Size Of CaCO3 Research Articles

Evaluation of calcium carbonate production and cementitious characteristics of enzymatically induced carbonate precipitation during environmental adjustment

Enzymatically induced carbonate precipitation (EICP) is an emerging and eco-friendly technology, which is considered a green alternative to traditional cement in soil stabilization. When stabilizing soil use one-phase grouting method, the activity of urease is often adjusted, leads to changes in the composition and cementitious characteristics of CaCO3. Previous studies primarily focused on the mechanical properties of solidified soil samples, while the production and cementitious characteristics of CaCO3 influenced by the control of urease activity is rarely discussed. This study investigated production and cementitious characteristics of CaCO3 under different reaction environment (pH adjustment, temperature adjustment, and addition of inhibitors), during which the urease activity tests, pH tests, CaCO3 production tests and ultrasonic oscillation tests are conducted. Meanwhile, the morphological characteristics and mineral composition of CaCO3 are revealed through Scanning Electron Microscope-Energy Dispersive Spectrometer (SEM-EDS) tests and X-ray Diffraction (XRD) test. The results demonstrate that all three one-phase grouting methods can delay the production of CaCO3 at early-stage of EICP, while the pH should be maintained above 4 to prevent significant urease deactivation. The CaCO3 generated in EICP mainly consists of calcite and vaterite, and the size of CaCO3 increases with the urease activity increased. The cementitious characteristics of CaCO3 is mainly determined by the percentage composition of calcite and vaterite, where higher vaterite content results in weaker cementitious characteristics. This study provides insights for evaluating the cementitious characteristics of CaCO3, which is beneficial for guiding the promotion and application of one-phase grouting method.

BSA regulated degradation performance and osteogenesis of CaCO3 coating on magnesium alloy for orthopedic applications

Rapid degradation of magnesium (Mg) alloys and slow osteogenesis surrounding implants greatly limit their clinical applications. In present study, influence of BSA on the characteristics of CaCO3 coating on MgZnCa alloy was investigated to adjust the degradation behaviors of Mg alloy and cell response to the coating. BSA can regulate the crystalline and the particle size of CaCO3 in the coating and deteriorate coating stability and thickness, thereby leading to a tunable corrosion resistance for CaCO3@BSA coatings. Moreover, the presence of BSA bestows more suitable composition, roughness and wettability on cells with a better osteogenic performance on the coating.

Effect of conditions on wet carbonation products of recycled cement paste powder

Wet carbonation is deemed a successful approach to recycling waste concrete powder. Controlling the growth and properties of products in the recycled cement paste powder (CPP) is highly dependent on the wet carbonation conditions. Therefore, this study aims to examine the effect of wet carbonation parameters on wet carbonation products in CPP. The wet carbonation of CPP resulted in mixed distribution of silica gel and CaCO3 without significant layering on the CaCO3. In contrast, silica gel covered the outside of the CaCO3 in the case of dry carbonation. Increasing the temperature from 25 °C to 80 °C promoted and accelerated the crystallization and growth of amorphous CaCO3, increased the crystallite size of CaCO3 by 1.1–5.1 nm, and favored the formation of aragonite and vaterite; however, it also led to a significant crystal defect and/or distortion within CaCO3. Higher temperatures also promoted silica gel formation and increased its polymerization degree by 68.2%. On the other hand, increasing the CO2 flow rate from 3 L/min to 5 L/min facilitated the crystallization and growth of CaCO3 and contributed to the increase in the crystallite size of CaCO3 by 3.0–6.6 nm. Higher CO2 flow led to the incorporation of aluminum into silica gel and resulted in the transformation of its gel pores into capillary pores. The findings of this study contribute to a better understanding of the best experimental parameters to achieve a more efficient and effective concrete waste recycling process.

