DESALINATION
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2018
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IF 6.603
Xianfu Chen,Xingyin Gao,Kaiyun Fu,Minghui Qiu,Feng Xiong,Dong Ding,Zhaoliang Cui,Zhaohui Wang,Yiqun Fan,Enrico Drioli
A porous ceramic membrane without water wetting is essential for the application of water desalination in membrane distillation . In this study, we report a hydrophobic tubular asymmetric alumina membrane that was modified by grafting hexadecyltrimethoxysilane (C16) molecules. The grafting efficiency and hydrophobicity of the grafted membrane were characterized by its morphology, contact angle and FTIR spectrum, as well as the changes in terms of nitrogen permeance and pure water flux over various pressures. Four kinds of tubular asymmetric alumina membranes were employed in the vacuum membrane distillation (VMD) process. The effects of membrane thickness and pore size on the water flux or salt retention were investigated. The mass transport resistance in substrate was non-negligible and sometimes could be the main contributor to the total mass transport resistance. The membrane with a top layer thickness of 20 μm, pore size of 150 nm and support pore size of 3.2 μm was appropriate in the VMD process. After >1000 min desalination , the permeate flux and salt rejection were maintained as high as at the beginning, i.e., approximately 30 kg·m −2 ·h −1 and 99.9%, respectively.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
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IF 5.302
Dehua Liang,Jiguang Huang,Yuntao Zhang,Zheng Zhang,Haiping Chen,Heng Zhang
In this paper, in order to reduce the preparation cost of high-performance ceramic membrane , coal fly ash-based tubular ceramic membrane for flue gas moisture recovery was prepared, and its properties were optimized from two aspects: pore-forming agent (dextrin) content and sintering temperature . The results show that the ceramic membrane with dextrin content of 3 wt.% and sintering temperature of 1150 ℃ has the best performance. Through characterization, the ceramic membrane exhibits an open porosity of 42.0 %, mechanical strength of 26.6 MPa, average pore size of 0.49 μm, pure water flux of 5616 L/(m 2 barh). And, it has excellent corrosion resistance in acid and alkali. In addition, the flue gas moisture recovery performance of coal fly ash-based tubular ceramic membrane was studied experimentally. The highest water recovery ratio and the highest recovered water flux is 87.7 % and 6.01 kg/(m 2 h, respectively.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Jiangtao Li,Xiaoxia Hu,Hong Liu,Jiansen Zhao,Mingchao Wang,Haiyan Du
Asymmetric ceramic membranes with disordered layer prepared by directional freeze-casting can be used as filter materials. However, there are few research achievements on the structural and permeability of disordered layers. Here, we obtained alumina asymmetric ceramic membranes with different disordered layer by adjusting the amount of alumina in the ceramic slurry. The results show that there are two kinds of structures in the disordered layer: spherical micropores and interconnected meshy pores, which lead to the change of airflow state. With the increase of the alumina content, the pore size of the disordered layer decreases and the network structure becomes complex, resulting in the decrease of the velocity of the inertial flow. The filter resistance of disordered layer increases obviously, but its proportion in the total filter resistance increases first and then decreases. The permeability is related to the pore size, specific surface area and channel complexity of the membrane.
