scholarly journals Decolourisation and Biodegradation of Textile Di-azo Dye Congo Red by Chryseobacterium geocarposphaerae DD3

2021 ◽  
Vol 13 (19) ◽  
pp. 10850
Author(s):  
Shrabana Sarkar ◽  
Alex Echeverría-Vega ◽  
Aparna Banerjee ◽  
Rajib Bandopadhyay
Keyword(s):  
Congo Red ◽  
Textile Industry ◽  
Azo Dye ◽  
Multivariate Analyses ◽  
Dye Degradation ◽  
Health Indicators ◽  
Contaminated Water ◽  
Before And After ◽  
Bacterial Treatment ◽  
Near Future

In the present study, Chryseobacterium geocarposphaerae DD3 isolated from textile industry dye effluent in West Bengal, India, displayed significant tolerance to sulfonated di-azo dye Congo red (CR), up to 500 ppm. The optimum decolourisation revealed that C. geocarposphaerae DD3 was capable of 96.52% decolourisation of 0.2 g L−1 CR within 12 h of treatment in the presence of 5 g L−1 glucose as supplementary carbon source. Biodegradation analysis of decolourised CR containing water was investigated by FTIR, MS and 1H NMR, which confirmed the absence of azo bond as well as the toxic aromatic amines. Further, phytotoxicity analysis was performed to assess the toxicity of CR before and after bacterial treatment. Growth indexes of Vigna radiata L. seed confirmed that the biodegraded water was non-phytotoxic in comparison to the control CR solution. Multivariate analyses confirmed the same, showing significant differences between measured plant health indicators for CR solutions, whereas no significant differences were found between distilled and treated water. This study is novel as it is the first report of dye degradation by C. geocarposphaerae and may lead to a sustainable way of treating dye-contaminated water in the near future.

Active manganese oxide: a novel adsorbent for treatment of wastewater containing azo dye

2009 ◽  
Vol 60 (12) ◽  
pp. 3017-3024 ◽  
Author(s):  
S. Chakrabarti ◽  
B. K. Dutta ◽  
R. Apak
Keyword(s):  
Manganese Oxide ◽  
Congo Red ◽  
Textile Industry ◽  
Azo Dye ◽  
Sodium Sulphate ◽  
New Variety ◽  
Freundlich Isotherms ◽  
Adsorption Data ◽  
Equilibrium And Kinetics ◽  
Pseudo Second Order

A new variety of active manganese oxide was prepared, characterized, and tested for its potential of adsorbing Congo Red, a dis-azo dye, from aqueous solutions. Both equilibrium and kinetics were investigated over different values of process parameters such as temperature (25–45°C), adsorbent loading (0.4–0.6%), initial dye concentration (50–500 mg/L), presence of salts (sodium sulphate, 500 mg/L) and the oxygen content (MnOx, x = 1.2, 1.33 and 2) of the adsorbent. The equilibrium adsorption data were fitted to Langmuir and Freundlich isotherms. Langmuir adsorption capacity of the sorbent (x = 1.33) for Congo Red was 38.6 mg/g at room temperature which is substantially higher than those for commercial manganese dioxide, red mud, coir pith, activated carbon, and fly ash. The kinetic data were best interpreted using a pseudo-second order model. The results show that the active manganese oxide used in this work removes the dye by reversible adsorption and has the potential for practical use for remediation of textile industry effluents.

scholarly journals Congo Red and Nigrosine Dye Degradation using Dimethyl Dioxirane as an Oxidising Agent

2021 ◽  
Vol 37 (5) ◽  
pp. 1221-1228
Author(s):  
S. Vinotha ◽  
A.Leema Rose
Keyword(s):  
Congo Red ◽  
Room Temperature ◽  
Functional Group ◽  
Dye Degradation ◽  
Visible Spectroscopy ◽  
Before And After ◽  
Ft Ir ◽  
Combined Action ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

The advanced oxidation of Congo red (CR) and Nigrosine (NI) using the combined action of dimethyl dioxirane as an oxidising agent is described in this study. The effects of several parameters, such as the concentration of the oxidising agent, the initial dye concentration, and the pH, have been investigated. At room temperature, the oxidising agent dimethyl dioxirane was employed to test the degradation of CR and NI dyes. On the degradation efficiency of CR and NI, pH’s effects, oxidising agent, and initial dye concentration were examined. The absorbance of CR and NI dyes before and after degradation was measured using UV-visible spectroscopy. The functional group existing in the dyes before and after degradation was determined using FT-IR spectroscopy.

scholarly journals Adsorption Behaviours of Anionic Azo Dye (Congo Red) from Aqueous Solution on Magnetic Expanded Graphite Material (EG@CoFe2O4) Composites

2020 ◽  
Vol 32 (4) ◽  
pp. 865-870
Author(s):  
Lam Van Tan ◽  
Nguyen Thi Hong Tham ◽  
Van Thuan Tran ◽  
Dao Thi To Uyen ◽  
Pham Gia Vu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Congo Red ◽  
Azo Dye ◽  
Expanded Graphite ◽  
Graphite Material ◽  
Experimental Conditions ◽  
Batch Mode ◽  
Before And After ◽  
Red Dye

