Mineral Products Research Articles

Low- and zero-cement frozen backfill within permafrost mining conditions: A review.

This review examines the emerging field of unconventional backfilling methods in freezing conditions, specifically tailored for remote mining operations in permafrost regions. Meeting the demand for mineral resources while addressing environmental concerns necessitates innovative approaches in mineral production and mining operations. This review aims to give a very first catalog of novel unconventional backfills in freezing conditions which is being encountered in remote mining areas like permafrost regions. As mining expands into these challenging environments, logistical obstacles, high costs, and environmental considerations arise. Conventional backfilling often relies on cement, which poses economic and environmental challenges due to carbon emissions and costs. Research has explored alternative backfill compositions and deployment strategies. Unconventional mixtures, sometimes without cement or using alternative binders, have gained attention in freezing conditions. Studies suggest that frozen backfill can be stronger than unfrozen alternatives, with water acting as a natural binder during freezing. However, the extended freezing process requires innovative deployment methods and consideration of seasonal limitations. Key findings indicate that faster freezing processes can improve strength, yet the adverse effects of freezing on cement hydration necessitate alternative materials, such as zero-cement backfill and using alternative binders. Despite the promise of unconventional backfilling, several areas still require further exploration. Mechanisms to enhance freezing rates, alternative binder materials, and factors affecting strength and thermal conductivity need continued investigation. In our pursuit of novel backfilling methods, there remains much ground to cover. The main outcome of this review is the identification and evaluation of unconventional backfill materials and methods for use in freezing conditions, highlighting their potential advantages over conventional cement-based backfills. It underscores the need for further research into alternative binders, deployment strategies, and the optimization of freezing processes to enhance backfill strength and address economic and environmental concerns in remote mining areas.

Green guardians: Harnessing biopesticides for sustainable vegetable pest management

Insect pests pose significant challenges to vegetable crops, causing not only economic losses but also compromising the quality of our food. Shockingly, up to 20 % of globally produced goods fall victim to these insidious invaders. While chemical insecticides have historically bolstered food production, they come with notable drawbacks, including handling risks, residue concerns and negative impacts on non-target species and the environment.Though they have not yet completely replaced chemical insecticides, biopesticides are becoming key in reducing pesticide overuse and promoting safer, residue-free food and environments. Derived from plants and microorganisms, biopesticides offer a safer alternative, ranging from plant extracts to microbial agents such as bacteria, fungi, viruses and nematodes. Additionally, insect hormones and semiochemicals, along with silica-based mineral products like activated clay and rice husk, contribute to eco-friendly pest control solutions. Cutting-edge nano biopesticides also deliver unparalleled pest control with precision targeting and excellent environmental credentials.In this comprehensive exploration, we delve deep into the myriad forms of biopesticides, their commercial availability, modes of action and the advantages and disadvantages in vegetable pest management. Crucially, we illuminate the path toward integrating biopesticides into holistic pest management strategies, which can lead to healthier crops, increased yields and more sustainable agricultural practices. By emphasizing biopesticides, we can promote environmental safety and support a greener future in agriculture.

Travelling Formulas

Abstract Plant, animal, and mineral products travelled thousands of miles from Central and South Asia, the Mediterranean, and even Africa to become part of the Chinese pharmacopeia. These products were often used as drugs that were commonly bundled in formulas. While individual drugs were gradually incorporated as part of Chinese medicine, the formula preparations which regularly carried them remain relics of history. By first examining identification and linguistic information, and then looking closely at several formulas containing chebulic myrobalan (Terminalia chebula Retz.) from both Indic and Chinese sources, we can understand better how this drug and its corresponding medical information made its way from South Asia to East Asia, thereby becoming part of the Chinese medical system.

Russian exports amid geopolitical instability: The case of physical and transitional climate risks

The paper examines the impact of physical and transitional climate risks, which to some extend shape the geopolitical situation in the world, on Russian exports. The gravity model of international trade was employed to model the existing relationship. Estimation of the gravity equation by means of the Poisson Pseudo Maximum Likelihood (PPML) method using data on Russian export flows to 72 countries over the period 2010—2021 revealed that climate change and the ambitions of trading partner states towards low-carbon development determine the dynamics of Russian exports. In particular, national physical climate risks have a detrimental impact on Russia’s exports due to the destruction of infrastructure, loss of capital, reduced quality and availability of natural resources, and increased social tensions. Extreme climatic events and climate change measures in trading partner countries spur the development of Russian exports. Namely, physical climate risks of importing countries may increase the demand for key Russian goods for economic recovery purposes. Changes during the transition to a low-carbon economy in trading partner countries also generate opportunities for Russian export growth due to the country’s role as a major supplier of energy and mineral products, as well as technologies for the alternative energy production and electrification of transport

