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Use of forestry waste as an alternative raw material for generating metallurgical coke

Journal of Iron and Steel Research International 2025年第1期32卷 25-39页

作者： Lin-bo Qin Wei Qin An-yi Wang Ling Shi Jun Han College of Resources and Environment Engineering Wuhan University of Science and TechnologyWuhan430081HubeiChina Hubei Key Laboratory of Industrial Fume and Dust Pollution Control Jianghan UniversityWuhan430056HubeiChina Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan University of Science and TechnologyWuhan430081HubeiChina

Forestry waste(FW)is a significant renewable energy source in *** substitution of coal blends(BC)with forestry waste to produce metallurgical coke was investigated aiming at expanding alternative resources and reducing CO_(2)emissions in ironmaking *** BC with different ratios of FW were carbonized in a fixed bed reactor,and the physicochemical structure of the coke derived from FW/BC co-carbonization was characterized by Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,solid-state^(13)C nuclear magnetic resonance,optical microscopy,and scanning electron *** results reveal that the suitable incorporation of FW in BC is 10 wt.%,and the index of coke quality exhibits a good correlation with the optical anisotropy index and the aromaticity of the as-obtained *** partial substitution of BC with FW exhibits potential benefits for colloid formation,owing to the higher hydrogen in ***,as the substitution ratio of BC with FW increases,it inhibits coke agglomeration due to more tortuous stacked structures formation during volatile releasing ***,it was identified that the substitution of higher BC ratios with FW results in the partial replacement of aromatic carbons by oxygenlinked carbons and aliphatic *** substitution leads to a reduction in the aromaticity of the as-obtained coke.

关键词： Metallurgical coke Forestry waste Coal blend Co-carbonization Chemical structure

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Removal of hexavalent chromium from groundwater using Shewanella oneidensis MR-1 modified micron-sized zero-valent iron to enhance the Kirkendall effect

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Chemical Engineering Journal 2025年 514卷

作者： Xi, Lv Xincheng, Xu Yang, Peng Bolin, Li Lie, Yang Xiaoman, He Hubei Key Laboratory of Mineral Resources Processing and Environment School of Resources and Environmental Engineering Wuhan University of Technology Wuhan430070 China

This study introduces a novel modification method for micron-sized zero-valent iron, utilizing Shewanella oneidensis MR-1 to simultaneously colonize its surface, disrupt the passivation layer, and alter the crystal structure of the core. This process yields a composite that retains its reducing activity even in high concentrations of pollutants (500 ppm Cr(VI)) and under neutral to slightly acidic conditions. Our findings indicate that the modified system induces the Kirkendall effect in zero-valent iron, leading to the formation of amorphous zero-valent iron with a non-spherical core structure, in contrast to conventional direct mixing approaches. The modified system achieves complete reduction of 100 ppm Cr(VI) to Cr(III) within 8 h. Notably, within the first 4 h of reaction, the reduction rate is approximately three times higher than that of the conventional direct mixing system. XPS, XRD, SEM, EEM and TEM analyses reveal that the surface passivation layer of the biochemically modified zero-valent iron is disrupted, leading to changes in its crystal structure, the formation of hollow spherical structures, and the development of a biological protective film on its surface. Interestingly, electrochemical and ETSA analyses indicate that the electron transfer rate of the biochemically modified composite is significantly enhanced. This study provides fundamental insights into the removal of Cr(VI) from groundwater using biochemically modified micron-sized zero-valent iron (mZVI). © 2025 Elsevier B.V.