Experimental study on the scale inhibition effect of the alternating electromagnetic field on CaCO3 fouling on the heat exchanger surface in different circulating cooling water conditions

Scaling on the heat exchanger surface resulted in large equipment cleaning, maintenance expenses and safety issues in the industrial production. To remove the heat exchanger scaling, research on the scale inhibition effect of the alternating electromagnetic field on CaCO3 fouling on the heat exchanger surface with the selected four Mg2+/Ca2+ molar ratios in circulating cooling water. Four indicators, namely, heat transfer resistance, scale inhibition rate, the growth rate of CaCO3, and conductivity were discussed extensively. The experimental results demonstrated that remarkable scale inhibition effect occurs, when the Mg2+/Ca2+ molar ratios is 0 and 1:1.2 with 46.80% and 39.28% of the scale inhibition rate, respectively. Compared with the control group, the heat transfer resistance was decreased, the adherent scale growth rate was slowed down, and the rising stage time was shortened in the experiment group. In addition, the decreased of conductivity in the experiment group indicated that the alternating electromagnetic field promoted the crystallization in the solution. XRD and SEM analysis demonstrated that the alternating electromagnetic field and Mg2+ could promote aragonite crystallization, reduce the polymerization degree, and decrease the crystal particle size of CaCO3. Affecting the crystallization process of adherent scale and promoting the homogeneous precipitation of non-adherent scale in solution is the key to the alternating electromagnetic field scale inhibition technology. This study could provide a guidance for the parameter selection in electromagnetic field scale inhibition technology of industry application.

Calcium carbonate from chicken eggshells as filler in composite Nafion membrane for direct ethanol fuel cell: a molecular dynamics study

AbstractBACKGROUNDDirect ethanol fuel cells (DEFC) need fillers to mitigate the issue of ethanol crossing over from the anode to the cathode, which lowers performance. Therefore, this study developed calcium carbonate (CaCO3) from chicken eggshells as a filler in a Nafion composite membrane for DEFC. Three cluster models of CaCO3 filler were developed, namely (CaCO3)2, (CaCO3)3, and (CaCO3)4, to form the Nafion composite membranes. The properties of composite membranes, such as proton conductivity, ethanol permeability, and selectivity, were studied using the molecular dynamics method. In addition, the three main factors influencing the composite membranes’ properties were analyzed in this study; these were cluster size of CaCO3, mass loading of the filler, and ethanol concentration.RESULTSThe results show that filler has reduced proton conductivity and ethanol permeability in the DEFC application compared to the Nafion membrane. However, the selectivity is used as a trade‐off between ion conductivity and ethanol permeability in the composite membrane, thus requiring a suitable size structure and mass loading to balance the high ion conductivity rate and reduce the ethanol permeability rate. The composite membrane C‐(CaCO3)4, which has a large cluster size in this study, shows that it is necessary to restrict ethanol permeability at a high ethanol concentration of 5 mol L−1. However, the structure size in cluster B – (CaCO3)3 – can reduce ethanol permeability but requires high mass loading by 5 wt%. Analysis of variance showed significant values for ion conductivity, ethanol permeability, and selectivity responses.CONCLUSIONCaCO3 successfully reduced ethanol crossover in DEFC, with all three composite membranes being suitable for use at low ethanol concentrations. However, specific size structure and mass loading are required to overcome ethanol crossover at high ethanol concentration. © 2023 Society of Chemical Industry (SCI).

Using sucrose to prepare submicrometric CaCO3 vaterite particles stable in natural rubber

Vaterite with submicrometer particles was successfully synthesized by adding sucrose at certain amounts (x = 0–50 %) to the aqueous solutions of ammonium carbonate ((NH4)2CO3) and calcium chloride (CaCl2) precursors prior to the precipitation. Typical polymorphic phases and morphological shapes of CaCO3 particles were characterized by XRD, FTIR, Raman spectroscopy, SEM, and TEM techniques. It is evident that when the sucrose concentration is increased, the average particle size of CaCO3 is decreased which was reduced from 0.81 µm at x = 0 % to 0.42 µm at x = 50 %. Simultaneously, the % quantitative of the vaterite phase was increased from 92.52 % at x = 0 % to 99.10 % at x = 50 %. In addition, the regular round shape of the vaterite particles was evidenced by SEM and TEM images. Generally, commercial CaCO3 which is a calcite polymorph with cubic form was used as an extender without reinforcing efficiency in rubber material. It is therefore challenging to incorporate the obtained round shape vaterite in natural rubber (NR) latex and it is interesting to find a stable vaterite CaCO3 polymorph in the NR, evidenced by XRD and FTIR results. The negative charges on the surface of NR particles were proposed to play an important role to stabilize the vaterite particles.

