Microbial decolorization of reactive azo dyes under aerobic conditions

Kodam, Kisan M.; Soojhawon, Iswarduth; Lokhande, Pradeep D.; Gawai, Kachru R.

doi:10.1007/s11274-004-5957-z

Cited by 120 publications

(57 citation statements)

References 9 publications

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“…The percentage removal of colour by S.aureus and E.coli was 90.2% and 88.6% respectively at pH 7. Similar studies have been reported for decolourisation of azo dyes by E.coli [23,24]. In general, decolourisation by bacteria occurs at nearly pH 7.…”

Section: Iii2 Effect Of Temperature and Phsupporting

confidence: 86%

Studies on Decolourisation of Acid Blue 113 Using Staphylococcus Aureus and Escherichia Coli Isolated From Tannery Wastewater

Ayaz¹

2015

IJIRSET

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Biodegradation of acid blue 113 has been studied using two strains-Staphylococcus aureus and Escherichia coli. The effect of pH, time, initial dye concentration, the inoculum size, the co-substrate, static and shaking on decolourisation was studied. The optimum condition for decolourisation was found to be at pH 7 for an initial dye concentration of 200 mg/L at 37 ̊C under static condition. The removal of dye by S.aureus and E.coli at optimum condition was 90% and 88% within 30 h and 42 h respectively. Addition of fructose and starch as carbon source increased the removal of colour by S.aureus and E.coli respectively. Similarly addition of ammonium formate and glycine as nitrogen source under static condition increased the colour removal by S.aureus and E. coli. The enzyme activity of azoreductase for S. aureus and E. coli was found to be 7.33 U/ml and 7.24 U/ml respectively. The COD reduction, FTIR and TLC analysis of the sample before and after decolourisation confirmed the biodegradation of dye and the formation of new metabolite. Phytotoxicity studies indicated that the microbial treated effluent is safe for disposal into the environment. .

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Section: Iii2 Effect Of Temperature and Phsupporting

confidence: 86%

Studies on Decolourisation of Acid Blue 113 Using Staphylococcus Aureus and Escherichia Coli Isolated From Tannery Wastewater

Ayaz¹

2015

IJIRSET

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“…This is outstanding to the strong electron withdrawing propensity of the azo groups associated with oxygen commencing the reduced electron carrier [58][59][60][61]. Many microorganisms are capable of decolorizing the azo dyes, including Gram-positive, Gram-negative bacteria [62][63][64] and some fungi [65,66]. This review highlights the various strategies adopted by the halophiles to compensate for their saline surroundings and includes descriptions of recent studies used these kind microorganisms for bioremediation of petroleum hydrocarbon polluted environments [67].…”

Section: Bioremediationmentioning

confidence: 99%

An Overview of Saltpan Halophilic Bacterium

Manikandan¹,

Pk²

2017

J Antimicrob Agents

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Hypersaline environments provide an excellent medium for natural microbial communities which serve as a potential source of pharmaceutical substances. Salt is widely present in the earth. Almost 73% of earth was covered with marine water which contains 2.5% of common salt. Protease enzyme activity widespread in microorganisms, plant and animals. Proteolytic enzymes used in the industrial application and bioremediation process. In recent years' new mutant's microbe resistant to commonly used antibiotics. Protease inhibitors used as potential antibiotics for controlling microbial infections. A Hypersaline environment such as salt pans and salt lakes has high salt concentration and pH. The saltpan provides a diversity of different environmental conditions of alkalinity, salinity, temperature, pH and nutrition. Halophilic organisms growing between 0.5 and 3.0 M salt concentration. Extreme environments are the best source of bioactive compound producing halophiles microbes.

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“…At the moment, several biological, physical and chemical processes are used to treat dye effluents [2][3][4][5][6]. However, conventional sewage plant treatments are usually ineffective for dye removal because of their high biochemical stability, their relatively high molecular weight and the presence of aromatic rings.…”

Section: Introductionmentioning

confidence: 99%

The degradation of reactive red dye from wastewaters by advanced electrochemical oxidation

Mo¹,

oc²,

Manea³

et al. 2012

Water Pollution XI

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In the present study, electrochemical degradation experiments were conducted to degrade a textile dye namely Reactive Red 147 (RR) from water. The process performance was assessed in terms of the electrochemical decolourisation and mineralization of aqueous RR solutions. Electrolyses were carried out under galvanostatic conditions using boron-doped diamond (BDD) electrodes in 0.1 M Na 2 SO 4 supporting electrolyte using undivided electrolytic cell. Also, the effect of in-situ electrolytic generation of chlorine/hypochlorite at BDD electrode from a mixture of 0.05 M Na 2 SO 4 and 0.05 M NaCl supporting electrolyte on the electrochemical degradation process of RR has been studied. Prior to electrolysis application, the electrochemical behaviour of RR dye on BDD electrode was characterized in both supporting electrolytes without/with chloride presence by cyclic voltammetry in order to establish the working potential-current conditions. The influence of operating variables on the electrochemical process efficiency was studied as a function of the supporting electrolyte type, current density, and the initial pH. Under all applied conditions, the complete decolourisation of dye synthetic solution was achieved after several minutes of electrolysis. Acidic medium and the chlorine/hypochlorite generation favored the decolorization and mineralization process of RR. The complete mineralization of dye synthetic solution was not achieved, and the maximum mineralization efficiency of 35% was reached under the working conditions of hypochlorite presence, which informs about the intermediates generation during the application of electrochemical process based on BDD electrodes.

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Microbial decolorization of reactive azo dyes under aerobic conditions

Cited by 120 publications

References 9 publications

Studies on Decolourisation of Acid Blue 113 Using Staphylococcus Aureus and Escherichia Coli Isolated From Tannery Wastewater

Studies on Decolourisation of Acid Blue 113 Using Staphylococcus Aureus and Escherichia Coli Isolated From Tannery Wastewater

An Overview of Saltpan Halophilic Bacterium

The degradation of reactive red dye from wastewaters by advanced electrochemical oxidation

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