Nano Energy
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2017
·
IF 12.343
Guoyin Zhu,Tao Chen,Yi Hu,Lianbo Ma,Renpeng Chen,Hongling Lv,Yanrong Wang,Jia Liang,Xiaojie Li,Changzeng Yan,Hongfei Zhu,Haixia Liu,Zuoxiu Tie,Zhong Jin,Jie Liu
Particulate matter (PM) pollution has become a serious environmental problem, especially in developing countries, owing to its severe threat to human health. Particularly, airborne PM 2.5 (mean aerodynamic diameter ≤2.5 µm) particles are extremely harmful, because the tiny particles can enter human respiratory system and even penetrate into circulatory system. Herein, we propose an effective strategy to recycle PM 2.5 carbon nanoparticles generated by diesel vehicle engine for the applications of clean energy. After thermal treatment and purification, the PM 2.5 derived carbon nanoparticles show a diameter distribution between 25 and 40 nm, mesoporous characteristics (with an average pore size of ~3.3 nm), and homogeneous nitrogen incorporation (with N content of ~1.1 at%). The PM 2.5 derived N-doped mesoporous carbon nanoparticles were used as an advanced electrode material in supercapacitors , exhibiting excellent specific capacity and superb stability over long-term cycling. Moreover, the recycled PM 2.5 carbon nanoparticles show attractive electrocatalytic properties for oxygen reduction reaction , presenting high onset potential and good immunity to methanol crossover . We expect this research can provide inspiration for air pollution control and sustainable energy utilization.
研究领域:
环境科学
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材料科学
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能源科学
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产品关联
DOI
高影响因子
Journal of Industrial Textiles
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2022
·
IF 2.926
Yang Lei,Rong-Rong Cai,Rui-Qi Lin,Li-Zhi Zhang
Face masks are commonly used to protect an individual’s respiratory system from inhaling fine particulate matter (PM2.5) in polluted air, as well as the airborne pathogens, especially during the ongoing coronavirus disease 2019 (COVID-19) pandemic. However, all conventional masks with anti-PM2.5 function suffer from insufficient facial thermal comfort, particularly in a hot and humid environment. Herein, we demonstrated a novel infrared-transmittance visible-opaque PM2.5 media for radiative cooling utilizing rutile titanium dioxide particle-embedded polyamide 6 (PA6-TiO2). The transmission of visible light and infrared and PM2.5 removal performance of composite media containing a variety of microstructures, such as TiO2 particles of varying sizes, shapes, and contents, were numerically examined to determine the optimal ranges. Then the PA6-TiO2 media was effectively electrospun by controlling the arrangement of fibers and the morphology of TiO2 particles. By transmitting more than 85% of the thermal radiation from the human body and selectively blocking solar irradiance, the developed PA6-TiO2(flower-shaped) media cooled the simulative skin by 10.3°C as compared with commercial masks under strong solar irradiance. Additionally, they demonstrated a high PM2.5 removal efficiency of 95.3%, a low air resistance of 22.5 Pa (at 5.3 cm/s), and a sound water vapor transmission rate of 0.0169 g cm−2 h−1. This study presents an effective strategy for making thermally comfortable anti-PM2.5 masks, which will significantly benefit the public health prevention and control.
