influenced by UV irradiation, and the initial concentrations of H2O2 and Fe(II). An initial TeCDD concentration of 10 ng l(-1) was completely degraded within 20 min under the optimum conditions. All PCDDs tested were successfully degraded by Fe(II)/H2O2/UV treatment and complete degradation of TeCDD, PeCDD and HxCDD was achieved within 120 min. PCDD photodegradation rates decreased with the number of chlorine atoms. The degradation process of TeCDD by this system seems to be initiated by an oxidative reaction (OH* radical attack) because less chlorinated DDs as intermediate products were not detected. From the Frontier electron density calculation, the first OH* radical attack positions on TeCDD were found to be four C atoms neighboring two O atoms. The decomposition of TeCDD gave 4,5-dichlorocatechol as an intermediate product. A TeCDD degradation scheme was proposed based on the identified intermediate and the values of Frontier electron density. Based on these results, Fe(II)/H2O2/UV system could be useful technology for the treatment of wastewater containing persistent pollutants such as dioxins and polychlorinated biphenyls.
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Affiliation(s)
- Hideyuki Katsumata
- Sattelite Venture Business Laboratory, Mie University, Tsu, Mie 514-8507, Japan.
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Szaciłowski K, Macyk W, Drzewiecka-Matuszek A, Brindell M, Stochel G. Bioinorganic photochemistry: frontiers and mechanisms. Chem Rev 2005; 105:2647-94. [PMID: 15941225 DOI: 10.1021/cr030707e] [Citation(s) in RCA: 561] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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