Microbially induced calcite precipitation and synergistic mineralization cementation mechanism of Pisha sandstone components

Feng, Zhuojun; Li, Xiaoli

doi:10.1016/j.scitotenv.2022.161348

Cited by 11 publications

(4 citation statements)

References 29 publications

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“…It must be remarked that the results of FTIR spectroscopy were consistent with those of both the SEM/EDS analyses and the MICP process. In Figure 7, strong absorption bands were observed at 875 cm -1 and approximately 1414 cm -1 , which is consistent with other researchers [58,59]. They belong to the C-O bond characteristic of CaCO 3 , mainly present in CG group_1 and FA group_2, and confirm the MICP process.…”

Section: Sem/eds and Ftir Precipitation Testsupporting

confidence: 89%

“…Finally, EDS quantification revealed that the elemental composition of the bioprecipitate shown in Figure 6c was mostly calcium, carbon and oxygen (see Figure 6d). In Figure 7, strong absorption bands were observed at 875 cm -1 and approximately 1414 cm -1 , which is consistent with other researchers [58,59]. They belong to the C-O bond characteristic of CaCO3, mainly present in CG group_1 and FA group_2, and confirm the MICP process.…”

Section: Sem/eds and Ftir Precipitation Testsupporting

confidence: 89%

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Novel Understandings of Biomineralization in Backfill Materials: A Fundamental Investigation of Coal Gangue and Fly Ash Impact on B. pasteurii to Enhance Material Properties

Guo,

Fantilli,

Yan

et al. 2024

Applied Sciences

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This paper proposes a fundamental investigation of coal gangue and fly ash impact on B. pasteurii to enhance the properties of backfill materials. The goal is to obtain effective microbial mineralization and potential mechanical properties of coal gangue and fly ash as backfill materials and to mitigate the impact of the most common binders used in the backfill material of mines. Micro-scale mineralization was performed with B. pasteurii bacteria using microbially induced carbonate precipitation (MICP) technology to clarify solid waste impact on B. pasteurii and to bind coal gangue and fly ash. Several tests were carried out to analyze the behavior of B. pasteurii, especially when it coexists with these two waste materials separately. In such cases, it was possible to observe a reduction in mineralization initiation time with respect to the natural mineralization of the MICP technology. Moreover, at the macro-scale, the new mineralized backfilling material shows good workability in the fresh state, whereas the strength at 28 days is 5.34 times higher than that obtained with non-mineralized coal gangue and fly ash.

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Section: Sem/eds and Ftir Precipitation Testsupporting

confidence: 89%

Section: Sem/eds and Ftir Precipitation Testsupporting

confidence: 89%

Novel Understandings of Biomineralization in Backfill Materials: A Fundamental Investigation of Coal Gangue and Fly Ash Impact on B. pasteurii to Enhance Material Properties

Guo,

Fantilli,

Yan

et al. 2024

Applied Sciences

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“…The structure of PS determines its strong impermeability and adsorption [104]. PS could effectively reduce the infiltration capacity of the soil and improve the water-holding capacity.…”

Section: Mine Restoration Green Materialsmentioning

confidence: 99%

Green and Low-Cost Modified Pisha Sandstone Geopolymer Gel Materials for Ecological Restoration: A Phase Review

Li,

Fu,

Cheng

et al. 2024

Gels

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Pisha sandstone (PS) is a special interbedded rock in the middle reaches of the Yellow River that experiences severe weathering and is loose and broken. Due to severe multiple erosion events, the Pisha sandstone region is called “the most severe water loss and soil erosion in the world” and “the ecological cancer of the earth”. As a special pozzolanic mineral, PS has the potential to be used as precursors for the synthesis of green and low-carbon geopolymer gel materials and applied in ecological restoration. This paper aims to undertake a phase review of the precursors for geopolymer gel materials. The genesis and distribution, physical and chemical characterization, erosion characteristics, and advances in the ecological restoration of PS are all summarized. Furthermore, current advances in the use of PS for the synthesis of geopolymer gel materials in terms of mechanical properties and durability are discussed. The production of Pisha sandstone geopolymer gels through the binder jetting technique and 3D printing techniques is prospected. Meanwhile, the prospects for the resource application of PS in mine rehabilitation and sustainable ecology are discussed. In the future, multifactor-driven comprehensive measures should be further investigated in order to achieve ecological restoration of the Pisha sandstone region and promote high-quality development of the Yellow River Basin.

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“…The compressive strength of alkali-activated red PS with 1.5 wt.% NaOH at day 7 increased by 1,450% compared with that of red PS. This occurred because of the polymerized Al and Si network that was obtained from the reaction between active silica and alumina in the PS paste when activated by NaOH and Na 2 SiO 3 (Feng and Li, 2023). There is an optimum addition for the activator although it does depend on the different colors of the PS.…”

Section: The Compressive Strength Of Alkaliactivated Ps Geopolymer Ce...mentioning

confidence: 99%

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

Dong,

Li,

Shi

et al. 2023

Front. Mater.

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Pisha sandstone (PS) is a unique geological structure in the Yellow River basin in China and is a general term for a rock interlayer composed of sandstone, sand shale, and muddy sandstone. The collapsibility of PS results in a high erosion rate and poor vegetation due to its low diagenetic potential and weak structural strength. This study showed that PS can be converted into geopolymer cement by mixing with a suitable alkali activator. PS was converted to geopolymer cement for construction to control soil erosion and conserve the soil and water in this area. Slag was used as a mineral additive to improve the performance of alkali-active PS geopolymer cement in this study. The influence of slag replacement level, NaOH dosages, and curing age on the compressive strength of alkali-activated PS was investigated. Scanning electron microscopy (SEM)/energy dispersive X-ray (EDS), thermogravimetric analyses (TG/DTG), and X-ray diffraction (XRD) were used to analyze the hydration products and microstructure of alkali-activated PS. The results showed that when the samples had 40 wt.% slag, 1.5 wt.% NaOH, and 4.0 wt.% Na2SiO3, their compressive strength could reach 82.0 MPa at 90 days. Compared with the samples with activator and without activator, the compressive strength increased by 6,664% and 9,011%, respectively. The hydration products were C-S-H gel, geopolymer gel, and calcium carbonate crystals. With 10 wt.% slag as a mineral additive, 1.5 wt.% NaOH, and 4 wt.% Na2SiO3 as an activator, the carbonation ratio of C-S-H gel was 49.3%.

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Microbially induced calcite precipitation and synergistic mineralization cementation mechanism of Pisha sandstone components

Cited by 11 publications

References 29 publications

Novel Understandings of Biomineralization in Backfill Materials: A Fundamental Investigation of Coal Gangue and Fly Ash Impact on B. pasteurii to Enhance Material Properties

Novel Understandings of Biomineralization in Backfill Materials: A Fundamental Investigation of Coal Gangue and Fly Ash Impact on B. pasteurii to Enhance Material Properties

Green and Low-Cost Modified Pisha Sandstone Geopolymer Gel Materials for Ecological Restoration: A Phase Review

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

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