Ammonia Dosage Research Articles

Preparation of SiO2-IR3535 mosquito repellent nanocapsules and its performance study

The exploration of functional textiles signifies an inexorable path in the future advancement of the textile industry. In this study, sol-gel method was employed to encapsulate IR3535, a mosquito repellent substance, into silica nanocapsules, resulting in the production of silica-ethyl butylacetylaminopropionate (SiO2-IR3535) mosquito repellent nanocapsules with effective mosquito repellency. By manipulating factors such as surfactant dosage, ammonia dosage, wall-to-core ratio, alcohol-to-water ratio, rotational speed, reaction time, and reaction temperature, during the preparation process, the particle size was cpntrolled and optimal conditions for subsequent spining processes was obtained. The prepared SiO2-IR3535 mosquito-repellent nanocapsules exhibited uniform appearance and morphology with consistent size distribution (average particle size: 342 nm). In addition, these nanocapsules exhibited enhanced heat resistance and an oil loading rate of about 13 % as confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), infrared spectroscopy (FTIR), Raman spectroscopic simultaneous thermal analysis (STA), and elemental analyses, and kinetic modeling was performed to fit the release profiles of these capsules. Additionally, SiO2-IR3535 nanocapsules were added into polypropylene fiber by melt spinning method, the prepared polypropylene fiber has been uniformly dispersed both internally and externally within the fiber, thereby it can provide a sustained mosquito-repellent effect to the polypropylene fiber with SiO2-IR3535 nanocapsules.

Thiocyanate facilitating thiosulfate extraction of gold via inhibiting formation of passive layer

Thiosulfate leaching is a feasible alternative for cyanidation. However, thiosulfate is easily decomposed and forms the passive layer on the ore surface, thus hindering gold extraction. In this paper, by adding thiocyanate to reduce the undesirable effect, copper-ammonia-thiosulfate leaching system is utilized to extract gold from the calcine. This research investigated the factors affecting gold extraction and kinetics of the leaching system, and the potential reason and reaction mechanism of the thiocyanate for improving gold leaching efficiency were discussed and analyzed. Gold leaching percentage is increased from 62.99% to 88.45% by adding thiocyanate that is close to that of cyanidation. By using X-ray photoelectron spectroscopy, gold in the leachate may be in the form of gold(I) thiosulfate complex. The leaching mechanism and the reason for improving gold extraction by adding thiocyanate were investigated via characterization and the leaching thermodynamic analysis. The possible reason for improving gold leaching percentage lied in that the thiocyanate reduced the decomposition of thiosulfate, thus inhibiting the form of passivation layer. According to the leaching mechanism, thiocyanate is used as an additive in the copper-ammonia-thiosulfate leaching system, which is of great significance for facilitating gold recovery, lessening thiosulfate consumption, and reducing ammonia dosage.

Production of single cell protein from brewer’s spent grain through enzymatic saccharification and fermentation enhanced by ammoniation pretreatment

Brewer’s spent grain (BSG) is a major low-value by-product of beer industry. To realize the high value application of BSG, this work proposed a strategy to produce single cell protein (SCP) with oligosaccharide prebiotics from BSG, via ammoniation pretreatment, enzymatic hydrolysis, and fermentation. The optimum conditions of ammoniation pretreatment obtained by response surface method were 11 % ammonia dosage (w/w), 63 °C for 26 h. Suitable enzyme and yeast were screened to enhance the conversion of cellulose and hemicellulose in BSG into sugars and maximize the SCP yield. It was shown that using lignocellulolytic enzyme SP from Penicillium oxalicum and Trichosporon cutaneum, about 310 g of SCP with 80 g of arabinoxylo-oligosaccharides were obtained from 1000 g of BSG. This process is low cost, high efficiency, and easy to implement, which has good industrial application prospects.

Influence of alkaline sources for the electrochemical performance of NiCo layered double hydroxide nanostructures

The morphology and composition of nanostructures play important role in their electrochemical properties. Herein, NiCo layered double hydroxide (LDH) nanostructures were prepared by hydrothermal method with NaOH, urea and ammonia as alkaline sources, respectively. The types of alkaline can affect the morphology of the obtained NiCo LDH nanostructures. Compared with the NaOH as alkaline source, NiCo LDHs with urea and ammonia as alkaline sources exhibit obvious nanoflower structure. And the electrode corresponding to ammonia has the highest specific capacity (1498.98 F/g) at a current density of 1 A/g. And the dosage of ammonia was also influenced the composition of the obtained NiCo LDH nanostructures. Moderate ammonia dosage (0.9 mL) would ensure the purity of NiCo LDH, and achieve high specific capacity and high retention rate (82.9 %) at high current density (10 A/g). These obtained results can provide a new idea and sight for the promotion of the related electrochemical devices based on NiCo LDH materials.