研究领域:
材料科学
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环境科学
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公共卫生
✓ 已验证
产品关联
DOI
高影响因子
BUILDING AND ENVIRONMENT
·
2018
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IF 4.539
Ye Bian,Li Zhang,Chun Chen
Electrospun nanofiber air filters can achieve high PM 2.5 removal efficiency with a relatively low pressure drop because of the slip effect. They may therefore be applied in buildings to reduce indoor exposure to PM 2.5 with lower energy consumption. This study first fabricated 25 nylon nanofiber filters with different filter parameters of fiber diameter , filter thickness, and packing density. The pressure drop across each nanofiber filter was measured under five different face velocities. This study then developed a method for modeling the pressure drop across electrospun nanofiber air filters using the filter parameters. 125 sets of experimental data were obtained for the model development, and a semi-empirical model was developed to predict the pressure drop across nylon electrospun nanofiber filters. The results showed that the pressure drop was proportional to the face velocity and filter thickness. The product of drag coefficient and Reynolds number was a function of both packing density and Knudsen number . The semi-empirical model reasonably predicted the pressure drop across the nylon electrospun nanofiber filters with a median relative error of 4.3%.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Zhefu Wu,Qing Su,Jie Yang,Zhimei Wei,Gang Zhang
Particulate matter 2.5 (PM 2.5 ) has become a major threat to human lives. To minimize the adverse effect of high temperature PM 2.5 , the best way is to alert and filter out the PM 2.5 simultaneously. However, it remains a challenge to design filters with combined merits of high-performance, fire-retardancy and thermal response. In this work, we prepare the thermochromic luminous polysulfone membrane with high-temperature PM 2.5 filtration and alarming property. The dual luminous center containing covalent donor–acceptor (DA) structure and metal–ligand interaction are incorporated and electrospun into structure unified nanofibers. And different thermal responsiveness is observed for the dual luminous center. The high PM 2.5 filtration efficiency (99.1%), low pressure drops (98 Pa) and heat-resistant (T g > 236 °C) membrane can be directly applied on an in-situ high-temperature PM 2.5 filtration and monitoring device, with the emission color variable from red to cyan in a wide range. More importantly, PBN composite filters show excellent flame retardancy in comparison with the commercial PE fabrics, and the color indicating property functions well even under fire. Therefore, the PBN composite membrane holds great potential in the fields of high-temperature PM 2.5 filtration and fire alarming.
研究领域:
材料科学
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环境科学
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纳米技术
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消防安全工程
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产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2020
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IF 4.872
Yilin Zhang,Dongwei Liu,Zhangsuo Liu
Background Evidence shows that individuals who are under long-term exposure to environmental PM 2.5 are at increased risk of chronic kidney disease. Various laboratory experiments also suggest several mechanistic links between PM 2.5 exposure and kidney injury. Polycyclic aromatic hydrocarbons (PAHs) are common organic chemicals existing in PM 2.5 . However, whether benzo [b]fluoranthene (BbF), the most potent carcinogens and the highest content of PAHs, plays an important role in podocyte injury via reducing autophagy, have not been reported. Methods Podocytes were exposed to different concentrations and times of BbF. Cell viability was assessed by using CCK-8. Morphological phenotypes were detected by using optical microscopy. Cytoskeletons were detected by using immunofluorescence assay. Expression of podocyte injury markers were determined by Western blot. Podocytes were observed under TEM, autophagic activity was evaluated by Western blot analysis and immunofluorescence assay. A possible effect of an inhibitor (CQ, chloroquine) or an inducer (rapamycin) of autophagy on BbF-induced podocyte injury also was examined. Results BbF changed cellular morphology, decreased cell viability and rearranged cytoskeleton. The proteins' expression level of autophagy and the numbers of autophagosomes under TEM was decreased and the proteins’ expression level of slit diaphragm was increased in a dose- and time-dependent manner. In addition, BbF-induced podocyte injury was enhanced by inhibition of autophagy and inhibited by activation of autophagy in podocytes. Conclusions Taken together, our data suggest that BbF is toxic to podocytes, as well as reduce autophagy. Furthermore, inhibition of autophagy plays a regulatory role in BbF-induced podocyte injury.
