Investigation on mechanism of Cr(VI) reduction and removal by Bacillus amyloliquefaciens, a novel chromate tolerant bacterium isolated from chromite mine soil

Das, Sasmita; Mishra, Jibitesh; Das, Saroj Kumar; Pandey, Satish Kumar; Rao, D. Sreenivasa; Chakraborty, Anindita; Sudarshan, M.; Das, Nigamananda; Thatoi, Hrudayanath

doi:10.1016/j.chemosphere.2013.08.080

Cited by 201 publications

(67 citation statements)

References 27 publications

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“…were abundant in the unfavorable environment of the V-Ti magnetite mine tailing soil. Autochthonous Bacillus from mine tailing in South Korea showed the ability to biomineralize heavy metals, such as Pb and Cr [49], [50]. Ochrobactrum spp.…”

Section: Discussionmentioning

confidence: 99%

Culturable Heavy Metal-Resistant and Plant Growth Promoting Bacteria in V-Ti Magnetite Mine Tailing Soil from Panzhihua, China

Chu

et al. 2014

PLoS ONE

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To provide a basis for using indigenous bacteria for bioremediation of heavy metal contaminated soil, the heavy metal resistance and plant growth-promoting activity of 136 isolates from V-Ti magnetite mine tailing soil were systematically analyzed. Among the 13 identified bacterial genera, the most abundant genus was Bacillus (79 isolates) out of which 32 represented B. subtilis and 14 B. pumilus, followed by Rhizobium sp. (29 isolates) and Ochrobactrum intermedium (13 isolates). Altogether 93 isolates tolerated the highest concentration (1000 mg kg−1) of at least one of the six tested heavy metals. Five strains were tolerant against all the tested heavy metals, 71 strains tolerated 1,000 mg kg−1 cadmium whereas only one strain tolerated 1,000 mg kg−1 cobalt. Altogether 67% of the bacteria produced indoleacetic acid (IAA), a plant growth-promoting phytohormone. The concentration of IAA produced by 53 isolates was higher than 20 µg ml−1. In total 21% of the bacteria produced siderophore (5.50–167.67 µg ml−1) with two Bacillus sp. producing more than 100 µg ml−1. Eighteen isolates produced both IAA and siderophore. The results suggested that the indigenous bacteria in the soil have beneficial characteristics for remediating the contaminated mine tailing soil.

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Section: Discussionmentioning

confidence: 99%

Culturable Heavy Metal-Resistant and Plant Growth Promoting Bacteria in V-Ti Magnetite Mine Tailing Soil from Panzhihua, China

Chu

et al. 2014

PLoS ONE

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“…Biological methods, such as bioreduction, bio-accumulation or biosorption using microorganisms, have been examined for their chromium removal abilities [15][16][17] and these methods offer potential alternatives to existing technologies of Cr(VI) removal. Until now, most Cr(VI) removal by microbes was obtained using pure culture techniques under either anaerobic or aerobic conditions depending on the species [18][19][20][21][22][23]. Under anaerobic conditions, both abiotic and biotic reduction mechanisms are competitive (over time, pH may increase due to the mineralization of organic matter to CO 2 , which increases HCO 3 -concentration, or owing to an acid-consuming redox reaction).…”

Section: Introductionmentioning

confidence: 99%

Molasses as an efficient low-cost carbon source for biological Cr(VI) removal

Michailides

Tekerlekopoulou

Akratos

et al. 2015

Journal of Hazardous Materials

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“…41 Thus, biotreatment methods are widely studied for Cr(VI) remediation. [3][4][5][6][7][8][9][10]40 It was reported that the tannery, electroplating and metal-based industry wastewaters (pH 2.0−8.3) generally contained 14.16−534 mg L −1 Cr, 4.2−13.7 mg L −1 Fe(III), and 19.8 mg L −1 SO 4 2− . 3,42,43 If traditional biotreatments were used, Fe(III) and SO 4 2− can be reduced by iron and sulfate-reducing bacteria, respectively, and then the formed Fe(II) and sulfide reduce Cr(VI).…”

Section: ■ Resultsmentioning

confidence: 99%

“…10 The Cr(VI) reduction rate generally ranged from 0.24 to 2.22 mg Cr(VI) L −1 h −1 . 3,5 In the present study, the newly isolated strain Acinetobacter sp. HK-1 was capable of simultaneously reducing Cr(VI) (1.64 mg Cr(VI) L −1 h −1 at an initial concentration of 55 mg L −1 ) to Cr(III) and immobilizing Cr(III) under anaerobic conditions.…”

Section: ■ Resultsmentioning

confidence: 99%

Cr(VI) Reduction and Cr(III) Immobilization by Acinetobacter sp. HK-1 with the Assistance of a Novel Quinone/Graphene Oxide Composite

Zhang

Lü

Wang

et al. 2014

Environ. Sci. Technol.

133

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Cr(VI) biotreatment has attracted a substantial amount of interest due to its cost effectiveness and environmental friendliness. However, the slow Cr(VI) bioreduction rate and the formed organo-Cr(III) in solution are bottlenecks for biotechnology application. In this study, a novel strain, Acinetobacter sp. HK-1, capable of reducing Cr(VI) and immobilizing Cr(III) was isolated. Under optimal conditions, the Cr(VI) reduction rate could reach 3.82 mg h(-1) g cell(-1). To improve the Cr(VI) reduction rate, two quinone/graphene oxide composites (Q-GOs) were first prepared via a one-step covalent chemical reaction. The results showed that 2-amino-3-chloro-1,4-naphthoquinone-GO (NQ-GO) exhibited a better catalytic performance in Cr(VI) reduction compared to 2-aminoanthraquinone-GO. Specifically, in the presence of 50 mg L(-1) NQ-GO, a Cr(VI) removal rate of 190 mg h(-1) g cell(-1), which was the highest rate obtained, was achieved. The increased Cr(VI) reduction rate is mainly the result of NQ-GO significantly increasing the Cr(VI) reduction activity of cell membrane proteins containing dominant Cr(VI) reductases. X-ray photoelectron spectroscopy analysis found that Cr(VI) was reduced to insoluble Cr(III), which was immobilized by glycolipids secreted by strain HK-1. These findings indicate that the application of strain HK-1 and NQ-GO is a promising strategy for enhancing the treatment of Cr(VI)-containing wastewater.

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Investigation on mechanism of Cr(VI) reduction and removal by Bacillus amyloliquefaciens, a novel chromate tolerant bacterium isolated from chromite mine soil

Cited by 201 publications

References 27 publications

Culturable Heavy Metal-Resistant and Plant Growth Promoting Bacteria in V-Ti Magnetite Mine Tailing Soil from Panzhihua, China

Culturable Heavy Metal-Resistant and Plant Growth Promoting Bacteria in V-Ti Magnetite Mine Tailing Soil from Panzhihua, China

Molasses as an efficient low-cost carbon source for biological Cr(VI) removal

Cr(VI) Reduction and Cr(III) Immobilization by Acinetobacter sp. HK-1 with the Assistance of a Novel Quinone/Graphene Oxide Composite

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