Investigating the potential for microbially induced carbonate precipitation to treat mine waste

Proudfoot, Dylan; Brooks, Loran; Gammons, Christopher H.; Barth, Edwin F.; Bless, Diana; Nagisetty, Raja M.; Lauchnor, Ellen G.

doi:10.1016/j.jhazmat.2021.127490

Cited by 27 publications

(14 citation statements)

References 49 publications

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“…The reduction in leachate is often assessed through the decrease in the soluble–exchangeable fraction, which indicates contaminant bioavailability and mobility [ 18 , 22 , 34 , 35 , 36 ]. Leachate is also reduced by the surface deposition and clogging of pore spaces via CaCO 3 crystals [ 21 , 37 ]. The development of the biocement matrix will create an impermeable barrier by establishing a plugging effect [ 38 , 39 ].…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

“…The development of the biocement matrix will create an impermeable barrier by establishing a plugging effect [ 38 , 39 ]. For specificity, remediation via MICP can be direct (fixed in CaCO 3 or MCO 3 precipitates [ 35 , 39 , 40 , 41 ]) or indirect (via metal(loid)-CaCO 3 complexes [ 21 , 22 , 42 ], inclusion in the crystal structure [ 35 , 40 , 42 ], and/or sorption [ 35 , 39 ]). The inclusion of metal(loid)s into the crystal structure occurs from divalent cations similar to Ca 2+ ions (i.e., ion radius and ion charge), which are integrated into the crystal matrix by substitution/ion exchange, or are integrated via fissures and/or interstices [ 42 ].…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

“…[ 22 , 47 , 48 , 49 ]. This crust can decrease water absorption and permeability through the specimen [ 48 , 50 ], reducing metal(loid)-contaminated leachate [ 21 , 37 ]. The precipitation of CaCO 3 crystals within the pore spaces will also decrease permeability, while simultaneously increasing strength [ 22 , 50 ].…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

See 2 more Smart Citations

Microbially Induced Calcium Carbonate Precipitation as a Bioremediation Technique for Mining Waste

Wilcox,

Mulligan,

Neculita

2024

Toxics

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Mining waste represents a global issue due to its potential of generating acidic or alkaline leachate with high concentrations of metals and metalloids (metal(loid)s). Microbial-induced calcium carbonate precipitation (MICP) is an engineering tool used for remediation. MICP, induced via biological activity, aims to precipitate calcium carbonate (CaCO3) or co-precipitate other metal carbonates (MCO3). MICP is a bio-geochemical remediation method that aims to immobilize or remove metal(loid)s via enzyme, redox, or photosynthetic metabolic pathways. Contaminants are removed directly through immobilization as mineral precipitates (CaCO3 or MCO3), or indirectly (via sorption, complexes, or inclusion into the crystal structure). Further, CaCO3 precipitates deposited on the surface or within the pore spaces of a solid matrix create a clogging effect to reduce contaminant leachate. Experimental research on MICP has shown its promise as a bioremediation technique for mining waste. Additional research is required to evaluate the long-term feasibility and potential by-products of MICP-treated/stabilized waste.

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Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

See 1 more Smart Citation

Microbially Induced Calcium Carbonate Precipitation as a Bioremediation Technique for Mining Waste

Wilcox,

Mulligan,

Neculita

2024

Toxics

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“…These are, therefore, very similar stabilization mechanisms but, at the same time, of different implementation impact. In fact, while the MICP treatment consists of stimulating the growth of indigenous bacteria in situ (biostimulation) or increasing the ureolytic bacterial culture (bioaugmentation) [75,76], the RH-lime biocomposite is nothing more than a simple mixture of rice husk and aerial lime. Furthermore, carbonation strongly depends on the long-term stability of bacterial urease in the MICP [75,77], while it occurs spontaneously and without the need for special precautions in the RH-lime biocomposite.…”

Section: Feasibility Assessmentsmentioning

confidence: 99%

Mechanical Properties of a 3D-Printed Wall Segment Made with an Earthen Mixture

Ferretti

Moretti²,

Chiusoli³

et al. 2022

Materials

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This study provides a contribution to the research field of 3D-printed earthen buildings, focusing, for the first time, on the load-bearing capacity of these structures. The study involves the entire production and testing process of the earthen elements, from the design, to the preparation of the mixture and the 3D printing, up to the uniaxial compression test on a wall segment. The results indicate that 3D-printed earthen elements have a compressive strength of 2.32 MPa, comparable to that of rammed earth structures. The experimental data also made it possible to draw conclusions on the action of the infill, which seems to have the function of stopping the propagation of cracks. This has a positive effect on the overall behavior of 3D-printed earthen elements, since it avoids the onset of dilative behavior in the final stages of the load test and maintains ultimate load values higher than 50% of the maximum load.

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“…Nowadays, MICP has been broadly employed in engineering, such as sand consolidation, soil stabilization, heavy metal passivation, crack healing in cement-based materials, CO 2 sequestration, erosion mitigation, and dust suppression (Achal et al 2012b;Phillips et al 2016;Cuaxinque-Flores et al 2020;Fang et al 2021). However, the practical application of MICP for agricultural soil remediation is very limited because it may make soil coagulation, enhance mineral crystallization, increase soil strength, and reduce porosity and permeability (Jiang et al 2019;Chung et al 2020;Cuaxinque-Flores et al 2020;Proudfoot et al 2022), which may affect the soil properties, and tend to be disruptive to soil functions, thus not conducive to soil cultivation. Besides, contaminated soil usually suppresses microorganism growth because of the nutritional deficiency and high toxicity of pollutants (Ma et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Biochar-bacteria partnership based on microbially induced calcite precipitation improves Cd immobilization and soil function

Zhang

et al. 2023

Biochar

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Microbially induced calcite precipitation (MICP) technique utilizes ureolytic bacteria to decompose urea and generate carbonate ions for metal combination. MICP can remediate heavy metal (e.g., Cd) contaminated soils while maintaining or even improving soil functions, but its efficiency in agricultural soil practical application still needs to be enhanced. Here, we constructed a biochar-bacteria (2B) partnership in which biochar provides high nutrition and diverse sorption sites. Using the 2B system, Cd immobilization effectiveness and the underlying mechanism were examined along with the soil properties and soil functions. Results showed that compared to the single biochar and ureolytic bacteria systems, soil Cd mobility was reduced by 23.6% and 45.8% through co-precipitating with CaCO3 as otavite (CdCO3) in the 2B system, whereas soil fertility, bacterial diversity, and richness increased by 11.7–90.2%, 5.4–16.1%, and 6.8–54.7%, respectively. Moreover, the abundances of Proteobacteria and Firmicutes were enhanced in the 2B system. Notably, Sporosarcina and Bacillus (Firmicutes genus) that carry the ureC gene were boosted in the system, further implicating the microbiological mechanism in reducing Cd migration and its bioavailability in soil. Overall, the constructed 2B system was efficient in soil Cd immobilization by strengthening the ureolytic bacteria growth and their nutrient supply in the bacteria-rich soil ecosystem.

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Investigating the potential for microbially induced carbonate precipitation to treat mine waste

Cited by 27 publications

References 49 publications

Microbially Induced Calcium Carbonate Precipitation as a Bioremediation Technique for Mining Waste

Microbially Induced Calcium Carbonate Precipitation as a Bioremediation Technique for Mining Waste

Mechanical Properties of a 3D-Printed Wall Segment Made with an Earthen Mixture

Biochar-bacteria partnership based on microbially induced calcite precipitation improves Cd immobilization and soil function

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