JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Lu Wang,Yang Kang,Cheng-Yuan Xing,Kun Guo,Xiao-Qin Zhang,Li-Sheng Ding,Sheng Zhang,Bang-Jing Li
Airborne particulate matter (PM) pollution has become a serious environmental problem. Thus, there is a need for the development of air filters with satisfactory overall performance. In this paper, we develop a kind of β-cyclodextrin (β-CD) based air filter with high strength, which has not only high filtration efficiency (about 99%) but also good air permeability (the pressure drop is only 45Pa). Especially after long-term application, the pression drop of β-cyclodextrin based was less than half of the commercial air-filter. Additionally, the material can capture the toxic gasous chemicals (e.g. formaldehyde and SO 2 ). The introduction of β-CD is supposed to be the key factor for improvement of air filter.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 98
·期 1
·224-237
·
IF 2.326
Dong Wei,Qian Fuping,Li Qing,Tang Gang,Xiang Tengfei,Chun Tiejun,Lu Jinli,Han Yunlong,Xia Yongjun,Hu Jia
A high moisture content in the flue gas of iron and steel sintering process causes the issue of filter material pasting, which leads to a decrease in the filtration effect and service life of the filter material. Surface modification of the filter materials is a useful strategy for their hydrophobicity enhancement. Therefore, the Sol–gel method was employed to modify the polyethylene glycol terephthalate (PET) filter with tetraethyl orthosilicate(TEOS) as precursor and perfluorodecyl triethoxysilane (PFDTES) as modifier. Field emission scanning electron microscope (FESEM), Fourier transform infrared spectrometer (FT-IR), and contact angle tester were used to characterize the PET filter materials before and after modification, and exhaustive filter efficiency was evaluated by the comprehensive performance test machine. The particle size and distribution of SiO 2 nanoparticles were analyzed using a nanometer particle size analyzer, the effects of TEOS/PFDTES loading on the hydrophobic performance and filtration performance of the filter material have been discussed. Based on the results of these studies, superhydrophobic stability of the filter material was evaluated. The results show that the microscopic pore structure of PET filter materials was retained after modification. TEOS modified PET (T-PET) filter materials were completely wetted with static contact angle (WCA) of 0°. The surface energy of PFDTES modified PET (F-PET) filter materials was reduced, the WCA was 144.6 ± 1.6° and WSA was 7.6 ± 4.5°. For TEOS/PFDTES co-modified PET (TF-PET), the SiO 2 nanoparticles was modified by the long fluorine chain -CH 2 CH 2 (CF 2 ) 7 CF 3 groups, endowing TF-PET with superhydrophobic property. With the increasing of TEOS loading, TF-PET fiber presented significant enhancement of roughness, while average particle size of SiO 2 nanoparticles on the fiber surface gradually decreased. The particle size distribution first increased sharply, and then, slowly decreased when TEOS addition was enhanced. TF-PET filter material possessed WCA of 163.2 ± 2.3°, while when TEOS: PFDTES mass ratio was 2.5:2, WSA was 6.2 ± 1.9° with filtration efficiency (0.3 μm) of 68.61%.
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
NUCLEAR ENGINEERING AND DESIGN
·
2024
·
IF 1.9
Tao Liu,Haixia Kong,Yongguo Li,Jia Wang,Haifeng Yu,Yuan Li
In this paper, nano-grade aluminum powder was used as raw material to prepare glass fiber filter material with positive Zeta potential by hydrothermal method. Since colloids of activated corrosion products in primary circuit of nuclear power plant are mainly electronegative, the filter material prepared in this experiment was used to remove colloidal particles in coolant by combining traditional mechanical filtration with electrostatic adsorption, thus improving the removal efficiency of colloidal particles. The leaching problem of soluble silicon in glass fiber filter material was studied. The leaching amount of soluble silicon in glass fiber filter material was decreased while the filtration efficiency was improved. Consequently reduce the risk of safe operation of nuclear power plants.