关键词： Crystal lattices

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An overview of the water quality of China's key freshwater and marine resources

International Journal of Energy and Water Resources

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International Journal of Energy and Water resources 2025年 1-21页

作者： Musah, B.I. Peng, Lai CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Menglun 666316 China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China School of Resources and Environmental Engineering Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China

Water pollution has emerged as a significant challenge in China, primarily driven by various human activities. Consequently, accessing clean and safe drinking water remains a pressing issue for segments of the population. This study, therefore, investigates the water quality of the seven major rivers and four major seas in China between 2005 and 2019. The findings indicate that the primary pollutants in the critical freshwater and marine ecosystems were chemical oxygen demand, biological oxygen demand, ammonia nitrogen, permanganate index, petroleum, and total phosphorus. The analysis revealed that from 2007 to 2015, China's total wastewater and chemical oxygen demand discharge amounted to 581.9 billion metric tons and 170.13 million metric tons, respectively. The multiple regression analysis demonstrated strong linear relationships between the predictor variables chemical oxygen demand, NH₃-N, petroleum, total phosphorus, and wastewater in the Bohai (R² = 0.94, p = 0.03), Yellow (R² = 0.97, p = 0.003), and East China Seas (R² = 0.94, p = 0.033). Additionally, the Yellow Sea exhibited strong positive correlations between total phosphorus and NH₃–N (r = 0.96), chemical oxygen demand and petroleum (r = 0.94), and chemical oxygen demand and NH₃–N (r = 0.91). Similarly, the South China Sea showed robust positive correlations between chemical oxygen demand and NH₃–N (r = 0.98), chemical oxygen demand and total phosphorus (r = 0.97), and chemical oxygen demand and petroleum (r = 0.94). This study provides a solid foundation for harmonizing water quality assessment criteria and guiding future investigations, policy formulation, and implementation strategies. © The Author(s), under exclusive licence to Iranian Society of environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University 2025.

关键词： Ammonia nitrogen And marine ecosystems Chemical oxygen demand Freshwater Wastewater discharge Water pollution Water quality

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An Enhanced Dual-Layer Ensemble Framework for Porosity Prediction Utilizing Conventional Well Logging Data

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Journal of Earth Science 2025年

作者： Lu Qiao Shengyu Yang Qinhong Hu Huijun Wang Taohua He National Key Laboratory of Deep Oil and Gas， China University of Petroleum (East China) Laboratory for Marine Mineral Resources， Qingdao National Laboratory for Marine Science and Technology Hubei Key Laboratory of Petroleum Geochemistry and Environment (Yangtze University)， Yangtze University

Porosity is the one of the most fundamental and critical parameters for reservoir characterization and is closely related to the hydrocarbon storage capacity. The interpretation methods of conventional well logs have poor generalization capabilities to achieve the desired accuracy in porosity prediction. The increasing adoption of machine learning has ameliorated this predicament to some extent， but it remains difficult to reconstruct the complex and nonlinear relationship between logging responses and porosity by relying on individual machine learning models alone. This work proposes a two-layer model ensemble framework to predicte porosity， which includes base regressors in the first layer and meta regressor in the second layer. The results indicate that the Light Gradient Boosting Machine (LightGBM) - Categorical-Features Gradient Boosting (CatBoost) ensemble model provides the highest prediction accuracy for the given dataset and is applied for porosity evaluation at other logged depths. This work also points out that the base regressor should be accurate and complex， while the structure of the meta-regressor should be simple in order to achieve the desired performance. Furthermore， the proposed model ensemble framework is versatile and applicable to reservoir evaluation， engineering development， and other potential fields due to its effectiveness and convenience.

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Removal of Hexavalent Chromium from Groundwater Using Shewanella Oneidensis Mr-1 Modified Micron-Sized Zero-Valent Iron to Enhance the Kirkendall Effect

SSRN

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SSRN 2025年

This study introduces a novel modification method for micron-sized zero-valent iron, utilizing Shewanella oneidensis MR-1 to simultaneously colonize its surface, disrupt the passivation layer, and alter the crystal structure of the core. This process yields a composite that retains its reducing activity even in high concentrations of pollutants (500 ppm Cr(VI)) and under neutral to slightly acidic conditions. Our findings indicate that the modified system induces the Kirkendall effect in zero-valent iron, leading to the formation of amorphous zero-valent iron with a non-spherical core structure, in contrast to conventional direct mixing approaches. The modified system achieves complete reduction of 100 ppm Cr(VI) to Cr(III) within 8 hours. Notably, within the first 4 hours of reaction, the reduction rate is approximately three times higher than that of the conventional direct mixing system. XPS, XRD, SEM, and EEM analyses reveal that the surface passivation layer of the biochemically modified zero-valent iron is disrupted, leading to changes in its crystal structure, the formation of hollow spherical structures, and the development of a biological protective film on its surface. Interestingly, electrochemical and ETSA analyses indicate that the electron transfer rate of the biochemically modified composite is significantly enhanced. This study provides fundamental insights into the removal of Cr(VI) from groundwater using biochemically modified micron-sized zero-valent iron. © 2025, The Authors. All rights reserved.

