- Degradation of azo dye Procion Red MX-5B by photocatalytic oxidation
C M So
Department of Biology, The Chinese University of Hong Kong, Shatin, NT
Chemosphere 46:905-12. 2002
..Nevertheless, the persistence of a low level of TOC indicated that mineralization was not complete and dead-end product(s) which was (were) resistant to PCO might have accumulated...
- Photocatalytic degradation of wastewater pollutants: titanium dioxide mediated degradation of methyl orange and beta-naphthol orange
Photosicences and Photonics Division, Regional Research Laboratory (CSIR, Trivandrum--695 019, India
Ann Chim 93:719-28. 2003
..The degradation rates of the dyes have been found to be strongly influenced by all the above parameters. Carbon dioxide yield measurements indicate that only partial mineralization occurs in the initial phase of oxidation...
- Degradation of dyestuff wastewater using visible light in the presence of a novel nano TiO2 catalyst doped with upconversion luminescence agent
Department of Chemistry, Liaoning University, Shenyang 110036, China
J Environ Sci (China) 17:727-30. 2005
..All the results show that the nano rutile TiO2 powder doped with upconversion luminescence agent is a promising photocatalyst using sunlight for treating the industry dye wastewater in great force...
- TiO2-UV photocatalytic oxidation of Reactive Yellow 14: effect of operational parameters
Department of Chemistry, Annamalai University, Annamalai Nagar, India
J Hazard Mater 135:78-86. 2006
..But negative effects are observed in the presence of NaCl or Na(2)CO(3)...
- Photocatalytic decolorization of azo-dye with zinc oxide powder in an external UV light irradiation slurry photoreactor
Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
J Hazard Mater 138:106-15. 2006
- Potassium diazoacetate-induced p53 mutations in vitro in relation to formation of O6-carboxymethyl- and O6-methyl-2'-deoxyguanosine DNA adducts: relevance for gastrointestinal cancer
MRC Toxicology Unit, Hodgkin Building, University of Leicester P O Box 138, Lancaster Road, Leicester LE1 9HN, and Leeds Institute of Molecular Medicine, St Jame s University Hospital, UK
Carcinogenesis 28:356-62. 2007
- Synthesis and characterization of azo compounds and study of the effect of substituents on their liquid crystalline behavior
Uhood J Al-Hamdani
Department of Chemistry, College of Education, Basrah University, Basrah, Iraq
Molecules 15:5620-8. 2010
In this paper we present six select mesomorphic azo compounds distinguished by the presence of diverse substituents on a central benzene nucleus. All the synthesized compounds exhibit enantiotropic mesophases...
- Molecular cloning, characterisation and ligand-bound structure of an azoreductase from Pseudomonas aeruginosa
Chan Ju Wang
Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
J Mol Biol 373:1213-28. 2007
..The structure of the ligand-bound protein also highlights the pi-stacking interactions between FMN and the azo substrate...
- Anaerobic metabolism of 1-amino-2-naphthol-based azo dyes (Sudan dyes) by human intestinal microflora
Division of Microbiology, National Center for Toxicological Research, U S FDA, 3900 NCTR Rd, Jefferson, AR 72079 9502, USA
Appl Environ Microbiol 73:7759-62. 2007
..These data indicate that human intestinal bacteria are able to reduce Sudan dyes to form potentially carcinogenic aromatic amines...
- Chemistry of the diazeniumdiolates. O- versus N-alkylation of the RNH[N(O)NO](-) ion
Joseph E Saavedra
Contribution from the Basic Research Program, SAIC Frederick, National Cancer Institute at Frederick, Frederick, MD 21702, USA
J Am Chem Soc 126:12880-7. 2004
..As one example, an agent with R = isopropyl and R' = beta-D-glucosyl was prepared and shown to generate nitric oxide in the presence of glucosidase at pH 5...
- Computerized image analysis vs semiquantitative scoring in evaluation of kidney allograft fibrosis and prognosis
Department Institute of Pathology, Rikshospitalet University Hospital, Oslo, Norway
Nephrol Dial Transplant 19:2838-45. 2004
..In the present study, we evaluated allograft cortical interstitial fibrosis, and compared semiquantitative assessment with computerized image analysis of Sirius red-stained collagen in prediction of graft prognosis...
- A novel role for human sulfiredoxin in the reversal of glutathionylation
Victoria J Findlay
Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Jonathan Lucas Street, Charleston, SC 29425, USA
Cancer Res 66:6800-6. 2006
..This novel deglutathionylation function of sulfiredoxin suggests it has a central role in redox control with potential implications in cell signaling...
- Expression and characteristics of the gene encoding azoreductase from Rhodobacter sphaeroides AS1.1737
School of Environmental and Biological Science and Technology, Dalian University of Technology, 116023, PR China
FEMS Microbiol Lett 236:129-36. 2004
..The presence of a hydrazo-intermediate was identified, which provided a convincing evidence for the assumption that azo dyes were degraded via an incomplete reduction stage...