研究领域:
材料科学
·
核工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Chaolang Chen,Lei Chen,Shuai Chen,Yadong Yu,Ding Weng,Awais Mahmood,Gaoqi Wang,Jiadao Wang
Huge discharge of oily wastewater has seriously threatened the ecosystem and human's health. Superhydrophilic/underwater superoleophobic porous materials have engaged considerable attentions in the application for separation of oil/water mixtures. However, there still exist several challenges in the existing material designs for oil/water separation that need to be addressed, such as terrible stability, high production cost and complex fabrication procedure. Herein, a series of all-inorganic superhydrophilic and underwater superoleophobic filtration materials were designed and fabricated by coating TiO 2 via a facile and universal technique of self-assembly, as well as successfully applied for the separation of both stratified oil/water mixtures and emulsions. The as-prepared TiO 2 nanoparticle coating is extremely dense, ultrathin and widely applicable for various two-dimensional (2D) and three-dimensional (3D) substrates such as stainless-steel mesh (SSM), metal felt and glass fibrous (GF) membrane. The coating can even be coated on the ultrafine fibers with diameter reaching to hundreds of nanometers. The TiO 2 coated SSM with large pores (~35 μm diameter) could efficiently separate the stratified oil/water mixtures with the flux up to 54000 L ⋅ m − 2 ⋅ h − 1 . Moreover, the TiO 2 coated GF membrane with small pores (~5 μm diameter) can separate diverse surfactant-free and surfactant-stabilized emulsions with separation efficiency higher than 98%. More importantly, excellent filtration flux up to ~4000 L ⋅ m − 2 ⋅ h − 1 was realized under solely gravity, which is one to two orders of magnitude larger than the flux of traditional filtration membranes, as well as more superior than most of the reported superwettable membranes. Furthermore, the as-prepared GF membrane displays outstanding high-temperature resistance and reusability for long-term application of oil/water separation.
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
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 107
·期 1
·178-189
·
IF 2.606
Li Qing,Qian Fuping,Yuan Ke,Dong Wei,Han Yunlong,Lu Jinli
In order to solve the problem of blocking the filter media when bag filters are used to deal with high-humidity dust, hydrophobic surface-modified filter media were prepared. Here we constructed a multi-layer rough structure using TiO 2 and SiO 2 , with polydimethylsiloxane (PDMS) subsequently deposited to reduce its surface energy to prepare stable and robust TiO2–SiO2@PDMS modified superhydrophobic filter media. Through modification of the filter media, its surface was changed from superhydrophilic to superhydrophobic, and the water contact angle reached 158°. For the particles with 0.3 μm, the filtration efficiency and quality factor of the modified filter media are higher than those of the unmodified filter media at a flow velocity of 0.043–0.127 m/s, which improves the filtration performance of the filter media. In addition, the modified filter media has strong durability in harsh environmental conditions (such as mechanical wear, strong acid or alkali solution), and has excellent self-cleaning performance. Therefore, such superhydrophobic filter media have great potential for the application of bag filters in various industrial production processes.