Boosting 2,3-butanediol selective dehydrogenation over hierarchical Cu/silicalite-1 via tailoring metal-support interactions

Herein, Silicalite-1 supported Cu catalysts were synthesized by coupling the alkaline treatment and ammonia evaporation methods to synchronously introduce the hierarchical pores and strong metal-support interaction for anaerobic 2,3-butanediol dehydrogenation to acetoin. Characterization results demonstrated that mesoporous structures of resultant Cu/S-x-T can be enhanced by tuning the ammonia dosage in the synthetic solution to boost the formation of -Cu-O-Si- structures and improve the dispersion of copper species simultaneously. The increase in the reduction temperature would induce the reduction of Cu2+ existing in the form of -Si-O-Cu-O-Si-. Highly dispersed Cu0 and abundant Cu2+ sites with an appropriate Cu2+/Cu0 ratio brought about the superior activity of Cu/S-25-300 with a conversion of 78% and selectivity of 92%. A correlation analysis on the catalytic activity and Cu0/Cu2+ site densities as well as IR spectra of adsorbed 2,3-butanediol demonstrated that the synergic catalysis of Cu0 and Cu2+ was primarily responsible for the 2,3-butanediol dehydrogenation. Distinctively, DFT calculations revealed that Cu subnanoclusters was capable of catalyzing the 2,3-butanediol dehydrogenation to acetoin, following a similar reaction mechanism to the dehydrogenation of monohydric alcohols on Cu0 sites due to the size mismatch of reactive sites in reactants and catalytic structures.

Green and low-carbon preparation of ammonium paratungstate by adding ammonia to ammonium metatungstate solution

Since the current industrial method for ammonium paratungstate (APT) production from ammonium tungstate solutions involves evaporative crystallization to remove the excess ammonium, which discharges large amounts of wastewater and consumes considerable energy, a novel method for preparing APT from ammonium metatungstate (AMT) solutions by adding ammonia was developed and investigated systemically in this study. Thermodynamic calculations indicated that the dominant tungsten-containing anions depending upon the solution pH were: metatungstate [H2W12O406−] at pH 2–4, paratungstate [H2W12O4210−] and [W7O246−] at pH 5–8, and tungstate WO42− at pH > 8. The experimental results showed that the temperature, ammonia dosage, stirring speed, reaction time and different ammonium salts added affected the crystallization efficiency and crystalline morphology. The APT crystallization efficiency reached 91.4% with an average particle size of 492.2 μm under the following conditions: a temperature of 85 °C, a 1.6-fold stoichiometric ammonia dosage, a reaction time 5 h, a stirring speed 150 rpm and a C(NH4)2SO4 1 mol/L. The crystallization mechanism involved the transformations of isopolytungstate ion from H2W12O406− to the intermediate H6W12O426− and then to the final H2W12O4210−, which resulted in APT precipitation due to accumulation and combination of the H2W12O4210− and NH4+ ions in solution. The crystallized product exhibited the two primary phases (NH4)6[H6W12O42]·10H2O and (NH4)10[H2W12O42]·10H2O at 40 °C and 55 °C, respectively, while (NH4)10[H2W12O42]·4H2O was formed at temperatures ≥70 °C. Results showed that (NH4)6[H6W12O42] acted as an intermediate in APT crystallization from the AMT solution, which has not been previously reported. Compared with evaporative crystallization, this method for preparing APT product from AMT solutions by adding ammonia exhibits the advantages of (i) less chemical consumption, (ii) minor amounts of discharged wastewater, (iii) low production costs, and (iv) environmental friendliness.

