CONSTRUCTION AND BUILDING MATERIALS
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2017
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IF 3.169
Changzai Ren,Wenlong Wang,Guolin Li
Sulfoaluminate cement exhibits a good dimensional stability, an early strength, a high strength, a high resistance to chemical attack (from seawater, sulfates and chlorides), a low energy consumption and low carbon-dioxide emissions during production. However, sulfoaluminate cement factories traditionally use limestone, bauxite and gypsum as materials, which places significant pressure on these natural resources. This study aimed to investigate the feasibility of substituting traditional raw materials with industrial solid wastes in sulfoaluminate clinker production. It was achieved by sintering a mixture of industrial solid wastes (coal gangue: 8%–15%, flue gas desulfurization gypsum: 25%–35%, aluminum slag: 30%–35%, carbide slag: 30%–35%) at 1150–1300 °C. The mineralogical composition of the clinker was C 4 A 3 S ‾ , C 2 S and C 4 AF. The compressive strength of hydrated specimens reached as high as 75 MPa after a 28 d curing. This research provides a feasible and promising way to produce high-value products using industrial solid wastes and may promote their large-scale utilization.
研究领域:
建筑材料
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环境科学
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资源循环利用
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产品关联
DOI
高影响因子
International Journal of Environmental Research
·
2025
·Vol. 19
·期 6
·1-19
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IF 3.5
Zhang Wen-hao,Wei Yu,Yu Qi,Wang Chun-heng,Lei Xue-fei,Luo Shao-hua,Chen Huan-huan,Mu Wen-ning
Phenol, as a representative organic pollutant in industrial wastewater, poses a critical challenge for environmental remediation. In this study, titanium-doped iron tailings-based heterogeneous catalysts (Ti/PCG) with enhanced electron transfer kinetics were synthesized via a high-temperature sintering method and evaluated for their photo-Fenton degradation efficiency toward phenol. The Ti/PCG catalysts were systematically characterized via SEM, BET, XPS, and photoelectrochemical analyses to elucidate their structural and electronic properties. Results indicated that 15% TiO 2 -doped Ti/PCG exhibited optimal properties, including the largest specific surface area, well-developed hierarchical pore structures, superior charge transfer capacity, and high carrier separation efficiency. Under optimized conditions (pH = 2.75, 0.2 ml H 2 O 2 (30 wt%), and 1 h light irradiation), the 15% Ti/PCG achieved 80.68% removal of phenol (initial concentration: 100 ppm). Mott-Schottky and VB-XPS analyses confirmed the n-type semiconductor behavior of the 15% Ti/PCG, with a conduction band (E CB ) at − 0.455 eV and a valence band (E VB ) at 2.09 eV, enabling the proposal of a plausible photo-Fenton degradation mechanism. Radical trapping experiments further demonstrated that hydroxyl radicals (·OH) and superoxide radicals (·O 2 − ) dominated the phenol degradation process. This work provides an optimized photo-Fenton strategy for phenol-laden wastewater treatment with 80.68% degradation efficiency, while demonstrating the potential of industrial solid wastes as sustainable catalysts in environmental remediation.
研究领域:
环境科学
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催化化学
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水污染控制
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材料科学
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可持续技术
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工业生态学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-18
·
IF 2.8
Wang Bo,Li Yue,Lv Yan,Wang Xuchao,Gao JiaAi,Wang Hui
A unique core–shell structured pitch-pyrolyzed carbon-coated porous Si/SiO x /needle coke (Si/SiO x / NC@C) nanocomposite has been successfully synthesized via a low-temperature aluminothermic reduction combined with a scalable spray-drying and following carbonization processes. The fabrication of silicon-based materials in Si/SiO x /NC@C nanocomposites derived from high silica-containing silica fume powders enables effective utilization of industrial solid waste. The Si/SiO x nanoparticles in Si/SiO x /NC@C with abundant internal nanovoids are anchored on the surface of needle coke matrices, forming Si/SiO x -needle coke dual-phase cores, which are wrapped by a thin pitch-pyrolyzed amorphous carbon layer. The synergetic combination of these inherent advantages, such as high electroconductivity, porosity, amorphous/crystalline mixture structure, and high-valence SiO x residues, remarkably enhances the composite’s structural stability and buffers internal structure stress induced by alloying/dealloying of Si. The Si/SiO x /NC@C nanocomposites demonstrate exceptional electrochemical stability, exhibiting a specific reversible capacity of 771.5 mAh g⁻ 1 with minimal capacity decay (~ 0.06% per cycle) over 500 cyclic repetitions at an elevated current density of 200 mA g⁻ 1 . Rate capability tests show that the Si/SiO x /NC@C nanocomposites achieve a high capacity of 660.25 mAh g −1 even when subjected to the highest current of 3200 mA g −1 . More notably, this work provides a facile and promising economical route for the scalable industrial production of high-performance Si-needle coke anode materials for future LIBs from industrial solid waste.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mingkun Bao,Zhenhao Wang,Chaoyi Li,Tianming Li,Chaoran Fan,Na Yan,Yian Zheng
Coal gasification fine slag (CGFS) is a carbon-rich industrial solid waste featured with rough, porous surface and abundant inorganic minerals, facing significant utilization challenges. This study systematically investigated the potential of CGFS as a mineral carbon-based catalyst to activate peroxydisulfate (PDS) for degrading binary bisphenol A (BPA) and tetrabromobisphenol A (TBBPA). Under optimal conditions of 0.10 g/L PDS, 0.20 g/L CGFS, pH 7.0 and 30 °C, the CGFS-activated PDS system completely degraded binary BPA and TBBPA within 2 h, achieving a mineralization efficiency of over 53.8%. The presence of polar groups and defects in CGFS was beneficial for its adsorption, while surface moieties such as oxygen-containing functional groups and graphite carbon domains mediated PDS activation. The catalytic degradation process involved radical (•OH, SO 4 •- and O 2 •- ) and non-radical ( 1 O 2 ) pathways, which substantially contributed to the transformation of binary contaminants. Liquid chromatography-mass spectrometry identified degradation intermediates, and ECOSAR assessment indicated their lower ecotoxicity compared to the parent compounds. The practical biotoxicity of the degradation system was tested using Escherichia coli . Heat treatment effectively regenerated CGFS for reuse, and its good adaptability to actual water bodies demonstrated its great potential for practical application. This study elucidates the simultaneous degradation mechanism of BPA and TBBPA via CGFS-activated PDS system. This pioneering approach offers a cost-effective solution to treat BPA/TBBPA-containing wastewater and opens up new possibilities for CGFS recycling.
研究领域:
环境科学
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环境工程
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化学工程
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工业生态学
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污染物控制化学
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废物资源化
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催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）