Source Of Calcium Research Articles

Experimental Study on Macro and Meso Characteristics of Steel-Slag-Based Cemented Backfill Due to Microbial Mineralization Action.

Steel slag is an industrial solid waste, which can provide a new calcium source for microbial mineralization as it contains abundant calcium elements. This study treated cemented backfill material with microorganisms and steel slag to enhance its performance. The influence of microbial treatment on the strength, microstructure, and pore characteristics of the backfill was assessed using a strength test, nuclear magnetic resonance, scanning electron microscopy, and X-ray diffraction. The results indicate that (1) the microbial mineralization and the hydration reaction take place at the same time; (2) when the proportion of bacterial solution exceeded 50%, microorganisms excessively consumed Ca2+, which hindered the following hydration reaction; (3) the additional amount of bacterial solution added into the steel-slag-based cemented backfill material should be less than 50%, which increases the strength by up to 22.10%; (4) the excessive bacterial solution sharply reduces the strength of the backfill even by 21.41%; and (5) the addition of bacterial solution affects the pore characteristics. A 50% bacterial solution can make backfill reach its lowest porosity. The strength has an inversely proportional relationship with porosity, diameter, and roundness (σ = ax + b, a < 0).

Characterization of Soybean Extract Drinks Using Ambon Banana Peel Waste as a Source of Calcium

Characterization of Soybean Extract Drinks Using Ambon Banana Peel Waste as a Source of Calcium

Exploring calcite Coprecipitation: Synthesis, Crystal Growth, and pH effect

In this study, the synthesis and crystal growth of calcite (CaCO3) was examined with a focus on the coprecipitation and hydrothermal methods; additionally, crystal nucleation and growth was monitored under acidic and alkaline conditions. In the experiments, different Ca2+ solutions (pH 1.4 and 8.1) were mixed with Na2CO3 (pH 11.6), and the rates for the addition of the reactants were adjusted. Using an acidic Ca2+ solution as the calcium source and the rapid addition of carbonate, larger crystals were precipitated and grown in a single-step coprecipitation process. The fast addition of carbonate in an initially alkaline calcium solution produced intermediate crystal sizes. However, the slow dropwise addition of carbonate led to smaller crystals due to localized supersaturation and rapid nucleation. Coprecipitation followed by hydrothermal treatment produced larger crystals with the best-defined morphology. Structural and compositional analyses were conducted using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed the formation of calcite with different crystal sizes and provided insight into the controlled synthesis of CaCO3 crystals; our study has relevance for various industrial applications and for the investigation of natural sources.

Gluten-containing flours and gluten-free flours as a source of calcium, magnesium, iron and zinc

Wheat flour is widely used in Poland for the preparation of bread, pasta and other foods. Due to the increasing number of people diagnosed with diet-related diseases, consumer awareness of health-promoting issues and interest in gluten-free products (GFP). There is a dynamic development of the market for these foods with high quality and nutritional value and minerals that benefit human health and prevent deficiencies in patients on a gluten-free diet. The aim of this study was to determine the content of minerals: Ca, Fe, Mg and Zn in flours using the ICP-OES method. The mineral composition of selected GF flours available on the Polish market was analysed. It was tested how they supplement the mineral requirements compared to gluten-containing flours. It was found that these products can be a valuable source of essential minerals, which are often in short supply, especially in patients with gastrointestinal disorders. As our study has shown, flours from the GFP group are a good source of essential minerals, especially in the case of chia and flax flours, as well as buckwheat, amaranth, quinoa, lupin or almonds flours.

Effect of extraction method on the calcium binding capacity of faba bean globulin fractions at various pH

Faba bean ingredients are rich in proteins and good sources of calcium (Ca), although containing phytic acid (PA) molecules. PA, a polyphosphate compound, can affect the bioavailability of minerals/proteins through complex formation. This study evaluates the impact of two extraction processes, Alkaline Extraction-IsoElectric Precipitation (AE-IEP) and Sequential Extraction (SE), on the ability of faba bean globulin systems to bind added calcium ions. Increasing concentrations of CaCl2 were introduced into 2.5% (w/v) protein dispersions at pHs 4.5, 5.5, 6.5, and 7.5, and free Ca monitored. Near the isoelectric point of globulin (pH ∼ 4–5), Ca binding capacity was found to be low. At higher pHs, significant Ca chelation occurred, initially attributed to free PA binding sites, resulting in the formation of insoluble complexes and subsequent protein precipitation. The AE-IEP globulin fraction exhibited a higher Ca binding capacity than the SE globulin, attributed to its higher PA and lower initial Ca concentrations.