NOX Concentration Prediction in Cement Denitrification Process Based on EEMD-MImRMR-BASBP

NOx concentration is an important indicator of the response to ammonia dosage and nitrogen emissions, and its accurate prediction allows for efficient and rational optimal control of ammonia dosage. Due to the large external noise, time lag and non-linearity of the cement denitrification process, it is difficult to derive accurate mathematical prediction models. Therefore, a new machine learning model, namely EEMD-MImRMR-BASBP, is developed. Firstly, Ensemble Empirical Mode Decomposition (EEMD) and median-averaged filtering is used to process the data and remove the noise. In order to handle the large time lags, non-linearity and non-smoothness among the variables, mutual information (MI) based on the entropy principle is proposed to calculate the lag time of the non-linear system; furthermore, according to the feature variable selection method of Max-Relevance and Min-Redundancy (mRMR), the factors with strong influence are selected as the input variables of the prediction model in combination with the results of the mechanism analysis. Then, the EEMD-MImRMR-BASBP model to predict NOX concentration is constructed, in which the initialization parameters of the Back Propagation Neural Network (BP) are searched by Beetle Antennae Search (BAS) to effectively overcome the parameter selection problem of traditional BP prediction models. Finally, the model was applied for the NOX concentration prediction of a real cement plant in Jiang xi and Fu ping and compared with the classical BP-based prediction model, BASBP model, the root means square error (RMSE) and mean absolute error (MAE) of the EEMD-MImRMR-BASBP model for the two production lines are only 0.2927, 0.3513 and 0.1795, and 0.2383, which have better prediction performance compared with the current model.

Estudo de diferentes proporções de milho x polpa cítrica x concentrado/volumoso na alimentação de ovinos da raça Suffolk

Dehydrated citrus pulp (PC) has been used in animal feed in pellet form, as an energetic and highly digestible ingredient of the fibrous classification for growing and lactating animals. The purpose of this experiment is data on the introduction of citrus products in replacement, in diets with the possibility of a greater variety of products between concentrates and forages. To evaluate the research, rumen fluid was used to determine pH and ammonia dosage and a blood sample to determine blood glucose and urea. With this work, the change from corn ration to citrus pulp, in any of them, did not interfere in any parameter evaluated.

The influence of SCR on main engine parameters

Air pollution from ships is increasing due to higher global demand of goods, and with them, global emission standards as well. These standards are prescribed by MARPOL Annex VI and the introduction of emission control areas (ECA). Ships built before 1990. do not have to comply with these rules, but ships built after the early 2000. must follow “NOx Emission Tier I”, which allows 17g/kWh NOx (for the slow speed diesel engines with <130 rpm), and selective catalytic reactors (SCR) are not necessary. Tier III NOx Emission standard was enforced in 2016 and it requires an 80% reduction in NOx emission compared to the Tier I, specifically 3.4 g/kWh, which can not be achieved without SCR or without using some other types of fuels. The focus of this paper is to do analysis how the ammonia dosage to SCR affects to the NOx formation in exhaust gasses on various engine speed (loads), as well as how it affects to some important engine parameters and specific fuel oil consumption (SFOC). The analysis was performed on Kongsberg engine room simulator (ERS), MC 90-V Model, as well as on MATLAB by using mathematical models. All external influences are excluded from the analysis like wind or rough sea. All data on different scenarios has been recorded after prolonged period to avoid inconsistencies. The results are shown graphically, and conclusions are presented.

Kinetic and isotherm studies of empty fruit bunch biochar on ammonium adsorption

The presence of excessive ammonium in wastewater due to agriculture and other industrial activities affects the aquatic plants, animals and human health. Common wastewater practice offers high cost and maintenance as well as low performance. The adsorption technique offers an efficient, economically favourable and reliable physicochemical treatment method. Despite the efficiency, the studies on Empty Fruit Bunch (EFB) biochar as an adsorbent for ammonium removal is under discovered. The conducted study described the characterization of EFB biochar together with its kinetic and isotherm studies for ammonium removal. EFB underwent conventional pretreatment using fixed bed reactor at temperature of 350, 450,550 and 650 °C for 60 min of holding time prior for characterization and kinetic studies. For characterization studies, moisture, ash and pH anlysis were performed before proceed with adsorption and kinetic studies. It was found that the increment of temperature resulted in high content of ash and low content of moisture while optimum pH was in the range of pH 7. The optimum condition for ammonium adsorption was 2.5 ppm of EFB, 0.05g of ammonia dosage and time exposure of 200 minutes. The ammonium adsorption followed the pseudo-second-order kinetic model which suggests that the ammonium adsorption process is controlled by the chemical adsorption mechanism. The finding suggests the utilization of EFB biochar as a good alternative for ammonium removal through adsorption process while increasing the biomass value.

