Synthesis, characterization and electrochemical studies of azo dyes derived from barbituric acid

Harisha, S.; Keshavayya, J.; Swamy, B.E. Kumara; Viswanath, C.C.

doi:10.1016/j.dyepig.2016.09.004

Cited by 55 publications

(21 citation statements)

References 23 publications

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“…At 24, 240 and 336 h of treatment, bands appeared in the regions of 1384, 1354, 624 and 621 cm −1 , indicating the presence of sulfonic groups (Rawat et al 2018;Harisha et al 2017). Sulfonated radicals are found in both dyes, and the enzymatic action on the molecules may have led to the cleavage of the bonds of these groups, releasing them into the reaction medium, which generated an increase in the intensity of the signals of these bands.…”

Section: Binary Solution: Biodegradation Treatments With a Terreusmentioning

confidence: 99%

Decolorization and removal of toxicity of textile azo dyes using fungal biomass pelletized

Almeida

Corso

2018

Int. J. Environ. Sci. Technol.

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Industrialization and other human impacts have placed increasing pressure on aquatic environments, with the generation of large quantities of toxic aqueous effluents containing different substances, such as synthetic dyes and other organic pollutants. It is estimated that between 10 and 15% of all dyes used in textile processes and other industries are discharged into wastewater, causing extensive aquatic pollution. Biological methods have been employed for the removal of color and toxicity from effluents containing azo dyes. Therefore, biosorption tests were performed with the dyes Acid Blue 161 e Procion Red MX-5B in simple and binary solutions, whereas biodegradation treatment was performed with the dyes only in binary solution. For biosorption, the dyes were removed by the fungi Aspergillus niger, Aspergillus terreus and Rhizopus oligosporus. The fungal biomass demonstrated good adsorption capacity to these compounds. The elimination of the toxicity of the solution after biosorption demonstrated the effectiveness of the treatment. Intense molecular changes after biodegradation treatment with the A. terreus fungus were demonstrated by the FTIR analysis. However, toxicity tests with Lactuca sativa seeds and Artemia salina nauplii indicated the presence of highly toxic metabolites in the reaction medium at the end of the treatment. Based on the findings, biosorption is more suitable for this type of treatment, since it was also capable of removing the molecules from the medium, with the advantage of impeding the formation of highly toxic by-products.

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Section: Binary Solution: Biodegradation Treatments With a Terreusmentioning

confidence: 99%

Decolorization and removal of toxicity of textile azo dyes using fungal biomass pelletized

Almeida

Corso

2018

Int. J. Environ. Sci. Technol.

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“…Hal ini disebabkan karena adanya ikatan rangkap (-N=N-) pada senyawa azo. Ikatan ganda (-N=N-) ini harus dipecah agar dapat menguraikan pencemaran lingkungan yang ditimbulkan (Harisha et al, 2017)Hal yang paling dikhawatirkan dalam pewarnaan menggunakan garam diazonium adalah efek mutagenitas dan karsinogenitas (Narissi, 2014).…”

Section: Karakteristik Limbah Pencelupan Warna Benangunclassified

Penurunan Kadar Cod Dan Warna Limbah Industri Tekstil Dengan Metode Elektro-Fenton

Priyadi

2019

Jurnal Envirotek

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Air limbah dari proses pewarnaan pada benang dan kain industri tekstil umumnya mengandung senyawa Azo serta polutan organik yang sulit untuk terurai secara biologis dan membutuhkan waktu yang lama. Penanganan polutan organik ini dapat dilakukan dengan teknologi alternatif advance oxidation processes (AOPs) diantaranya dengan metode Elektro-Fenton. Penelitian ini bertujuan untuk memperoleh kondisi operasi yang optimum pengurangan chemical oxygen demand (COD) dan warna dalam air limbah industri tekstil menggunakan metode Elektro-Fenton. Pengolahan yang dilakukan adalah dengan Metode Elektro-Fenton secara batch dengan variasi waktu 30,60,90,120,180 menit. Menggunakan variasi tegangan listrik sebesar 6volt jarak elektroda 4cm, 7volt jarak elektroda 2cm, 8volt jarak elektroda 6cm, variasi dosis fenton berdasarkan perbandingan rasio molar H2O2:FeSO4 sebesar (10:0,1),(10:0,2),(10:0,3). Selain secara batch, penelitian ini juga dilakukan percobaan Elektro-Fenton secara kontinyu dengan menggunakan tegangan listrik dan jarak elektroda serta waktu kontak terbaik dari proses batch. Berdasarkan penelitian, efisiensi pengolahan COD dan Warna pada limbah industri tekstil yang dihasilkan menggunakan metode Elektro-Fenton masing-masing sebesar 94,1 %, dan 99,2%, pada perbandingan rasio molar H2O2:FeSO4 10:0,1 dengan tegangan lsitrik 7 volt dan jarak elektroda 4 cm dalam waktu kontak 180 menit dan kondisi pH 4.

