Biosorption of anionic textile dyes from aqueous solution by yeast slurry from brewery

This study evaluated the capacity of adsorbent biochar derived from pequi husks to remove glyphosate (commercial formulation) in aqueous medium under three pH conditions (5.5, 7.0 and 8.0). This biochar presented a mean yield of 33.1% ± 2.66% and a high amount of surface particles of small dimensions endowing it with high surface area. The results showed that removal is proportional to pH increase in the range of 5.5 to 8.0. Adsorption assays performed at pH 7 and 8 fitted better to the Langmuir pseudo-first order kinetics model with fast adsorption in the first 15 to 30 minutes. The results for the acidic pH range fit none of the adopted models satisfactorily. The results obtained suggest that HIGHLIGHTS • Adsorption tests with commercial products are more realistic than with pure products • Biochar obtained from pequi husks can be used for adsorption of glyphosate • Low temperature pyrolysis produces biochar for removal of commercial glyphosate Borba, L.L.; et al

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“…The quantity of glyphosate adsorbed on the biochar (qe) was determined using Equation 2 and the percentage removal (R) using Equation 3 [20].…”

Section: Adsorption Capacity and Isothermsmentioning

confidence: 99%

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

Borba

Cuba

Terán

et al. 2019

Braz. arch. biol. technol.

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“…On the order hand, the biosorption capacity decreased from 86.5 to 34.1 mg g -1 when the biomass dosage increased from 1.0 to 3.0 g L -1 . The decrease in the biosorption capacity at higher yeast-MnO2 composite dosages can be attributed to the adsorption sites that remained unsaturated during the adsorption reaction, whereas the number of sites available for adsorption is increased by increasing the biosorbent dosage (Castro et al, 2017).…”

Section: Effect Of Contact Timementioning

confidence: 99%

“…On the other hand, biosorption technology utilizing different types of biomasses is an efficient and economic process to remove pollutants from wastewater. This is attributed to easy availability of some biosorbents, simplicity of design and operation and ability to treat wastewater with high concentration of pollutants (Castro et al, 2017). In the past decade, biosorbents including agroindustrial by-products (Akar et al, 2009), and biomass of algae (Khataee et al, 2013), filamentous fungi (Yang et al, 2011) and yeast (Castro et al, 2017) have been successfully applied to decolorize aqueous solutions and textile wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Baker's yeast (Saccharomyces cerevisiae) is an inexpensive and readily available source of biomass used to remove pollutants from wastewater. It has been used efficiently to remove radionuclides (Kedari et al, 2001), heavy metals (Xia et al, 2015) and textile dyes (Yu et al, 2009;Castro et al, 2017) with minimal or no impact to the environment. Biomass of S.…”

Section: Introductionmentioning

confidence: 99%

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Baker’s yeast-MnO2 composites as biosorbent for Malachite green: An ecofriendly approach for dye removal from aqueous solution

Santos¹,

Cossolin²,

Reis³

et al. 2018

Rev. ambiente água

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In this study, baker’s yeast-MnO2 composites, produced by direct oxidation of yeast with KMnO4 under acidic conditions, were used as biosorbent to remove the triphenylmethane dye Malachite green (MG) from an aqueous solution. Parameters that influence the adsorption process, such as pH, contact time, temperature, initial dye concentration and biosorbent dosage, were evaluated in batch experiments. The optimum removal of MG was found to be 86.7 mg g-1 at pH 10, 1.0 g L-1 of biomass dosage and 45°C. The kinetic data of dye removal was better described by the pseudo-second-order model. The adsorption process followed the Langmuir isotherm model and the maximum biosorption capacity was estimated to be 243.9 mg g-1 (at 25°C). The negative values of ∆G° and the positive value of ∆H° indicated that the MG biosorption onto yeast-MnO2 composites is spontaneous and endothermic. Fourier transform infrared spectroscopy (FTIR) indicated that the nano-MnO2 particles deposited on yeast-MnO2 composites surface facilitated the MG adsorption. It was concluded that baker’s yeast-MnO2 composites have potential for application as adsorbent for removal of MG from aqueous solution.

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“…Various conventional physico-chemical wastewater treatment processes including flocculation, chemical coagulation, precipitation, ozonation, photocatalysis, color irradiation, and adsorption have been applied for textile effluent decolorization. These techniques, however, have limitations such as high cost, the formation of large quantities of sludge containing the dyes and their metabolites and intensive energy requirements (Castro et al, 2017). On the other hand, bioremediation is considered an efficient and economical technique widely studied in recent years to treat several kinds of industrial effluents.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of textile azo dye Reactive Red 239 by the novel strain Shewanella xiamenensis G5-03 isolated from contaminated soil

Cossolin¹,

Reis

Castro

et al. 2019

Rev. ambiente água

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Shewanella xiamenensis G5-03 isolated from contaminated landfill soil efficiently decolorized five textile azo dyes under static conditions. One of them, Reactive Red 239 (RR239), was completely decolorized at a pH range of 7 to 11 (at 35°C) within 3-6 h. The bacterium was also efficiently decolorized RR239 in a wide temperature range of 25-40°C (at pH 8). The kinetics of RR239 decolorization by G5-03 fitted to the Michaelis–Menten Model (Km = 443.3 mg L-1, Vmax = 166.7 mg L-1 h-1). The decolorization of RR239 was monitored by UV-Vis and FTIR spectroscopy, which showed significant changes in peak positions when compared to the dye spectrum. Overall, the ability of S. xiamenensis G5-03 to decolorize textile azo dyes in a wide range of temperatures and pH (neutral-alkaline) indicate that this strain is a potential candidate for treating dye-containing effluent.

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Biosorption of anionic textile dyes from aqueous solution by yeast slurry from brewery

Abstract: ABSTRACT

Cited by 38 publications

References 37 publications

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

Baker’s yeast-MnO2 composites as biosorbent for Malachite green: An ecofriendly approach for dye removal from aqueous solution

Decolorization of textile azo dye Reactive Red 239 by the novel strain Shewanella xiamenensis G5-03 isolated from contaminated soil

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