Sustainability
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2024
·Vol. 16
·期 5
·1945
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IF 3.3
Zhongming Wu,Jianxin Deng,Tuanwei Zhao,Yang Zhou,Yongfu Kang,Xiangxiang Bai,Fei Hong,Longfei Fu,Gensheng Li,Zhiyi Zhang,Weiming Guan
Rapid economic development and increased demand for mineral products in China have led to extensive extraction of various ores, resulting in significant environmental challenges associated with the generation of industrial solid waste, particularly iron tailings. Despite being a major mining nation, China faces issues of wasteful practices, with substantial amounts of valuable elements lost during the processing of iron ore. This study addresses the urgent need for sustainable solutions by proposing an innovative approach for the recovery of valuable elements from iron tailings. The proposed process involves a sequential application of acid leaching, chemical precipitation, and Metal-Organic Frameworks (MOFs) ion adsorption. The pre-treated iron tailings were leached in HCl solution with pH 1.5 at 70 °C for 2 h, and the co-leaching efficiency of 98.1% V, 98.2% Mo, 99.3% Fe, and 98.7% Mg was obtained. Chemical precipitation is then employed to isolate Fe, Mg V, and Mo and promote the formation of targeted compounds, ensuring concentration and purity. The integration of MOF ion adsorption, known for its high surface area and tunable pore structures, provides an efficient platform for selectively capturing and recovering target ions. 97.7% V and 96.3% Mo were selectively extracted from Zirconium 1,4-carboxybenzene metal-organic framework (UiO-66) adsorption system with pH 5.0 at 30 °C for 6 h, and 91.7% V and 90.3% Mo were selectively extracted from 2-methylimidazole zinc salt metal-organic framework (ZIF-8) adsorption system with pH 5 at 30 °C for 6.0 h. This three-stage process offers an efficient method for the recovery of valuable elements from iron tailings.
研究领域:
环境科学
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冶金工程
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高影响因子
Journal of Sustainable Metallurgy
·
2022
·Vol. 8
·期 3
·1117-1129
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IF 3.068
Lu Xingwen,Zhou Ceng,Liu Yuxin,Wang Yujie,Wang Fei
In this study, iron tailings were used as raw materials mixing with Al 2 O 3 , SiO 2 , and/or CaO sintered at 950–1400 °C to produce glass ceramics. In Al 2 O 3 /tailing and Al 2 O 3 /SiO 2 /tailing systems, the newly formed crystalline mullite (3Al 2 O 3 ·2SiO 2 ) reached its maximum content of 83.7 wt% for sample with Al 2 O 3 /SiO 2 /tailing mass ratio of 6/2/2. In Al 2 O 3 /SiO 2 /CaO/tailing system, the content of newly formed anorthite (CaAl 2 Si 2 O 8 ) increased to the maximum of 72.9 wt% for sample with Al 2 O 3 /SiO 2 /CaO/tailing mass ratio of 7/8/4/6 sintered at 1450 °C. The properties of glass ceramic products were significantly improved in samples with high content of crystalline mullite or anorthite and low surface porosity. Obtained glass ceramic in Al 2 O 3 /SiO 2 /tailing system with mass ratio of 6/2/6 showed excellent properties of chemical resistance (99.99%), compressive strength (1061.6 MPa), and low water absorption (0.2%). The high performance of glass ceramics and low leachability of hazardous metals shed light on the potential application of iron tailings in building and decorative materials. Graphical Abstract
研究领域:
材料科学
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环境科学
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Jian Jia,Mei-Ling Xu,Xiao-Jie Jiang,Li-Na Zhang,Xiao-Lei Lu,Jiang Zhu,Xin Cheng
The utilization of cement-stabilized iron tailings as pavement base necessitates rigorous scrutiny of heavy metal ion leaching, particularly under fluctuating environmental pH conditions. Given the insufficient capacity of cement to stabilize Cr(Ⅵ), this paper explores the integration of defect-engineered metal-organic frameworks (MOFs) as additives in cement-stabilized iron tailings to reduce Cr(Ⅵ) leaching. Results shows that the utilization of MOFs material mitigates Cr(VI) leaching in cement-stabilized iron tailings while enhancing their mechanical properties. The Cr(Ⅵ) leaching from samples with the addition of UiO-66-(OH)₂ and UiO-66-(OH)₂-D exhibited a substantial reduction of 60.2 % and 88.6 %, respectively. The stabilized mechanism is attributed to the strong affinity between Cr(Ⅵ) and hydroxyl groups in MOFs. Furthermore, UiO-66-(OH) 2 -D has a larger pore diameter to expose more hydroxyl groups, which greatly improves its adsorption performance for Cr(Ⅵ). Meanwhile, the unconfined compressive strength (UCS), splitting strength and compressive resilience modulus increased by 13.4 %, 35.1 % and 45.7 %, respectively. The mechanisms underlie that the MOFs enhanced the early hydration process and optimized of the pore size distribution within the solidified body. This study presents a viable and efficient approach for the sustained mitigation of Cr(Ⅵ) leaching within cement-stabilized iron tailings.