Bioactive Calcium Hydride-Driving "Triple" Hydrogen/Alkaline/Calcium Therapy for Efficient Treatment of Osteomyelitis.

Osteomyelitis with high mortality and disability rates is a common clinical disease caused by a bacterial infection that is difficult to cure. Considering the stubborn nature and depth of tissue infection, rapid and effective treatments for osteomyelitis remain an enormous challenge. Calcium hydride (CaH2), as efficient hydrogen/alkaline/calcium donors, is employed for combined osteomyelitis therapy. CaH2 reacts with water to sufficiently generate a strong alkali environment with hydroxide anions (OH-) to inhibit bacterial proliferation and induce bacterial death. The released calcium ions (Ca2+) induce calcium overload to kill bacteria first and then serves as calcium source to promote new bone formation. Another byproduct, hydrogen enhances the bacterial membrane permeability and scavenges excess reactive oxygen species (ROS). After incubation with bacteria, CaH2 significantly increases the permeability of the bacterial membrane, therefore increasing the entry of OH- and Ca2+ into bacterial cells, thereby leading to significant bacterial death. After being applied to S. aureus-infected mouse tibia osteomyelitis, CaH2 materials efficiently kill bacteria, relieve local inflammation, and promote new bone formation in a short time. Overall, bioactive metal hydride-associated "triple" hydrogen/alkaline/calcium therapy provides a new idea for the treatment of deep-site bacterial infection, which is beneficial for relieving the pressure caused by antibiotic-resistant bacteria.

A new strategy to produce calcium carbide-acetylene from integrated multi-level low carbon construction driven by biomass

A highly efficient and clean biomass energy-based calcium carbide-acetylene production system, including low-carbon energy supply, solid waste recycling and cascade utilization of waste heat, has been developed for the conventional energy-intensive and highly polluting fossil fuel-dependent calcium carbide industry. This system supplies the carbide-acetylene production plant with energy from the gasification of biomass and converts the plant's solid waste carbide slag into the calcium feedstock required by the plant. The waste heat from the plant's high-temperature exhaust gases is recycled and used via the multi-stage heat exchange, so that the energy cascade conversion and utilization is achieved. A simulation model of the plant is created in Aspen Plus, and a mathematical model for the biomass gasification process and cycle compensation of the calcium source through the Fortran language is written and embedded. When calculating the carbon consumption and CO2e emissions of the system, it was found that the carbon consumption and CO2e emissions of the conventional process were 5.43 t Coal·t−1C2H2 and 2.25 t CO2e·t−1C2H2, respectively. However, the carbon consumption of the new process was reduced by 65.19%, and carbon emissions by 27.24% in comparison. The energy analysis shows that the energy efficiency of the system is 36.21% for the conventional process and 44.82% for the new processes. The exergy analysis of the effective energy shows that the exergy efficiency of the new process is 73.20%, which is 52.98% better than that of the conventional process. Introduction of an index, the levelized income of acetylene product (LIOA), to characterize the product income of the system. When the price of acetylene is between 2.23 $/kg and 4.19 $/kg, the LIOA for the conventional and the new processes are 1.41 $/kg to 3.38 $/kg and − 1.28 $/kg to 0.68 $/kg, respectively. It is worth noting that the critical price (PCC2H2) for products generating net revenue from the new process is 3.17 $/kg. This study is of great importance for the development of a low-carbon biomass-coupled calcium carbide-acetylene process.

Simulation of calcium carbonate nucleation processes in confined C-S-H nanopores with different calcium-silicon ratios

Carbonation curing technology plays an important role in carbon cycling and improving the properties of cement-based materials, while the nucleation and growth mechanism of calcium carbonate (CaCO3) is still unclear. Based on molecular dynamics simulation, the formation process and nucleation mechanism of CaCO3 in confined C-S-H nanopores with different calcium-silicon ratios were studied. The results show that the clustering behavior of CaCO3 in C-S-H nanopores filled with saturated CaCO3 solution can be divided into three phases, rapid agglomeration stage, slow cluster stage, and stable cluster stage. The aggregation is mainly dependent on ionic bonding for nucleation growth and is consistent with the prenucleation mechanism. The Ca/Si ratio of C-S-H has a direct influence on the clustering of CaCO3. The anchoring mechanism of CaCO3 clusters is determined by ionic bonds and hydrogen bonds, and large clusters are preferentially adsorbed at the C-S-H interface through ionic bonds. The Ca/Si ratio of 1.5 can provide more nucleation sites by ionic bonds and hydrogen bonds for the formation of CaCO3, which is more conducive to the growth of clusters. And the calcium source from C-S-H in cluster bodies can be as high as 33 %. This study helps to understand the early formation process of CaCO3 in cement-based materials and lays a theoretical foundation for the development of carbonization curing technology.