SYNTHESIS OF CALCIUM CARBONATE (CaCO3) FROM EGGSHELL BY CALCINATION METHOD

Calcium is an essential nutrient the human body needs to control blood pressure and maintain strong bones and teeth. One type of calcium that is often consumed and safe for health is calcium carbonate. It can obtain this material from chicken eggshell waste, where it is known that the CaCO3 content is 95%. Therefore, it conducted this research to see the phase, functional group, absorbance level, and energy band gap of CaCO3 samples. CaCO3 was synthesized using the calcination method, in which the egg shells were first soaked in sodium hypochlorite, then dried at 250°C for 10 minutes, and CaCO3 powder was obtained. Then the powder was characterized by XRD, FTIR, and UV-Vis. The results of XRD analysis showed that the calcite phase of CaCO3 was 100% according to the JCPDS PDF of calcite (96-901-6707) with a crystalline size of CaCO3 of 22.6 nm. The results of FTIR of CaCO3 samples at the absorption peak of 4000-500 cm-1 identified the functional groups of Ca-O, C-O, -CH2, and O-H. CaCO3 samples can absorb light at wavelengths of 237.1 nm, 251.5 nm, and 289.7 nm, which have an energy band gap of 3.91 eV. Thus, using this simple calcination method, the CaCO3 sample obtained from the extraction of chicken egg shells can later be applied in the medical field.

Insights into the interaction between typical amines and alkaline minerals for improved CO2 absorption and mineralization

AbstractAmine scrubbing is a mature technology to cut down CO2 emissions from human activities but suffers from a high energy consumption of solvent regeneration. The integrated CO2 absorption and mineralization (IAM) process can effectively reduce the energy consumption of amine regeneration by replacing traditional thermal regeneration with chemical regeneration via CO2 mineralization. However, a fundamental understanding of the interaction between typical amines and alkaline minerals was still lacking. In this paper, the effects of amine types on amine regeneration, alkaline metal leaching, and CaCO3 precipitation during the IAM process were explored by using five typical amines and Ca(OH)2/Mg(OH)2. Results showed very different regeneration kinetics and efficiencies were observed in five selected amine solutions, which displayed a decreased performance in the order TEA > MDEA > DEA > AMP > MEA. The regeneration performance was significantly affected by the dissolution of Ca(OH)2/Mg(OH)2 which was inversely proportional to the trend of their pKa values. TEA displayed the largest regeneration efficiency of about 95% by Ca(OH)2 and 83% by Mg(OH)2, which was much larger than other amines reported in the open literature, due to its lower pKa value than other selected amines. More interestingly, the particle size of CaCO3 produced from amine solutions was smaller than that from CaCl2 solution reported in the literature. There was a rough linear relationship between CaCO3 particle size and amine pKa values. TEA induced the formation of nano scaled CaCO3, which might be attributed to the adsorbing of TEA on the CaCO3 crystal and inhibiting the crystal growth. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

Influence of Nanoparticle CaCO3 Addition to the Physical and Mechanical Properties of Polypropylene-CaCO3 Composite

Influence of Nanopaticle CaCO3 Addition to the Physical and Mechanical Properties of Polypropylene-CaCO3 Composite. This research was carried out to study the effect of adding CaCO3 nanoparticle on the physical and mechanical properties of polypropylene-CaCO3 composites. It was characterized by several parameters such as tensile strength, hardness, and thermal analysis including both melting point and heat of fusion using Differential Scanning Calorimetry (DSC). Based on XRD results, the particle size of CaCO3 after 24 hours of milling was 39 nm. There are various compositions of polypropylene-CaCO3 composites (PP MF35: nano-CaCO3) made in this study, namely 40%:60%, 35%:65%, 30%:70%, and 25%:75%. The results showed that the tensile strength of the PP MF35-CaCO3 composites decreased with increasing nano-CaCO3 content. Meanwhile, the hardness of the nanocomposites increased with increasing nano-CaCO3 content, but decreased the melting point and heat of fusions (ΔHm) of the nanocomposites. The infrared spectrum showed that the interaction between PP MF35 and nano-CaCO3 was only physical interaction and there was no chemical reaction.