研究领域:
环境科学
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材料科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zhiyi Wang,Jiming Su,Jianchao Wang,Yijin Feng,Qianqian Xu,Hui Wang,Hongru Jiang
In the context of the ongoing advancements in high-performance chips, heat dissipation, and electromagnetic shielding within electrical and electronic equipment are becoming increasingly intricate. Plastics have garnered widespread usage in electrical and electronic equipment as prevalent framework materials. However, the challenge persists in achieving a unification of electromagnetic interference (EMI) shielding, thermal conductivity (TC), and electrical insulation performance for plastics. Herein, we capitalize on the styrene–butadiene–styrene (SBS) copolymer to integrate the merits of polymers and magnetic minerals. Utilizing pyrrhotite (Pyr) tailings and waste polystyrene (PS) as raw materials, a formable block material denoted as PS-S@SBS/Pyr has been formulated. This material exhibits commendable performance in terms of TC, electrical insulation, and EMI shielding performance concurrently. The bidirectional bridging effect of SBS effectively reduces the interfacial thermal resistance between PS and Pyr. The TC of PS-S@SBS/Pyr can reach a maximum of 1.36 W/m‧K with a resistivity greater than 10 8 Ω‧m. Moreover, PS-S@SBS/Pyr consistently demonstrates a stable EMI shielding effectiveness of 33.1 dB within the 8–12 GHz frequency range, with absorption shielding predominating as the underlying mechanism. This green preparation method makes efficient utilization of two main solid wastes while increasing the added value of the material.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Water Process Engineering
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2025
·
IF 6.7
Xiang Shao,Jun Zhong,Dong Xu,Xiaoyuan Ren,Han Zhou,Chenyu Wang
The utilization of solid waste to prepare biochar for pollutant adsorption has emerged as a promising strategy. This study innovatively engineered magnetic biochar (S 1 I 3 -HC 240 and S 3 I 1 -PC 800 ) via hydrothermal carbonization (HTC) and pyrolysis approaches using sewage sludge and iron tailings (IT) as dual precursors, and investigated their adsorption behaviors and underlying mechanisms for methylene blue (MB) removal. The incorporation of IT enhanced MB adsorption, achieving maximum adsorption capacities of 91.17 mg/g (S 1 I 3 -HC 240 ) and 82.30 mg/g (S 3 I 1 -PC 800 ), respectively. The adsorption processes followed the Elovich kinetic model and the Freundlich isotherm, indicating spontaneous and endothermic reactions dominated by chemosorption. The primary mechanisms involved in MB removal included electrostatic attraction, π-π interactions, hydrogen bonding, and surface complexation. Notably, HTC processing with IT promoted formation of oxygenic group and Fe 3 O 4 , strengthening hydrogen bonding and surface complexation. Conversely, in pyrolysis, IT enhanced electrostatic attraction and oxidative degradation by increasing nitrogen functional groups and generating Fe 0 . From both an energy consumption and adsorption performance perspective, the energy-efficient HTC technique offers a significant advantage for the preparation of magnetic biochar from solid waste, making it a promising approach for sludge resource utilization.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Chang Lu,Shilin Zhang,Jie Wang,Xiaoguang Zhao,Lu Zhang,Aidong Tang,Xiongbo Dong,Liangjie Fu,Huaming Yang
