Characterization of Five Chromium-Removing Bacteria Isolated from Chromium-Contaminated Soil

He, Zhiguo; Li, Shuzhen; Wang, Lisha; Zhong, Hui

doi:10.1007/s11270-014-1904-2

Cited by 29 publications

(7 citation statements)

References 47 publications

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“…Since chromium has deleterious effects on both heterotrophic and phototrophic bacteria (Cervantes et al, 2001;Viti and Giovannetti, 2001;Ackerley et al, 2006), the detection of diverse bacteria in our mats suggests their possible tolerance to chromium. Proteobacteria and Firmicutes have been previously detected in Cr(VI) impacted ecosystems (Ackerley et al, 2006;Desai et al, 2009;He et al, 2014;Jordaan et al, 2019). While Firmicutes and Proteobacteria constituted 2-36% to 16-67%, respectively, of the total number of sequences in Nakhl and Samail mats, they made up to 31-53% and 18-47% in samples from chromium-polluted industrial landfill sites, respectively (Desai et al, 2009).…”

Section: Bacterial Diversity In the Original Matsmentioning

confidence: 99%

The Role of Microbial Mats in the Removal of Hexavalent Chromium and Associated Shifts in Their Bacterial Community Composition

et al. 2020

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Microbial mats are rarely reported for chromium-polluted ecosystems, hence information on their bacterial diversity and role in chromium removal are very scarce. We investigated the role of nine microbial mats, collected from three quarry sumps of chromium mining sites, in the removal of hexavalent chromium [Cr(VI)]. Bacterial diversity in these mats and community shifts after incubation with Cr(VI) have been investigated using MiSeq sequencing. In nature, a chromium content of 1,911 ± 100 mg kg −1 was measured in the microbial mats, constituting the third highest source of environmentally available chromium. The mats were able to remove 1 mg l −1 of Cr(VI) in 7 days under aerobic conditions. MiSeq sequencing of the original mats yielded 46-99% of the sequences affiliated to Proteobacteria, Firmicutes and Actinobacteria. When the mats were incubated with Cr(VI), the bacterial community shifted in the favor of Alphaproteobacteria and Verrucomicrobiae. We conclude that microbial mats in the quarry sumps harbor diverse microorganisms with the ability to remove toxic Cr(VI), hence these mats can be potentially used to remove chromium from polluted waters.

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Section: Bacterial Diversity In the Original Matsmentioning

confidence: 99%

The Role of Microbial Mats in the Removal of Hexavalent Chromium and Associated Shifts in Their Bacterial Community Composition

et al. 2020

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“…Since the major components of EPS are not only polysaccharides but also proteins and lipids, with minor contents of nucleic acids and other reductive substances, EPS usually represent sorption and even reduction site for pollutants such as heavy metal ions [38,39]. He et al [40] found that more Cr was removed when large amounts of EPS were produced and suggested that the EPS contributed to the Cr(VI) removal. Cr(III) binds with EPS through phosphate groups have also been reported by Kantar et al [41] and Dogan et al [15].…”

Section: Analysis Of Cr Speciation In the Biofilms By Xasmentioning

confidence: 99%

Determination of the accumulation, spatial distribution and reduction of Cr in unsaturated Pseudochrobactrum saccharolyticum LY10 biofilms by X-ray fluorescence and absorption methods

Long

Zou

Hashmi

et al. 2015

Chemical Engineering Journal

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“…The neighbour-joining phylogenetic tree reflected the phylogenetic relationship of strain QH-2 with some Microbacterium species in BLAST and other Cr(VI) reduction strains reported by Zhu et al [1], Liu et al [2], Ge et al [3], Huang et al [4], He et al [5], Raja et al [6], Zheng et al [7], Hong et al [8], Xu et al [9], Zhang et al [10], and Rao et al [11]. …”

Section: Figurementioning

confidence: 65%

Recognition of a New Cr(VI)-Reducing Strain and Study of the Potential Capacity for Reduction of Cr(VI) of the Strain

Wang

Cui

2019

BioMed Research International

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The biotransformation of hexavalent chromium [Cr(VI)] via Cr(VI)-reducing microorganisms is considered an ecofriendly approach to detoxify Cr(VI). A new Cr(VI)-reducing bacterium named Microbacterium sp. QH-2 was isolated in this study. Scanning electron microscopy (SEM) images showed protrusions on the bacterial surface of strain QH-2 after an 18 h incubation in media under 10 mM Cr(VI) treatment. Results of the experiments on the capacity of reducing Cr(VI) indicated that strain QH-2 could reduce 100% Cr(VI) less than 48-96 h. When media with 4 mM Cr(VI) were incubated, the fastest reduction rate of strain QH-2 could come up to 2.17 mg/L Cr(VI) h−1. Furthermore, strain QH-2 could reduce Cr(VI) over the pH between 7 and 10. The optimum pH to reduce Cr(VI) by strain QH-2 was 9. Strain QH-2 also exhibited a relatively high tolerance even to 20 mM Cr(VI). These results declared that strain QH-2 had the potential to detoxify Cr(VI) in the Cr(VI)-contaminated soil or effluent.

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Characterization of Five Chromium-Removing Bacteria Isolated from Chromium-Contaminated Soil

Cited by 29 publications

References 47 publications

The Role of Microbial Mats in the Removal of Hexavalent Chromium and Associated Shifts in Their Bacterial Community Composition

The Role of Microbial Mats in the Removal of Hexavalent Chromium and Associated Shifts in Their Bacterial Community Composition

Determination of the accumulation, spatial distribution and reduction of Cr in unsaturated Pseudochrobactrum saccharolyticum LY10 biofilms by X-ray fluorescence and absorption methods

Recognition of a New Cr(VI)-Reducing Strain and Study of the Potential Capacity for Reduction of Cr(VI) of the Strain

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