Reactor performances and fate of aromatic amines through decolorization of Direct Black 38 dye under anaerobic/aerobic sequentials

Sponza, Deli̇a Teresa; Işık, Mustafa

doi:10.1016/j.procbio.2003.11.030

Cited by 76 publications

(40 citation statements)

References 25 publications

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“…Table 3 lists several reactor studies providing evidence for the formation of aromatic amines under anaerobic condition, the method of detection, and the fate of aromatic amines during aerobic biodegradation. Aromatic amines formed from azo dye reduction have been reported to be resistant to anaerobic biodegradation and partially or completely biodegradable under aerobic conditions (Libra et al 2004;Sponza and Isik 2005;Koupaie et al 2011;Supaka et al 2004;Ali 2010;Shaw et al 2002). The decrease or disappearance of the peaks or shifting towards the lower retention time in the HPLC chromatograms, the decrease or disappearance of aromatic amines as detected by diazotization method, as well as the decrease in UV absorbance; all indicate removal of aromatic amines (Solis et al 2012).…”

Section: Toxicity At Various Stages Of Anaerobic-aerobic Biodegradationmentioning

confidence: 99%

“…Factors influencing anaerobic decolourization Decolourization of dyes under anaerobic condition is initiated by azoreductase-catalysed reduction or by cleavage of azo bonds resulting in formation of aromatic amines by a mixed bacterial community (Sponza and Isik 2005). Extent of anaerobic biological colour removal has been reported to be higher than 80 % and in some cases even 100 % for a variety of azo dyes (Karatas et al 2010;Yasar et al 2012;Da Silva et al 2012).…”

Section: Sequential Anaerobic-aerobic Biological Treatment Of Azo Dyesmentioning

confidence: 99%

See 1 more Smart Citation

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

257

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Dyes are synthetic organic compounds widely used in various industries such as, textile, leather, plastic, food, pharmaceutical, and paints manufacturing industries. Coloured effluents are highly toxic to the aquatic life and mutagenic to humans. Wastewater containing dyes has become an important issue demanding serious attention. Among the synthetic dyes, azo dyes are the largest and most widely used dyes and account for more than half of the annually produced dyes. The biodegradation of azo dyes is difficult due to their complex structure and synthetic nature. Several treatments have been proposed for efficient azo dye removal, most of them presenting some limitations such as generation of waste sludge, high operational costs, poor efficiency, and incomplete mineralization. Biological treatment is a cost-effective and eco-friendly process for dye degradation. Sequential anaerobic-aerobic biological treatment is considered as one of the most cost-effective methods for the complete mineralization of azo dyes. The anaerobic stage yields decolourization through reductive cleavage of the dye's azo linkages, resulting in the formation of generally colourless but potentially hazardous aromatic amines. The aerobic stage involves degradation of the aromatic amines. It is the most logical step for removing the azo dyes from the wastewater. Several factors can influence the microbial activity and consequently the efficacy and effectiveness of the complete biodegradation processes. This paper summarizes the results of biological decolourization of azo dyes using various types of reactors, elaborates biochemical mechanisms involved, and discusses influence of various operational parameters on decolourization based on reports published in the last decade.

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Section: Toxicity At Various Stages Of Anaerobic-aerobic Biodegradationmentioning

confidence: 99%

Section: Sequential Anaerobic-aerobic Biological Treatment Of Azo Dyesmentioning

confidence: 99%

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

257

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“…Previous investigations showed that the dye concentration can affect the rate of biodegradation of dyes and the optimum dye level could also vary from species to species. In general, high color removal efficiencies have been observed at medium dye concentrations (Rajaguru et al, 2000;Kapdan and Oztekin, 2003;Sponza and Isik, 2005;Khalid et al, 2008a, b). Furthermore, some azo dyes contain one or more sulphonicacid groups on aromatic rings, which can act as a deterrent to inhibit the growth of microorganisms (Chen et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, some azo dyes contain one or more sulphonicacid groups on aromatic rings, which can act as a deterrent to inhibit the growth of microorganisms (Chen et al, 2003). Another reason of the toxicity at higher concentration could be the presence of heavy metals (metal-complex dyes) and/or the presence of non-hydrolyzed reactive groups in case of reactive dyes (Sponza and Isik, 2005). The addition of nitrogen and phosphorus in the liquid medium supported the biodegradation reaction.…”