Solid waste and water pollution are global environmental problems that need to be urgently solved. Using industrial solid waste to treat organic pollutant wastewater might be a good strategy to solve two problems. Herein, iron tailings were used to prepare iron-containing mesoporous silica (MFS) materials under a one-step hydrothermal route. The as-prepared MFS showed excellent photocatalytic degradation efficiency and stability over a wide pH range for five typical organic pollutants. Further degradation test using tap water and Xiangjiang River water notably confirmed its practical application. Quenching and ESR experiments revealed radical (including sulfate (∙SO 4 − ), hydroxide ( · OH), and superoxide ( · O 2 − ) radicals) and non-radical (including single oxygen ( 1 O 2 )) pathways worked together in the MFS/PMS/vis system. The cost estimation of the waste-derived MFS materials indicated that the raw material cost could be reduced by $129.8 per kilogram compared to the conventional method. This strategy not only provides a possible solution to iron tailings solid waste problem, but also develops a benign approach to the design and preparation of heterogeneous catalysts. The as-prepared materials have great potential in wastewater treatment, and follow the idea of treating waste with waste to achieve sustainable development.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Hongyu Lu,Jin Wang,Xinyuan Zhan,Pengcheng Zhao,Zhilin Xie,Shaoping Wang,Zhengbo Yue
To increase the utilization rate of superfine iron tailings (SIT), a novel coal fly ash (CFA)/SIT-based three-dimensional printing geopolymers (CS-3DPG) were synthesized for high-value resource application of SIT. The optimal preparation parameters of CS-3DPG were sodium citrate of 0.4%, water-solid ratio of 38%, SiO 2 /Na 2 O molar ratio of 1 and alkali activator of 6%, with the compressive strength of 32.14 MPa. Besides, the yield stress and plastic viscosity (rheological properties) of CS-3DPG reached 284 Pa and 18.8 Pa·S, respectively. The sodium aluminum silicate hydrate (N-A-S-H) gels were identified as dominant hydration products by the selective chemical extractions. Microstructural analysis also successfully indicated that the retarder caused some CFA and SIT to be unreacted, resulting in the decrease of early compressive strength compared with CS-3DPG. Based on the full width at half-maximum (FWHM) values, kinetics of hydration and hydration kinetic contribution degree results, retarders effectually inhibited nucleation and growth (NG) and diffusion (D). The phase-boundary interaction (I) reaction played a major role after adding retarders. This work successfully reveals the early retarding mechanism of CS-3DPG, and provides the possibility of large-scale resource application of SIT-based 3DPG in 3D printing construction.
研究领域:
材料科学
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土木工程
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Linlin Hao,Jingshuang Yan,Jiaoying Guo,Nannan Wang,Ming Zeng
Swine wastewater is a type of highly turbid wastewater with extremly high concentration of COD, NH 4 + , and total phosphorus. To address the drawbacks of commercial coagulants in the pretreatment of swine wastewater, such as loose flocs, slow settling rates, and the inability to remove NH 4 + , a novel Mg-Fe-Al hybrid magnetic coagulant (Mg/Fe/Al-MC) is prepared by using the high-pressure acid leaching (HPAL) technology based on iron tailings waste. Compared to atmospheric acid leaching (AAL), HPAL significantly increased the iron leaching rate from 22 % to 61 %. The specific surface area was increased from 5.1 to 9.2 m 2 /g. The study revealed the synergistic crystallization-coagulation-adsorption mechanism for the purification of swine wastewater. When the dosage of Mg/Fe/Al-MC was 2.5 g/L and pH was 9.0, the removal efficiency of NH 4 + reached 60 % by forming magnesium ammonium phosphate (MAP). Zeta potential results indicated that the coagulation mechanism of Mg/Fe/Al-MC is primarily based on electrostatic neutralization. After maturing Mg/Fe/Al-MC for 60 h, the content of essential polymeric Fe-Al hydroxide complexes [Fe(III)+Al(III)](b) reached 22.7 %. The insoluble porous particles exhibited a significant adsorption capacity, suggesting its important role in pollutant removal. Under the action of an external magnetic field, the settling velocity of Mg/Fe/Al-MC was significantly faster than that of polyaluminum chloride (PAC), with a much higher clear water yield of 75.5 %. This study provides new pathway for the enhanced pretreatment of swine wastewater.