Gelatin-Modified Bioactive Glass for Treatment of Dentin Hypersensitivity

When dentin is directly exposed to the oral cavity for various reasons, such as a lack of enamel on the tooth surface, external stimuli to the dentin often cause transient discomfort known as dentin hypersensitivity. In order to block the incoming stimulus signal, an ideal treatment is to induce the production of minerals to block the dentinal tubules. In this work, a dentin-desensitizing plugging material was prepared by modifying mesoporous bioactive glass with gelatin, the mineralization and desensitization effects of which were compared with Gluma in in vitro experiments. These experiments confirmed that gelatin-modified bioactive glass (MBG@PDA@Gel) is more effective than traditional desensitizing agents at blocking dentin tubules. Following the successful synthesis of MBG@PDA@Gel, as confirmed by scanning electron microscopy, transmission electron microscopy, and other tests, the treatment of demineralized dentin with MBG@PDA@Gel demonstrated that the dentinal tubules were tightly blocked under scanning electron microscopy. MBG@PDA@Gel induces minerals in deeper layers of dentinal tubules, promoting remineralization and forming a unified structure with the tubule blockage. Animal studies showed that MBG@PDA@Gel can remineralize demineralized dentin, and it is stable in the oral cavity and does not fall out. MBG@PDA@Gel not only enhances the biocompatibility of the nanoparticle but also results in an overall uniform and rapid remineralization of the demineralized dentin.

Comparative Life Cycle Assessments of Laboratory and Pilot-Scale Mechanochemical Processes for Producing Carbonated Mineral Products as Cement Substitutes.

The use of carbonated mineral products in cement production reduces carbon emissions and enhances durability. This study evaluated the environmental sustainability of using mineral carbonated biomass fly ash (BFA) as a partial cement replacement in European cement production. Laboratory-scale and simulated large-scale scenarios were analysed. Incorporating 20% mineral carbonated BFA showed potential for a 33% reduction in the annual Global Warming Potential (GWP) of cement products. Energy consumption factors, such as ball milling and mineral carbonation processes, were evaluated using a machine learning model and comminution flow sheet model simulations. The machine learning model predicted CO2 absorption and energy requirements for mineral carbonation, showing greater efficiency in large-scale scenarios. Life cycle assessments consistently revealed GWP reductions for OPC-BFA mixtures, with additional emissions reductions when incorporating flow sheet modelling and machine learning data. However, the study's limitations include simplified CO2 flue gas treatment, use of the mean EU electricity mix, exclusion of transportation impacts, and reliance on simulation data. Additionally, the cement mix exhibited reduced compressive strength. This study highlights the potential of mineral carbonated BFA to reduce cement production's environmental impact while emphasising the need for balanced optimisation between sustainability and material performance.

Effects of tailings disposal on the environment: A case study of Nampundwe Mine

Globally, the demand for mineral products is ever increasing. Extraction of these mineral resources results in the continuous production of a huge volume of waste material, including tailing dumps. The mass of tailings usually exceeds the actual resource and often contains hazardous contaminants. This study investigated the effects of tailings disposal on soil, water, and air quality in the Nampundwe area. Water, soil, and dust samples were collected from different locations in the surrounding communities. The constituents analysed in the samples included copper, cobalt, iron, sulfate, and silica. According to the results obtained, some seepages occurred from the tailings impoundment to the shallow aquifer in the area. However, the general water quality meets the Zambia Environmental Management Agency (ZEMA) statutory limits. Recorded concentrations of sulfate (1500 mg/l), copper (1.5 mg/l), cobalt (1.0 mg/l), iron (2.0 mg/l), and silica were between 0.003 mg/l and 705 mg/l, which is far below ZEMA's statutory limit. Silica concentration was also evident in the air. The highest concentration recorded was 260 ppcc (particle per cubic centimeter) recorded in July 2019 from the northern direction of the tailings dam. The concentration was below the statutory limit of 350 ppcc. The topsoil from the northern part of the tailings recorded a silica dust concentration of 39.9 ppcc. Iron was evident in the underground soil with a concentration of 8.01 ppcc, cobalt 0.005 ppcc, copper 0.051 ppcc, while sulfate was recorded as 0.41 ppcc.