- Carcinogenicity of azo colorants: influence of solubility and bioavailability
Institut fur Arbeitsphysiologie an der Universitat Dortmund, Ardeystr 67, D 44139 Dortmund, Germany
Toxicol Lett 151:203-10. 2004
..This is not the case for 3,3'-dichlorobenzidine-based azo pigments...
- Tumor cell responses to a novel glutathione S-transferase-activated nitric oxide-releasing prodrug
Victoria J Findlay
Department of Pharmacology, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
Mol Pharmacol 65:1070-9. 2004
..Selective inhibition studies showed that the activation of JNK and p38 were critical to the cytotoxic effects of PABA/NO. Finally, PABA/NO produced antitumor effects in a human ovarian cancer model grown in SCID mice...
- A new alkali-thermostable azoreductase from Bacillus sp. strain SF
Department of Environmental Biotechnology, Graz University of Technology, A 8010 Graz, Austria
Appl Environ Microbiol 70:837-44. 2004
..Those dyes with NO2 substituents, especially in the ortho position, were degraded fastest, while analogues with a methyl substitution showed the lowest degradation rates...
- JS-K, a novel non-ionic diazeniumdiolate derivative, inhibits Hep 3B hepatoma cell growth and induces c-Jun phosphorylation via multiple MAP kinase pathways
Liver Cancer Center, Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
J Cell Physiol 197:426-34. 2003
..The data support the idea that prolonged MAPK activation by JS-K action is important in mediating its growth-inhibitory actions. JS-K thus represents a promising platform for novel growth inhibitory analog synthesis...
- Biochemical and molecular characterization of an azoreductase from Staphylococcus aureus, a tetrameric NADPH-dependent flavoprotein
Division of Microbiology, National Center for Toxicological Research, US FDA, 3900 NCTR Road, Jefferson, AR 72079 9502, USA
Microbiology 151:1433-41. 2005
..4 microM min(-1) (mg protein)(-1). Azo1 was also able to metabolize Orange II, Amaranth, Ponceau BS and Ponceau S azo dyes. Azo1 represents the first azoreductase to be identified and characterized from human skin microflora...
- Cloning and characterization of the gene coding for the aerobic azoreductase from Pigmentiphaga kullae K24
Institut fur Mikrobiologie der Universitat Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
Appl Microbiol Biotechnol 62:186-90. 2003
..The azoreductase was heterologously expressed in Escherichia coli and shown to convert the sulfonated azo dye Orange I and furthermore Magneson II [4-(4-nitrophenylazo)-1-naphthol]...
- JS-K, a glutathione/glutathione S-transferase-activated nitric oxide donor of the diazeniumdiolate class with potent antineoplastic activity
Paul J Shami
Division of Medical Oncology, Department of Internal Medicine, University of Utah and Salt Lake City Veterans Administration Medical Centers, Salt Lake City, Utah 84148, USA
Mol Cancer Ther 2:409-17. 2003
..Similar results were seen with s.c. human prostate cancer (PPC-1) xenografts. Our data indicate that JS-K is a promising lead compound for the possible development of a novel class of antineoplastic agents...
- Chemistry of the diazeniumdiolates: Z right harpoon over left harpoon E isomerism
Advanced Biomedical Computing Center, SAIC Frederick, National Cancer Institute at Frederick, Frederick, Maryland 21702, USA
J Am Chem Soc 127:5388-95. 2005
- Respiration and growth of Shewanella decolorationis S12 with an Azo compound as the sole electron acceptor
Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China
Appl Environ Microbiol 73:64-72. 2007
..These findings not only expand the number of potential electron acceptors known for microbial energy conservation but also elucidate the mechanisms of microbial anaerobic azoreduction...
- Effects of electron donors and acceptors on anaerobic reduction of azo dyes by Shewanella decolorationis S12
South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
Appl Microbiol Biotechnol 74:230-8. 2007
..These findings impact on the understanding of the mechanism of bacterial anaerobic azoreduction and have implication for improving treatment methods of wastewater contaminated by azo dyes...
- Antitumor activity of JS-K [O2-(2,4-dinitrophenyl) 1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate] and related O2-aryl diazeniumdiolates in vitro and in vivo
Paul J Shami
Department of Internal Medicine, Division of Medical Oncology, University of Utah, Salt Lake City, 84112, USA
J Med Chem 49:4356-66. 2006
..In addition to the above-mentioned in vivo activities, JS-K is shown here to be carcinostatic in a rat liver cancer model...
- JS-K, a GST-activated nitric oxide generator, induces DNA double-strand breaks, activates DNA damage response pathways, and induces apoptosis in vitro and in vivo in human multiple myeloma cells
Jerome Lipper Multiple Myeloma Center, Department of Medical Oncology, Dana Farber Cancer Institute and Harvard Medical School, Boston, MA 02115, USA
Blood 110:709-18. 2007
..Taken together, these data provide the preclinical rationale for the clinical evaluation of JS-K to improve patient outcome in MM...
