Decolorization of Orange I under alkaline and anaerobic conditions by a newly isolated humus-reducing bacterium, Planococcus sp. MC01

Ma, Chen; Zhou, Shungui; Lu, Qin; Yang, Guiqin; Wang, Dingmei; Li, Zhuang; Li, Fangbai; Lei, Famao

doi:10.1016/j.ibiod.2013.02.016

Cited by 16 publications

(2 citation statements)

References 43 publications

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“…Planococcus sp., which share the same characteristic as a halotolerant bacterium as Janibacter sp., had been reported to degrade the sulfonated azo dye, Orange I (Ma et al, 2013). Figure 41 showed the proposed degradation mechanism (Ma et al, 2013). To validate all the decolorization results shown in this research, the control samples of both single cultures and consortium as well as the abiotic one were measured to determine the chance of bacterial cells absorption and/or degradation by light.…”

Section: Effect Of Rb-5 Concentration and Kinetic Studymentioning

confidence: 69%

“…Thus, finding the possible decolorization pathway can be made by understanding the main character of Janibacter sp., which was a halotolerant bacterium (Khessairi et al, 2014). Planococcus sp., which share the same characteristic as a halotolerant bacterium as Janibacter sp., had been reported to degrade the sulfonated azo dye, Orange I (Ma et al, 2013). Figure 41 showed the proposed degradation mechanism (Ma et al, 2013).…”

Section: Effect Of Rb-5 Concentration and Kinetic Studymentioning

confidence: 96%

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Decolorization of Reactive Black 5 using Soil Bacterial Consortium under a Combined Dynamic and Static Condition

Sari

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Decolorization of Reactive Black 5 (RB-5) dye by isolated soil bacterial consortium had been conducted in this research. This study aims to determine the effect of operating conditions and kinetics of RB-5 decolorization by single strains and the consortium. Bacterial strains capable of RB-5 decolorization were isolated and identified as Micrococcus sp., Janibacter sp. and Rhodococcus sp. The RB-5 synthetic wastewater was used in the experiments with five days of incubation time. The studied conditions include combinations of shaking (dynamic) and static period of incubation, bacterial concentration, initial pH, temperature, and initial dye concentration. The results showed that the combined dynamic and static condition was important to RB-5 decolorization by the isolated bacteria. The decolorization with highest efficiency for all cultures was obtained at pH 7 with 2-day shaking period continued with 3-day static period for single strains and 1-day continued with 4-day for the consortium. The highest efficiency was given by Janibacter sp. (94.8% at 100 mg/L), which exhibited a good performance up to pH 11. All the decolorizations of RB-5 by single strains followed the first-order kinetics (4/-5 concentrations of 200 to 1,000 mg/L) but this was not observed with the consortium. Even though the decolorization efficiency of the consortium (88%) was not as high as the standalone Janibacter sp., the shaking period could be reduced from 2 days to 1 day without losing high ability to decolorize at pH 11. This suggests that working with consortium could give a benefit of reducing the aeration period compared to working with single strain, which will be useful for wastewater treatment application.

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Section: Effect Of Rb-5 Concentration and Kinetic Studymentioning

confidence: 69%

Section: Effect Of Rb-5 Concentration and Kinetic Studymentioning

confidence: 96%

Decolorization of Reactive Black 5 using Soil Bacterial Consortium under a Combined Dynamic and Static Condition

Sari

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Isolation and Cr(VI) reduction characteristics of quinone respiration in Mangrovibacter plantisponsor strain CR1

Lian

et al. 2015

Biotech and App Biochem

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A Cr(VI)-reducing Mangrovibacter plantisponsor strain, CR1, was isolated from tannery effluent sludge and had quinone respiration characteristics. Its chromate (CrO4 (2-) ) resistance, quinone respiration characteristics, and Cr(VI) reduction efficiencies were evaluated in detail. Strain CR1 exhibited a high Cr(VI) resistance with a minimal inhibitory concentration (MIC) of 32 mM in LB medium, and its quinone respiration could occur when an electron donor and strain CR1 both existed in the reaction system. Cr(VI) reduction by strain CR1 was significantly enhanced by a factor of 0.4-4.3 with five different quinone compounds: anthraquinone-2,7-disulfonate, anthraquinone-1-sulfonate, anthraquinone-2-sulfonate (AQS), anthraquinone-2,6-disulfonate, and anthraquinone-1,5-disulfonate. AQS was the best electron shuttle among them, and the greatest enhancement to the Cr(VI) bio-reduction was achieved with 0.96 mM AQS. The correlation between the reaction constant k (mg Cr(VI) g(-1) dry cell weight H(-1) ) and thermodynamic temperature T (K) was expressed as an Arrhenius equation lnk=-7662.9/T+27.931(R2=0.9486); the activation energy Ea was 63.71 kJ mol(-1) , and the pre-exponential factor A was 1.35 × 10(12) mg Cr(VI) g(-1) dry cell weight H(-1) . During the Cr(VI) reduction process, the pH tended to become neutral, and the oxidation-reduction potential decreased to -440 mV. The efficient reduction of Cr(VI) mediated by a quinone respiration strain shows potential for the rapid anaerobic removal of Cr(VI).

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Humus-reducing microorganisms and their valuable contribution in environmental processes

Martínez

Álvarez

Celis

et al. 2013

Appl Microbiol Biotechnol

111

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Humus constitutes a very abundant class of organic compounds that are chemically heterogeneous and widely distributed in terrestrial and aquatic environments. Evidence accumulated during the last decades indicating that humic substances play relevant roles on the transport, fate, and redox conversion of organic and inorganic compounds both in chemically and microbially driven reactions. The present review underlines the contribution of humus-reducing microorganisms in relevant environmental processes such as biodegradation of recalcitrant pollutants and mitigation of greenhouse gases emission in anoxic ecosystems, redox conversion of industrial contaminants in anaerobic wastewater treatment systems, and on the microbial production of nanocatalysts and alternative energy sources.

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Decolorization of Orange I under alkaline and anaerobic conditions by a newly isolated humus-reducing bacterium, Planococcus sp. MC01

Cited by 16 publications

References 43 publications

Decolorization of Reactive Black 5 using Soil Bacterial Consortium under a Combined Dynamic and Static Condition

Decolorization of Reactive Black 5 using Soil Bacterial Consortium under a Combined Dynamic and Static Condition

Isolation and Cr(VI) reduction characteristics of quinone respiration in Mangrovibacter plantisponsor strain CR1

Humus-reducing microorganisms and their valuable contribution in environmental processes

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