Microstructural modification of hollow TiO2 nanospheres and their photocatalytic performance

The microstructure of photocatalysts plays a key role in enhancing their photocatalytic performance. Herein, resorcinol/formaldehyde (RF) polymer resin was prepared using the extended Stöber process and used for hard templates. Hollow TiO2 spheres (HTS) were synthesized via hydrolysis of a versatile kinetics-controlled coating and carbonization method. The physicochemical properties of as-prepared catalysts were characterized. The pure RF template had a uniform diameter of ~450 nm. By adjusting the ammonia dosage from 0.1 to 0.35 mL, monodisperse RF@TiO2 spheres were obtained with a porous TiO2 shell of ~25–160 nm in thickness. The concentration of ammonia had a significant effect on the micromorphology, and hence, the photocatalytic properties of the HTS. The Brunauer-Emmett-Teller surface area and pore volume were ~30 m2/g and 0.082 cm3/g, respectively. The intrinsically high conductivity of the HTS microspheres and their high surface area resulting from this robust hollow structure was beneficial for photocatalytic performance toward phenol decomposition.

P: 65 Drug-induced Hyperammonaemia: Data From VigiBase, the WHO Database

BACKGROUND: Altered consciousness secondary to metabolic encephalopathies represents a major cause of ICU admission with favorable outcome when diagnosed and treated rapidly. Ammonia dosage is thus recommended in most textbooks in the absence of any diagnosis after etiological work-up encompassing biological sampling, cerebral imaging and EEG. Despite hyperammonaemia is most commonly secondary to liver diseases, portosystemic shunts, inborn errors of metabolism, mostly urea cycle defects, microbial pullulation or drug-induced hyperammonaemia (DIH) are other possible causes. DIH is poorly described but is mainly recognized as the consequence of valproic acid. Some antineoplastic agents, fluorouracile or asparaginase, have been implicated but this class is evolving rapidly. To describe the drugs associated with DIH. METHODS: We used VigiBase, the WHO global Individual Case Safety Report (ICSR) database, which contains reports of suspected adverse drug reactions (ADRs) collected by national drug authorities in over 130 countries between 1967 and 8 May 2019. This observational retrospective study included all ADRs reported as "hyperammonaemia" according to the Medical Dictionary for Drug Regulatory Activities (MedDRAv21.1) term (Prefered term [PT] level). The drugs considered in the analysis were those notified as suspected treatments. Drugs used to treat hyperammonaemia or hepatic encephalopathy were excluded as were drugs reported less than 3 times. Drugs with a positive lower end of the 95% credibility interval for the information component (IC025) ≥0, an indicator value for disproportionate Bayesian reporting, was considered as causative of hyperammonaemia. RESULTS: Among 19 438 165 ICSRs, 576 drugs were identified for the term "hyperammonaemia [PT]". Six were excluded because they were used to treat hyperammonaemia or hepatic encephalopathy. Thus, 73 drugs had a an IC025 ≥0 and represented 2759 cases (0.014%). Twelve drugs were reported more than thirty times (Table 1). CONCLUSION: Besides commonly involved drugs, some other commonly used drugs seem associated in DIH. These data could help in the etiological work-up of hyperammonemia.

Modified mineral carbonation of phosphogypsum for CO2 sequestration

A modified phosphogypsum carbonation was systematically investigated, and ammonium acetate was used to separate Ca2+ and concentrate impurity ions from PG. The effect of technological conditions on salt-leaching and carbonation results were discussed. The calcium leaching rate was 98.1%, and the only crystal phase of salt-leaching product was quartz with granular morphology and some pores in the surface. The carbonation ratio (η) was 98.32%, and 1000 kg of phosphogypsum produced 510 kg of high-purity CaCO3 and sequestered 224 kg of CO2 under the optimized conditions. The spherical vaterite carbonation product met the recommended Chinese standard (HG/T 2226-2010). The carbonation filtrate can be reused for salt-leaching experiments. Various polymorph and morphology of CaCO3 were achieved by adjusting the carbonation temperature and ammonia dosage. The mechanism of phosphogpysum carbonation was studied by using thermodynamics research. All of this indicated that the whole procedure setup of phosphogypsum carbonation showed potential application for phosphogypsum utilization and CO2 sequestration.