- Reactive azo dye reduction by Shewanella strain J18 143
Carolyn I Pearce
Williamson Research Centre for Molecular Environmental Science and School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Manchester M13 9PL, UK
Biotechnol Bioeng 95:692-703. 2006
- Recent advances in azo dye degrading enzyme research
Division of Microbiology, National Center for Toxicological Research, U S FDA, 3900 NCTR Rd, Jefferson, AR 72079 9502, USA
Curr Protein Pept Sci 7:101-11. 2006
..In this review, structures and carcinogenicity of azo colorants, protein structure, enzymatic function, and substrate specificity, as well as application of the azo dyes and azoreductases will be discussed...
- Novel compound 2-methyl-2H-pyrazole-3-carboxylic acid (2-methyl-4-o-tolylazo-phenyl)-amide (CH-223191) prevents 2,3,7,8-TCDD-induced toxicity by antagonizing the aryl hydrocarbon receptor
School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, South Korea
Mol Pharmacol 69:1871-8. 2006
..Taken together, these results demonstrate that this novel compound, CH-223191, may be a useful agent for the study of AhR-mediated signal transduction and the prevention of TCDD-associated pathology...
- Mechanism of pH-dependent decomposition of monoalkylamine diazeniumdiolates to form HNO and NO, deduced from the model compound methylamine diazeniumdiolate, density functional theory, and CBS-QB3 calculations
Andrew S Dutton
Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
Inorg Chem 45:2448-56. 2006
..The production of NO at lower pH is predicted to result from fragmentation of the amide/NO adduct upon protonation of the amine nitrogen...
- PABA/NO as an anticancer lead: analogue synthesis, structure revision, solution chemistry, reactivity toward glutathione, and in vitro activity
Joseph E Saavedra
Basic Research Program, SAIC Frederick, Chemistry Section, Laboratory of Comparative Carcinogenesis, and Biomolecular Structure Section, Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, Frederick, MD 21702, USA
J Med Chem 49:1157-64. 2006
..Consistent with PABA/NO's potent suppression of A2780 human ovarian cancer xenograft growth in mice, it was the most potent of the four in the OVCAR-3 cell line...
- JS-K, a nitric oxide prodrug, induces cytochrome c release and caspase activation in HL-60 myeloid leukemia cells
Medical Oncology, University of Utah, Salt Lake City, UT, USA
Leuk Res 30:1279-83. 2006
..Treatment with JS-K resulted in activation of Caspase (Casp) 9, Casp 3 and Casp 8. JS-K constitutes a promising lead for a new class of anti-leukemic agents...
- Activation of CCAAT/enhancer-binding protein (C/EBP) alpha expression by C/EBP beta during adipogenesis requires a peroxisome proliferator-activated receptor-gamma-associated repression of HDAC1 at the C/ebp alpha gene promoter
Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118, USA
J Biol Chem 281:7960-7. 2006
- Fe(III)-enhanced Azo Reduction by Shewanella decolorationis S12
Guangdong Institute of Microbiology, 100 Central Xianlie Road, Guangzhou 510070, People s Republic of China
Appl Microbiol Biotechnol 74:1342-9. 2007
..The respiratory electron transport chain inhibitors metyrapone, dicumarol, and stigmatellin showed significantly different effects on Fe(III) reduction than on azo dye decolorization...
- Comparison of the NO and HNO donating properties of diazeniumdiolates: primary amine adducts release HNO in Vivo
Katrina M Miranda
Department of Chemistry, University of Arizona, Tucson, Arizona 85721, USA
J Med Chem 48:8220-8. 2005
..These data suggest that primary amine NONOates may be useful as HNO donors in complement to the existing series of secondary amine NONOates, which are well-characterized NO donors...
- A glutathione S-transferase pi-activated prodrug causes kinase activation concurrent with S-glutathionylation of proteins
Danyelle M Townsend
Department of Pharmaceutical Science, Medical University of South Carolina, Charleston, 29425, USA
Mol Pharmacol 69:501-8. 2006
..These effects were consistent with the presence of intracellular PABA/NO or metabolites, because cells overexpressing MRP1 were less sensitive to the drug and had reduced levels of S-glutathionylated proteins...
- Molecular cloning and characterization of the gene coding for the aerobic azoreductase from Xenophilus azovorans KF46F
Institut fur Mikrobiologie der Universitat Stuttgart, 70569 Stuttgart, Germany
Appl Environ Microbiol 68:3948-55. 2002
..The turnover of several industrially relevant azo dyes by cell extracts from the recombinant E. coli strain was demonstrated...
