Mineralization of aromatic amines liberated during the degradation of a sulfonated textile colorant using Klebsiella pneumoniae strain AHM

Kumar, Madhava Anil; Poonam, S.; Kumar, Vikas; Baskar, G.; Seenuvasan, Muthulingam; Dhanasekaran, Anuradha; Sivanesan, S.

doi:10.1016/j.procbio.2017.03.012

Cited by 25 publications

(5 citation statements)

References 31 publications

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“…Meanwhile, reductive attack on azo groups (-N = N-) by azoreductase is the beginning of MO decolorization (Pandey et al 2007;Wahyuni et al 2016). The cleavage of the azo bridge produces toxic aromatic amines; however, some microbes can carry out further mineralization such as Klebsiella pneumoniae strain AHM (Kumar et al 2017). Meanwhile, sulfonated aromatic amines require a consortium of cells for complete mineralization (Barsing et al 2011;Wahyuni et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Role of Fe2+-dependent Reaction in Biodecolorization of Methyl Orange by Brown-rot Fungus Fomitopsis pinicola

et al. 2022

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The involvement of Fenton reaction on biodegradation of methyl orange (MO) by brown-rot fungus Fomitopsis pinicola was investigated based on Fe2+-dependent reaction. The degradation of MO (final concentration 75 mg/L) was performed in mineral salt media with and without Fe2+ with incubation period at 0, 7, 14, 21, and 28 days. Degradation analysis was performed using UV-Vis Spectrophotometer and LC-TOF/MS. F. pinicola decolorized MO in a medium containing Fe2+ and a medium that lacked the mineral, at percentages of 89.47% and 80.08%, respectively. The optimum decolorization occurred after 28 days of incubation with the fungus on the presence of Fe2+, indicated that the presence of Fe2+ enhanced MO degradation with assumed to correlate with Fenton reaction. Two metabolites were detected through the LC-TOF/MS analysis, namely 4-(2-(4-(dimethyliminio)-2-hydroxycyclohexa-2,5-dien-1-ylidene) hydrazinyl) phenolate (m/z 258, RT: 1.28 min, compound 1) and 4-(2-(4-(dimethyliminio) cyclohexa-2,5-dien-1-ylidene) hydrazinyl) benzenesulfonate (m/z 391, RT: 2.70 min, compound 2). Compound 1 was a transformation product of hydroxylation and methylation, compound 2 was a product of dehydroxylation and desulfonation. This study indicated that the transformation of the metabolite structures was involved hydroxyl radical (OH.) and enzymatic mechanisms, which involved Fe2+-dependent reaction.

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Section: Discussionmentioning

confidence: 99%

Role of Fe2+-dependent Reaction in Biodecolorization of Methyl Orange by Brown-rot Fungus Fomitopsis pinicola

et al. 2022

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“…The decolourization rates were studied using the supernatant collected from aliquots withdrawn at different time interval, centrifuged for 10 min at 10 000 g (Kumar et al . 2017). The growth rate of G. candidum was observed and a correlation between the growth rate and decolourization was studied.…”

Section: Methodsmentioning

confidence: 99%

De‐colourization of textile effluent using immobilized Geotrichum candidum : an insight into mycoremediation

Rajhans

Sen²,

Barik

et al. 2020

Lett Appl Microbiol

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Textile effluent is generally complicated to manage because of its extremely noxious and recalcitrant coloured compositions. Mycoremediation is an extensively used strategy for the competent degradation of hazardous pollutants present in textile effluent. Fungus could be immobilized in synthetic or natural matrices. The current study shows the decolourization of the textile effluent by 85·5 and 98·5% within 6 h using suspended and immobilized fungus, Geotrichum candidum with optimized parameters like inoculum size (5%), pH (4·5), and temperature (30°C). To maintain a high biomass of fungal population and enhance the retention of fungal strain in the contaminated sites, the fungi need to be immobilized. Hence, the fungus was immobilized naturally onto the selected inert support that is, coconut fibres by the means of adsorption, where they grew as active films on the fibres after being grown in the culture broth. The optimized process parameters of inoculum size, fibre quantity and agitation speed for immobilized G. candidum were 5%, 2·2 g l−1 of effluent and 100 rev min−1 respectively. High level of laccase (22 and 25 U l−1 in suspended and immobilized fungal cells treatment respectively) was observed during the process of decolourization and it was found that decolourization was directly proportional to the laccase activity. The UV–vis, FTIR, 1H NMR and GC‐MS analyses of treated textile industrial wastewater revealed the degradation of toxic pollutants in the textile effluent and formation of lower molecular weight intermediates. The study revealed a higher efficacy of immobilized G. candidum in comparison to suspended fungal culture, employing ligninolytic enzyme laccase, which catalyzes the degradation/transformation of aromatic dyes in the textile effluent thus decolourizing it.

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“…In previous studies, many Klebsiella species were reported to have azo dye-decolourizing abilities. For example, Klebsiella strain Rz7 degraded 89.12 % of Evans Blue dye (Zabłocka-Godlewska et al, 2015) while Klebsiella pneumoniae strain AHM completely decolorized 50 and 250 mg/L Reactive Orange dye 16 within 150 and 600 min under static condition (Kumar et al, 2017). However, there are only a few studies reporting methylene blue dye decolorization by Klebsiella pneumoniae.…”

Section: Dye Degradation Analysismentioning

confidence: 99%

Biodegradation of Methylene Blue by Bacteria Strains Isolated From Contaminated Soil

Ariffin¹,

ANUAR²

2022

MAB

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Methylene blue is one of the textile dyes that are commonly used in the textile coloring industry. The discharge of textile wastewater containing residual textile coloring substances into the environment can lead to environmental pollution. Thus, bioremediation can be a solution to reduce dye pollution by using bacterial strains. In the present study, two bacterial strains with the ability to degrade methylene blue dye were isolated from contaminated soil. Both isolated bacteria were further evaluated for the dye decolorization percentage and the effect of abiotic parameters on bacterial growth. The isolated bacteria were incubated in a mineral salt medium added with methylene blue dye for eight days in static aerobic conditions. The dye degradation was examined by using UV-VIS spectrophotometer at 665 nm. The isolated bacteria were identified as Klebsiella pneumoniae strain UMTFA1 (EK) and Pseudomonas aeruginosa strain UMTFA2 (EP) using 16s rRNA sequencing. The biodegradation study showed that Klebsiella pneumoniae strain UMTFA1 (EK) and Pseudomonas aeruginosa strain UMTFA2 (EP) were capable to degrade 10.52% and 11.65% of methylene blue dye after 8 days of incubation, respectively. The present study may provide a basis for biotreatment and bioremediation of dye-contaminated soils.

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Mineralization of aromatic amines liberated during the degradation of a sulfonated textile colorant using Klebsiella pneumoniae strain AHM

Cited by 25 publications

References 31 publications

Role of Fe2+-dependent Reaction in Biodecolorization of Methyl Orange by Brown-rot Fungus Fomitopsis pinicola

Role of Fe2+-dependent Reaction in Biodecolorization of Methyl Orange by Brown-rot Fungus Fomitopsis pinicola

De‐colourization of textile effluent using immobilized Geotrichum candidum : an insight into mycoremediation

Biodegradation of Methylene Blue by Bacteria Strains Isolated From Contaminated Soil

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