Bioleaching of silicon in electrolytic manganese residue (EMR) by Paenibacillus mucilaginosus: Impact of silicate mineral structures

Lv, Ying; Li, Jia; Ye, Hengpeng; Du, Dongyun; Sun, Peng; Ma, Mengyu; Zhang, Tian C.

doi:10.1016/j.chemosphere.2020.127043

Cited by 20 publications

(8 citation statements)

References 17 publications

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“…the in uence of silicate minerals on silicon activation in a bioleaching system followed the following order: layered > chained > island > frame. These outcomes are consistent with the results of the bioleaching of silicate minerals with Paenibacillus mucilaginosus in our previous study (Lv et al, 2020). The minerals that are more di cult to decompose would have less components available for bacteria to utilize, be worse for the growth of Ochrobactium sp.…”

Section: Discussionsupporting

confidence: 91%

“…The quartz (diameter (D) < 0.150 mm) was formed with a frame crystal structure; muscovite (with an average size of length (L) = 3.0 cm, width (W) = 5.5 cm, and height (H) = 0.1 mm) and biotite (L x W x H < 3.5 cm x 7.0 cm x 2.0 cm) were formed with a layered crystal structure; and olivine (D = 0.3 cm) and rhodonite (L x W x H < 3.0 cm x 3.5 cm x 2.0 cm) had an island and chained crystal structure. The total silicon in muscovite, biotite, olivine and rhodonite was about 45wt%, while 90wt% in quartz (Lv et al, 2020). The samples were dried in an electrothermal blowing drying oven (101-2AB, Tianjin Tester Instrument Co. Ltd., China) at 105ºC for 24 h, ground with a pulverizer (LINGSUM, China) and screened with a Nylon mesh (100 mesh, Shangyu Shenchao Instrument, China) to make the sample particles evenly distributed and ready for use in the bioleaching tests.…”

Section: Silicate Mineralsmentioning

confidence: 96%

“…In EMR, different silicate minerals have different crystal structures due to the different forms of siliconoxygen bonding mode (Man et al, 2015). Lv et al (Lv et al, 2020) reported that the main silicate minerals in the EMR include frame quartz, layered muscovite and biotite, island olivine and chained rhodonite. The existing knowledge gaps are that, the interactions between bacteria and minerals as well as the associated mechanisms for and effects of silicon activation in a bioleaching process are unclear at all.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Different Silicate Minerals on Silicon Activation by Ochrobactrum sp. T-07-B

Chen

et al. 2021

Preprint

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As a kind of solid waste with a high silicon content, electrolytic manganese residue (EMR) can be utilized as silicon source by plants through bioleaching processes. EMR contains a variety of silicate minerals. In order to determine the source of available silicon in the bioleaching process of EMR, it is necessary to investigate the influence of silicate minerals in EMR on silicon-activating behavior of specific minerals. In this study, Ochrobactium sp. T-07-B was used to conduct bioleaching experiments on five kinds of silicate minerals with different structures (quartz, muscovite, biotite, olivine, and rhodonite); the growth of Ochrobactium sp. T-07-B, their acid- and polysaccharide-producing capacity, and evolution of surface morphology and structure of the silicate minerals in different systems were determined, so as to explore the silicon-activating capacity of Ochrobactium sp. T-07-B and the selectivity toward different minerals in the bioleaching process. Results showed that the effects of Ochrobactium sp. T-07-B for different silicate minerals were obviously different, and the sequence of silicon-activating efficiency from high to low was as follows: muscovite > biotite > rhodonite > olivine > quartz. Results of this study may be of guiding significance for the future research on the silicon-activating of solid waste.