关键词： Groundwater pollution

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Volcanic rocks in the 21st century: Multifaceted applications for sustainable development

Green Technologies and Sustainability

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Green Technologies and Sustainability 2025年第2期3卷

作者： Yang, Hang Diao, Hongli Xia, Shibin Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of Technology Wuhan 430070 China

Volcanic rocks, with their diverse physicochemical properties, are pivotal in numerous scientific and industrial applications. This review comprehensively examines the multifaceted uses of volcanic rocks, focusing on their roles in sustainable construction, environmental remediation, and industrial catalysis. Volcanic materials like basalt and pumice enhance the durability and thermal efficiency of construction materials, while their porous structures facilitate the adsorption of pollutants in environmental applications. Additionally, their catalytic properties are harnessed in various industrial processes, promoting cleaner production techniques. This review synthesizes current research and explores future innovations, emphasizing the potential of volcanic rocks to contribute to sustainable development and technological advancement. The integration of volcanic rocks in sustainable practices highlights their role in promoting ecological balance and resource efficiency. The findings underscore the significance of interdisciplinary approaches in leveraging volcanic rocks for eco-friendly and economically viable solutions, demonstrating their potential to address global challenges through innovative applications and future research directions. © 2025 The Authors

关键词： environmental remediation Green catalysis Sustainability Sustainable construction Volcanic rocks

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Calculation method of bench blasting powder factor based on rock dynamic fragmentation energy consumption density

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Bulletin of Engineering Geology and the environment 2025年第6期84卷 1-18页

作者： Ye, Haiwang Li, Rui Li, Xingwang Yu, Menghao Lei, Tao School of Resources and Environment Engineering Wuhan University of Technology Wuhan430070 China Ministry of Education Key Laboratory of Key Non-Metallic Mineral Resources Green Utilization Wuhan430070 China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of Technology Wuhan430070 China GuiYang Engineering Corporation Limited Guiyang550081 China

In order to study the relationship between rock mass dynamic parameters and blasting parameters, a calculation model of graphite ore bench blasting powder factor considering rock dynamic fragmentation energy consumption density is established based on dimensional analysis method. The dynamic compression tests of five types graphite ores with different grades under different impact pressure were designed and carried out with split Hopkinson pressure bar (SHPB) test system, combining with crushing screening tests, the reasonable range of strain rate and energy consumption density were obtained when the specimens were crushed. Through the field blasting test of Yunshan graphite mine in Luobei County, China, the reasonable powder factor of ore rock with different grades were explored. It is found that there is a Boltzmann-function relationship between the reasonable powder factor and 1/2 power of reasonable energy consumption density of ore rock dynamic fragmentation, and the calculation formula of powder factor is established accordingly. In practical mine production blasting, the powder factor values calculated with this formula highly satisfy the demands of the mine rock blasting, which verified the rationality and reliability of the functional relationship between the powder factor and energy consumption density. © The Author(s) 2025.

关键词： Bench blasting Dimensional analysis Energy consumption density Powder factor SHPB

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Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin Wu Wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

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Improving soil properties and microbial communities in copper tailings using montmorillonite-based Chlorella gel beads

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Science of the Total environment 2025年 974卷 179232页

作者： Wang, Zhen Tan, Jiaqi Wu, Chenyu Xia, Ling Song, Shaoxian Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of Technology Luoshi Road 122 Hubei Wuhan430070 China School of Resources and Environmental Engineering Wuhan University of Technology Luoshi Road 122 Hubei Wuhan430070 China