- Azo dye decolourisation by anaerobic granular sludge
F P van der Zee
Department of Agrotechnology and Food Sciences, Wageningen University, The Netherlands
Chemosphere 44:1169-76. 2001
..Reducing agents (e.g., sulphide) in sludge play an important role. The presence of anaerobic biomass is probably beneficial for maintaining the pools of these reduced compounds...
- Reduction of azo dyes by redox mediators originating in the naphthalenesulfonic acid degradation pathway of Sphingomonas sp. strain BN6
Institut für Industrielle Genetik, Universitat Stuttgart, Germany
Appl Environ Microbiol 63:3684-90. 1997
..Thus, the decomposition products of 1,2-dihydroxynaphthalene are suggested to act as redox mediators which are able to anaerobically shuttle reduction equivalents from the cells to the extracellular azo dye...
- Purification and characterization of Clostridium perfringens 120-kilodalton collagenase and nucleotide sequence of the corresponding gene
Department of Microbiology, Kagawa Medical School, Japan
J Bacteriol 176:149-56. 1994
..Vibrio alginolyticus collagenase and Achromobacter lyticus protease I showed significant homology with the 120-kDa collagenase of C. perfringens, suggesting that these three enzymes are evolutionarily related...
- Basic and applied aspects in the microbial degradation of azo dyes
Institut fur Mikrobiologie der Universitat Stuttgart, Germany
Appl Microbiol Biotechnol 56:69-80. 2001
..These reductive processes have been described for some aerobic bacteria, which can grow with (rather simple) azo compounds. These specifically adapted microorganisms synthesize true azoreductases, which reductively cleave the azo ..
- Photo-mediated gene activation using caged RNA/DNA in zebrafish embryos
Laboratory for Developmental Gene Regulation, Brain Science Institute, RIKEN (The Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Nat Genet 28:317-25. 2001
- Effects of different quinoid redox mediators on the anaerobic reduction of azo dyes by bacteria
, , Germany
Environ Sci Technol 36:1497-504. 2002
..The addition of AQS or lawsone also increased the ability of unacclimated sewage sludge to reduce azo dyes. Chemically pure lawsone could be replaced by the powdered leaves of the henna plant which contain significant amounts of lawsone...
- Two different electron transfer pathways may involve in azoreduction in Shewanella decolorationis S12
South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
Appl Microbiol Biotechnol 86:743-51. 2010
- Application of redox mediators to accelerate the transformation of reactive azo dyes in anaerobic bioreactors
F P van der Zee
Wageningen University, Agrotechnology and Food Sciences, Sub Department of Environmental Technology, P O Box 8129, 6700 EV, Wageningen, The Netherlands
Biotechnol Bioeng 75:691-701. 2001
- Chemical synthesis of oligodeoxyribonucleotides containing N3- and O4-carboxymethylthymidine and their formation in DNA
Department of Chemistry, University of California, Riverside, CA 92521 0403, USA
Nucleic Acids Res 37:336-45. 2009
- Identification of an uptake hydrogenase for hydrogen-dependent dissimilatory azoreduction by Shewanella decolorationis S12
Yi guo Hong
Key Laboratory of Tropical Marine Environment Dynamics LED, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou, People s Republic of China
Appl Microbiol Biotechnol 80:517-24. 2008
..azo-reducing bacterium of Shewanella genus, can grow by coupling the oxidation of hydrogen to the reduction of azo compounds as the sole electron acceptor, indicating that an uptake hydrogenase is an important component for electron ..
- The cytotoxicity of DNA carboxymethylation and methylation by the model carboxymethylating agent azaserine in human cells
Imperial Cancer Research Fund, Clare Hall Laboratories, South Mimms, Herts EN6 3LD, London, UK
Carcinogenesis 20:1855-62. 1999
- Comparative analysis of membranous proteomics of Shewanella decolorationis S12 grown with azo compound or Fe (III) citrate as sole terminal electron acceptor
Guangdong Institute of Microbiology, Guangzhou, 510070, China
Appl Microbiol Biotechnol 86:1513-23. 2010
..OmpA family protein SO_3545 was detected to be specific to Fe (III) respiration. Furthermore, ArgF, SdhA, and HoxK were expressed markedly in both amaranth- and Fe (III) citrate-grown cultures compared with oxygen-grown cultures...
- Diazeniumdiolate ions as leaving groups in anomeric displacement reactions: a protection-deprotection strategy for ionic diazeniumdiolates
Brett M Showalter
Chemistry Section, Laboratory of Comparative Carcinogenesis, National Cancer Institute at Frederick, Frederick, MD 21702, USA
J Am Chem Soc 127:14188-9. 2005
- An adipogenic cofactor bound by the differentiation domain of PPARgamma
Dana Farber Cancer Institute, 44 Binney Street Boston, MA 02115, USA
EMBO J 18:3676-87. 1999
..These results suggest that interactions between PGC-2, a receptor isoform-selective cofactor and PPARgamma contribute to the adipogenic action of this receptor...