Use of Taguchi method for high energy ball milling of CaCO3

Taguchi’s method was applied to investigate the effect of main high energy ball milling (HEBM) parameters: milling time (MT), ball to powder weight ratio (BPWR), and milling speed (MS) on the CaCO3 crystallite size. The settings of HEBM parameters were determined by using the L9 (33) orthogonal experiments array (OA). The as-received and milled powders were characterized by X-ray diffraction (XRD) scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy. The crystallite size of CaCO3 varied between 140 and 540 nm depending on the HEBM conditions. The analysis of variance (ANOVA) was used to find the significance and percentage of contribution of each milling parameter. It was established that the MT is the most effective parameter followed by MS and BPWR. A confirmation test was carried out with a 90% confidence level to illustrate the effectiveness of the Taguchi optimization method. The optimum milling parameter combination was determined by using the analysis of signal-to-noise (S/N) ratio. Based on the S/N ratio analysis, optimal HEBM conditions were found MT 10 h, MS 600 revolutions per minute (rpm), BPWR 50:1.

Green and High Effective Scale Inhibitor Based on Ring-Opening Graft Modification of Polyaspartic Acid

Polyaspartic acid (PASP)-based green scale inhibitor has great potential application in water treatment. Here, we first synthesized PASP in ionic liquid. Then, an effective PASP-based green scale inhibitor was synthesized by ring-opening graft modification of PASP with both aspartic acid (ASP) and monoethanolamine (MEA). Its chemical composition was characterized by gel chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), and 1H nuclear magnetic resonance (1H NMR). Scale inhibition efficiency was measured by static scale inhibition tests. The results showed that the new PASP-based scale inhibitor has high scale inhibition to both CaCO3 and Ca3(PO4)2. When the concentration was increased to 2 mg/L, the inhibition efficiency of the new PASP-based scale inhibitor was 99% for CaCO3, while when the concentration was raised to only 4 mg/L, its inhibition efficiency increased to 100% for Ca3(PO4)2. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) were used to analyze the changes of crystal structure for CaCO3 and Ca3(PO4)2 after adding the new PASP-based scale inhibitor. The crystal size of CaCO3 and Ca3(PO4)2 became smaller and the crystal form became amorphous after adding the modified PASPs compared with adding pure PASP. Moreover, the modified PASP showed good biodegradation performance.

Desorption of carbon dioxide from monoethanolamine solution via calcium chloride addition under ultrasound irradiation and evaluation of the characteristics of generated calcium carbonate

We report the desorption of carbon dioxide [CO2(g)] from monoethanolamine (MEA) solution via the addition of calcium chloride (CaCl2) into a CO2-absorbed MEA solution (0.2 M, pH 8.2) under ultrasound treatment (28 kHz, 200 kHz) and stirring (1500 rpm). Ultrasound at 28 kHz had a higher CO2(g) desorption ratio than either ultrasound at 200 kHz or stirring after 1 min [9.2% (28 kHz), 6.2% (stirring), and 5.8% (200 kHz)]. Treatment with ultrasound at 28 kHz resulted in the highest Ca recovery ratio, 89.1%, at 1 min treatment time. The desorption of CO2(g) from the MEA solution using 28 kHz ultrasound started immediately after the initiation of CaCO3 formation. Furthermore, it was found that the average particle size of CaCO3 obtained by ultrasound treatment at 28 kHz and a treatment time of 1 min was 0.91 μm, with a narrow particle size distribution.

Surface modification of steel fibers using chemical solutions and their pullout behaviors from ultra-high-performance concrete

To improve the pullout resistance of conventional straight steel fiber from ultra-high-performance concrete (UHPC), its surface was modified using various chemical solutions. Calcium carbonate (CaCO3) particles were precipitated on the surfaces of the steel fiber in an aqueous solution. The morphology and particle size of CaCO3 were controlled by ethylenediaminetetraacetic acid (EDTA) and investigated via scanning electron microscopy; further, its chemical composition was verified through energy-dispersive X-ray spectroscopy. The test results indicate that longer duration of immersion in a solution of CaCl2 and Na2CO3 yield larger CaCO3 particles on the surface owing to Ostwald ripening. The addition of EDTA changes the morphology of the CaCO3 particle and decreases its grain size from 16.2 to 3.1 μm. In order to investigate the effects of the precipitated CaCO3 particles on the fiber pullout resistance, single fiber pullout test was carried out; the modified steel fibers were embedded in UHPC matrix. The CaCO3 particles precipitated on the fiber surface improved the pullout resistance of the steel fiber from the UHPC. The smaller CaCO3 particles were more effective for enhancing the pullout resistance. The average bond stress and pullout work were increased by up to 15% and 37%, respectively, owing to the precipitated CaCO3 particles. The EDTA solution could peel off the surface of steel fiber regularly and render it rough; thus, it greatly increased the pullout resistance (more than 80%) than the plain fiber.

