Rhodotorula mucilaginosa Isolated from the Manganese Mine Water in Minas Gerais, Brazil: Potential Employment for Bioremediation of Contaminated Water

Amorim, Soraya Sander; Leão, Versiane Albis; Guerra‐Sá, Renata

doi:10.1007/s11270-020-04896-1

Cited by 8 publications

(3 citation statements)

References 43 publications

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“…There were no apparent differences among cells that were grown without heavy metals or at low concentration, 55 mg/L of Mn(II) or 64 mg/L of Cu(II) as shown in Figure S1 . Similar results were observed in R. mucilaginosa yeast cells treated with 50 mg/L (equivalent to 0.91 mM Mn 2+ ) and those that were not treated [ 33 ]. In contrast, S. cerevisiae cells grown in medium with 1 mM of Cu 2+ (64 mg/L) exhibited defects in size, shape and adhesion compared to control cells [ 41 ].…”

Section: Resultssupporting

confidence: 80%

“…Ruas et al. reported that living R. mucilaginosa yeast can remove 10.6% of an initial 50 mg/L Mn(II) during 7 days of incubation [ 33 ]. Live Mn- resistant S. cerevisiae mutants were also reported to have a maximum Mn(II) uptake more than four-fold that of the parental strain [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

“…The initial concentration of heavy metals commonly used in biosorption experiments were in the range 10-100 mg/L [15,18,[32][33][34]. However, there have been reports of copper/manganese concentrations from 150 mg/L [26,35], even up to 500 mg/L [36] or 1000 mg/L [37].…”

Section: Effect Of Initial Ph and Yeast Biomass Dose On Biosorptionmentioning

confidence: 99%

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Removal of Manganese and Copper from Aqueous Solution by Yeast Papiliotrema huenov

et al. 2021

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Papiliotrema huenov was previously reported to be highly tolerant of a range of extremely toxic heavy metals. This study aimed to identify the potential of P. huenov to remove manganese and copper from aqueous solution. Physical conditions which affect removal of Mn(II) and Cu(II) were determined. Optimal temperature for adsorption of both metal ions was 30 C, and optimal pH for maximum uptake of Mn(II) and Cu(II) were 5 and 6, respectively. Under these conditions, living cells of P. huenov accumulated up to 75.58% of 110 mg/ L Mn(II) and 70.5% of 128 mg/L Cu(II) over 120 h, whereas, the removal efficiency of metal ions by dead cells over 1 h was 60.3% and 56.5%, respectively. These results indicate that living cells are more effective than dead biomass for bioremediation, but that greater time is required. The experimental data extends the potential use of P. huenov in biosorption and bioaccumulation of toxic heavy metals to copper and manganese, two of the most common industrial contaminants.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%