Characterisation of Uranium(vi) Sorption by Two Environmental Fungal Species Using Gamma Spectrometry

Gargarello, R.M.; Cavalitto, Sebastián Fernando; Gregorio, Dominic; Niello, J. Fernández; Huck, H.; Pardo, Alejandro Guillermo; Somacal, H.; Curutchet, Gustavo

doi:10.1080/09593330802327069

Cited by 17 publications

(19 citation statements)

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“…35 This was explained in terms of a change in biomass conformation during the drying process, where more adsorption sites could be exposed. Our results were comparable with those found by Gargarello et al 35 In both studies, wet biomass alone presented similar values (the differences could be due to the error method as the concentrations measured are too low). Also, wet BMMTs adsorption data showed slightly lower values reported for dried biomass 35 (being in the same order of magnitude) but with the advantage of being more easily separated from the solution.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Uranium Uptake by Montmorillonite-Biomass Complexes

Olivelli

Curutchet

Sánchez

2013

Ind. Eng. Chem. Res.

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Montmorillonite clays and biomass have noticeable metal sorption capacity. Clays or biomass are difficult to separate from the solution when used as sorbent materials. A methodology to retain biomass and improve separation processes is to generate clay biopolymers matrices from fungal biomass grown on a natural Montmorillonite (MMT). The objective of this study is to generate and characterize clay biopolymers matrices and evaluate their uranium adsorption capacity. The generated clay biopolymers (BMMTs) were characterized through X-ray diffraction, measurement of the apparent diameter of particles, and electrophoretic mobility. Some BMMTs showed greater Uranium-specific adsorption capacity than that found for MMT. The X-ray diffraction analysis indicated that the Uranium was located partially in the clay interlayer. The BMMT surfaces were more negatively charged than the MMT surface, thus favoring their uranium uptake. Also, immobilization of the biomass and better coagulation of the system were achieved. These preliminary studies indicate that BMMTs have a great potentiality for uranium uptake processes.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Uranium Uptake by Montmorillonite-Biomass Complexes

Olivelli

Curutchet

Sánchez

2013

Ind. Eng. Chem. Res.

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“…Carbohydrate metabolism provides energy for various bioprocesses. During uranium(VI) sorption of uraniumresistant fungi, typical oxidative metabolism of carbohydrates is detected (Gargarello et al 2008). In a heavy uraniumcontaminated groundwater microbial community, laterally transferred genes associated with microbial evolution are mainly enriched in carbohydrate transport and metabolism, suggesting that carbohydrate transport and the metabolism of the microbial community may play an important role in the rapid response and adaptation to uranium contamination (Hemme et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Metagenomic analysis of microbial community in uranium-contaminated soil

Yan

Luo

Zhao

2015

Appl Microbiol Biotechnol

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Uranium tailing is a serious pollution challenge for the environment. Based on metagenomic sequencing analysis, we explored the functional and structural diversity of the microbial community in six soil samples taken at different soil depths from uranium-contaminated and uncontaminated areas. Kyoto Encyclopedia of Genes and Genomes Orthology (KO) groups were obtained using a Basic Local Alignment Search Tool search based on the universal protein resource database. The KO-pathway network was then constructed using the selected KOs. Finally, alpha and beta diversity analyses were performed to explore the differences in soil bacterial diversity between the radioactive soil and uncontaminated soil. In total, 30-68 million high-quality reads were obtained. Sequence assembly yielded 286,615 contigs; and these contigs mostly annotated to 1699 KOs. The KO distributions were similar among the six soil samples. Moreover, the proportion of the metabolism of other amino acids (e.g., beta-alanine, taurine, and hypotaurine) and signal transduction was significantly lower in radioactive soil than in uncontaminated soil, whereas the proportion of membrane transport and carbohydrate metabolism was higher. Additionally, KOs were mostly enriched in ATP-binding cassette transporters and two-component systems. According to diversity analyses, Actinobacteria and Proteobacteria were the dominant phyla in radioactive and uncontaminated soil, and Robiginitalea, Microlunatus, and Alicyclobacillus were the dominant genera in radioactive soil. Taken together, these results demonstrate that soil microbial community, structure, and functions show significant changes in uranium-contaminated soil. The dominant categories such as Actinobacteria and Proteobacteria may be applied in environmental governance for uranium-contaminated soil in southern China.

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“…Although many species (PbOH + , Pb 2 OH 3+ , Pb(OH) 4 2− , Pb(OH) 3 − and Pb 2+ ) can be viewed as potential sorbates in the biosorption of lead ions from ternary solutions (Pb/Cu/Zn), the data presented in this study suggest that, under experimental conditions (pH eq < 5.9) (see Fig. 6), the species responsible for the removal of lead ions is the predominant one in the species distribution, namely the Pb(II) ions.…”

Section: Effect Of Interference By Metal Ionsmentioning

confidence: 99%

“…In recent years there has been considerable interest in the use of sorbent materials, particularly biosorbents [2] such as wheat straw [3], sonicated activated sludge [4], tobacco dust [5], wheat shell [6], stalk waste [7], bael leaves [8], agricultural by-products [9] and microbes [10]. Sorption by biomass is now recognized as an alternative method for the treatment of wastewaters containing heavy metals [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%