Mineral CO2 Sequestration by Carbonation of Glauberite

CO2 mineral sequestration has significant advantages such as safety and permanence, but its industrial application is limited by high costs. Combining CO2 mineral sequestration with existing industrial processes can make it economically viable by integrating ore extraction, crushing and grinding, and avoiding the construction of new carbonation plant. In this paper, CO2 mineral sequestration was combined with the leaching of sodium sulfate from glauberite. The dissolution behavior and carbonation process of glauberite ore were studied in detail. The influences of key parameters such as ammonia dosage, CO2 pressure and temperature were also investigated. The results showed that under the optimal conditions (ammonia dosage 110%, CO2 pressure 5 bar, temperature 100°C), the carbonation rate of glauberite can reach 93.4%, while the concentrations of sodium ion and sulfate ion were 25.8g/L and 53.8g/L, respectively. The increase of ammonia dosage and CO2 pressure contributed to the dissolution and carbonation of glauberite. Temperature, however, affected them in two very different ways.

Time-resolved copper speciation during selective catalytic reduction of NO on Cu-SSZ-13

Practical catalysts often operate under dynamic conditions of temperature variations and sudden changes of feed composition that call for understanding of operation and catalyst structure under analogous experimental conditions. For instance, the copper-exchanged small-pore SSZ-13 catalyst used currently in the selective catalytic reduction of harmful nitrogen oxides from the exhaust gas of diesel-fuelled vehicles operates under recurrent ammonia dosage. Here, we report the design of unsteady state experiments that mimic such a dynamic environment to obtain key mechanistic information on this reaction. Through the combination of time-resolved X-ray absorption spectroscopy and transient experimentation, we were able to capture an ammonia inhibition effect on the rate-limiting copper re-oxidation at low temperature. The practical relevance of this observation was demonstrated by optimization of the ammonia dosage on a catalyst washcoat on cordierite honeycomb, resulting in lower ammonia consumption and an increase in nitrogen oxide conversion at low temperature. Selective catalytic reduction is employed at the exhaust of diesel vehicles to abate nitrogen oxide emissions. Now, guided by time-resolved X-ray absorption spectroscopy and transient experiments using Cu-SSZ-13 as the catalyst, the authors unravel important features of the reaction mechanism that allow the performance of the catalyst to be improved.

Reactions related to asparaginase infusion in a 10-year retrospective cohort.

IntroductionAlthough it is an essential component of the treatment of acute lymphoid leukemia in children, asparaginase causes adverse reactions that sometimes make it impossible to use it fully. Hypersensitivity reactions are the most frequent and may lead to early discontinuation of treatment. The present study aimed to investigate suspicions of adverse reactions during the infusion of asparaginase in a pediatric cohort.MethodsA retrospective observational study was carried out at a university pediatric institute in the state of Rio de Janeiro. Information regarding clinical features and characteristics of adverse reactions was collected from hospital medical records. Suspicions of adverse reactions were classified regarding causality and severity.ResultsSeventy-three suspicions of adverse reactions were recorded during asparaginase infusion in 72 children in the study period. Allergic hypersensitivity reactions were suspected in 60.5% of the cases. Of these, 25% of the reactions occurred during induction and 61.1% in concomitant use with vincristine, findings that diverge from other studies. High-risk classification and younger age were considered risk factors for these reactions. A total of 72.4% of the reactions were classified as grade 1 or 2, which suggest that not all are related to antibody formation; this highlights the importance of differential diagnosis with other reactions, such as non-allergic hypersensitivity and hyperammonemia.ConclusionThe implementation of the differential diagnosis of reactions related to infusion of asparaginase with ammonia dosage and classification of the grade of reactions is crucial to facilitate the identification and proper management of each type of reaction.