研究领域:
环境科学
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废水处理技术
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2023
·Vol. 30
·期 5
·1709-1724
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IF 2.6
Zhang Lu,Lu Chang,Dong Xiongbo,Yang Huaming
Magnetic silica materials are widely applied in biomedical and environmental fields, but the current synthesis of low-cost, rapidly adsorbed magnetic silica materials remains a challenge. Utilizing typical solid waste iron tailings as precursors of iron and silicon, magnetic silica microspheres with core-shell structures have been economically and effectively prepared by stepwise modulation through solvothermal and sol-gel methods. The characterization results demonstrate that magnetic silica microspheres have a core-shell structure with magnetic iron oxide as the core, dense silica as the middle layer and mesoporous silica as the shell. Furthermore, because the shell of magnetic silica microsphere is mesoporous silica, it has the characteristics of large specific surface area (963 m 2 /g), small pore size (2.57 nm) and pore volume (0.63 cm 3 /g) that mesoporous silica usually has. Additionally, the Congo red adsorption result indicated that the magnetic silica microsphere can reach adsorption equilibrium for Congo red within 2.5 min under acidic conditions, and can be recovered by magnets after adsorption. Due to the large specific surface, small pore size and pore volume characteristics of the shell of the microsphere, the adsorption of Congo red by the microsphere only occurs on the surface through hydrogen bonding, which shows rapid adsorption. Overall, the study not only provides a theoretical basis for the high-value utilization of iron tailings, but also offers a new strategy for the development of adsorbents for the ultra-rapid removal of Congo red adsorbent removal in emergency situations.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Hongyu Lu,Xinyuan Zhan,Zhengbo Yue,Zhilin Xie,Pengcheng Zhao,Wei Wang,Xiao He,Jin Wang
The large accumulation of superfine iron tailings (SIT) as solid waste may lead to significant environmental and safety risks, urgently requiring resource utilization. The preparation of geopolymers using SIT is high-valued and environmentally friendly method. Therefore, a low-cost, alkali-containing solid carbonate series accelerator (CSA) was used to accelerate the early geopolymerization process of coal fly ash (CFA)/SIT-based three-dimensional printed geopolymers (CS-3DPG). The optimal addition time and content of CSA were 25 min and 6 %, respectively, which significantly shortened the setting time of CS-3DPG to 9 min and increased its early compressive strength to 24.18 MPa. The addition of CSA enhanced the rheological properties of CS-3DPG, improving its printability and buildability. These results provide assurance for achieving rapid prototyping of CS-3DPG. Combined with microscopic characterization, selective chemical extractions (SCE) and isothermal conduction calorimetry (ICC), CSA effectively promoted the CS-3DPG geopolymerization reaction process, transitioning from interactions at the phase boundary (I) to diffusion (D). Additionally, the CO 2 emissions of CS-3DPG were reduced by 76 % compared to Ordinary Portland Cement (OPC). This study successfully reveals the role and impact mechanism of CSA in 3DPG, providing an important theoretical reference for regulating 3DPG buildability.
研究领域:
材料科学
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环境科学
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土木工程
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高影响因子
International Journal of Environmental Research
·
2025
·Vol. 19
·期 6
·1-19
·
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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高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
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2014
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IF 1.153
Liu Shao-jie,Liu Hong-jie,Li Pei-xin,Zhao Feng-qing
In this paper, the core-shell poly (styrene-hydroxyethyl methacrylate) copolymer was synthesized by emulsifier-free emulsion polymerization. The microstructure of the polymer was characterized by fourier transform infrared spectrum, scanning electron microscope (SEM), and the laser particle size analyzer. Using it as the modifier, iron tailings as the aggregate and eco-cement as the cementing material, a new adhesion mortar was prepared. Results showed that the core-shell cross-linked poly (styrene-hydroxyehyl methacrylate) could substantially improve the modified-mortar’s bond strength compared to the mortar with commercial EVA as the modifier. SEM images of the modified mortar illustrated that the polymer may have three effects: (1) partially obstructing the fine pore network inside of hydrates; (2) filling the large pores; and (3) forming membranes. All these effects improve the mortar’s adhesion properties combinedly.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）