Identification and Evaluation of Synergy Between Carbon Emissions and Air Pollutants in Inter-Industrial Trade Among Provinces in China

With the vigorous promotion in China of efforts to reduce pollution and carbon emissions, examining their synergies becomes increasingly crucial. This study used the multi-regional input–output (MRIO) table to build the consumption-based industrial emissions inventories of CO2 and three major air pollutants (PM2.5, NOx, and SO2) and constructed synergistic emission indices of the intensity and magnitude to identify and evaluate the synergy between carbon emissions and air pollutants in inter-industrial trade among 30 provinces in mainland China. The results show that more than 85% and 40% of inter-provincial and inter-industrial trades have synergistic emissions between CO2 and air pollutants, respectively. We identified 77 inter-provincial trades and 84 inter-industrial trades among provinces with strong synergistic emissions. They are mainly reflected in the demand of the construction industry in Zhejiang and Guangdong for the nonmetal mineral products manufacturing industry in Henan, and the metal smelting and processing industry in Hebei, along with the demand of the service industry in Beijing for the electric power, steam, and hot water production and supply industry in Inner Mongolia. Our study provides new insights into the synergistic reduction of CO2 and air pollutants within the supply chain, thereby enriching the discourse on regional and industrial synergies in achieving sustainable development goals.

Artificial Neural Networks for Mineral Production Forecasting in the In Situ Leaching Process: Uranium Case Study

This study was conducted to assess the applicability of artificial neural networks (ANN) for forecasting the dynamics of uranium extraction over exploitation time during the process of In Situ Leaching (ISL). Currently, ISL process simulation involves multiple steps, starting with geostatistical interpolation, followed by computational fluid dynamics (CFD) and reactive transport simulation. While extensive research exists detailing each of these steps, machine learning techniques may offer the potential to directly obtain extraction curves (i.e., the concentration of the mineral produced over the exploitation time of the deposit), thereby bypassing these computationally expensive steps. As a basis, both an empirical experimental configuration and reactive transport simulations were used to generate training data for the neural network model. An ANN was constructed, trained, and tested on several test cases with different initial parameters, then the expected outcomes were compared to those derived from conventional modeling techniques. The results indicate that for the employed experimental configuration and a limited number of features, artificial intelligence technologies, specifically regression-based neural networks can model the recovery rate (or extraction degree) of the ISL process for mineral production, achieving a high degree of accuracy compared to traditional CFD and mass transport models.

Preliminary Studies on the Effect of Soil Conditioner (AMP) Application on the Chemical and Microbiological Properties of Soil under Winter Oilseed Rape Cultivation

This study analyzed the effect of the application of a soil conditioner under the trade name of the Agro Mineral Product (AMP) in the winter rapeseed cultivation on the bacterial and fungal abundance, ion concentrations, and electrolytic conductivity of the soil solution. It was demonstrated that the AMP influenced changes in the total abundance of the culturable fractions of the soil bacteria and fungi at each of the tested time points. A stimulatory effect of the preparation on the growth of the soil bacteria and an inhibitory effect on the development of the fungi was observed, particularly at doses of 4 and 8 t·ha−1. A dose of 12 t·ha−1 proved to be the least effective in relation to the development of the soil microbiome. Increasing the AMP fertilization dose above 4 t·ha−1 caused changes in the chemistry of the soil solution (pH, EC, HCO3−, K+, and PO4-P). It is worth noting that this primarily resulted in decreases in the amounts of mobile forms of potassium (from 40.4 mg·dm−3 in the control to 26.7 mg·dm−3 at the 8 t·ha−1 dose) and orthophosphate as phosphorus (from −6.00 mg·dm−3 in the control to 3.75 mg·dm−3 at the 8 t·ha−1 dose) in the soil solution, which resulted in a reduction in the yield of the winter rapeseed (from 4.76 t·ha−1 in the control to 4.61 t·ha−1 at the 8 t·ha−1 and 4.43 t·ha−1 at the 12 t·ha−1 AMP dose).