研究领域:
环境健康
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毒理学
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细胞生物学
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肾病学
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产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2023
·
IF 6.8
Guanqing Jiang,Xu Song,Jiaying Xie,Tongxing Shi,Qiaoyuan Yang
Polycyclic aromatic hydrocarbons (PAHs) in PM 2.5 pose potentially serious threats to human health. In this study, the distribution characteristics of 16 priority controlled, fine PM (PM 2.5 )-bound PAHs in the ambient air of Guangzhou city were analysed from 2016 to 2019. Four high-molecular-weight PAHs with the highest annual average concentrations were benzo[ghi]perylene (BghiP; 0.757 ng/m 3 ), indeno(1,2,3-cd)pyrene (IcdP; 0.627 ng/m 3 ), benzo[ b ]fluoranthene (BbF, 0.519 ng/m 3 ) and 3,4-benzopyrene (BaP; 0.426 ng/m 3 ). Increasing concentrations of BghiP, IcdP, BbF and BaP were associated with increasing numbers of outpatient visits for respiratory diseases, indicating that exposure to these PAHs potentially causes acute respiratory injury in residents. Acute exposure of the human bronchial epithelial cell line BEAS-2B cells to BghiP, IcdP, BbF and BaP in vitro resulted in acute inflammation, DNA damage and apoptosis. Further bioinformatic analysis indicated that nuclear receptor subfamily 1 group D member 1 ( NR1D1 ) may be a key target gene involved in mediating the toxic effects of BghiP. Collectively, our results suggest that BghiP and the other PAHs represented by it can damage the respiratory system and induce lung cancer. This study provides valuable evidence regarding the potential health risks posed by local ambient PAHs pollution.
研究领域:
环境科学
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公共卫生
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毒理学
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
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2017
·Vol. 7
·期 1
·1-13
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IF 4.259
Wang Hetong,Song Laiyu,Ju Wenhui,Wang Xuguang,Dong Lu,Zhang Yining,Ya Ping,Yang Chun,Li Fasheng
PM 2.5 is the main particulate air pollutant whose aerodynamic diameter is less than 2.5 micron. The inflammation of various respiratory diseases are associated with PM 2.5 inhalation. Pro-inflammatory cytokine IL-1β generated from effected cells usually plays a crucial role in many kinds of lung inflammatory reactions. The exacerbation of Th immune responses are identified in some PM 2.5 related diseases. To elucidate the underlying mechanism of PM 2.5 -induced acute lung inflammation, we exposed Balb/c mice to PM 2.5 intratracheally and established a mice model. Acute lung inflammation and increased IL-1β expression was observed after PM 2.5 instillation. Regulatory factors of IL-1β (TLR4/MyD88 signaling pathway and NLRP3 inflammasome) participated in this lung inflammatory response as well. Treatment with compound essential oils (CEOs) substantially attenuated PM 2.5 -induced acute lung inflammation. The decreased IL-1β and Th immune responses after CEOs treatment were significant. PM 2.5 may increase the secretion of IL-1β through TLR4/MyD88 and NLRP3 pathway resulting in murine airway inflammation. CEOs could attenuate the lung inflammation by reducing IL-1β and Th immune responses in this model. This study describes a potentially important mechanism of PM 2.5 -induced acute lung inflammation and that may bring about novel therapies for the inflammatory diseases associated with PM 2.5 inhalation.
研究领域:
免疫学
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呼吸医学
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环境健康
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2015
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IF 0.754
Liang HAO,Da-Peng WU,Ya-Feng GUAN
The method of micro-pressurized liquid extraction (μ-PLE) coupled with gas chromatography-mass spectrometer (GC-MS) for analysis of 4 dicarboxylic acids (DCAs, including malonic acid, succinic acid, glutaric acid, and adipic acid) in fine atmospheric particles was developed. PM 2.5 filter sample was extracted by μ-PLE at a pressure of 8 MPa and temperature of 80 °C using methanol as extraction solution. After two static 5-min extractions and a rinsing step with 100 μL methanol, about 500 μL of extraction solution was obtained. The extraction solution was then blown to dry with high purity nitrogen and submitted to a silylation reaction at 60 °C for 30 min. After internal standard (IS) was added, the derivatization solution was directly injected for GC-MS analysis. For quantification of 4 normally DCAs in fine atmospheric particles, the calibration curve was obtained with a good linear relationship in the range of 0.2–20 ng μL −1 . The limits of quantification (LOQs, S/N = 10) were in the range of 0.15–0.47 ng m −3 . The relative recoveries were between 92% and 122% with the RSDs between 2.6% and 11.8% for spiked filter samples. The method developed here was used to determine malonic acid, succinic acid, glutaric acid, and adipic acid in real PM 2.5 samples collected from Xinghai Bay of Dalian city, and the results were determined to be 64.6, 50.0, 41.8 and 20.2 ng m −3 , respectively.