研究领域:
材料科学
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流体力学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2017
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IF 1.174
Yanhui Yang,Qianqian Liu,Haizhi Wang,Fusheng Ding,Guoshan Jin,Chunxi Li,Hong Meng
The hydrophobically modified ceramic membranes have great potential for energy-efficient membrane distillation. In this work, flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1 H ,1 H ,2 H ,2 H -perfluorooctyltrichlorosilane or 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane and followed by ultraviolet irradiation. The surface water contact angle was improved from 46° of original ceramic membrane to 159°, which exhibited a stable and excellent superhydrophobic effect. The modified membranes showed a high flux of 27.28 kg·m − 2 ·h − 1 and simultaneously maintained an excellent retention rate of 99.99%, when used in vacuum membrane distillation process for treatment of a 1 wt% NaCl (75 °C) aqueous solution. These results suggested that superhydrophobic modification of ceramic surface is a facile and cost-effective way to achieve higher membrane distillation performance. The superhydrophobically-modified ceramic membrane with an excellent desalination capacity would show considerable potential in practical membrane distillation utilizations.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Guozhao Ji,Weijian Wang,Huihuang Chen,Siyuan Yang,Jing Sun,Weng Fu,Zhiqiang Huang,Bo Yang
Brine management is one of the global challenges nowadays. Herein, by taking advantage of capillary forces and low-grade heat (50 °C), we propose a novel ceramic membrane-promoted crystallization (MPC) process for brine management. The MPC process simplifies the traditional multiple energy-intensive steps and dispenses the use of expensive anticorrosive equipment via adopting three hierarchical layers (α-Al 2 O 3 substrate, γ-Al 2 O 3 interlayer, and SiO 2 top layer). The hydrophilic mesoporous SiO 2 top layer provides continuous driving force for brine solution transport from the inner shell of the membrane toward the outer surface, where heterogenous nucleation and secondary nucleation occur to form numerous long needle-like salt whiskers. The growth kinetics of salt whiskers accelerates with time as the formed salt whiskers provide extra evaporation area to intensify water evaporation. Template-directing molecules P123 significantly enhance the specific surface area, pore volume, pore size, and pore regularity of the SiO 2 top layer, thereby promoting both water recovery and salt production. The optimized membrane displays high water recovery (790.3 g m −2 ) and salt production (194.6 g m −2 ) for high-salinity brine (20 wt%). Moreover, the MPC process demonstrates high performance, mechanical stability and thermal durability during the long-term test. It is expected that the MPC process would provide an innovative zero-liquid discharge approach for the efficient and low-cost brine management.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ENERGY
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2023
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IF 9
Hongming Fu,Yubin Shen,Zhaohao Li,Heng Zhang,Haiping Chen,Dan Gao
The application of membrane absorption for CO 2 capture has been limited by membrane wetting. In this paper, tubular Al 2 O 3 ceramic membranes (marked as M1 and M2) are hydrophobically modified by sol-gel and dip-coating method and then used for CO 2 capture. The surface morphology , surface composition, wettability and flux are characterized in detail. The mass transfer performance of M1 and M2 is studied at different gas and liquid Reynolds numbers . After modification, the surface contact angle can reach as high as 170.7°. The carbon capture performance of the modified M1 and M2 is significantly improved. Under laminar flow condition , CO 2 mass transfer coefficient increased from the initial 1.03 × 10 −4 m/s to 14.59 × 10 −4 m/s, and the CO 2 capture efficiency increased from the initial 28.55%–98.55%. The mass transfer resistance of ceramic membrane contactor is also analyzed. The resistance of liquid phase plays a leading role in the mass transfer performance in laminar flow state . For non-wetting membrane, membrane thickness has little effect on the mass transfer performance. In addition, it is shown that the superhydrophobic M1 and M2 exhibit excellent corrosion resistance . The research in this paper shows that superhydrophobic ceramic membrane is more suitable for CO 2 capture in industrial production.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
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2023
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IF 9
Run Qi,Zhaohao Li,Hongyuan Zhang,Hongming Fu,Heng Zhang,Dan Gao,Haiping Chen