Graphical abstract
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Longxiang Han,Hengchang Bi,Haizhou Huang,Mao Ye,Jiawei Sun,Litao Sun
Global daily oil consumption reaches nearly 100 million barrels, a figure which consequently leads to the generation of substantial volumes of oily wastewater during the processes of oil production and transportation. Existing advanced materials exhibit remarkable properties for emulsions stabilized by specific surfactants. However, these materials face limitations in practical application due to the intricate composition of surfactants present in real-world oily wastewater. In this paper, we aim to tackle this issue by presenting a solution that involves the utilization of surface-engineered graphene-based multi-level filter materials (GMFMs). These specially prepared GMFMs incorporate positively charged, negatively charged, and uncharged graphene sheets, which synergistically combine to form a porous structure with unique wettability. This innovative design allows the filter material to exhibit exceptional separation capabilities for complex emulsions. The surface-engineered GMFMs exhibited exceptional efficiency in the separation of mixed surfactant-stabilized emulsions and industrial wastewater. Operating at a high throughput of approximately 5000 L m −2 h −1 , these GMFMs achieved an impressive oil removal efficiency of 99.8 % or higher after just one-step separation. The combined efficiency, reusability, and broad applicability of GMFMs facilitate efficient separation of oil-in-water emulsions on a large scale, promising a sustainable solution to the pressing issue of oily wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Feng Chen,Wenchao Lu,Changmin Liu,Qianlin Wang,Zhongli Ji,Yiming Chen
A new preparation method for a filter material with an inclined modification pattern is described herein. The effects of the inclination angle of the strips, the composition and the number of layers on the performance of the filter materials were analysed systematically. On this basis, the optimal structure and parameters of the filter materials were determined. The performance of this filter material was verified by preparing an industrial filter cartridge. The results demonstrated that the filter materials achieved the highest comprehensive filtration performance when the inclination angle of the modification strips was 75°. The steady-state quality factor improved by up to 137.1 % compared to the original filter materials with uniform wettability. The double-layer filter had the best filtration performance when the front and back layers were both modified filter materials and the strips were overlapped. In terms of the impact of layers, the seven-layer composite filter material achieved the optimal comprehensive filtration performance for oil mists of different sizes (1.18 and 2.60 kPa −1 for sub-micro and micro droplets respectively). After the modified filter material and the original filter material were processed into a filter cartridge, the modified filter cartridge showed significant advantages of ‘pressure drop and efficiency improvement’ under different superficial gas velocities compared to the unmodified filter cartridge.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chengwei Xu,Zhenyan Lu,Yan Yu,Lirong Li
To address the issue of significant pressure drop in coalescing filters caused by liquid film phenomena, we employed centrifugal spinning to fabricate a novel hybrid fibrous filter with an interlaced structure of oleophilic/oleophobic fibers. The unique hybrid structure of the filter greatly enhances its ability to suppress the formation of liquid films and improves coalescence performance. Compared to both commercial filters and Janus filters, the hybrid filter exhibits a lower pressure drop increase ratio of 3.32 at the saturation stage, as opposed to Janus filter’s 13.95. Additionally, the quality factor of the hybrid filter reaches 9.8 kPa −1 , which is significantly higher than Janus filter’s 2.54 kPa −1 . This paper presents a new approach for enhancing coalescence performance.
研究领域:
材料科学
·
环境工程
·
过滤技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Zhiyong Cheng,Hao Guan,Junwang Meng,Xiaoqing Wang
High-performance functional materials capable of simultaneously separating oil from water and removing water-soluble contaminants are critically demanded for wastewater treatment but remain highly challenging. Wood, a naturally occurring porous material composed of numerous open microchannels along the growth direction, may serve as a desirable scaffold for the development of efficient filtration materials for water treatment. Herein, by in situ deposition of silver nanoparticles (Ag NPs) within the channels of balsa wood, we developed dual-functional Ag/wood filters for simultaneous oil/water separation and organic dye removal from water in a one-step process. Owing to their superhydrophilicity and underwater superoleophobicity, the as-prepared Ag/wood filters can selectively separate water from oil with a high efficiency (∼99%). Moreover, benefiting from the catalytic activity of Ag NPs anchored to the surface of the wood channels, the Ag/wood