Performance of a newly isolated salt-tolerant yeast strain Pichia occidentalis G1 for degrading and detoxifying azo dyes

Song, Li; Shao, Yifan; Ning, Shunzong; Tan, Liang

doi:10.1016/j.biortech.2017.02.065

Cited by 109 publications

(64 citation statements)

References 39 publications

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“…It could be concluded that the dye mixture did not inhibit yeast growth in tested concentrations. The tolerance of T. akiyoshidaynum to several dyes was demonstrated in other culture media [5], but is rare between yeasts with decolorizing capacity such as C. tropicalis TL-F1, Scheffersomyces spartinae TLHS-SF1 and Pichia occidentalis G1 [16,33,34].…”

Section: Effects Of Initial Dye Concentrationmentioning

confidence: 99%

Optimization and mechanisms for biodecoloration of a mixture of dyes by Trichosporon akiyoshidainum HP 2023

Martorell

Soro

Pajot

et al. 2017

Environmental Technology

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Trichosporon akiyoshidainum HP2023 is a basidiomycetous yeast isolated from Las Yungas rainforest (Tucumán, Argentina) and selected based on its outstanding textile-dye-decolorizing ability. In this work, the decolorization process was optimized using Reactive Black 5 as dye model. Lactose and urea were chosen as carbon and nitrogen sources through a one-at-time approach. Afterwards, factorial designs were employed for medium optimization, leading to the formulation of a simpler optimized medium which contains in g L: lactose 10, yeast extract 1, urea 0.5, KHPO 1 and MgSO 1. Temperature and agitation conditions were also optimized. The optimized medium and incubation conditions for dye removal were extrapolated to other dyes individually and a mixture of them. Dye removal process happened through both biosorption and biodegradation mechanisms, depending primarily on the dye structure. A positive relation between initial inoculum and dye removal rate and a negative relation between initial dye concentration and final dye removal percentages were found. Under optimized conditions, T. akiyoshidainum HP2023 was able to completely remove a mixture of dyes up to a concentration of 300 mg L, a concentration much higher than those expected in real effluents.

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Section: Effects Of Initial Dye Concentrationmentioning

confidence: 99%

Optimization and mechanisms for biodecoloration of a mixture of dyes by Trichosporon akiyoshidainum HP 2023

Martorell

Soro

Pajot

et al. 2017

Environmental Technology

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“…These dyes account for 60-70% of all synthetic dyes produced worldwide (Konicki et al 2017;Wang et al 2017a, b) and constitute a potential hazard to aquatic environments and human health. When improperly discarded into aquatic ecosystems, effluents containing these substances can cause serious disturbances, such as a reduction in the water solubility of oxygen and adverse effects due to the toxicity, mutagenicity and carcinogenicity of their molecules and/ or their intermediates (Mittal et al 2013;Chequer et al 2015;Song et al 2017). Considering an important class of environmental pollutants, azo dyes are resistant to many types of treatment, difficult to mineralize and persistent in aquatic environments due to their bio-recalcitrance.…”

Section: Introductionmentioning

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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“…The role of reductase in the dye decolorization cannot be neglected (Song et al 2017), especially when the oxygen supply is not sufficient. Ferric reductaseencoding Unigene558_All and Unigene7872_All were dramatically upregulated in green (log 2 FC1.79 and 1.2 respectively in ordi vs. green) instead of guai.…”

mentioning

confidence: 99%

“…Transcriptome sequencing results suggest that both enzymes: oxidase, e.g., laccase, AAO, tyrosinase, peroxidase, and reductase including ferric reductase could be involved in biodegradation of azo dyes. Azo reductase and NADH-DCIP reductase were involved in reductive cleavage of azo bonds, which was the first step of biodegradation of azo compounds in some microbes (Solis et al 2012;Song et al 2017). Although the gene expression of these two reductases was not found to be upregulated in the transcriptome analysis, their activities, along with those of other six enzymes, were quantified.…”

mentioning

confidence: 99%

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Functional and Transcriptomic Characterization of a Dye-decolorizing Fungus from Taxus Rhizosphere

Hao

Song

Cheng

et al. 2018

Polish Journal of Microbiology

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A b s t r a c tWe isolated three laccase-producing fungus strains from Taxus rhizosphere. Myrotheium verrucaria strain DJTU-sh7 had the highest laccase activity of 216.2 U/ml, which was increased to above 300 U/ml after optimization. DJTU-sh7 had the best decolorizing effect for three classes of reactive dyes. The DJTU-sh7-containing fungal consortium displayed the robust decolorizing ability. Both color removal efficiency and chemical oxygen demand were increased in the consortium mediated biotransformation. Transcriptome changes of M. verru caria elicited by azo dye and phenolic were quantified by the high throughput transcriptome sequencing, and the activities of the selected oxidases and reductases were determined. The possible involvement of oxidases and reductases, especially laccase, aryl alcohol oxidase, and ferric reductase in the biotransformation of dye and phenolic compounds was revealed at both transcriptomic and phenotypic levels. Revealing the transcriptomic mechanisms of fungi in dealing with organic pollutants facilitates the fine-tuned manipulation of strains in developing novel bioremediation and biodegradation strategies. K e y w o r d s: Myrothecium, reactive dye decolorization, laccase, transcriptome sequencing, degradation mechanism

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Performance of a newly isolated salt-tolerant yeast strain Pichia occidentalis G1 for degrading and detoxifying azo dyes

Cited by 109 publications

References 39 publications

Optimization and mechanisms for biodecoloration of a mixture of dyes by Trichosporon akiyoshidainum HP 2023

Optimization and mechanisms for biodecoloration of a mixture of dyes by Trichosporon akiyoshidainum HP 2023

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

Functional and Transcriptomic Characterization of a Dye-decolorizing Fungus from Taxus Rhizosphere

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