- Sonochemical degradation of Basic Blue 41 dye assisted by nanoTiO2 and H2O2
Colorant Manufacturing and Environmental Science Department, Institute for Colorants, Paints and Coatings, Tehran, Iran
J Hazard Mater 153:942-7. 2008
..9918 under experimental conditions. The results showed that power ultrasound can be regarded as an appropriate tool for degradation of azo dyes to non-toxic end products...
- Kinetic study on photocatalytic degradation of C.I. Acid Yellow 23 by ZnO photocatalyst
M A Behnajady
Department of Applied Chemistry, Islamic Azad University, Tabriz, Islamic Republic of Iran
J Hazard Mater 133:226-32. 2006
..A comparison between experimental and calculated apparent reaction rate constants shows that the results obtained from the L-H modified model are in good agreement with experimental data...
- Degradation of commercial azo dye reactive Black B in photo/ferrioxalate system
Yao Hui Huang
Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan
J Hazard Mater 140:382-8. 2007
..Applying oxalate in such a photo process increases both the RBB removal efficiency and the COD removal from 68% and 21% to 99.8% and 71%, respectively...
- Degradation and mineralization of Direct Blue 71 in a circulating upflow reactor by UV/TiO2 process and employing a new method in kinetic study
Department of Applied Chemistry, University of Bu Ali Sina, Hamedan 65174, Iran
J Hazard Mater 144:506-12. 2007
- Advanced oxidation processes applied to tannery wastewater containing Direct Black 38--elimination and degradation kinetics
Ticiane Pokrywiecki Sauer
Department of Chemical and Food Engineering, Federal University of Santa Catarina, Campus Universitario Trindade, 88040 900 Florianopolis, Santa Catarina, Brazil
J Hazard Mater 135:274-9. 2006
..Artemia salina toxicity testing performed in parallel showed an increase in toxicity after AOP treatment of the tannery wastewater...
- Application of a sequential batch reactor system for textile dyes degradation: comparison between azo and phthalocyanine dyes
Laboratoire des Sciences du Genie Chimique, CNRS ENSIC INPL, BP 20451, F54001 Nancy, France
Water Sci Technol 55:107-14. 2007
..Although a detrimental effect on biomass could be observed, bacteria were able to cope with the inhibitory effect of the dyes...
- Process development for the batch and bulk removal and recovery of a hazardous, water-soluble azo dye (Metanil Yellow) by adsorption over waste materials (Bottom Ash and De-Oiled Soya)
Department of Applied Chemistry, Maulana Azad National Institute of Technology, Bhopal 462007, MP, India
J Hazard Mater 151:821-32. 2008
..Saturation factors for Bottom Ash and De-Oiled Soya columns have been calculated as 99.15 and 99.38%, respectively. Attempts have also been made to regenerate the dye from the exhausted columns using aqueous sodium hydroxide as eluent...
- Photo-Fenton discoloration of the azo dye X-3B over pillared bentonites containing iron
Department of Chemistry, Shaoxing University, Zhejiang, PR China
J Hazard Mater 132:196-201. 2006
..The amount of Fe ions leached from the Al/Fe-B into the solution is much lower than that leached from the Fe-B during the reaction process...
- Pilot scale annular plug flow photoreactor by UV/H2O2 for the decolorization of azo dye wastewater
Hung Yee Shu
Department of Environmental Engineering, Hungkuang University, No 34 Chung Chie Rd, Shalu, Taichung 433, Taiwan, ROC
J Hazard Mater 125:244-51. 2005
..The residence time needed for 99% decolorizing of 100 l of 20 mgl(-1) acid orange 10 wastewater was 26.9 min for the thin gap plug flow reactor and was far shorter than that of batch reactor needed...
- Immobilization of TiO2 nanopowder on glass beads for the photocatalytic decolorization of an azo dye C.I. Direct Red 23
Water and Wastewater Treatment Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
J Environ Sci Health A Tox Hazard Subst Environ Eng 40:1605-17. 2005
..Our results indicated that during the photooxidation process, the decolorization efficiency was more than 80% at irradiation time of 3 h...
- Laboratory studies of electrochemical treatment of industrial azo dye effluent
Sanjay S Vaghela
Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India
Environ Sci Technol 39:2848-55. 2005
..Decolorization was achieved to about 94-99% with azo dye effluents at 0.7-1.0 L/min flow costing around Indian Rupees 0.02-0.04 per liter, and to about 54-75% in other related effluents at 0.3-1.0 L/min flow under single-pass conditions...
- Removal of color and COD from a mixture of four reactive azo dyes using fenton oxidation process
Department of Environmental Engineering, Civil Engineering Faculty, Istanbul Technical University, Maslak, Istanbul, Turkey
J Environ Sci Health A Tox Hazard Subst Environ Eng 38:2241-50. 2003
..A 100 mg L(-1) solution of a mixture of RB and RY at equal amounts was oxidized using 200 mg L(-1) FeSO4 and 300 mg L(-1) H2O2 at 3.0 pH and 50 degrees C...