Copper tailings are the waste left over from copper ore dressing, and their massive pose severe challenges to the ecosystem. In this study, sodium alginate-Chlorella-montmorillonite (SCM) gel beads were prepared by combining sodium alginate, Chlorella, and montmorillonite. The laboratory pot and in-situ field experiment results indicated that the input of SCM gel beads facilitated the formation of larger particle-size soil aggregates and enhanced soil water retention and cation exchange capacities. The pot experiment demonstrated that the application of MMT and Chlorella significantly increased organic carbon content in the tailing soil. The field experiment showed that the application of SCM gel beads at the optimal dosage of 700 g/m2 increased the plant height and fresh weight by 1.77 and 1.22 times, respectively, as well as the chlorophyll content. Furthermore, in SCM group, the proportion of large soil aggregates(particle size >0.25 mm) was increased by 6.66 %, and the R0.25, mean weight diameter (MWD), and geometric mean diameter (GWD) values were also significantly increased, and the increase in large soil aggregates and aggregate stability indicated the improvement of soil structure. Additionally, the dominant microorganisms at the phylum level were Proteobacteria, Acidobacteriota, and Bacteroidota, while they were Sphingomonas, Vicinamibacteraceae, and Candidatus at genus level. These dominant microorganisms were indigenous species to copper tailing. The alpha diversity determination results indicated that SCM gel bead input increased the microbial community richness, but had little effect on their diversity. Our results demonstrated that as soil amendment, SCM gel beads stimulated the growth of tailing native microorganisms, increasing their richness. Overall, the combination of Chlorella, and montmorillonite, as an amendment, improved soil properties of copper tailing and soil microbial community structure. Our findings provide valuable references for deve

关键词： Copper ore treatment

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Spatiotemporal evolution of Ediacaran-Cambrian(ca.551–523 Ma)sponges in South China and their simulated contributions to marine oxygenation

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Science China Earth Sciences 2025年第2期68卷 549-563页

作者： Yan YE Lei ZHANG Can CHEN Shan CHANG Yuhao YI Qinglai FENG State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China School of Earth Science China University of GeosciencesWuhan 430074China Department of Geology Lund UniversityLund 22362Sweden Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of TechnologyChengdu 610059China Second Geological Brigade of Hubei Geological Bureau Enshi 445000China College of Urban and Environmental Sciences Hubei Normal UniversityHuangshi 435002China Exploration and Development Research Institute SINOPEC Jianghan Oilfield CompanyWuhan 430223China

The origin and evolution of sponges have attracted interest,not only because they are among the most basal metazoans,but also because they act as important ecological engineers in the *** research suggested that sponge groups diversified quickly during the Cambrian Series 2,while Terreneuvian sponge fossils are conspicuously rare and poorly ***,an increasing number of sponge spicules have been reported from the Ediacaran-Cambrian(E-C,ca.551–523 Ma)transitional carbonates/cherts worldwide,particularly in South China,which calls for updated *** oxygenation has been widely proposed to play a critical role in organismal evolution,but its relationship with sponges is unclear and falls into a“chicken-egg”*** this study,we summarize reported sponge spicule distributions from five E-C sections in South China to investigate the early evolutionary pattern of siliceous *** to current stratigraphic correlation,monaxons first appear in the late Ediacaran in the intrashelf basin-slope area,and then potentially expand to the continental shelf and deep basin in the lower *** these sections,the abundance,size,and diversity of monaxons increase upwards,followed by the appearance of diaxons,triaxons and then *** the uncertain affinity of the sponge fossils,it is possible that siliceous hexactinellids evolved later than siliceous demosponges,given that the earliest spicule assemblages are exclusively composed of monaxons,which commonly form bundles comparable to modern *** geochemical data from the Sifangjing section,Guizhou Province and the Yanziqiao section,Hunan Province,South China show that the appearance of sponges usually corresponds to anoxic *** addition,we applied the recently proposed Biological Pump,Oxygen and Phosphorus(BPOP)model to trace the evolution of oceanic oxygen concentrations with the radiation of *** results indicate that the possible contribution o

关键词： Cambrian Sponge Oxygenation Silicon concentration Box model

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