A bioactive composite sponge based on biomimetic collagen fibril and oxidized alginate for noncompressible hemorrhage and wound healing

The study focuses on developing a bioactive shape memory sponge to address the urgent demand for short-term rapid hemostasis and long-term wound healing in noncompressible hemorrhage cases. A composite sponge was created by spontaneously generating pores and double cross-linking under mild conditions using biomimetic collagen fibril (BCF) and oxidized alginate (OA) as natural backbone, combined with an inert calcium source (Ca) from CaCO3-GDL slow gelation mechanism. The optimized BCF/OACa (5/5) sponge efficiently absorbed blood after compression and recovered to its original state within 11.2 ± 1.3 s, achieving physical hemostatic mechanism. The composite sponge accelerated physiological coagulation by promoting platelet adhesion and activation through BCF, as well as enhancing endogenous and exogenous hemostatic pathways by Ca2+. Compared to commercial PVA expanding hemostatic sponge, the composite sponge reduced bleeding volume and shortened hemostasis time in rat liver injury pick and perforation wound models. Additionally, it stimulated fibroblast migration and differentiation, thus promoting wound healing. It is biodegradable with low inflammatory response and promotes granulation tissue regeneration. In conclusion, this biocomposite sponge provides multiple hemostatic pathways and biochemical support for wound healing, is biologically safe and easy to fabricate, process and use, with significant potential for clinical translation and application.

Phenolic profile, fatty acid and mineral composition with antioxidant, antibacterial, and enzyme inhibitor activities of different extracts from Erodium Cicutarium (L.) L’Hér. consumed as a vegetable in Kilis, Turkey

This study aimed to explore the antioxidant activities, phenolic profile, fatty acid and mineral composition of the different extracts of Erodium cicutarium (L.) L’Hér. consumed as a vegetable in Kilis, Turkey. While catechine hydrate was the most abundant phenolic compounds in methanol, ethanol and diethyl ether extracts, it was chlorogenic acid in the water extract. Looking at the fatty acid profile, the amount of palmitic acid, one of the saturated fatty acids, was found to be high (34.30%), followed by stearic acid (5.10%). Total monounsaturated fatty acids are the second highest fatty acids. Total polyunsaturated fatty acids were determined as the third rank fatty acids. While the amount of linoleic acid, one of the total polyunsaturated fatty acids, was determined as 17.62%, the ratio of linolenic acid was determined as 9.60%. While the most calcium, magnesium and potassium were found among the 9 different mineral substances determined, respectively; the lowest element was found to be nitrogen. Looking at the results, it was determined that the plant is a high source of calcium (1078.503 mg/kg). Inhibitory effects against Pseudomonas aeruginosa ATCC 9027 were observed, with a zone diameter of 5.5 mm and 11 mm in methanol extract and diethyl ether extract, respectively. Ethanol and water extracts of E. cicutarium (L.) L.‘Hér. may be preferred as an alternative natural agent due to their amylase and tyrosinase activities. The results suggested that the E. cicutarium (L.) L.‘Hér. extracts may be useful for food and medicinal applications.

Feasibility Study of Applying Enzyme-Induced Carbonate Precipitation (EICP) without Calcium Source for Remediation of Lead-Contaminated Loess

Feasibility Study of Applying Enzyme-Induced Carbonate Precipitation (EICP) without Calcium Source for Remediation of Lead-Contaminated Loess

Fish Bones as Calcium Source: Bioavailability of Micro and Nano Particles.