- Desorption of reactive dyes from modified chitin
Faculty of Environmental Sciences and Fisheries, University of Warmia and Mazury in Olsztyn, Prawochenski St 1, Olsztyn, Poland
Environ Technol 29:681-90. 2008
..In the case of Scarlet R the number of subsequent adsorption/ desorption cycles run reached around 25, whereas in the case of Black DN it accounted for 37...
- Biocalalyst effects of immobilized anthraquinone on the anaerobic reduction of azo dyes by the salt-tolerant bacteria
School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116023, PR China
Water Res 41:426-32. 2007
..The experiments explored a great improvement of the redox mediator application and the new bio-treatment concept...
- Studies on photodegradation of two commercial dyes in aqueous phase using different photocatalysts
S K Kansal
Department of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India
J Hazard Mater 141:581-90. 2007
..5g/l) than MO (1g/l) under similar conditions. The performance of photocatalytic system employing ZnO/solar light was observed to be better than ZnO/UV system...
- Treatment of dye wastewater by using photo-catalytic oxidation with sonication
Department of Materials Science and Chemical Engineering, Shizuoka University, 3 5 1, Johoku, Hamamatsu 432 8561, Japan
Ultrason Sonochem 14:615-20. 2007
..From these results, it is considered that the photocatalysis with sonication is most effective for the decomposition of dye in the three processes in this study...
- Fresnel lens to concentrate solar energy for the photocatalytic decoloration and mineralization of orange II in aqueous solution
J M Monteagudo
Universidad de Castilla La Mancha, Departamento de Ingenieria Quimica, Escuela Técnica Superior de Ingenieros Industriales, Avda Camilo Jose Cela, 1, 13071 Ciudad Real, Spain
Chemosphere 65:1242-8. 2006
..5-5.5 close to the zero point charge of TiO(2) depending on surface charge of catalyst and dye ionization state. Dosage of catalyst higher than 1.1 gl(-1) decreases the degradation efficiency due to a decrease of light penetration...
- Photocatalytic oxidation of Cibacron Yellow LS-R
Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
J Hazard Mater 146:680-5. 2007
..Various commercial photocatalysts are compared with respect to their decolorization efficiency, the COD, as well as the toxicity reduction. The effect of the temperature on the reaction rate is ascertained...
- Photooxidation of azo dye reactive black 5 using a novel supported iron oxide: heterogeneous and homogeneous approach
C L Hsueh
Department of Chemical Engineering, National Cheng Kung University, Tainan City, 701 Taiwan
Water Sci Technol 53:195-201. 2006
..5-6.0, the homogeneous catalysis is of increasing importance below pH 4.0 because of the Fe ions leaching from the catalyst to solution...
- Utilization of ground eggshell waste as an adsorbent for the removal of dyes from aqueous solution
Wen Tien Tsai
Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung, Taiwan
Bioresour Technol 99:1623-9. 2008
..From the results, it is feasible to utilize the ground eggshell waste as an effective adsorbent for removal of anionic dye from aqueous solution...
- Comparison of dye degradation efficiency using ZnO powders with various size scales
State Key Laboratory of Plastic Forming Simulation and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
J Hazard Mater 141:645-52. 2007
..Moreover, the effect of catalyst loading, pH value and the initial dye concentration on the final degradation efficiency were discussed through the photocatalytic experiments using 50nm ZnO nanoparticle as photocatalyst...
- Ozonation of dyes and textile wastewater in a rotating packed bed
Neng Chou Shang
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
J Environ Sci Health A Tox Hazard Subst Environ Eng 41:2299-310. 2006
..The performance evaluation of ozonation in the rotating packed bed indicated that the higher water flow rate, gas ozone concentration and rotational rotating speed would increase the efficiency of mineralization...
- Metabolism of azo dyes by Lactobacillus casei TISTR 1500 and effects of various factors on decolorization
Faculty of Agro Industry, Department of Biotechnology, Chiang Mai University, Chiang Mai 50100, Thailand
Water Res 41:985-92. 2007
..The optimal conditions for the decolorization of methyl orange by the Lactobacillus casei TISTR 1500 are incubation at 35 degrees C and pH 6 with sucrose provided as the energy source...
- Investigation on the sonocatalytic degradation of acid red B in the presence of nanometer TiO2 catalysts and comparison of catalytic activities of anatase and rutile TiO2 powders
Department of Chemistry, Liaoning University, Shenyang 110036, PR China
Ultrason Sonochem 14:545-51. 2007
..Hence, the method of sonocatalytic degradation for organic pollutants in the presence of nanometer anatase TiO(2) powder is expected to be promising as an advisable choice for the treatment of organic wastewaters in future...