filters effectively removed methylene blue (MB) from water during the oil/water separation process; the MB removal efficiency was highly dependent on the thickness of the wood filters. Specifically, the gravity-driven separation using a 6 mm-thick Ag/wood filter showed a high MB degradation efficiency of 94.03% and a water flux of 2600 L·m–2·h–1. The proposed wood-based filtration material features renewable, inexpensive raw materials, facile processing, and scale-up potential. Such dual-functional Ag/wood filters capable of rapid and efficient removal of insoluble oils and soluble pollutants from water in a one-step process offer a promising solution for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mei Hong,Xiao Ma,Wenyuan Hu,Chen Zhu,Wei Dong,Lumin Chen,Fuping Qian
The issue of air pollution, encompassing airborne bacteria and particulate matter (PM), has emerged as a prominent concern impacting human comfort and health. However, conventional air filtration materials fail to meet the requirements for efficient PM capture or immediate bacteria elimination, thereby heightening the risk of contracting diseases due to pollutant accumulation during filtration. Herein, the hydroxyl group in cellulose acetate (CA) was used as the nucleation site to facilitate the self-assembly of Cu-MOF crystals on PET substrate through hydrogen bonding, and then a layer of PVDF-HFP was electrostatically sprayed to finally obtain the high-efficiency and low-resistance PET/CA-MOF-PH air filtration material. On the one hand, the PET/CA-MOF-PH filter material exhibits outstanding filtration performance (99.82 % for PM1.0, 99.93 % for PM2.5, and 99.99 % for PM10) and a low-pressure drop (62 Pa) due to the highly dispersed and dense micro- and nanostructures of the surface layers of the filter material. On the other hand, benefitting from Cu 2+ in the Cu-MOF crystals, PET/CA-MOF-PH filter material also performs excellently in bacterial killing. The filtration capacity difference between commercial PET fibers and PET/CA-MOF-PH filter media at various wind speeds was further investigated through dynamic particle capture simulation and airflow field distribution analysis. This study thus suggests that PET/CA-MOF-PH with high filter efficiency, low resistance, and excellent antibacterial activity designed by self-assembly/electrostatic spraying strategy is expected to be an ideal material for air filters, and this strategy can guide the rational design of multifunctional novel filter materials suitable for environmental and energy fields.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiu-Hong Zhu,Guo-Hao Zhang,Lei Zhang,Jie Fu,Yue-Ru Zhou,Yu-Qin Xiang,Lijian Ma,Guo-Hong Tao,Ling He
Charge dissipation of filter adsorption layer can seriously affect the electrostatic filtration efficiency to cause infection. Here, a self-charge-carrying filter with particulate matters (PMs) removal efficiency retention performance was fabricated by in situ polymerization. The filter consists of a polymerized ionic coating, that is the in situ growth of bio-curcumin ionic liquid (CIL), covered the surface of sponge network forming PCILG@MF composite. Benefiting from inherent ionic transport properties of CIL, the filter allows for a continuous electric field to attract particles, avoiding the charge loss of adsorption materials during long-term using. The filter remained a high efficiency of over 97% after 30 h, even for nano-sized influenza viruses. Interestingly, the PCILG@MF also provides a chelating effect to capture PMs containing various heavy metals. In comparison with commercial mask, the filter exhibits significantly less powder shedding to reduce potential human inhalation toxicity. The present work highlights the potential of self-charge-carrying CIL-based filter for air pollution.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jing Hu,Zhenjun Xiong,Yuqing Liu,Jinyou Lin
Conventional petroleum-based synthetic polymeric fiber filter materials for separation may cause secondary pollution to the environment due to their non-degradable properties. Herein, we report a facile method of preparation of a biodegradable composite filter that can achieve filtration for air by underlaying the commercialized cellulose paper towel under electrospun zein fibers. The morphology of zein fibers was successfully steered via varying the weight ratios of ethanol/deionized water mixture solvent, as a result, the round or flat ribbon fibers were obtained. The effect of zein fiber morphology on air filtration performance was investigated both experimentally and theoretically. It was found that the flat ribbon fiber filter had a higher filtration efficiency (99%) for PM0.3 removal and a lower pressure drop (109 Pa) compared with the round zein fiber filter. Notably, the as-prepared composite filter can be biodegradable easily, contributing to green ecological environment. This work shows an efficient way to develop biodegradable filtration materials with the cheap price, easy availability of component materials, exhibiting a great potential application in air filtration area.
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
危险品化学品经营许可证（带存储）