MINERAL PRODUCTION AND ENVIRONMENTAL POLLUTION IN NIGERIA

This study empirically determined the effect of mineral production on environmental pollution in Nigeria from 1985 to 2022. The research utilised time series data obtained from the Central Bank of Nigeria (CBN) data bulletin and the World Development Indicators (WDI) of the World Bank. The data analysis methodologies utilised include descriptive statistical analysis, ADF Unit Root test, ARDL Bound Co-integration test, and ARDL methodology. The result of the ADF unit root test indicated the presence of a combination of stationary and non-stationary elements. That is a mixture of I(0) and I(1). Furthermore, the ARDL limits co-integration test has shown the presence of a long-term link between the variables. Finally, the ARDL estimation revealed that crude petroleum and natural gas production, likewise mining and quarrying had significant and positive implication on emission of CO2 in both long and short runs. Coal production had positively significant impact on CO2 emission in the long run but positively insignificant impact in the short run. In addition, metal ores positively and insignificantly impacted on CO2 emission in both the long and short runs. The study's results indicated that mineral mining in Nigeria resulted in a rise in environmental contamination. The report proposed that the Nigerian government should thoroughly evaluate and revise current environmental laws and regulations in order to effectively address the environmental consequences of mineral development. This should include establishing clear standards, guidelines, and permits for mining operations, waste management, pollution control, and rehabilitation of mining sites. KEYWORDS: Mineral Production, Environmental Pollution, CO2 Emission

Formation of zinc tetraammine difluoride and dinitrate and conversion to zinc oxide and zinc hydroxyfluoride under ambient conditions

The zinc tetraammine complexes [Zn(NH3]4]F2 (ZAF) and [Zn(NH3]4](NO3)2 (ZAN) have been isolated from methanolic ammonia and characterized by single crystal X-ray diffraction and Raman spectroscopy. As determined from Raman data, the tetrahedral structure of the zinc tetraammine cation complex is sustained in solutions that contain high concentrations of ammonia. Dilution of ZAF or ZAN solutions in bulk water results in the deposition of ZnO as determined by X-ray powder diffraction (XRD). Lower dilution, as when aqueous ZAF is applied to wet surfaces, results in Zn(OH)F deposition as identified by XRD. These mineral products are readily obtained from zinc tetraammine solutions under ambient conditions and lend themselves to biomedical and materials applications.

Sustainable integration of mineral resources, low carbon transition, and economic resilience in China

Mineral sustainability has become a crucial topic for economists in recent decades. This study provides key insights into China's sustainability challenges, particularly regarding ferrous mineral production, economic resilience, and low-carbon transition goals. Using data from 1980 to 2022 analyzed with the ARDL technique, the research highlights significant negative impacts of ferrous mineral production, economic uncertainty, and carbon emissions on green energy progress. This underscores the need for urgent actions to enhance sustainability in the mineral sector and support green energy initiatives. Economic instability hampers long-term green energy development, making economic resilience essential. Sustainable population management is also crucial due to its effects on green energy advancement. Conversely, ICT advancements offer promise for sustainable development. China should implement a comprehensive policy framework focused on sustainable mineral use, carbon reduction, and economic stability, including measures such as promoting electric vehicles and improving green tax efficiency.

Product differentiation in mineral commodities based on sustainability indicators: The case of copper mining

Metals are commonly characterized as commodities, as there are little to no differences across products. Despite this traditional view, there has been an increasing attempt to assess mineral production, including socioeconomic and environmental impacts, besides their financial performance. In this line, sustainability reports have been the fundamental tool to provide transparent and public information on these impacts, varying in quality and quantity across companies. Based on this premise, we analyze several indicators to assess the potential for differentiation in the copper mining industry. We consider mine site-level data on water withdrawal and greenhouse gas (GHG) emissions, publicly available from sustainability reports from companies operating in 20 countries representing almost 80% of global production. Socioeconomic and governance data is available nationally, which limits more detailed analysis in these aspects. Data gathering indicates that since 2017, copper companies have stabilized regarding the availability of data provided in sustainability reports.Results for copper mining show that water withdrawal is a leading indicator in terms of differentiation potential. Differentiation is higher when continental water is considered, creating a significant incentive for companies to invest in alternative water sources. Sustainability differentiation in copper mining disproportionately affects low-income countries when socioeconomic aspects are considered, mainly if governance measures are used. In this sense, high-income countries are more likely to support product differentiation based on responsible production standards.

