The effects of K+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

Wang, Hailei; Kong, Fanjing; Zheng, Mianping

doi:10.1007/s11427-006-0123-5

Cited by 5 publications

(7 citation statements)

References 27 publications

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“…The Daggyai geothermal field is known for its high cesium (Cs) hot springs and Cs‐bearing geyserites (0.32–1.55 wt.% Cs, data from Zheng, 1989) occurrences. Published work has largely focused on the Cs accumulation mechanism (Wang, Kong, & Zheng, 2006;Wang, Zheng, & Huang, 2007;Wang, Zheng, & Kong, 2012), the location and mobilization of Cs in geyserites (Zhou, Ren, Sherriff, & Yao, 2013), the age of the Cs deposit (Chen & Feng, 1993;Zhao et al., 2006a), the hydrochemical composition of the hot spring waters (Guo, Planer‐Friedrich, Liu, Yan, & Wu, 2019;Liu et al., 2019;Wang, Shen, Liang, Jiang, & Liao, 2015;Zhang, 2014), and the microbial community in the hot springs (Zhang et al., 2018). The fabrics and origin of the host deposit, the Daggyai geyserites, however, have rarely been studied (Zhang, 2007;Zhao et al., 2008).…”

Section: Introductionmentioning

confidence: 99%

Microbial fabrics of geyserites around hot spring pools in Daggyai, Tibet, China

Jones

et al. 2020

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The Daggyai geyserites serve as hosts for cesium deposits; however, their origin, whether by chemical deposition or biological formation, is a topic of debate. To decipher the origin of geyserites, the petrographic features of the geyserite samples were examined. The geyserites exhibited columnar laminated, planar laminated and spicular morphologies. Furthermore, they contained morphological and confocal microscopic evidence of the coccoid, bacilliform and filamentous microbes that formed them. Minor calcite and quartz crystals were found locally in the columnar laminated and spicular geyserites. Cyanobacteria tentatively assigned to the genus Calothrix dominated in the planar and columnar laminated geyserites, but were rare in the spicular geyserites. The results demonstrated that the microbes contributed to the Daggyai geyserite formation.

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Section: Introductionmentioning

confidence: 99%

Microbial fabrics of geyserites around hot spring pools in Daggyai, Tibet, China

Jones

et al. 2020

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“…TibetanG7 occurred rapidly within the first 5 min, suggesting that uptake occurred to a considerable extent extracellularly. IR spectroscopy indicated that the accumulation of cesium by this bacterium is a process of homeostasis with cesium initially accumulated on the cell wall [26] .…”

Section: Discussionmentioning

confidence: 98%

“…They may not be growing in K + -sufficient condition, and thus may be induced to some extent to K + -deficient cells. It is known that K + -regimes play a significant role in cesium accumulation by microorganisms [22,26] , and microorganisms accumulate much more cesium in K + -deficient cells than in K + -sufficient cells. Therefore, higher levels of cesium accumulation by bacterium Thermus sp.…”

Section: Discussionmentioning

confidence: 99%

Cesium accumulation by bacterium Thermus sp. TibetanG7: hints for biomineralization of cesium-bearing geyserite in hot springs in Tibet, China

2007

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The bacterium Thermus sp. TibetanG7, isolated from hot springs in Tibet, China, was examined for the ability to accumulate cesium from solutions. Environmental conditions were simulated and the effects of pH, K + , Na + and K + -regimes were then studied to determine the possible role of the bacterium in the formation of cesium-bearing geyserite around these hot springs. In despite of the inhibition of K + and Na + , the bacterium Thermus sp. TibetanG7 revealed noticeable accumulation of cesium from solutions, with maximum accumulations of 53.49 and 40.41 μmol Cesium/g cell dry weight in Na + and K + inhibition experiments, respectively. The accumulation of cesium by this microorganism is rapid, with 40%-50% accumulated within the first 5 min. K + -deficient cells showed a much higher capacity of cesium accumulation compared with K + -sufficient cells. It is evident that the bacteria within the genus thermus play a significant role in the cesium assembly. The formation of cesium-bearing geyserite is also considered.cesium, cesium-bearing geyserite, Thermus sp. TibetanG7, accumulation, ore formation model

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“…Culture experiments indicated that all the dominant cyanobacteria in the Daggyai geothermal area have the ability to accumulate Cs extracellularly and intracellularly through biosorption (Wang et al, 2006(Wang et al, , 2007(Wang et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

Cs enrichment controlled by microbial community: Evidence from sinters along a temperature gradient of the Daggyai Major Geyser, Tibet

Jones

2022

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Following Renaut and Jones (2011), the term sinter is applied to the silica deposits that are precipitated from hot waters (>50°C) at the vents of high-temperature hot springs and geysers, and from cooler waters on their discharge aprons. Sinters like these are commonly associated with geothermal mineralization (Rimstidt & Cole, 1983;Xiao et al., 2017;Zheng et al., 1995). The Daggyai geothermal field in Tibet, for example, is known for its high-grade caesium (Cs) deposits (0.32-1.55 wt.% Cs, data from Zheng, 1989) that are hosted in sinters that developed from hot spring waters that have a very high Cs concentration (6.45 mg/L, data from Zheng, 1989). These have been studied extensively in order to establish the Cs enrich-

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The effects of K+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

Cited by 5 publications

References 27 publications

Microbial fabrics of geyserites around hot spring pools in Daggyai, Tibet, China

Microbial fabrics of geyserites around hot spring pools in Daggyai, Tibet, China

Cesium accumulation by bacterium Thermus sp. TibetanG7: hints for biomineralization of cesium-bearing geyserite in hot springs in Tibet, China

Cs enrichment controlled by microbial community: Evidence from sinters along a temperature gradient of the Daggyai Major Geyser, Tibet

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