Membrane absorption is a promising CO 2 capture technology, which is limited by the high cost of membrane materials. Coal fly ash (CFA)-based ceramic membrane as an alternative material for membrane modules can effectively reduce the preparation cost. In this study, CFA-based ceramic membrane with superhydrophobic properties is prepared by depositing SiO 2 nanoparticles and grafting 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (POTS). Characters including pore size distribution, porosity and N 2 flux of superhydrophobic membrane are performed. The superhydrophobic modified ceramic membrane is applied to CO 2 capture experiments using ethanolamine (MEA) solution as the absorbent. The result shows that the contact angle of the modified ceramic membrane reaches 155.0°, which significantly improves the anti-wetting properties of the membrane surface . The CO 2 capture experiment demonstrates a maximum capture efficiency of 97.45% and a mass transfer rate of 21.17 mol/(m 2 ·h). In addition, the superhydrophobic modified ceramic membrane exhibits excellent thermal and chemical stability, sustaining high performance even after 8 h of continuous operation. This study provides the theoretical and empirical foundation for the application of CFA-based superhydrophobic ceramic membranes in CO 2 capture.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Chonggang Wang,Youming Yang,Jiuyang Lin,Feifei Yang,Hongmei Ye,Xuewei Li,Yinhua Wan
At present, in the mining process of ionic rare earths, the separation of rare earth element (REEt) from aqueous solution still relies on natural sedimentation, which has the disadvantage of low efficiency. Additionally, there will be a significant amount of rare earth ions (∼ 30 ppm) remaining in the supernatant. In this work, the use of flat ceramic membranes to separate REEt from aqueous solution is innovatively proposed. Firstly, the performance of REEt separation by flat ceramic membrane process was determined. It was found that the flat ceramic membrane process had good interception performance for REEt separation, and the concentration of rare earth ions in the supernatant was close to 0 ppm. Then, the impacts of different operating conditions (including operating time, backwash duration and concentration times) on the membrane fouling process were investigated. It was demonstrated that the shorter the operating time, the less the degree of membrane fouling. The operation of back washing was greatly beneficial to renew membrane flow. The change of reversible pollution resistance was calculated, the process of membrane pollution was analyzed by four pollution models, and the pollution mechanism was discussed in detail. Furthermore, the recovery of membrane flow after chemical cleaning and non-agent cleaning, and the changes in reversible fouling resistance under different concentration multiples were also studied. It is proved that the immersed flat ceramic membrane has the characteristics of low membrane fouling, high solid–liquid separation efficiency, and good stability for the separation and enrichment of rare earth particles, which shows great potential in industrial applications.
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
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Aobin Li,Maosong Wang,Huimin Sang,Wei Ke,Minghui Qiu,Qi Zhang,Xianfu Chen,Yiqun Fan
Ceramic membranes are increasingly recognized for their effectiveness in processing fermentation broths. However, developing ceramic membranes with superior anti-fouling properties remains a challenge for large-scale applications. Iron oxide nanomaterials have gained significant research interest as a cost-effective and readily available solution for mitigating membrane fouling , thanks to their excellent hydrophilicity. This study introduces ceramic membranes enhanced with iron oxide via a facile sol-gel technique. The membrane's resistance to fouling, hydrophilicity, adhesion force, and surface potential were assessed. Post-modification, a consistent distribution of iron elements on the membrane surface was achieved, with negligible alteration in pore size. Although the pure water permeance (450 ± 45 L m −2 h −1 ·bar −1 ) did not change significantly, the permeance of the modified membrane (225 L m −2 h −1 ·bar −1 ) was nearly 20 % higher than that of the original membrane when separating a 1000 ppm oil-in-water emulsion, with both membranes achieving 99 % oil droplet rejection. Moreover, the flux recovery rate of the modified membrane surpassed that of the original membrane by approximately 30 %, indicating a significant improvement in anti-fouling performance. Upscaling experiments further validated the modified membrane's anti-fouling performance and capability to rapidly process broths with high oil content. Overall, this study presents a novel anti-fouling ceramic membrane for the treatment of oil-containing fermentation systems.