研究领域:
分析化学
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环境科学
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大气化学
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产品关联
DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 7
·3889-3902
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IF 4.21
Zhu Mengni,Cao Qiping,Liu Bingyang,Guo Haoyu,Wang Xing,Han Ying,Sun Guangwei,Li Yao,Zhou Jinghui
Abstract Global air pollution poses a serious risk to human health. Among the variety of types of pollution, inhalable particulate matter (PM 2.5) is proved to be extremely harmful. In this work, a simple method was designed to synthesize a novel air filter, which composed of cellulose acetate and poly (ionic liquids) by using the technique of macromolecular design and electrostatic spinning process. The introduction of poly (ionic liquids) effectively reduced the diameter of fibers and thus obtains nano-fibrous filters. The removal rate of PM 10 and PM 2.5 particle by the filters reached 99.65% and 97.94%, respectively. Furthermore, the filters exhibited excellent antibacterial properties against Escherichia coli and Staphylococcus aureus , and no obvious cytotoxicity was observed in vitro culturing cell. After multiple recycling, the filters still maintained excellent antimicrobial properties and fibrous morphology due to the stable covalent bonds between cellulose acetate and poly (ionic liquids). This is a novel strategy to prepare high-quality air filters, which have great potential applications in air purification. Graphic abstract We fabricated a kind of green electrospinning material with stable antibacterial properties through organic synthesis and molecular design. The introduction of poly (ionic liquids) effectively reduces the diameter of fibers and thus obtains nano-fibrous filters. The removal rate of PM 10 and PM 2.5 particle by the filters reached 99.65% and 97.94%, respectively. Furthermore, the filters exhibit excellent antibacterial properties against E. coli and S. aureus, and no obvious cytotoxicity is observed in vitro culturing cell. After multiple recycling, the filters still maintain excellent antimicrobial properties and fibrous morphology.
研究领域:
环境科学
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材料科学
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纳米技术
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空气质量管理
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产品关联
DOI
高影响因子
ENVIRONMENTAL TOXICOLOGY
·
2022
·Vol. 37
·期 9
·2201-2213
·
IF 4.109
Qi Xiong,Xiang Tian,Congyue Xu,Baomiao Ma,Wei Liu,Binlian Sun,Qin Ru,Xiji Shu
PM 2.5 exposure has been demonstrated to correlate with neurological disorders recently. Ferroptosis is recognized as a newly found programmed form of cell death associated with neurodegenerative diseases, while glutathione peroxidase 4 (GPX4) is a key regulator of ferroptosis. However, the relationship between PM 2.5 -induced neurotoxicity and ferroptosis is still unclear. The current study aims to investigate if ferroptosis is involved in neurotoxicity post PM 2.5 exposure and its underlying mechanism. The PM 2.5 -treated neuronal Neuro-2a (N2A) and SH-SY5Y cells were applied to the current study. The results showed that PM 2.5 significantly increased the neuronal cell death, yet the ferroptosis antagonist Ferrostain-1 (Fer-1) markedly decreased the cell death induced by PM 2.5 . Western blot further confirmed that ferroptosis was triggered post PM 2.5 treatment in N2A cells by decreasing expressions of GPX4 and ferritin heavy chain (FTH), as well as enhancing expressions of ferritin light chain (FTL) and transferrin receptor protein (TFRC). Meanwhile, PM 2.5 treatment augmented neuronal oxidative damage and mitochondrial dysfunction. The bioinformatic analysis indicated that CREB could be the regulator of GPX4, and our results showed that ERK/CREB pathway was down-regulated in N2A cells post PM 2.5 treatment. The addition of ERK1/2 agonist post PM 2.5 treatment significantly inhibit ferroptosis via increasing the expression of GPX4. Taken together, the present study demonstrated that PM 2.5 -induced ferroptosis via inhibiting ERK/CREB pathway, and these findings will advance our knowledge of PM 2.5 -induced cytotoxicity in the nervous system.