In this paper, a potentiality of magnetic expanded graphite material (EG@CoFe2O4) for the adsorptive removal of Congo red, an anionic azo dye, from aqueous solution was studied. The experiments were carried out in batch mode in which various experimental conditions including contact time, initial dye concentration, adsorbent dosage and pH were varied and their influences on the adsorption yield were investigated. The surface of the adsorbent before and after the removal of the dye was characterized by using FT-IR analysis. Maximum adsorption of dye was achieved at pH 6. The adsorption capacity of Congo red onto EG@CoFe2O4 was found to be as high as 101.2 (mg/g), which is higher than the adsorption capacity of the CoFe2O4 (45.7 (mg/g)). These results suggested the use of expanded graphite materials as an efficient adsorbent for decontamination of Congo red dye from factory effluents.

scholarly journals Isolation and Characterization ofParacoccussp. GSM2 Capable of Degrading Textile Azo Dye Reactive Violet 5

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mallikarjun C. Bheemaraddi ◽  
Santosh Patil ◽  
Channappa T. Shivannavar ◽  
Subhashchandra M. Gaddad
Keyword(s):  
Azo Dyes ◽  
Textile Industry ◽  
Azo Dye ◽  
Static Condition ◽  
Sole Source ◽  
Textile Mill ◽  
Visible Absorption ◽  
Isolation And Characterization ◽  
Before And After ◽  
Ft Ir

A potential bacterial strain GSM2, capable of degrading an azo dye Reactive Violet 5 as a sole source of carbon, was isolated from textile mill effluent from Solapur, India. The 16S rDNA sequence and phenotypic characteristics indicated an isolated organism asParacoccussp. GSM2. This strain exhibited complete decolorization of Reactive Violet 5 (100 mg/L) within 16 h, while maximally it could decolorize 800 mg/L of dye within 38 h with 73% decolorization under static condition. For color removal, the most suitable pH and temperature were pH 6.0–9.0 and 25–40°C, respectively. The isolate was able to decolorize more than 70% of five structurally different azo dyes within 38 h. The isolate is salt tolerant as it can bring out more than 90% decolorization up to a salt concentration of 2% (w/v). UV-Visible absorption spectra before and after decolorization suggested that decolorization was due to biodegradation and was further confirmed by FT-IR spectroscopy. Overall results indicate the effectiveness of the strain GSM2 explored for the treatment of textile industry effluents containing various azo dyes. To our knowledge, this could be the first report on biodegradation of Reactive Violet 5 byParacoccussp. GSM2.

Axo-dye biodegradation under anoxic conditions

1996 ◽  
Vol 34 (5-6) ◽  
pp. 495-500 ◽  
Author(s):  
U. Zissi ◽  
G. Lyberatos
Keyword(s):  
Bacillus Subtilis ◽  
Azo Dyes ◽  
Textile Industry ◽  
Azo Dye ◽  
Manufacturing Industry ◽  
Dye Degradation ◽  
Synthetic Medium ◽  
Terminal Electron Acceptor ◽  
Anoxic Conditions ◽  
Nitrogen Double Bond

Biological oxidation of azo-dyes is important for wastewater treatment. Azo-dyes are synthetic organic colorants that exhibit great structural variety. A large majority of these dyes are released into the environment. The textile industry and dyestuff manufacturing industry are two major sources of released azodyes. In the present study, we focus on the anoxic degradation of a disperse azo-dye, p-aminoazobenzene (pAAB), a simple azo-dye, by a pure culture of Bacillus subtilis, growing on a synthetic medium. Bacillus subtilis is a bacterium capable of using nitrate and/or nitrite as terminal electron acceptor under anoxic conditions. This bacterium lacks the capability for fermentation. The degradation of p-aminoazobenzene by Bacillus subtilis was examined through batch experiments in order to elucidate the mechanism of dye degradation. The results proved that Bacillus subtilis co-metabolizes p-aminoazobenzene under denitrifying conditions, in the presence of glucose as carbon source, producing aniline and p-phenylenediamine as the nitrogen-nitrogen double bond is broken.

scholarly journals Enhanced Degradation of Dyes present in Textile Effluent by Ultrasound Assisted Electrochemical Reactor

2019 ◽  
Vol 5 (10) ◽  
pp. 2131-2142 ◽  
Author(s):  
Asad Ali ◽  
Naeem Ejaz ◽  
Sadia Nasreen ◽  
Ali Nasir ◽  
Liaqat Ali Qureshi ◽  
...  
Keyword(s):  
Textile Industry ◽  
Dye Degradation ◽  
Textile Wastewater ◽  
Electrochemical Reactor ◽  
Quantitative Composition ◽  
Sem Images ◽  
Dc Power ◽  
Degradation Of Dyes ◽  
Before And After ◽  
Ultrasound Assisted

