Chromium(VI) resistance and removal by actinomycete strains isolated from sediments

Polti, Marta Alejandra; Amoroso, Maria Julia del R.; Abate, Carlos Mauricio

doi:10.1016/j.chemosphere.2006.11.008

Cited by 120 publications

(87 citation statements)

References 35 publications

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“…MC1, resistant to Cr(VI) and previously isolated and characterized, was used for this work [23]. The strain was maintained on starch-casein agar slants (SC agar) containing (g l [26] (SE II).…”

Section: Methodsmentioning

confidence: 99%

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Bioremediation of chromium(VI) contaminated soil by Streptomyces sp. MC1

Polti

García

Amoroso

et al. 2009

J. Basic Microbiol.

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This work provides quantitative information on Cr(VI) reduction in soil samples by an indigenous actinomycete. Streptomyces sp. MC1, previously isolated from sugarcane, has shown ability to reduce Cr(VI) in liquid minimal medium. A reduction of 100 and 75% was obtained at initial Cr(VI) concentrations of 5 and 50 mg l(-1), respectively, after 48 h of incubation. Bioremediation ability of Streptomyces sp. MC1 was assayed in soil extracts and soil samples. Relative growth of Streptomyces sp. MC1 was 77 and 38% when grown in soil extract with 10 and 50 mg l(-1) of Cr(VI), respectively. MC1 was able to reduce 30% of Cr(VI) after 96 h of incubation with 10 mg l(-1) of Cr(VI), and reduction coincided with the exponential growth phase at pH 7 and 30 degrees C.In soil samples, Streptomyces sp. MC1 was able to reduce up to 94% of the Cr(VI) bioavailability (50 mg kg(-1)) after 7 d. These results were compared with non-inoculated soil samples with Cr(VI). Bioremediation activity of Streptomyces sp. MC1 was not inhibited by natural soil microbial flora. Besides, Streptomyces sp. MC1 growth was not inhibited by 50 mg kg(-1) of Cr(VI). In contrast to findings obtained by other authors, our results showed almost complete Cr(VI) removal from soil without any previous treatment, and without addition of any substrate and with a normal soil humidity level. These results confirm the Cr(VI)-contaminated soil bioremediation potential of Streptomyces sp. MC1.

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Section: Methodsmentioning

confidence: 99%

“…However, Streptomyces sp. MC1, isolated from sugar cane, was selected because it showed significant growth and capacity to remove Cr(VI) in liquid minimal medium [23], abilities that may be useful for bioremediation processes.…”

Section: Introduction *mentioning

confidence: 99%

Bioremediation of chromium(VI) contaminated soil by Streptomyces sp. MC1

Polti

García

Amoroso

et al. 2009

J. Basic Microbiol.

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“…In this race bacteria, algae, fungi, actinomycetes, yeast, activated sludge and various other biopolymers have been well recognized for heavy metal removal directly or indirectly [4,[6][7][8][9][10][11][12]. In this context the role of algae is known for a few decades, but has received increased attention only in recent years because of its potential for application in environmental protection or recovery of precious or strategic metals [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Pb2+ and Zn2+ by Non-Living Biomass of Spirulina sp.

et al. 2010

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Removal of heavy metals (Pb 2? , Zn 2? ) from aqueous solution by dried biomass of Spirulina sp. was investigated. Spirulina rapidly adsorbed appreciable amount of lead and zinc from the aqueous solutions within 15 min of initial contact with the metal solution and exhibited high sequestration of lead and zinc at low equilibrium concentrations. The specific adsorption of both Pb 2? and Zn 2?increased at low concentration and decreased when biomass concentration exceeded 0.1 g l -1 . The binding of lead followed Freundlich model of kinetics where as zinc supported Langmuir isotherm for adsorption with their r 2 values of 0.9659 and 0.8723 respectively. The adsorption was strongly pH dependent as the maximum lead biosorption occurred at pH 4 and 10 whereas Zn 2? adsorption was at pH 8 and 10.

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“…Albarracin et al (2005) isolated actinomycetes from a copper-contaminated area. Polti (2007) characterized and identified some of chromium-(VI)-resistant actinomycetes strains as species of the genera Streptomyces and Amycolatopsis. Schmidt et al (2007) showed that strain Streptomyces acidiscabies E13 tolerated high concentrations of heavy metals (Ni, Cu, Cd, Cr, Mn, Zn, Fe).…”

Section: Introductionmentioning

confidence: 99%

Actinobacteria occurrence and their metabolic characteristics in the nickel-contaminated soil sample

et al. 2014

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Heavy metals are a significant source of pollution in soils that have been demonstrated to exert significant toxic effect on soil microbial assemblages. Here we investigate the occurrence and metabolic characteristics of actinobacteria, which form a predominated component of farmland bacterial community near the town of Sereď in southwest Slovakia, contaminated by close nickel ore facility. Actinobacteria occurred in this environment with high concentrations of nickel (2.109 mg/kg), slightly above the natural occurrence of cobalt (355 mg/kg) and zinc (177 mg/kg), even too low concentration of iron (35.75 mg/kg) for a normal soil and not a toxic amount of copper (32.2 mg/kg) and cadmium (<0.25 mg/kg). The phylogeny was reconstructed using partial sequences of 16S rDNA genes of both, actinobacterial isolates and clones. A total of 105 actinobacterial representatives were divided into 66 species belonging to one order, 7 genera and 5 uncategorized groups. The selected 14 morphologically distinct isolates were able to produce drop collapsing, haemolytic and lipase activities. Whereas only 4 isolates produced dark brown melanin pigment and only 5 of them produced decolourization of the azo dye, all isolates tested were capable of assimilating all 11 sugars tested. All these actinobacterial isolates were resistant to nickel, cobalt, zinc, cadmium, copper, but the level of resistance differed between the individual isolates, and the resistance profiles of antibiotics (gentamycin, ampicillin, ciprofloxacin, chloramphenicol, erythromycin, rifampicin, penicillin-G) varied among them to a certain extent. Our results suggested that actinobacteria in soil contaminated by nickel present a relatively divergent group inside of microbial assemblage.

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Chromium(VI) resistance and removal by actinomycete strains isolated from sediments

Cited by 120 publications

References 35 publications

Bioremediation of chromium(VI) contaminated soil by Streptomyces sp. MC1

Bioremediation of chromium(VI) contaminated soil by Streptomyces sp. MC1

Biosorption of Pb2+ and Zn2+ by Non-Living Biomass of Spirulina sp.

Actinobacteria occurrence and their metabolic characteristics in the nickel-contaminated soil sample

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