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Section: Discussionsupporting

confidence: 91%

Section: Silicate Mineralsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Effects of Different Silicate Minerals on Silicon Activation by Ochrobactrum sp. T-07-B

Chen

et al. 2021

Preprint

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“…After bioleaching, the tailings became loose and uneven, covered by a layer of finely divided particles on the surface. The cracks on the surface of the tailings sample radiated from a central point to the surroundings, and the degree of fragmentation was unequal, which seemed to confirm the selectivity of the bacteria for mineral leaching (Lv et al 2020). The EDS results showed that the Fe content in the surface of the original tailings was minimal, and there was almost no K element.…”

Section: Sem-eds Analysismentioning

confidence: 76%

Enhanced effect of biochar on leaching vanadium and copper from stone coal tailings by Thiobacillus ferrooxidans

Dong

Chong

Lin

2021

Environ Sci Pollut Res

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Among the many extraction technologies for recovering metal resources from tailings, bioleaching technology is gradually showing its momentum. In our research, the enhanced effect of biochar on the bioleaching of stone coal tailings by Thiobacillus ferrooxidans (T. ferrooxidans) has been explored. In the static bioleaching experiment for 10 days, the leaching rate of vanadium (V) and copper (Cu) increased by 26.8% and 21.0% respectively after adding 5 g/L biochar. The dynamic bioleaching experiment further verified that under the promotion of biochar, the 44 day cumulative leaching rate of V and Cu increased by 15.3% and 14.5%, respectively. The promoting effect of biochar on T. ferrooxidans was mainly reflected in two aspects. The unique porous structure of biochar created a microenvironment for free microorganisms for inhabitation, while storing abundant nutrients. Biochar can also act as an excellent electronic medium to promote electron transfer, improving the oxidation ability of T. ferrooxidans on Fe 2+ . Furthermore, the presence of biochar may effectively inhibit the formation of jarosite precipitation on tailings in bioleaching, thereby improving the dissolution of tailings and the release of metal elements. This study demonstrates that biochar-enhanced bioleaching may be an efficient and environmentally friendly method for recovering metal resources from tailings.

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“…8,9 The calcined EMR has hydration activity and gelation. 10,11 Gel materials prepared by adding cement, lime, and other materials to EMR can absorb soluble harmful substances in EMR, with a compressive strength of 18.85 MPa, and the stability efficiency of NH 4+ and Mn 2+ can achieve more than 95%. 12 Adding waste glass, dolomite and kaolin to EMR and using sawdust and toner as a foaming agent can be used for firing porous ceramics.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrolytic manganese residue (EMR) to co‐sintering mechanism of ceramic aggregate

Dongdong

et al. 2022

Int J Applied Ceramic Tech

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The influences of co-sintering temperature on the physical properties of EMR (electrolytic manganese residue) ceramic aggregate were investigated over the gradient of co-sintering by EMR, CFA (coal fly ash), and P (perlite) that were used as raw materials. Seven EMR samples were prepared to sinter at different temperatures that were decided by the data of a thermal mass spectrometer, and four ceramic aggregate embryos were sintered at 1120, 1140, 1160, and 1180 • C. The mechanisms of co-sintering temperature action on performance were determined by means of X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The optimal temperature of 1160 • C and the temperature increment lead to an enhancement of cylinder compressive strength and a damping of 1-h water absorption, softening coefficient, and grain shape coefficient was discovered. Gypsum of EMR dissolved and exhausted gas during co-sintering resulted in CaO. The crystalline transformation of wollastonite and gehlenite produced anorthite, which boosts the strength of aggregate and the content of anorthite, was proportional to the co-sintering temperature and the pressure strength of cylinder. The liquid phase of "overfiring"-coated crystal contributed to the further improvement of strength, but the aggregate sphere deformation generated a reduction of comprehensive performance. The formation of bustamite calcian in co-sintered ceramic aggregate realized the solidification of Mn, and the solidification rate of leaching toxicity test was 99.92%, and the absence of radioactivity was demonstrated.

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Bioleaching of silicon in electrolytic manganese residue (EMR) by Paenibacillus mucilaginosus: Impact of silicate mineral structures

Cited by 20 publications

References 17 publications

Effects of Different Silicate Minerals on Silicon Activation by Ochrobactrum sp. T-07-B

Effects of Different Silicate Minerals on Silicon Activation by Ochrobactrum sp. T-07-B

Enhanced effect of biochar on leaching vanadium and copper from stone coal tailings by Thiobacillus ferrooxidans

Effects of electrolytic manganese residue (EMR) to co‐sintering mechanism of ceramic aggregate

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