Ultrafine calcium carbonate-filled natural rubber latex film: mechanical and post-processing properties

This study aims to improve the dispersion of treated calcium carbonate (CaCO3) in natural rubber latex (NRL) films. Ball mill and ultrasonic methods were used to break down the particle size of CaCO3, and the combined effect of ball mill/ultrasonic and ultrasonic/ball mill methods with their optimum processing times was applied to re-agglomerate and further break down the particle size of CaCO3. The particle size and dispersibility of treated CaCO3 were characterized by particle-size analysis, transmission electron microscopy (TEM), and Zeta-potential measurement. The particle-size analysis and TEM results revealed that the particle size of CaCO3 reduced down to 1.4 µm with less agglomeration using ultrasonic for 120 min and ball mill for 72 h. Zeta--potential measurement also indicated that the ultrafine-treated CaCO3 with a broad particle-size distribution was compatible with NRL particles. The treated CaCO3 loadings from 5 to 20 phr were filled in the NRL compounds. NRL/CaCO3compounds showed decrease in viscosity and cross-link density, but increase in swelling index. It was found that tensile strength, modulus at 100% elongation, elongation-at-break, swelling index, and cross-link density of the films were improved with addition of 10 phr of CaCO3. At 20 phr of filler loading, the increment rate of tensile strength of NRL/CaCO3 films was 44% after leaching, and their retention percentage was 62% after heat aging. Therefore, ultrafine CaCO3-incorporated NRL can withstand under accelerated heat-aging condition.

Effect of Graphene Oxide on the Crystallization of Calcium Carbonate by C3S Carbonation.

The effect of graphene oxide (GO) on the crystallization of calcium carbonate (CaCO3) is explored in this paper. Precipitation of CaCO3 was carried out by bubbling carbon dioxide (CO2) through tricalcium silicate (C3S) hydration solution with different graphene oxide admixture contents (0.2%, 1% and 2% mass ratios based on C3S). The polymorph, morphology, crystal size and particle size of CaCO3 were evaluated using X-ray diffraction (XRD), an environmental scanning electronic microscope (ESEM), and laser particle size analysis. The results showed that addition of GO was able to promote the conversion of CaCO3 to a calcite crystal phase with higher thermal stability and crystallinity than the control. However, as the dosage of GO increased, the growth of the calcite crystal particles was somewhat suppressed, resulting in a decrease in the crystal particle size and a narrow particle size distribution. When the amount of GO was 0.2%, 1% and 2%, the crystal size of the calcite was 5.49%, 12.38%, and 24.61% lower than that of the sample without GO, respectively, while the particle size of the calcite also decreased by 17.21%, 39.26%, 58.03%, respectively.

Alkali-treated starches as a new class of templates for CaCO3 spherulite formation: Experimental and theoretical studies

Biomineralization is the study of minerals produced by biomaterials or living organisms, and it has attracted considerable attention in industry and fundamental research. Here, for the first time, the roles of alkali-treated mung bean (MB) and cassava (CS) starches as templates for calcium carbonate (CaCO3) spherulite formation were investigated by bulk rheology and molecular dynamics (MD) simulations. The rheological results, including yield stress, flow behavior index, consistency coefficient, and hysteresis area of alkali-treated MB and CS starch suspensions containing Ca2+, revealed that the Ca2+ induced the folding of starch chains via Ca2+ crosslinking, leading to aggregation of starch–Ca2+ complexes. After the starch films were fabricated from the suspensions, CaCO3 spherulites were observed inside the films. The size and number of the spherulites increased with increasing concentration of Ca2+ in the suspensions as a result of an increase in nucleation sites needed for spherulite growth. Moreover, to gain a deeper understanding of the interactions between Ca2+ and starch and of the formation of the nucleation sites for spherulite growth, MD simulations were performed. Our findings pave the way for the design of new biomaterial-based templates, which can efficiently control crystal shape and size of CaCO3.

