Microbial induced carbonate precipitation for remediation of heavy metals, ions and radioactive elements: A comprehensive exploration of prospective applications in water and soil treatment

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 271, С. 115990 - 115990

Опубликована: Янв. 22, 2024

Improper disposal practices have caused environmental disruptions, possessing by heavy metal ions and radioactive elements in water soil, where the innovative sustainable remediation strategies are significantly imperative last few decades. Microbially induced carbonate precipitation (MICP) has emerged as a pioneering technology for remediating contaminated soil water. Generally, MICP employs urease-producing microorganisms to decompose urea (NH2CONH2) into ammonium (NH4+and carbon dioxide (CO2), thereby increasing pH levels inducing (CO32−), effectively removing remove contaminants. Nonetheless, intricate mechanism underlying mineralization poses significant challenge, constraining its application contaminants engineering, particularly context of prolonged leaching over time efficacy adverse conditions. This review provides comprehensive idea recent development examining metabolic pathways, mineral mechanisms, factors well providing future perspectives commercial utilization. The use ureolytic bacteria demonstrates cost-efficiency, compatibility, successful pollutant abatement tradition bioremediation techniques, bio-synthesis nanoparticles. limitations such large-scale application, elevated Ca2+levels groundwater, gradual contaminant release need be overcome. possible research directions technology, emphasizing potential conventional remediation, CO2 sequestration, bio-material synthesis, role reducing impact long-term economic benefits.

Язык: Английский

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Deterioration phenomenon of Pb-contaminated aqueous solution remediation and enhancement mechanism of nano-hydroxyapatite-assisted biomineralization

Journal of Hazardous Materials, Год журнала: 2024, Номер 470, С. 134210 - 134210

Опубликована: Апрель 4, 2024

Язык: Английский

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Struvite and ethylenediaminedisuccinic acid (EDDS) enhance electrokinetic-biological permeable reactive barrier removal of copper and lead from contaminated loess

Journal of Environmental Management, Год журнала: 2024, Номер 360, С. 121100 - 121100

Опубликована: Май 13, 2024

Язык: Английский

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Effects of enzyme-induced carbonate precipitation technique on multiple heavy metals immobilization and unconfined compressive strength improvement of contaminated sand

The Science of The Total Environment, Год журнала: 2024, Номер 947, С. 174409 - 174409

Опубликована: Июль 1, 2024

Язык: Английский

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Draft genome analysis for Enterobacter kobei, a promising lead bioremediation bacterium

Frontiers in Bioengineering and Biotechnology, Год журнала: 2024, Номер 11

Опубликована: Янв. 8, 2024

Lead pollution of the environment poses a major global threat to ecosystem. Bacterial bioremediation offers promising alternative traditional methods for removing these pollutants, that are often hindered by various limitations. Our research focused on isolating lead-resistant bacteria from industrial wastewater generated heavily lead-containing industries. Eight strains were successfully isolated, and subsequently identified through molecular analysis. Among these, Enterobacter kobei FACU6 emerged as particularly candidate, demonstrating an efficient lead removal rate 83.4% remarkable absorption capacity 571.9 mg/g dry weight. Furthermore, E. displayed maximum tolerance concentration (MTC) reaching 3,000 mg/L. To further investigate morphological changes in response exposure, scanning electron microscopy (SEM) transmission (TEM) employed. These analyses revealed significant adsorption intracellular accumulation treated contrast control bacterium. Whole-genome sequencing was performed gain deeper insights into E . kobei’s resistance mechanisms. Structural annotation genome size 4,856,454 bp, with G + C content 55.06%. The encodes 4,655 coding sequences (CDS), 75 tRNA genes, 4 rRNA genes. Notably, genes associated heavy metal their corresponding regulatory elements within genome. expression levels four specific evaluated. findings statistically upregulation gene under environmental conditions, including pH 7, temperature 30°C, high concentrations metals. outstanding potential source diverse related plant growth promotion makes it valuable candidate developing safe effective strategies disposal.

Язык: Английский

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Immobilizing lead in aqueous solution and loess soil using microbially induced carbonate/phosphate precipitation (MICP/MIPP) under harsh pH environments

Journal of Hazardous Materials, Год журнала: 2024, Номер 480, С. 135884 - 135884

Опубликована: Сен. 17, 2024

Язык: Английский

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Study on the mechanism and stability of microbially induced struvite precipitation (MISP) for enhanced immobilization of uranium

Journal of Cleaner Production, Год журнала: 2024, Номер 449, С. 141536 - 141536

Опубликована: Март 7, 2024

Язык: Английский

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An Enzyme-Induced Carbonate Precipitation Method for Zn2+, Ni2+, and Cr(VI) Remediation: An Experimental and Simulation Study

Applied Sciences, Год журнала: 2024, Номер 14(15), С. 6559 - 6559

Опубликована: Июль 26, 2024

Heavy metal contamination has long been a tough challenge. Recently, enzyme-induced carbonate precipitation (EICP) proposed to handle this problem. This paper aims explore the efficacy, process, and mechanisms of EICP using crude sword bean urease extracts remediate Zn2+, Ni2+, Cr(VI) contamination. A series liquid batch tests geochemical simulations, as well microscopic analyses, were conducted. The test results show that can be effectively immobilized by method, highest immobilization percentage was observed for reaching up 99%. Ni2+ at 62.4% 24.4%, respectively. Additionally, heavy metals increased with concentration added Ca2+. simulation XRD reveal organic molecules in promote ZnCO3, Zn(OH)2, Zn5(CO3)2(OH)6, NiCO3 precipitation. FTIR SEM-EDS provide evidence adsorption functional groups calcium carbonate. results, analysis indicate mechanism remediation summarized biomineralization form precipitates hydroxide precipitates, carbonate, or complexation promoting nucleation molecules.

Язык: Английский

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Biopolymer-assisted enzyme-induced carbonate precipitation for immobilizing Cu ions in aqueous solution and loess

Environmental Science and Pollution Research, Год журнала: 2023, Номер 30(54), С. 116134 - 116146

Опубликована: Ноя. 1, 2023

Язык: Английский

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Effects of bacterial consortium enhanced recycled coarse aggregates on self‐healing concrete immobilized with Bacillus megaterium MTCC 1684 and Bacillus subtilis NCIM 2193

Structural Concrete, Год журнала: 2023, Номер 25(3), С. 1840 - 1864

Опубликована: Дек. 29, 2023

Abstract The strength and durability properties of the recycled aggregate concrete (RAC) have been affected by cracks weak interfacial transition zone (ITZ) coarse aggregates (RCA). However, mechanical physical features RCA can be improved microbially induced calcite precipitation (MICP). Therefore, immobilization techniques were used to protect maintain high efficiency Bacillus bacteria for formation calcium carbonates in self‐healing over a period time. objective present study was show viability immobilized bacterial consortium‐enhanced form cracks. Further, capability enhanced investigated along with two other methods, that is, hydrated lime brick powder (HBr)‐immobilized bacteria. experimental results increase bio‐deposition time RCA. subsequently 56 days healing incubation period, specimens completely healed width 0.58 mm. equivalent 0.56 mm also recovered HBr cultures. Furthermore, field emission scanning electron microscope (FESEM), energy dispersive spectroscopy (EDS) X‐ray diffraction (XRD) analysis revealed existence at crack surface carbonate regular cubic‐shaped lamellar layer morphology. outcomes current has promising potential develop self‐repaired construction field.

Язык: Английский

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