Response of renewable energy minerals to energy policy and technological advancement: An assessment of the Russian energy crisis

The world is turning to renewable energy sources to combat environmental degradation. This is part of Sustainable Development Goal (SDG)-7, which envisions affordable and clean energy. However, achieving the SDG-7 targets and spreading clean energy requires extracting and utilizing various minerals. Russia is one of the leading countries in the world in terms of cobalt, graphite, and rare elements used for renewable energy production. Russia must increase the production of minerals for renewable energy production to achieve SDG-7. In this context, the study aims to investigate the impact of energy policy uncertainty (ENPU), environmental policy stringency (EPS), environmental patents (ETEC), and information and communication technologies (ICT) on renewable energy minerals in Russia. To this end, the study uses novel multivariate quantile-on-quantile regression (M-QQR) and cross-quantilogram (CQ) approaches for the period from 2002m9–2020m12. The M-QQR results show that EPS, ICT, and ETEC increase the extraction of renewable energy minerals, while ENPU inhibits the extraction of cobalt, graphite, and rare elements. The main results indicate that technological progress supports the extraction of renewable energy minerals in Russia and that a strict environmental fiscal policy contributes to the achievement of SDG-7. Based on the findings, Russia needs to support technological progress in the ecological field, implement strict environmental policies, and reduce uncertainties related to energy policies to extract renewable energy minerals and advance the achievement of SDG-7.

PSV-25 Investigating the effects of Chromium Propionate supplementation on productive and reproductive performance of beef cows

Abstract We investigated the effects of Chromium Propionate supplementation on reproductive performance of beef cows from pre-partum to weaning. Suckled beef cows at nine locations were enrolled in the study. Within location, cows were stratified by parity, dam age, and day postpartum (DPP) and randomly assigned to one of two treatments: 1) Control, supplementation of a mineral product at 113 gּ animal-1ּ d-1 (n = 464 cows; 13 experimental units); or 2) CrP, supplementation of mineral product at 113 gּ animal-1ּ d-1 containing 1.4 g of Chromium Propionate (0.4%KemTRACE Chromium 0.4%, Kemin Industries, Inc., Des Moines, IA; n = 489 cows; 13 experimental units). Treatments were initiated at approximately 37 d pre-calving until weaning for a total of 250 ± 12 d. Cows were enrolled in the 7-d CO-Synch+CIDR fixed-time artificial insemination (TAI) protocol followed by natural service for a 70-d breeding season. Pregnancy diagnosis was performed by ultrasonography at 55 d after TAI protocol and 40 d after the end of the breeding season. Cow body weight (BW) and body condition score (BCS) were recorded at initiation of the TAI protocol (d -10), at pregnancy diagnosis (d 55 and 110), and at weaning (d 285). Within group, mineral disappearance was determined by the difference in weight between offered mineral and refusals. Data were analyzed using the GLIMMIX and MIXED procedures of SAS with pasture/group as the experimental unit with the effect of treatment and included group (treatment × location), cow (group), and location as random variables. Age, DPP, d -10 BCS, and BW were similar (P > 0.05) between treatments (5.4 and 5.3 ± 0.61 yr, 79.2 and 79.9 ± 4.61 d, 5.1 and 5.2 ± 0.05, 515.7 and 515.6 ± 15.11 kg for Control and CrP, respectively). Mineral disappearance was similar (P = 0.999) between treatments (165.5 and 152.9 gּ animal-1ּ d-1, for Control and CrP, respectively). Cow BW was similar (P > 0.05) between treatments on d 55, 110 and 285 (558.5 and 551.4 ± 14.50 kg, 580.8 and 594.6 ± 13.51 kg, and 574.2 and 570.9 ± 14.32 kg for Control and CrP, respectively). Similarly, cow BCS did not differ (P > 0.05) between treatments on d 55, 110 and 285 (5.4 and 5.4 ± 0.09, 5.3 and 5.3 ± 0.10, and 5.1 and 5.2 ± 0.10 for Control and CrP, respectively). Calf birth and weaning BW were similar (P > 0.05) between treatments. However, CrP-supplemented cows tended (P = 0.081) to have greater estrus expression (60.2 and 68.3 ± 3.1 %, for Control and CrP, respectively) and CrP-supplemented cows had greater (P = 0.045) TAI pregnancy rate when compared with Control cows (49.9 and 55.2 ± 2.1 %). Supplementation of Chromium Propionate to beef cows from pre-partum through weaning did not affect cow BW and BCS, tended to increase estrus expression and increased TAI pregnancy rate.