The Mn-promoted double-shelled CaCO3 hollow microspheres as high efficient CO2 adsorbents

Novel Mn-promoted double-shelled hollow CaCO3 microspheres were successfully synthesized by a versatile template method using carbon microspheres as sacrificial templates, achieving the controllable adjustment of Ca-Mn molar ratio, microsphere size and shell thickness. The Mn-promoted hollow CaCO3 microspheres with self-supported double shells effectively handled the collapsing problem led by the continuous volume variations, of which the adsorption performance notably outperformed that of the pure CaCO3 counterpart. The uniformly distributed Mn considerably enhanced structural stability of the double-shelled hollow microspheres and reduced the crystalline size of CaCO3. Furthermore, the existence of Mn promoted the ability of donating electrons of CaO to CO2 and was presumably to bring about oxygen vacancies. The sorbent Ca12Mn1-500 exhibited an initial CO2 adsorption capacity of 0.62 g-CO2/g-ads and a final one of 0.53 g-CO2/g-ads after 25 adsorption-desorption cycles.

Enhanced Vaterite And Aragonite Crystallization At Controlled Ethylene Glycol Concentrations

Calcium carbonate (CaCO3) has three distinct anhydrous polymorphs, namely vaterite, aragonite and calcite. Although there is a high demand for aragonite and vaterite polymorphs for biomedical use, their unstable nature makes it challenging to synthesize them compared to calcite, which is the most stable form of CaCO3. Despite the remarkable effort on stabilizing vaterite and aragonite polymorphs in aqueous solutions, phase-pure vaterite and aragonite polymorphs have not been synthesized yet, without referring to the use of additives, surfactants or elevated temperatures. Herein, the effect of ethylene glycol (EG) concentration and temperature on the formation of vaterite and aragonite particles were investigated at 25 °C and 70 °C. Results showed that 60% EG containing precursor solution -without any other additive- can prevent vaterite/aragonite-to-calcite transformation regardless of the synthesis temperature. Furthermore, the size of CaCO3 particles decreased as EG concentration increased and it reached its minimum average values at 80% EG. The results of this study revealed the potential use of the proposed synthesis route to stabilize vaterite and aragonite polymorphs, tailor their content, morphology and size without using any additives, surfactants and elevated temperatures.

Processing, dielectric and electrical characteristics of strontium-modified Ca1Cu3Ti4O12

In the present paper, the strontium (Sr)-modified Ca1Cu3Ti4O12 ceramic (further termed as CSCTO) has been fabricated by a conventional cost-effective ceramic route. The prepared sample is characterized to obtain the relationship between the structural and electrical properties in a wide frequency (103–106 Hz) and temperature (25–315 °C) ranges. X-ray diffraction spectra depict a single-phase formation of the compound, crystallized in the cubic system. The dielectric relaxation mechanism and electrical properties of CSCTO have been revealed by studying frequency and temperature dependence of dielectric parameters (er and tanδ) by dielectric and impedance spectroscopy. The temperature-dependant dielectric constant plots depict that at frequency 1 kHz, the compound has very high dielectric constant (order of 104) and relatively low tangent loss. The occurrence of ultra high dielectric constant of the compound may be due to the space charge polarization, interface and Maxwell–Wagner dielectric relaxation around low frequencies and high-temperature range. The contributions of grains in resistive and capacitive properties of the material can be obtained from the Nyquist plot. It is interesting to note that at room temperature, polarization loop (P ~ E hysteresis loop) of the sintered CSCTO showed lossy behavior. The use of TiO2 and CuO2 nano-sized powders in the starting stage of sample preparation with micron size of CaCO3 and SrCO3 powder promotes the kinetics of quick conventional solid state reaction at a microscopic level, that favors above possible mechanisms.

Characterization of Limestone in Pamekasan Madura Island as Raw Material for Producing Nano Precipitated Calcium Carbonate (NPCC)

Characterization of limestone in Pamekasan Madura island was investigated. So far, limestone at Madura island has low economic value as additional building material. Limestone was taken from three mining locations. The chemical composition of limestone was characterized by X-Ray Fluorescence (XRF), the crystalline phase was characterized by X-ray diffraction (XRD) and morphological investigation was analyzed by Scanning Electron Microscope (SEM). The results XRF tests are obtained limestone with very high purity from Blumbungan, Pamekasan, East Java with Ca content 99,25 wt%. Characterization by using XRD and SEM are showed 100% calcite phase with rhombohedral-cubic shape and a particle size of CaCO3 ranges between 1.594 – 2.503 μm. In conclusion, limestones from Blumbungan are able to material for producing nano precipitated calcium carbonate (NPCC). Furthermore, economic value of limestone in Madura Island are able to advance.