Section: Discussionmentioning

confidence: 99%

Optimization of Factors for Enhanced Phycoremediation of Reactive Blue Azo Dye

Waqas¹,

Arshad²,

Asghar³

et al. 2015

IJAB

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To cite this paper: Waqas, R., M. Arshad, H.N. Asghar and M. Asghar, 2015 AbstractSynthetic dyes are widely used in textile, leather and other dye-stuff industries. A large fraction of the dyes applied during the dyeing processes are released into wastewater. Therefore, the wastewater from dye-related industries is densely colored, with high chemical oxidation and biological oxidation demand. This wastewater must be treated prior to discharge into wastewater streams to prevent pollution of surface and groundwater, and minimizing risks to public health. The present study was undertaken for the first time in Pakistan to optimize the factors for algae possessing high potential to degrade Reactive Blue azo dye in liquid medium. Among eighty eight (88) isolates of alga, two showed high decolorization, which were used to optimize the decolorization of Reactive Blue azo dye. Both the selected algal strains showed an excellent potential to decolorize 100 mg L -1 Reactive Blue in seven days in the liquid broth.The optimum conditions determined for the two selected algal strains for decolorization of Reactive Blue (100 mg L -1 ) were pH 7.0, temperature 30°C, light conditions of 16 h, when inoculum size of 1 mL/10 mL was maintained and dye solution was supplemented with 5 g L -1 N and 5 g L -1 P as cosubstrates.

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“…The pH tolerance of decolourizing bacteria is quite important because reactive azo dye bind to cotton fibers by addition or substitution mechanisms under alkaline condition and high temperatures [23]. Several studies have shown decolourization of dyes at varying optimum pH based on the organisms isolated.…”

Section: Effect Of Ph On the Decolourization Of Mixed Dyesmentioning

confidence: 99%

Removal of Mixed Azo Dyes by a Moderately Alkaliphilic Bacterial Strain Isolated from Textile Effluent Contaminated Site

2016

J Microbiol Microb Technol

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The aim of the present study was to isolate an alkaliphilic bacterial strain from textile effluent contaminated site and to investigate the ability of the bacterial strain to decolorize the mixed dyes, Direct Brown MR and Direct Yellow SG at different concentrations. The enriched moderately alkaliphilic bacterial strain could decolorize mixed azodyes (DB MR and DY SG) at different concentrations (50 to 250 mg/L). The bacterial strain exhibited maximum decolourization ability of mixed dyes at pH 9, at a concentration of 150 mg/L (90%) of DB MR and DY SG which showed the maximum degradation of 90% by the end of 5th day, at an optimum temperature at 28 °C. Supplementing the media with sucrose and yeast extract, as carbon and nitrogen source could enhance the dye decolourization efficiency of the isolated bacterial strain. The isolated mixed dye degrading bacterial strain was identified by 16S rRNA sequencing as Serratia marcescens. Such isolated bacterial strain could be applied to biological systems for the effective removal of these mixed dyes from textile effluent wastewater.

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Reactor performances and fate of aromatic amines through decolorization of Direct Black 38 dye under anaerobic/aerobic sequentials

Cited by 76 publications

References 25 publications

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Optimization of Factors for Enhanced Phycoremediation of Reactive Blue Azo Dye

Removal of Mixed Azo Dyes by a Moderately Alkaliphilic Bacterial Strain Isolated from Textile Effluent Contaminated Site

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