Synthesis and characterization of hollow mesoporous silica spheres with tunable shell thicknesses and its application in ibuprofen delivery

By using SBA-15 and RF latex with an average diameter of around 400 nm as dual templates, the hollow mesoporous silica spheres (H-SBA15) with highly ordered parallel pore size distribution centered at 3.8 nm were subsequently synthesized via modified Stober method. Meanwhile, in order to synthesis radial pore size distribution, as compared with that of H-SBA15, hollow mesoporous silica spheres (H-BMMs) were synthesized by using RF latex as a hard template and cetyltrimethylammonium bromide as a soft template. The effects of RF additives on the structural properties of H-SBA15 and H-BMMs were systematically investigated via XRD, N2 sorption isotherms, SEM, and TEM method. It was found that their tunable shell thickness could be easily controlled from 35 to 75 nm, particularly, the mesopores structures of H-BMMs were effectively tailored by adjusting ammonia dosage during sol–gel process, showing a decreasing tendency for d value of (100) peak and gradual disappearance of mesopores. Their drug-loading and releasing performances were preliminary investigated using ibuprofen as a model drug.

Characteristics-based model predictive control of selective catalytic reduction in diesel-powered vehicles

In heavy-duty diesel exhaust systems, selective catalytic reduction (SCR) is used to reduce NOx to nitrogen to meet environmental regulations. Diesel exhaust after-treatment involves a set of components that are best characterized as distributed parameter systems. Thus, the optimal ammonia dosage in the SCR is an important and challenging problem in diesel exhaust treatment. In this work, we propose a method to synthesize an optimal controller for the SCR section of the diesel exhaust after-treatment system, which is based on a system model consisting of coupled hyperbolic and parabolic partial differential equations (PDEs). This results in a boundary control problem, where the control objectives are to reduce the amount of NOx emissions and ammonia slip to the fullest extent possible using the inlet concentration of ammonia as the manipulated variable and assuming that the concentrations of nitric oxide and nitrogen dioxide and ammonia, are measured at the SCR inlet and outlet. The proposed method combines the method of characteristics, spectral decomposition and the model predictive control (MPC) approach. For performance comparison purposes, the open-loop dynamic optimization problem is solved via Direct transcription (DT) to compute the upper performance limit for the optimal SCR problem. The results show that the proposed approach is able to achieve a very high level of control performance in terms of NOx and ammonia slip reduction.

Synthesis and characterization of nesquehonite (MgCO3·3H2O) powders from natural talc

The feasibility of synthesis of nesquehonite powders from natural talc was evaluated both through theoretical and experimental approaches. The change of the Gibbs free energy was −318kJ/mol with its corresponding equilibrium constants (K) of 5.53×1055, which indicated that the reaction could proceed spontaneously. Pure phase of nesquehonite was successfully obtained from natural talc at a low temperature and ambient pressure under the action of ammonia. The effects of reaction temperature and ammonia dosage on the precipitation of MgCO3·3H2O have been investigated. XRD and SEM results demonstrated that the reaction temperature had a significant impact on the crystal phase of the products, while the ammonia dosage showed no serious effect on the morphology of the products, but had important influence on the length of the crystals. With the optimization of operating conditions (reacted at 60°C with 8mL ammonia), the nesquehonite crystals were prepared and could grow up to a length of about 19.31μm and a width of 0.96μm. During the crystallization process, the nesquehonite crystals were transformed from magnesium bicarbonate obtained from magnesium, and have a preferential orientation growth in the (002) direction. The growth process of nesquehonite crystals accorded with the solution-liquid–solid mechanism.

Modified wollastonite sequestrating CO2and exploratory application of the carbonation products

The feasibility of wollastonite carbonation for CO2 sequestration was systematically investigated, and the recovery of the by-products (SiO2, NH4Cl) in the carbonation process, the controllable preparation of carbonation product (CaCO3) with different polymorph and morphology during the carbonation process, and the application of the carbonation product were evaluated. The ammonia dosage and volume of the Ca2+ leaching solution showed a prominent effect on the wollastonite carbonation ratio. The synthesis of the carbonation product (CaCO3) with different polymorphs and morphologies was successfully realized by controlling the temperature and ammonia dosage during the carbonation process. A reaction mechanism of wollastonite carbonation was also proposed by thermodynamic research of the gas–liquid–solid reaction. The carbonation ratio could reach up to 93%, and 1 ton wollastonite could sequester 350 kg of CO2 under optimized conditions. The crystalline phase of the as-obtained CaCO3 was spherical vaterite and cubic calcite, which could meet the relevant standards for the industrial precipitated calcium carbonate CaCO3 (HG/T 2226-2010). The physical properties of the corresponding PP/CaCO3 composites were very close. The cost of wollastonite carbonation was estimated to be 120 $ per t without industrial scale experiment. The wollastonite carbonation strategy showed potential application for CO2 sequestration.