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“…Infrared spectra's were obtained using ATR in the range of 4000-650 cm -1 Class 1 Laser product FTIR (Thermo Scientific, US) FT-IR spectrophotometer. NMR spectrums were recorded on a Bruker 1 H-NMR 400 MHz/ 13 C-NMR 100 MHz spectrometer in a d 6 -DMSO solvent with a internal standart TMS.…”

Section: Experimental Processmentioning

confidence: 99%

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mentioning

confidence: 99%

HJSE19030000101Synthesis, Structural Characterization AndTheoretical Investigations of New Azo-Azomethine Compounds Bearing Acryloyl MoietySevil

Özkınalı

Çavuş

Sakin

2018

Hittite J. Sci. Eng.

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A zo dyes which are characterized by the presence of the azo chromophore [-N=N-] have attracted much attention not only for their easy preparation and lower cost but also for their wide application in industry as textile dyeing [1][2][3], coloring of plastic and polimers [1,4], colorimetric indicators [5][6], high-technology applications [3,7], cosmetics [8] and photostorage units [4,9]. In addition azo dyes and its derivatives exhibit photoactive properties with potential application as lasers [9] With the advancement in technology, one of the most important scientific problems is how to correlate between chemical and physical properties of the compound [2,15]. The density functional theory (DFT) method is widely used for structural determination of organic compounds, determining the mechanisms of chemical reactions, calculation of the ground state geometries and prediction of spectroscopic data such as UV-Vis, IR and NMR peaks [2,16].In this study we have synthesized new azoazomethine dyes containing acryloyl groups and the compounds were characterized by Uv-Vis, IR and NMR spectroscopy. Also in this research we report the results of DFT calculations to investigate UV-Vis absorption spectrum and FT-IR regions as well as HOMO-LUMO orbital energies, electostatic potential (ESP) maps, chemical hardness and electronegativity of the compounds. Theoretical UV-Vis calculations were carried out in EtOH (polar protic), CH 2 Cl 2 (apolar aprotic) and DMF (polar aprotic) phases in accordance with the phenyl-2-propenoat were synthesized. The acryloyl derivatives of the azo-azomethine dyes were prepared with metallic sodium and acryloyl chloride in 1:1 Molar ratio and characterized using elemental analysis, IR, UV-Vis, 1H-NMR and 13C-NMR spectroscopy. The molecular geometry was also optimized using density functional theory (DFT/B3LYP) method with the 6-311G(2d,2p) and cc-pvtz basis sets in ground state. From the optimized geometry of the compounds, vibrational frequencies, UV-Vis, molecular electrostatic potential distribution and frontier molecular orbitals were performed using same method and basis stets, and the results were compared with the experimental data.

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Synthesis, characterization and electrochemical studies of azo dyes derived from barbituric acid

Cited by 55 publications

References 23 publications

Decolorization and removal of toxicity of textile azo dyes using fungal biomass pelletized

Decolorization and removal of toxicity of textile azo dyes using fungal biomass pelletized

Penurunan Kadar Cod Dan Warna Limbah Industri Tekstil Dengan Metode Elektro-Fenton

HJSE19030000101Synthesis, Structural Characterization AndTheoretical Investigations of New Azo-Azomethine Compounds Bearing Acryloyl MoietySevil

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