The amount of by-products/waste in the fish industry is roughly 50%. Fish bones could be used to produce nanoparticles, which may have potential use in the food industry as a novel calcium source and at the same time, contribute to reduce waste production. The objective of this study was to evaluate the bioavailability of nano-size salmon fish bone particles compared to micro-size salmon fish bone particles, and calcium carbonate. The study was carried out in 21-28-day-old C57BL/6 male mice fed for 21 days with the experimental diets. The groups were as follows: CaCO3 0.5% Ca (CN 0.5); CaCO3 1.0% Ca (CN 1.0); salmon fish bone (SFB) microparticles 0.5% Ca (MP 0.5); SFB microparticles 1.0% Ca (MP 1.0); SFB nanoparticles 0.5% Ca (NP 0.5); and SFB nanoparticles 1.0% Ca (NP 1.0). Calcium bioavailability, defined as the percent calcium in femur showed an increasing trend from CN 0.5 to NP 1.0 group. According to ANCOVA, the greatest Ca content was observed in the NP 1.0 group compared with all groups but NP 0.5. In conclusion, in a murine model, salmon fish bone nanoparticles present higher calcium bioavailability than salmon fish bone microparticles, and both, in turn, have better bioavailability than calcium carbonate.

Effect of using different levels of egg shell as calcium sources in broiler diet on growth performance, blood parameters, and bone characteristics

The study was conducted at Grdarasha field in Salahaddin University –Erbil during the period from 23 November 2021 to 5 January 2022, to determine the effect of using different calcium sources in a broiler diet on growth performance, blood parameters, bone characteristics, and immunity organs. Three hundred (300) chicks have randomly distributed into three (3) treatments following a completely randomized design (CRD). Five replications for each treatment, each replicate contains 20 birds. The dietary treatments include T1: control (0% eggshell), T2 and T3 increasing levels of eggshell powder as a replacement to limestone at 50% and 100%, respectively. The results showed no significant (P&gt; 0.05) differences in broiler live body weight, body weight gain (BWQ), feed intake, feed conversation ratio, and mortality % among different weeks of experiments and different treatments used. The results of blood parameters did not note any significant variations among different treatment groups (P &gt; 0.05) in TG, HDL, LDL and P, however, the significant differences (P &lt; 0.01)was found in the Cholesterol, VLDL, and Calcium . Bone ash mainly consists of calcium and phosphorous, and their level of them differ significantly (P &lt; 0.01) among the different treatments. Also, the results of the effect of dietary treatments on the broilers' bone properties indicated that no significant differences in bone length (cm), diaphysis diameter (mm), Lateral wall thickness (mm), Medial wall thickness (mm), Medullary canal diameter (mm), Tibiotarsal index. However, the significance was found in bone weight and bone-breaking strength which is considered to affect bone fractures in poultry. Nevertheless, the results showed no significant differences in immunity organs, including spleen % and bursa %.

The use of organic calcium derived from eggshell waste on physiological and intestinal conditions of broiler chickens

The study aimed to investigate the effect of using eggshell waste or eggshell extract as organic calcium source in feed on the physiological conditions and intestines of broilers. A total of 392 one-day-old chicks were randomly distributed into four groups (10 birds each group), CONT (control diet con taining 1% limestone as an inorganic calcium source), EGFL (feed containing 1% eggshell powder as an organic calcium source), EEG1 (feed containing 1% eggshell extracted with Averrhoa bilimbi L. fruit filtrate as an organic calcium source), and EEG05 (feed containing 0.5% eggshell extracted using A. bilimbi L. fruit filtrate). Body weight and feed intake were recorded weekly, whereas blood, intesti nal content, and small intestinal segments were collected at day 35. Our results showed that during days 8-35, weight gain and feed consumption were lower (P&lt;0.05) in EEG05 than in CONT and EGFL. Thymus relative weight tended (P=0.08) to be lower in EEG05 than in CONT, and gizzard was lower (P&lt;0.05) in EGFL than in CONT and EEG05. Serum total triglyceride was significantly higher in CONT than in other groups. Moreover, serum high-density lipoprotein was higher in EEG1 and EE G05 than in CONT (P&lt;0.05). furthermore, serum albumin were higher (P&lt;0.05) in EEG1 than in CONT, EGFL and EEG05. Additionally, serum uric acid was higher (P&lt;0.05) in EEG1 than in EGFL and EEG05. Among the groups, SGPT levels were lowest (P&lt;0.05) in EEG05 birds. While there was no effect (P&gt;0.05) of treatments on coliform and lactic acid bacteria in the ileum and caecum, jejunal crypt depth tended (P=0.09) to be lower in EEG1 and EEG05 than in CONT and EGFL broilers. Con clusively, using 1% eggshell powder or eggshell extract in feed as the substitute for limestone had no detrimental effect on broiler chickens’ growth, physiological status and intestinal condition. Hence, eggshell powder or eggshell extracted with A. bilimbi L. fruit filtrate can be used as an organic calcium source to replace limestone.