Global Perspectives on Laterite Mining and Extraction and its Environmental Implications for Nigeria

This paper explores the economic, environmental and social aspects of laterite mining techniques in Nigeria and around the world. Tropical and subtropical climates are home to the rich iron and aluminium oxide-containing soil and rock known as laterite. The article examines the several kinds of laterite deposits found in Nigeria, such as siliceous, bauxitic and ferruginous laterites. The economic significance of laterite mining is derived from its contribution to the construction, steel, iron and aluminium sectors. But there are also serious environmental problems associated with laterite mining like soil erosion, water contamination and deforestation. The energy-intensive character of mineral processing may increase emissions of greenhouse gases. Uncontrolled mining operations have the potential to uproot communities, worsen social injustices and fuel violence. This paper highlights the weaknesses of the regulatory framework in Nigeria, including weak enforcement, inadequate community engagement and limited financial provisions for mine closure and rehabilitation, Laterite mining offers economic benefits through the provision of materials for building and road construction as well as the production of aluminium, iron and other valuable minerals. Finally, governments should implement stricter enforcement mechanisms for existing mining regulations.

Digitalization of the economy and sustainability of metallic mineral production

Due to the adverse impacts of climate change on the environment and biodiversity, sustainability has become a critical issue. This paper investigates the impact of digitalization on the sustainability of metallic mineral production, particularly CO2 emissions, within the Regional Comprehensive Economic Partnership (RCEP). Using data from 1998 to 2020 and the cross-sectional FMOLS technique, the study finds that a 1% increase in ICT investment reduces CO2 emissions by 0.32%, and a 1% rise in Internet access decreases emissions by 0.28%. However, electrification increases emissions due to higher energy demand and fossil fuel reliance. Economic growth and metallic resource trade volume also elevate emissions. Policy recommendations include smart urban development, sustainable rural electrification, fostering internet access, and implementing green logistics in metallic production trade to enhance sustainability in RCEP countries.

Efficient mineralization of cadmium and arsenic by poorly crystalline CaFe-layered double hydroxide in soil: Performance and mechanism

The co-contamination of arsenic (As) and cadmium (Cd) in the environment is of most concern. In this work, poorly crystalline CaFe-layered double hydroxide (CaFe-LDH) was synthesized with a Ca-to-Fe molar ratio of 4 to ensure effective immobilization of Cd and As in soil. The application of Ca4Fe-LDH in soil remediation demonstrated that the targeted heavy metals gradually mineralized into a relatively stable oxidizable and residual state. At a soil remediation dosage of 1.6%, the availability levels of Cd and As decreased significantly, achieving stabilization efficiencies of 99% and 85.2% respectively. Cd is trapped through isomorphic substitution and dissolution-reprecipitation of calcium (Ca) laminate, resulting in the formation of CdCaFe-LDH mineralization products. As is immobilized through ion exchange with interlayer anions, redox with Fe(III), and Fe-Cd-As complexation. Moreover, the results of the characterization and density functional theoretical (DFT) calculations demonstrate that the CdCaFe-LDH formed by isomeric substitution of Ca for Cd enhanced the adsorption of As on the (110) plane of LDH, indicating that the trap mechanism of Cd and As by Ca4Fe-LDH is synergistically promoted. Overall, the above results prove that mineralization using Ca4Fe-LDH is a promising method to remediate soils combined contaminated by both Cd and As.

Cross-scale characteristics and emission reduction pathways of trade-embodied carbon flows in the global supply Chains

In the context of the 1.5 °C warming target, there is a growing awareness of the increasingly frequent carbon flows between subregions. However, understanding the characteristics and pathways of cross-scale carbon flows between subregions and regions remains elusive and impedes achieving emission reduction targets. This study employs a nested multi-regional input–output model and the structural path analysis method, establishing the characteristics of the carbon emission transfer network within global supply chains and discerning the crucial structural pathways and nodes for carbon emissions. The study found that (1) in 36 major countries, the embodied carbon flows are predominantly influenced by the developed countries around China in Asia and the Pacific. (2) In 30 subregions, coastal subregions with large-scale foreign trade and energy-intensive subregions in China's central and western parts contribute significantly to the larger embodied carbon outflow due to exports. (3) “Manufacture of non-metallic mineral products (S09) → construction (S19)” and “manufacture and processing of metals (S10) → construction (S19)” are the two key pathways of paramount significance of embodied carbon emissions. (4) “R25 South Korea” has the highest number of key pathways and the greatest embodied carbon emissions from critical paths, followed by “R27 India” and “R22 United States.” These findings offer valuable insights for the development of regional emission reduction policies.