NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7256-7264
·
IF 2.7
Hele Hua,Jing Yang,Rui Li,Yunfang Wang,Caimei Fan,Jianxin Liu,Yawen Wang
Resourceful utilization of coal gasification fine slag (CGFS), a typical coal-based solid waste, has always been a trial and challenge in solid waste treatment. In developing its utilization value, fewer steps and lower energy consumption during treatment are more favorable. Herein, CGFS was modified by combining BiOBr to develop its possible application in the photocatalytic degradation of organic pollutants. The BiOBr/CGFS photocatalysts were synthesized at ambient temperature by a simple hydrolysis method with zero pre-treatment of CGFS. The synthesized composites show improved effective photocatalytic performance in the degradation of organic pollutant and the BOB/CGFS20 showed the best activity, which can remove 89.3% of phenol within 90 minutes, 84.53% of sulfamethoxazole within 75 minutes and 84.96% of bisphenol A within 120 minutes. Moreover, the components in CGFS that may play a positive role were investigated and the results showed that CGFS acted as a carrier, and most likely, the carbon materials and metal oxides such as Fe2O3 and/or TiO2 in it led to the improvement of the quantum efficiency of BiOBr and further promoted the photocatalytic performance. This study aims to provide some references and inspiration for the utilization of CGFS and environmental protection.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xu Zhao,Weixing Li,Xiaorong Zhang,Yingfang Xue,Jingbo Mu,Dongfang Xu,Weipeng Li,Yanming Wang,Shenjun Qin,Zhixiao Zhang
Lightweight ceramic proppants are prepared using coal gangue, fly ash, and bauxite as raw materials, and a mixture of manganese dioxide and magnesium oxide is used as composite additives. The total content of the coal gangue and fly ash in the raw materials reaches up to 70 wt%. The effects of coal gangue and fly ash precalcination, sintering temperature, and composite additive content on the phase compositions, microstructures, and performances of the resulting ceramic proppants are studied in detail. The ceramic proppant prepared at 1285 °C using 1 wt% of the composite additive is composed of quartz, corundum, and mullite. It also presents the desired sphericity, roundness, and microstructure. The apparent density, bulk density, and breakage ratio of the ceramic proppant described above are 2.55 ± 0.06 g/cm 3 , 1.03 ± 0.02 g/cm 3 , and 8.30 ± 0.68% at 35 MPa, respectively. This ceramic proppant belongs to lightweight ceramic proppants and meets the requirement of the 5K grade in the standards of SY/T 5108-2014 and API STD 19C-2018.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Yanjie Niu,Jie Xu,Liqing Chen,Sixi Guo,Fanhui Guo,Yixin Zhang,Jianjun Wu
As a typical coal-based solid waste, coal gasification fine slag (GFS) will have an annual discharge of more than 50 million tons in 2025 in China alone. However, the difficulty of its resource utilization lies in the precise separation of carbon and ash due to their complex distribution pattern. There is an urgent need to develop GFS-based materials for comprehensive utilization of carbon and ash. In this study, a combined process of acid leaching and pyrolysis was designed, in which active metal iron was leached from ash and immobilized on the surface of residual carbon in the form of Fe-N-C. The unique structure of Fe-N doped carbon/ash synergistically improved the efficiency of electrocatalytic degradation of organic wastewater by 72.78 ± 1.37%. The hierarchical porous structure of residual carbon considerably enhanced the accessibility of ash catalytic sites. Abundant ash defects and Fe-N active sites promoted the conversion of free radical precursors to reactive oxygen species (ROS). The removal rate of various organic wastewater within 35 min reached more than 100 ± 1.83% %, with excellent electrocatalytic performance and pH adaptability. Fe-NCPE had a high specific surface area (318.36 m 2 ·g −1 ), orderly graphite phase (002 crystal surface size 1.3 nm), and abundant catalytic sites. We also proposed the catalytic mechanism by combining molecular simulation with experiments. The high adsorption capacity above 24.07 ± 0.12 mg·g −1 ensured the continuous and rapid supply of pollutants and H 2 O 2 near the catalytic site·H 2 O 2 was converted into ROS mainly composed of hydroxyl groups through the valence state change of aluminum or Fenton-like reaction of nitrogen-linked iron. The ROS then attacked organic molecules to degrade pollutants. The above two processes corresponded to two cyclic catalytic reactions. Therefore, this study provides an innovative and promising approach for comprehensive utilization of carbon and ash in GFS.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yi-Hong Wu,Wei Guo,Yu-Zhu Sun,Shu-Ying Sun
Coal-based solid waste, as a secondary resource, contains significant quantities of aluminum, silicon, and lithium resources. The desilication solution is a waste solution with low concentrations of lithium ions, which is produced during the resource utilization process of coal-based solid waste. Developing adsorbents with high lithium selectivity and alkaline stability is important for the recovery of lithium in coal-solid waste alkaline leachate. In this study, resin functionalized with 2-hydroxymethyl-12-crown-4 (2H12C4) is prepared by esterification. The reaction conditions, including resin type, reaction temperature, time, and catalyst dosage, are optimized. The selective adsorption of 2H12C4-D113 is evaluated in a simulated desilication solution. The results show that 2H12C4-D113 with high selectivity for Li + adsorption is successfully synthesized at 1 g of 2H12C4 per g of resin, 110 ℃ reaction temperature, 6 h reaction time, 0.5 g of catalyst per g of resin and 1 mol of anhydrous lithium chloride