Textile industry being the backbone of any country plays a very essential part in the development of the country. The treatment of chemical dyes present in textile wastewater and its reuse for irrigational purposes has become a major concern for the researchers. The present study emphasis on proper degradation of commonly used reactive blue (RB) 19 dye present in textile effluents using ultrasound assisted electrochemical reactor technique and presenting the analysis of microparticles present in dyes and its quantitative composition before and after treatment by means of scanning electron microscopy (SEM) images at high magnification. The investigation was carried out using various parameters such as Concentration, pH and reaction rate. The testing setup also includes UV absorbance spectrophotometer, ultrasonic bath, DC power supply, weighing balance, suction apparatus, and thermometer. Our studies show that the Optimum dye degradation (i.e. 82.3 %) was achieved at time 120 minutes with pH of 3.22 for 50 ppm of solution and the maximum degradation (i.e. 85%) was achieved at 40 0C using acid (HCl) and Base (NaOH) in equal amounts after 120 minutes for solution of 30ppm. The work efficiency includes saving time, money and degrading the dyes from wastewater before toxic sludge formation.

scholarly journals Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1227 ◽  
Author(s):  
Natalia Lopez-Barbosa ◽  
Sergio Leonardo Florez ◽  
Juan C. Cruz ◽  
Nancy Ornelas-Soto ◽  
Johann F. Osma
Keyword(s):  
Congo Red ◽  
Continuous Flow ◽  
Textile Industry ◽  
Dye Decolorization ◽  
Pycnoporus Sanguineus ◽  
Water As Solvent ◽  
Before And After ◽  
Activity Loss ◽  
Laccase Immobilization ◽  
Hydrophobic Supports

Removal of azo and diazo dye content from textile industry wastewaters is crucial due to their environmental impact. Here, we report on the use of the fungal laccase from Pycnoporus sanguineus CS43 immobilized on silica nanoparticles and entrapped in textile-based filters for the degradation of Congo Red. Laccase immobilization and synthesis of the nanocomposites were carried out by two different methods, one in the presence of acetone and the second using water as solvent. This led to a change in the hydrophobicity of the obtained biofilters. Successful preparation of the nanocomposites was confirmed via FTIR spectroscopy. Changes in the secondary structure of the enzyme were inspected through the second derivative of the FTIR spectra. Six different types of filter were fabricated and tested in a continuous flow bioreactor in terms of their decolorization capabilities of Congo Red. The results indicate removal efficiencies that approached 40% for enzymes immobilized on the more hydrophobic supports. Backscattered electron (BSE) images of the different filters were obtained before and after the decolorization process. Percentage of decolorization and activity loss were determined as a function of time until a plateau in decolorization activity was reached. Experimental data was used to recreate the decolorization process in COMSOL Multiphysics® (Stockholm, Sweden). These simulations were used to determine the proper combination of parameters to maximize decolorization. Our findings suggest that the treatment of textile-based filters with immobilized laccase in conjunction with hydrophobic nanocomposites provides a suitable avenue to achieve more efficient laccase dye decolorization (39%) than that obtained with similar filters treated only with free laccase (8%). Filters treated with silica-based nanocomposites and immobilized laccases showed an increase in their decolorization capability, probably due to changes in their wetting phenomena.

scholarly journals Decolorization of Malachite green dye by Stenotrophomonas maltophilia a compost bacterium

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Vasudhaudupa Alaya ◽  
Rajesh Kumar Kodi ◽  
Earanna Ninganna ◽  
Balakrishna Gowda ◽  
M. B. Shivanna
Keyword(s):  
Malachite Green ◽  
Stenotrophomonas Maltophilia ◽  
Dye Degradation ◽  
Uv Spectroscopy ◽  
Pcr Amplification ◽  
Rrna Gene ◽  
Malachite Green Dye ◽  
Before And After ◽  
The Media ◽  
Bacterial Treatment

Abstract Background The release of triphenylmethane dyes, like malachite green (MG) and crystal violet (CV), into the environment is a cause of concern due to its toxicity, mutagenicity and carcinogenicity. Result A bacterial strain that is capable of decolorizing both dyes was isolated from the composted neem oil-seed cake. The strain was characterized as Stenotrophomonas maltophilia based on the 16S rRNA gene sequence and designated as isolate TPMD-1. The kinetic study of the dye degradation revealed the efficiency of the above isolate to degrade MG. The effect of substrate concentration, pH, temperature, and agitation on the decolorization of MG by the isolate was also studied. The MG degradation rate was slightly more in neutral pH at 28–30 °C and 150 rpm. The UV-spectroscopy, HPLC, and FTIR analyses of the dye sample before and after bacterial treatment revealed the high ability of S. maltophilia TPDM-1 in the removal of MG from the media. The genetic snapshot of the isolate by PCR amplification and sequencing showed the presence of genes 'lac’ and ‘tmr’ that codes for laccase and triphenylmethane reductase. Conclusion This study presented the first report of Stenotrophomonas maltophilia in the degradation and detoxification of MG dye by oxidoreduction, which could be used for the bioremediation of aquatic environments contaminated by MG.

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