Hexavalent Chromium Removal by a <i>Paecilomyces</i>sp. Fungal Strain Isolated from Environment

González, Juan Fernando Cárdenas; Rodríguez, Ismael Acosta

doi:10.1155/2010/676243

Cited by 44 publications

(22 citation statements)

References 33 publications

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“…Moreover, Paecilomyces sp. showed its capacity to reduce 50 mg/l Cr (VI), with the associated production of Cr (III) in the growth medium after 7 days of incubation [68]. Congeevaram et al [69], reported that Aspergillus sp.…”

Section: Fungal Chromium Resistancementioning

confidence: 99%

The Geomicrobiology of Chromium (VI) Pollution: Microbial Diversity and its Bioremediation Potential

Al-Battashi

Joshi²,

Pracejus³

et al. 2016

TOBIOTJ

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Abstract:The role and significance of microorganisms in environmental recycling activities marks geomicrobiology one of the essential branches within the environmental biotechnology field. Naturally occurring microbes also play geo-active roles in rocks, leading to biomineralization or biomobilization of minerals and metals. Heavy metals, such as chromium (Cr), are essential micronutrients at very low concentrations, but are very toxic at higher concentrations. Generally, heavy metals are leached to the environment through natural processes or anthropogenic activities such as industrial processes, leading to pollution with serious consequences. The presence of potentially toxic heavy metals, including Cr, in soils does not necessarily result in toxicity because not all forms of metals are toxic. Microbial interaction with Cr by different mechanisms leads to its oxidation or reduction, where its toxicity could be increased or decreased. Chromite contains both Cr(III) and Fe(II) and microbial utilization of Fe(II)-Fe(III) conversion or Cr (III) -Cr (VI) could lead to the break-down of this mineral. Therefore, the extraction of chromium from its mineral as Cr (III) form increases the possibility of its oxidation and conversion to the more toxic form (Cr (VI)), either biologically or geochemically. Cr (VI) is quite toxic to plants, animals and microbes, thus its levels in the environment need to be studied and controlled properly. Several bacterial and fungal isolates showed high tolerance and resistance to toxic Cr species and they also demonstrated transformation to less toxic form Cr (III), and precipitation. The current review highlights toxicity issues associated with Cr species and environmental friendly bioremediation mediated by microorganisms.

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Section: Fungal Chromium Resistancementioning

confidence: 99%

The Geomicrobiology of Chromium (VI) Pollution: Microbial Diversity and its Bioremediation Potential

Al-Battashi

Joshi²,

Pracejus³

et al. 2016

TOBIOTJ

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“…The final set of flasks were used for subsequent plating and isolation of fungi on sludge containing MSM plates. The pH of the medium was maintained at 5.30 with 100 mM L -1 citrate-phosphate buffer 20 . The inoculated petriplates were incubated at 28 ºC for seven days.…”

Section: Isolation and Identification Of Potential Fungal Strainmentioning

confidence: 99%

Bioremediation of Tannery Wastewater by Chromium Resistant Fungal Isolate Fusarium chlamydosporium SPFS2-g

Sharma¹,

Malaviya²

2014

Curr World Environ

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The present study assessed the bioremediation potential of Fusarium chlamydosporium SPFS2-g isolated from tannery effluent enriched soil. The isolate exhibited minimum inhibitory concentration (MIC) for Cr(VI) as 500 ppm. The treatment of tannery wastewater with Fusarium chlamydosporium in shake flask experiment resulted in the reduction of chemical oxygen demand (COD), color, Cr(VI), total suspended solids (TSS), turbidity, Na + , Cl -, and NO 3 -in the order of 71. 80, 64.69, 100, 36.47, 22.77, 11.69, 27.87 and 62.33%, respectively after six days of treatment duration.

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“…However, its requirement for plants is debatable 4,5 . The divalent oxyanions of Cr(VI) are 100-1000 times more toxic, more soluble in water, and more motile and strong oxidizing agent than Cr(III) 6,7 ; hence it has been declared lethal for all living organisms 8 . Thus it is imperative to consider the significance of Cr for soil biota as one gram of soil may comprise 0.005-3 mg of Cr 9 .…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of chromium by Fusarium oxysporum

Khurshid¹,

Shoaib²,

Javaid³

et al. 2016

ScienceAsia

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ABSTRACT:We investigated the impact of both hexavalent and trivalent chromium on mycelial growth and metal accumulation in the wilt pathogen of tomato (Fusarium oxysporum f. sp. lycopersici). Experiments were conducted in liquid growth medium amended with 19 concentrations of either Cr(III) or Cr(VI). Metal-amended medium was inoculated with the pathogen and incubated for 15 days at 25 ± 3°C, 50 rpm, and at pH 5. Generally, the fungal dry biomass was significantly inhibited by 14-64% and 30-95% with increase in concentrations (5-350 ppm) of Cr(III) and Cr(VI), respectively. The fungus was unable to grow at metal concentrations higher than 400 ppm. The metal accumulation by the fungus decreased with an increase in metal concentration. The fungal biomass exhibited the greater accumulation capacity (0.01-2.6 mg/g) for Cr(VI) than that of Cr(III) (0.01-1.86 mg/g). The bioaccumulation factor of the fungus for both oxidation states of Cr ranged between 0.7 and 0.9.

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Hexavalent Chromium Removal by a Paecilomycessp. Fungal Strain Isolated from Environment

Cited by 44 publications

References 33 publications

The Geomicrobiology of Chromium (VI) Pollution: Microbial Diversity and its Bioremediation Potential

The Geomicrobiology of Chromium (VI) Pollution: Microbial Diversity and its Bioremediation Potential

Bioremediation of Tannery Wastewater by Chromium Resistant Fungal Isolate Fusarium chlamydosporium SPFS2-g

Bioaccumulation of chromium by Fusarium oxysporum

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