per mol of 2H12C4. The adsorption rate of the 2H12C4-D113 resin is relatively rapid, and its adsorption kinetics satisfy the proposed second-order kinetic curve, and its Li + adsorption capacity is greatly influenced by Li + concentration. The peaking adsorption capacity of this resin is 58.71 mg/g in pure lithium solution (Li + =200 mg/L) with high alkalinity, and the peaking adsorptive capacity is 9 mg/g in the pre-desilication solution (Li + =274 mg/L, Na + =101 g/L). Furthermore, density functional theory (DFT) is utilized to study the selective adsorption mechanisms, geometrical characteristics, and thermodynamic parameters of the complexes between crown ether and different ions. DFT simulation reveals that 2H12C4-D113 has high selectivity for Li + adsorption with a Li + -O bond length of 1.86–1.88 Å, and an adsorption energy of 2H12C4-Li + (−369 KJ/mol) being the highest among the mental ions.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yilong Zhang,Zhenwei Yan,Mengdan Huo,Yanxia Guo,Yajun Li,Jian-ming Gao
Under the dual carbon background, the performance enhancement and application promotion of phase change materials (PCMs) hold significant practical importance. The research specifically examines the influence of pore structure and surface functional groups on structure and thermal properties of composite phase change materials (CPCMs) using coal-based solid waste-derived mesoporous silicon as carrier for polyethylene glycol (PEG) encapsulation. Complex multilevel porous silicon-based materials were synthesized through mineral phase regulation and acid etching techniques, while regular porous structures were created using cetyltrimethylammonium bromide (CTAB) as templating agent, and the pore architectures and surface functionalities were characterized and analyzed through SEM (Scanning Electron Microscopy), BET (Brunauer-Emmett-Teller), and FTIR (Fourier Transform Infrared Spectroscopy). The results demonstrate that complex porous materials exhibited enhanced thermal performance with increased pore size (1.22 nm) and volume (0.354/cm −3 ·g −1 ), whereas regular porous variants showed no thermal activity until amino-group functionalization. Post-modification, the functionalized regular porous materials achieved an enthalpy of 90.25 J·g −1 with crystallinity >90 %, confirming the co-regulatory effects of pore geometry and surface chemistry on PEG crystallization. These findings advance phase change materials (PCM) optimization strategies and coal waste valorization approaches, supporting energy storage material innovation for low-carbon development.
研究领域:
材料科学
·
能源化学
·
环境工程
·
无机非金属材料
·
热能存储
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 14
·2044
·
IF 4.7
Xu Li,Yang Liu,Mingyi Li,Sitong Zhang,Lan Jia,Fengbo Zhu,Wenwen Yu
This study aims to provide a high-value and environmentally friendly method for the application of coal-based solid waste. Modified fly ash/polyurethane (MFA/PU) and modified coal gangue powder/polyurethane (MCG/PU) composites were prepared by adding different contents of MFA and MCG (10%, 20%, 30%, 40%). At the filler content of 30%, the compressive strengths of MFA/PU and MCG/PU are 84.1 MPa and 46.3 MPa, respectively, likely due to an improvement in interface compatibility, as indicated by scanning electron microscopy (SEM). The MFA/PU and MCG/PU composites present their highest limiting oxygen index (LOI) values of 29% and 23.5%, respectively, when their filler content is 30%. MFA has advantages in improving the LOIs of composites. Cone calorimetry (CCT) and SEM demonstrate that the two composites exhibit similar condensed-phase flame-retardant behaviors during combustion, which releases CO2in advance and accelerates the formation of a dense barrier layer. Compared with the MFA/PU composites, the MCG/PU composites could produce a more stable and dense barrier structure. Water quality tests show that heavy metals do not leak from FA and CG embedded in PU. This work provided a new strategy for the safe and high-value recycling of coal-based solid waste.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 237
·期 5
·287
·
IF 3
Wang Song,Zhang Wenjun,Liu Zhihao,Wu Feng,Li Qiang
Residues of Tetracycline hydrochloride (TCH) in water can cause monumental damage to the environment and human health. Accumulating and landfilling decarbonized coal gasification fine slag (DGFS) leads to the waste of resources and environmental pollution. Based on the principle of Treating Waste with Waste, a Fenton-like catalyst (DAPC) for the catalytic degradation of TCH in water was prepared using DGFS as raw material by one-step acid leaching. The composition, micromorphology and surface functional groups of DGFS and DAPC were analyzed, and the catalytic degradation effect and cycling performance of DAPC catalyst on TCH were investigated. The results showed that the specific surface area of DAPC is 191.20 m 2 /g, which is nearly 40 times higher than that of before acid leaching. The presence of abundant polar functional groups, such as hydroxy and siloxy, on the surface of the catalyst provides active sites that facilitate the adhesion of TCH to the DAPC catalyst surface.. The degradation efficiency of TCH was 88.30% after 3 h under the optimal conditions (DAPC: 5 g/L, H 2 O 2 : 2 mL) and 83.68% of the initial value after four cycles, demonstrating excellent catalytic and cycling performance. Using DGFS as the raw material for a Fenton-like catalyst can reduce production costs, enhance catalyst activity and prevent iron sludge pollution. This study presents a new approach to treating TCH pollutants and utilising DGFS effectively. In the future, we can modify the surface of DAPC to improve its catalytic efficiency and explore its general applicability by using it to degrade other pollutants in water.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）