- Sonophotocatalytic degradation of congo red and methyl orange in the presence of TiO2 as a catalyst
Néstor Javier Bejarano Pérez
Departamento de Quimica, Facultad de Ciencias, Universidad Nacional de Colombia, Edificio 451, Bogota, Colombia
Ultrason Sonochem 14:589-95. 2007
- Discoloration of a red cationic dye by supported TiO(2) photocatalysis
Ecole Supérieure de Technologie de Safi, Universite Cadi Ayyad, BP 89, Route Dar Si Aissa, Safi, Morocco
J Hazard Mater 148:513-20. 2007
..Under sunlight the COD removal yield for textile wastewater reaches 33% with Catalyst I against 93% with Catalyst II...
- Kinetic modeling on photooxidative degradation of C.I. Acid Orange 7 in a tubular continuous-flow photoreactor
M A Behnajady
Research Laboratory, Department of Applied Chemistry, Islamic Azad University, Tabriz Branch, Tabriz, Iran
Chemosphere 62:1543-8. 2006
..The calculated results obtained from kinetic model were in good agreement with experimental data...
- Influence of varying reacting conditions in the degradation of azo dye using immobilized TiO2 photocatalyst
Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Johore
Water Sci Technol 46:255-62. 2002
..Using the dye concentration of 2.5 x 10(-4) M (H2O2 = 10(-2) M, lambda = 254 nm, pH = 11), gives a degradation of 93.2%. At dye concentration of 10(-3) M, the performance was reduced to 53.1%...
- Photocatalytic degradation of methyl red dye by silica nanoparticles
National Institute of Laser Enhanced Science, Cairo University, Cairo, Egypt
J Hazard Mater 154:245-53. 2008
..The kinetic and mechanism of photocatalytic reaction were studied and accorded well with experimental results...
- Photodestruction of Acid Orange 7 (AO7) in aqueous solutions by UV/H2O2: influence of operational parameters
M A Behnajady
Department of Applied Chemistry, Islamic Azad University, Tabriz Branch, P O Box 1655, Tabriz, IR, Iran
Chemosphere 55:129-34. 2004
..105 min(-1)). A simple kinetic model is proposed which is in agreement with experimental results...
- Electrocatalytic treatment of waste: studies on discoloration of an industrial azo dye effluent
Sanjay S Vaghela
Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India
Ann Chim 93:841-8. 2003
..Experiments have been carried out in a thin electrochemical reactor under single pass conditions using a dimensionally stable catalytic anode (DSA) and a stainless steel cathode...
- Heterogenous solar photocatalysis of two commercial reactive azo dyes
Rita S Dhodapkar
National Environmental Engineering Research Institute, Nehru Marg, Nagpur 20, India
Ann Chim 93:739-44. 2003
..The extent of decolourization and degradation of RB5 is greater in presence of zinc oxide photocatalyst than TiO2 at pH 5- 6. Zinc oxide undergoes <1% photodissolution after 6 hours of solar irradiation at working pH...
- Photocatalytic degradation of Orange G on nitrogen-doped TiO2 catalysts under visible light and sunlight irradiation
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, College of Chemistry and Environmental Science, No 46, Jianshe Road, Xinxiang, Henan Province 453007, PR China
J Hazard Mater 155:312-9. 2008
..Under visible light and sunlight, the optimal solution pH was both 2.0, while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l, respectively...
- Photocatalytic degradation of the Acid Blue 113 textile azo dye in aqueous suspensions of four commercialized TiO(2) samples
Laboratory for the Treatment and Recycling of Used Waters, INRST, Hammam Lif, Tunisia
J Environ Sci Health A Tox Hazard Subst Environ Eng 43:202-9. 2008
- Thermophilic treatment by anaerobic granular sludge as an effective approach to accelerate the electron transfer and improve the reductive decolorization of azo dyes in bioreactors
A B dos Santos
Sub Department of Environmental Technology, Wageningen University, Wageningen, The Netherlands
Water Sci Technol 52:363-9. 2005
..Furthermore, similar decolorizations were found at 55 degrees C between the AQDS-free and AQDS-supplemented reactors, whereas a significant difference (up to 3.6-fold) on dye reduction occurred at 30 degrees C...
- Azo dye reduction by thermophilic anaerobic granular sludge, and the impact of the redox mediator anthraquinone-2,6-disulfonate (AQDS) on the reductive biochemical transformation
A B dos Santos
Sub Department of Environmental Technology, Wageningen University, Bomenweg 2, PO Box 8129, 6700EV Wageningen, The Netherlands
Appl Microbiol Biotechnol 64:62-9. 2004
..These promising results indicate that there may be good prospects for thermophilic anaerobic treatment of other reductive transformations such as reduction of nitroaromatics and dehalogenation...