研究领域:
生物工程
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Ruifeng Zhang,Qiuyan Niu,Jing Yang,Jingjing Tang,Binrong Zhu
The preparation of catalytic ceramic membranes with low cost and high activity to effectively remove antibiotics from water, is still a challenging work. In this paper, natural manganese sand (NMS) was used as an alternative material for synthesized metal oxide catalysts to prepare a novel catalytic ceramic membrane (NMS-CCM) for activating peroxymonosulfate (PMS) to degrade tetracycline (TC) from water. The preparation method, structural characteristics, catalytic performance, and mechanism were investigated. It is found that the NMS-CCM sintered at 1100 °C for 2 h and with the NMS mass ratio of 46 % exhibited appreciable properties, in which the pure water flux, porosity, and bending strength were 182.50 L/m 2 ·h·bar, 9.56 %, and 37.13 MPa, respectively. Additionally, the NMS-CCMs with PMS system can remove TC from water effectively with a removal rate higher than 83.93 %. Moreover, NMS-CCMs have good catalytic stability, with the removal efficiency of TC almost unchanged after 6 repeated use cycles, and the membrane fouling could be effectively reduced by increasing the concentration of PMS. Finally, 1 O 2 was proved to be the main reactive oxygen species for TC oxidation in the NMS-CCMs/PMS system and the catalytic reaction mechanism was preliminarily proposed. It can be concluded that NMS-CCM can be successfully prepared with a relatively low sintering temperature, and it has superior bending strength, appropriate water flux, and high activity to activate PMS for degrading TC in water. The results provide a new strategy for the development of natural mineral-based catalytic ceramic membranes with low cost and high catalytic activity.
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
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Qinyu Han,Tao Lin,Jiayu Du,Wei Liu
In order to remove the trace organic contaminants (TrOCs) in drinking water, an advanced oxidation system using ceramic membrane aeration was proposed in this study to generate ozone microbubbles (CA/O 3 ). The pesticide atrazine (ATZ) was selected as the target pollutant. The results showed that a 35.51 % higher removal efficiency was achieved using CA/O 3 compared to the traditional titanium diffuser aeration (TA/O 3 ). This improved performance was attributed to the higher aeration pressure in CA/O 3 , which resulted in a greater actual ozone dosage under identical inlet gaseous ozone flow rate and concentration. The microbubbles with small size, large specific surface area and prolonged residence time, further enhanced the aqueous ozone concentration and mass transfer rate within CA/O 3 . ·OH was found to be the main active species for ATZ degradation. Electron paramagnetic resonance (EPR) spectroscopy and probe experiments confirmed that the exposure ratio of ·OH in CA/O 3 was 2.12 times higher than in TA/O 3 . This contributed to the effective degradation of ATZ. Inlet gaseous ozone concentration was the critical factor influencing ozone mass transfer and degradation efficiency. Through LC-MS/MS analysis, coupled with frontier molecular orbital calculations, ten ATZ transformation products were identified, and dechlorination-hydroxylation and dealkylation were verified to be the primary transformation pathways. Based on blood flow activity, moving distance, and heart rate in zebrafish, toxicity assessments indicated that CA/O 3 effectively mitigated the toxicity of the transformation products. Therefore, CA/O 3 can be to efficiently degrade ATZ, ensuring effective control of toxicity associated with degradation products.
研究领域:
环境科学
·
化学工程
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Meng Zhang,Daliang Xu,Yanrui Wang,Jiaxuan Yang,Xiaobin Ma,Junwen Ding,Peijie Li,Langming Bai,Heng Liang
Ceramic membrane technology is effective for oil emulsion separation, while its low permeance and fouling issue yield high energy consumption in practical applications. Herein, a series of ceramic membranes were fabricated by incorporating the SiO 2 sintering aid into Al 2 O 3 ceramic powder using a compression molding method. Due to the melting and recrystallizing of SiO 2 on the surface of coarse grains, the modified ceramic membrane exhibited the underwater superoleophobicity property. After optimizing the fabrication conditions, including sintering temperature, molar ratio of Al 2 O 3 /SiO 2 and molding pressure, the modified ceramic membrane had a pure water permeance of 1319 L·m −2 ·h −1 ·bar −1 and a petroleum ether rejection rate of 97.1 %. In addition, the increase in the square quartz phase narrowed the pore size and improved the hydrophilicity of the ceramic membrane, thereby alleviating the pore blocking and enhancing the flux recovery. The flux recovery rate was about 86.1 % after the sodium hydroxide backwashing. This study presents a rational strategy for developing ceramic membranes with scalable potential for efficient oil emulsion separation.
研究领域:
材料科学
·
环境工程
✓ 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）