New insights into dairy management and the prevention and treatment of osteoporosis: The shift from single nutrient to dairy matrix effects-A review.

Dairy is recognized as a good source of calcium, which is important for preventing osteoporosis. However, the relationship between milk and bone health is more complex than just calcium supplementation. It is unwise to focus solely on observing the effects of a single nutrient. Lactose, proteins, and vitamins in milk, as well as fatty acids, oligosaccharides, and exosomes, all work together with calcium to enhance its bioavailability and utilization efficiency through various mechanisms. We evaluate the roles of dairy nutrients and active ingredients in maintaining bone homeostasis from the perspective of the dairy matrix effects. Special attention is given to threshold effects, synergistic effects, and associations with the gut-bone axis. We also summarize the associations between probiotic/prebiotic milk, low-fat/high-fat milk, lactose-free milk, and fortified milk with a reduced risk of osteoporosis and discuss the potential benefits and controversies of these dairy products. Moreover, we examine the role of dairy products in increasing peak bone mass during adolescence and reducing bone loss in old age. It provides a theoretical reference for the use of dairy products in the accurate prevention and management of osteoporosis and related chronic diseases and offers personalized dietary recommendations for bone health in different populations.

Effect of recycled fine powder as a calcium source on fresh and hardened properties of geopolymer mortar

This study explores the efficacy of Recycled Fine Powder (RFP) derived from construction and demolition waste as a sustainable substitute for Ordinary Portland Cement (OPC) as a Calcium (Ca) source in geopolymer mortar. Fresh properties of Geopolymer Mortar (GPM) were evaluated in terms of slump-flow, initial-final setting time, whereas hardened properties were evaluated in terms of Compressive Strength (CS), Water Absorption (WA), porosity, acid attack, and dry shrinkage at both ambient and heat curing. Results indicate that the RFP performs well in all mixes. However, mix C10R10 shows the overall best results, as 17% higher compressive strength was observed as compared to mix C20R0, which further increases to 88% when compared to mix C0R0. Thus, RFP provides sufficient Ca content as an activator in GPM.

Recovery of terbium by Lysinibacillus sp. DW018 isolated from ionic rare earth tailings based on microbial induced calcium carbonate precipitation.

Microbial induced calcium carbonate precipitation (MICP) is considered as an environmentally friendly microbial-based technique to remove heavy metals. However, its application in removal and recovery of rare earth from wastewaters remains limited and the process is still less understood. In this study, a urease-producing bacterial strain DW018 was isolated from the ionic rare earth tailings and identified as Lysinibacillus based on 16S rRNA gene sequencing. Its ability and possible mechanism to recover terbium was investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and fourier transform infrared spectroscopy (FTIR). The results showed that the urease activity of DW018 could meet the biomineralization requirements for the recovery of Tb3+ from wastewaters. The recovery rate was as high as 98.28% after 10 min of treatment. The optimal conditions for mineralization and recovery were determined as a bacterial concentration of OD600 = 1.0, a temperature range of 35 to 40°C, and a urea concentration of 0.5%. Notably, irrespective of CaCO3 precipitation, the strain DW018 was able to utilize MICP to promote the attachment of Tb3+ to its cell surface. Initially, Tb3+ existed in amorphous form on the bacterial surface; however, upon the addition of a calcium source, Tb3+ was encapsulated in calcite with the growth of CaCO3 at the late stage of the MICP. The recovery effect of the strain DW018 was related to the amino, hydroxyl, carboxyl, and phosphate groups on the cell surface. Overall, the MICP system is promising for the green and efficient recovery of rare earth ions from wastewaters.