- Photodegradation of direct yellow-12 using UV/H2O2/Fe2+
Centre for Environment and Explosive Safety (CEES, Defence R and D Organization (DRDO, Metcalfe House, 110054, Delhi, India
J Hazard Mater 102:231-41. 2003
..The results indicate that the treatment of DY12 dye wastewater with UV/Fe(2+)/H(2)O(2) system is efficient...
- Photocatalytic oxidation of methyl-orange in aqueous suspension: comparison of the performance of different polycrystalline titanium dioxide
Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Universita degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy
Ann Chim 93:639-48. 2003
..Three main transient products still maintaining the chromophoric azo group were identified prior to their transformation into other degradation products which are non-absorbing in the visible region...
- Photocatalytic treatment of cibacron brilliant yellow 3G-P (reactive yellow 2 textile dye)
Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada
J Environ Sci Health A Tox Hazard Subst Environ Eng 38:1903-14. 2003
..However, only 0.78% yield of the nitrate was obtained by photocatalysis. The formation of intermediates was not significant compared to the original dye solution in terms of absorbance...
- Novel catalytic photochemical and hydrothermal treatment processes for acid dye wastewater
Department of Environmental Engineering, Istanbul Technical University, Faculty of Civil Engineering, Maslak, Istanbul, Turkey
J Environ Sci Health A Tox Hazard Subst Environ Eng 38:1615-27. 2003
- Cross-linked quaternary chitosan as an adsorbent for the removal of the reactive dye from aqueous solutions
Departamento de Engenharia Quimica, Universidade Federal de Santa Catarina, Florianopolis 88040 900, Santa Catarina, Brazil
J Hazard Mater 155:253-60. 2008
..The results obtained demonstrate that the adsorbent material could be utilized to remove dyes from textile effluents independent of the pH of the aqueous medium...
- Performance of COD removal from acid scarlet BS-containing solution in a novel packed-bed hollow-tube photocatalytic (PHP) reactor
School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, PR China
J Environ Sci Health A Tox Hazard Subst Environ Eng 38:935-47. 2003
- Decolorization of the textile dyes by newly isolated bacterial strains
Kuo Cheng Chen
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
J Biotechnol 101:57-68. 2003
..Decolorization appeared to proceed primarily by biological degradation...
- Efficient photodegradation of Acid Red B by immobilized ferrocene in the presence of UVA and H2O2
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
J Hazard Mater 154:146-52. 2008
..A possible reaction mechanism was proposed on the basis of all the information obtained under various experimental conditions...
- Competition of Reactive red 4, Reactive orange 16 and Basic blue 3 during biosorption of Reactive blue 4 by polysulfone-immobilized Corynebacterium glutamicum
Division of Environmental and Chemical Engineering, Research Institute of Industrial Technology, Chonbuk National University, Chonju, South Korea
J Hazard Mater 153:478-86. 2008
- Highly efficient decomposition of organic dyes by aqueous-fiber phase transfer and in situ catalytic oxidation using fiber-supported cobalt phthalocyanine
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education of China, Zhejiang Sci Tech University, Hangzhou 310018, China
Environ Sci Technol 41:6240-5. 2007
..Co-TDTAPc-F is stable, causes no secondary pollution, and remains efficient in repetitive test cycles with no obvious degradation of catalytic activity...
- Photocatalytic degradation of Chicago Sky Blue 6B and Benzopurpurin 4B using titanium dioxide thin film
Abdul K Mohammed
Department of Chemistry, Winston Salem State University, 601 S Martin Luther King, Jr, Drive, Winston Salem, North Carolina 27110, USA
J Environ Sci (China) 17:869-72. 2005
..There was an increase in the rate of disappearance of the dye color at lower pH. High concentrations of dye solutions required long degradation time...
- Magnetic powder MnO-Fe2O3 composite--a novel material for the removal of azo-dye from water
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
Water Res 39:630-8. 2005
..The adsorbent containing ARB can be regenerated by catalytic combustion of adsorbed ARB at 400 degrees C in air. Laboratory experiments demonstrated that this material is reusable...
- Study on the photocatalysis performance and degradation kinetics of X-3B over modified titanium dioxide
Xin Hua Qi
College of Environmental Science and Engineering of Nankai University, Tianjin 300071, PR China
J Hazard Mater 118:219-25. 2005
- Photocatalytic and combined anaerobic-photocatalytic treatment of textile dyes
Laboratoire des Sciences du Genie Chimique, CNRS, Nancy University, INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
Chemosphere 72:1816-22. 2008
..The results demonstrate that photocatalysis can be used as a pre- or post-treatment method to biological anaerobic treatment of dye-containing textile wastewater...
- Photoelectrocatalytic activity of highly ordered TiO2 nanotube arrays electrode for azo dye degradation
Department of Chemistry, East China Normal University, Shanghai 200062, China
Environ Sci Technol 41:6259-63. 2007
..The PEC and PC activities of HOTDNA electrode were compared. We concluded that the HOTDNA electrode was an effective photoelectrode for achieving an enhanced MeO degradation...