Tolerance of Ulothrix sp. LAFIC 010 (Chlorophyta) against high concentration of metals from acid mine drainage

Massocato, Thaís Fávero; Ramos, Juliano Carvalho; Bascuñan, V.L.F.; Simioni, Carmen; Rörig, Leonardo Rubi; Barufi, José Bonomi

doi:10.1016/j.ecoenv.2018.03.045

Cited by 12 publications

(2 citation statements)

References 35 publications

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“…Also, increased cellular granularity may be due to changes in the ultrastructure as observed in Chlamydomonas reinhardtii when exposed to Cd . At high concentrations of Zn (4.4 mM) in the presence of Mn and Ni at pH 3.5, Ulothrix sp., an acidophilic alga isolated from AMD, exhibited completely disoriented thylakoids in chloroplasts . The secretion of EPS, as determined from FTIR peak area (arbitrary units, au), increased at higher concentrations of iron in both the strains of microalgae (Figure b).…”

Section: Resultssupporting

confidence: 92%

“…29 At high concentrations of Zn (4.4 mM) in the presence of Mn and Ni at pH 3.5, Ulothrix sp., an acidophilic alga isolated from AMD, exhibited completely disoriented thylakoids in chloroplasts. 37 The secretion of EPS, as determined from FTIR peak area (arbitrary units, au), increased at higher concentrations of iron in both the strains of microalgae (Figure 1b). The strain MAS3 exhibited 5−10% increase in EPS accumulation at 50−200 mg L −1 of Fe than MAS1.…”

Section: Microalgalsupporting

confidence: 92%

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Sustainable Iron Recovery and Biodiesel Yield by Acid-Adapted Microalgae, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, Grown in Synthetic Acid Mine Drainage

et al. 2020

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Sustainable resource recovery is the key to manage the overburden of various waste entities of mining practices. The present study demonstrates for the first time a novel approach for iron recovery and biodiesel yield from two acid-adapted microalgae, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, grown in synthetic acid mine drainage (SAMD). Virtually, there was no difference in the growth of the strain MAS3 both in Bold’s basal medium (control) and SAMD. Using the IC50 level (200 mg L–1) and a lower concentration (50 mg L–1) of iron in SAMD, the cell granularity, exopolysaccharide (EPS) secretion, iron recovery, and biodiesel were assessed in both the strains. Both cell granularity and accumulation of EPS were significantly altered under metal stress in SAMD, resulting in an increase in total accumulation of iron. Growth of the microalgal strains in SAMD yielded 12–20% biodiesel, with no traces of heavy metals, from the biomass. The entire amount of iron, accumulated intracellularly, was recovered in the residual biomass. Our results on the ability of the acid-adapted microalgal strains in iron recovery and yield of biodiesel when grown in SAMD indicate that they could be the potential candidates for use in bioremediation of extreme habitats like AMD.

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Section: Resultssupporting

confidence: 92%

Section: Microalgalsupporting

confidence: 92%