Synthesis of microalgae-based methyl ester using calcium glyceroxide catalyst derived from duck eggshells and crude glycerol in the n-hexane co-solvent system

Abstract The synthesis of microalgae-based methyl ester has attracted the interest of researchers since microalgae have a high lipid content and can proliferate. Chlorella vulgaris, with its 63% lipid content on a dry basis, holds promise for methyl ester production. Heterogeneous catalysts, particularly calcium glyceroxide (Ca[O(OH)2C3H5]), play a crucial role in ester manufacturing due to their high catalytic activity. The synthesis of the calcium glyceroxide catalyst involves duck eggshells as a calcium source and crude glycerol. Optimal methyl ester production is achieved by employing n-hexane as a co-solvent for efficient microalgae oil dissolution. This research focuses on synthesizing and characterizing the calcium glyceroxide catalyst derived from duck eggshells and crude glycerol, emphasizing its application in manufacturing microalgae-based methyl esters with n-hexane as the co-solvent. Methyl ester synthesis variables include a 55°C reaction temperature, a 1.5% microalgae-derived catalyst, and a 9:1 methanol to microalgae ratio. FTIR functional group analysis identifies hydroxyl (O-H) groups from crude glycerol bound to calcium at 3345.71 cm−1, along with C-H group vibrations from crude glycerol bound to calcium at 2941.80 cm−1. SEM morphological analysis reveals aggregate formation on the calcium glyceroxide catalyst, indicating potential active sites. Utilizing the calcium glyceroxide catalyst for methyl ester synthesis yields a promising 62.42% yield. GC characterization demonstrates a methyl ester purity of 72.09%, with methyl palmitate as the predominant component at 30.927%. This study underscores the efficient use of the synthesized calcium glyceroxide catalyst for microalgae-based methyl ester production, showcasing its potential for sustainable biodiesel synthesis.

The complexation color development—visible spectrophotometry method for rapid determination of Ca2+ concentration in mine wastewater and its mechanism

Ca2+ is an important cation in coagulants used in the treatment of mine wastewater such as coal slime water, and its concentration directly affects the settling and flotation of coal slime water. The rapid determination of Ca2+ concentration is of great significance to guiding industrial production. Herein, the complexation color development—visible spectrophotometry (CCDVS) method was proposed to obtain the concentration information of Ca2+, wherein 1-(1-Hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid (Calmagite) was used as an indicator and the mechanism of complexation between the indicator and Ca2+ was explored. The strong correlation between spectral data and Ca2+ concentration (R2 = 0.997) indicated that this method could be used for Ca2+ detection, thereby a quantitative model was proposed to predict Ca2+ concentration by using the complexation color development—visible light absorption data. The chemical element and bonding analysis confirmed that Ca2+ was complexed with the sulfonic acid group on the indicator skeleton in the form of Ca(OH)+ intermediate in an alkaline environment. The generated complexation product (-S-O-Ca(OH)+) could stably absorb 620 nm light energy, and its absorption performance remained 99.8% after standing for 60 min. The relative standard deviation of the detection results of Ca2+ in different calcium source solutions was as low as 1.24%, which confirmed the strong calcium source compatibility of the proposed method. More importantly, the successful application of this method in the determination of Ca2+ concentration at different points in industrial coal slime water system proved its advantages of high accuracy (relative error is as low as 5.01%), low cost and simple operation. The LOD of this method is 0.038 mg/L. Therefore, the complexation color development—visible spectrophotometry method can maximize the potential for cost reduction and efficiency improvement in mine wastewater treatment.

Application of microbially induced calcium carbonate precipitation (MICP) process in concrete self-healing and environmental restoration to facilitate carbon neutrality: a critical review.

Soil contamination, land desertification and concrete cracking can have significant adverse impacts on sustainable human economic and societal development. Cost-effective and environmentally friendly approaches are recommended to resolve these issues. Microbially induced carbonate precipitation (MICP) is an innovative, attractive and cost-effective in situ biotechnology with high potential for remediation of polluted or desertified soils/lands and cracked concrete and has attracted widespread attention in recent years. Accordingly, the principles of MICP technology and its applications in the remediation of heavy metal-contaminated and desertified soils and self-healing of concrete were reviewed in this study. The production of carbonate mineral precipitates during the MICP process can effectively reduce the mobility of heavy metals in soils, improve the cohesion of dispersed sands and realize self-healing of cracks in concrete. Moreover, CO2 can be fixed during MICP, which can facilitate carbon neutrality and contribute to global warming mitigation. Overall, MICP technology exhibits great promise in environmental restoration and construction engineering applications, despite some challenges remaining in its large-scale implementation, such as the substantial impacts of fluctuating environmental factors on microbial activity and MICP efficacy. Several methods, such as the use of natural materials or wastes as nutrient and calcium sources and isolation of bacterial strains with strong resistance to harsh environmental conditions, are employed to improve the remediation performance of MICP. However, more studies on the efficiency enhancement, mechanism exploration and field-scale applications of MICP are needed.