研究领域:
神经科学
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毒理学
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细胞生物学
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环境健康
✓ 已验证
DOI
PubMed
高影响因子
Advanced Science
·
2021
·Vol. 9
·期 3
·2102460
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IF 16.806
Rui Zheng,Mulong Du,Man Tian,Zhaozhong Zhu,Chengcheng Wei,Haiyan Chu,Cong Gan,Jiayuan Liang,Renjie Xue,Fang Gao,Zhenguang Mao,Meilin Wang,Zhengdong Zhang
Fine particulate matter less than 2.5 µm in diameter (PM 2.5 ) is a major risk factor for acute asthma attacks in children. However, the biological mechanism underlying this association remains unclear. In the present study, PM 2.5 -treated HBE cells-secreted extracellular vesicles (PM 2.5 -EVs) caused cytotoxicity in “horizontal” HBE cells and increased the contractility of “longitudinal” sensitive human bronchial smooth muscle cells (HBSMCs). RNA sequencing showed that let-7i-5p is significantly overexpressed in PM 2.5 -EVs and asthmatic plasma; additionally, its level is correlated with PM 2.5 exposure in children with asthma. The combination of EV-packaged let-7i-5p and the traditional clinical biomarker IgE exhibits the best diagnostic performance (area under the curve [AUC] = 0.855, 95% CI = 0.786–0.923). Mechanistically, let-7i-5p is packaged into PM 2.5 -EVs by interacting with ELAVL1 and internalized by both “horizontal” recipient HBE cells and “longitudinal” recipient-sensitive HBSMCs, with subsequent activation of the MAPK signaling pathway via suppression of its target DUSP1 . Furthermore, an injection of EV-packaged let-7i-5p into PM 2.5 -treated juvenile mice aggravated asthma symptoms. This comprehensive study deciphered the remodeling of the extracellular environment mediated by the secretion of let-7i-5p-enriched EVs during PM 2.5 -induced asthma attacks and identified plasma EV-packaged let-7i-5p as a novel predictor of childhood asthma.
研究领域:
环境健康
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分子生物学
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呼吸医学
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细胞生物学
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临床诊断
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Changzhe Zhou,Wenjing Han,Xingda Yang,Hongwei Fan,Chunxi Li,Liangliang Dong,Hong Meng
Efficient filtration of particulate matter (PM) is the major goal for various air cleaning technologies. However, most existing air filters are conducted at room temperature with a relative humidity (RH) of around 45%, ignoring the fact that many operate under high temperature and RH above 90%. Herein, we report the successful fabrication of a polyetherimide (PEI)/zeolitic imidazolate framework-67 (PEI/ZIF-67) nanofibrous membranes using electrospinning technology, which showed steady and high efficiency PM filtration performance under a high temperature of 200 °C and RH of 90%. Compared with pure PEI nanofibrous membranes, the resultant nanofibrous membranes containing 2 wt% of ZIF-67 showed an increase of 112% and 109% in removal efficiency of PM 2.5 and PM 10, respectively, which are attributed to synergistic effects of enhanced surface roughness, strengthened electrostatic interaction and small pore size by the introduction of the ZIF-67. More importantly, after operating under a high RH of 90% over 70 h, the removal efficiency of such PEI/ZIF-67 nanofibrous membranes remained almost unchanged. Density functional theory calculations suggested that the ZIF could efficiently reduce water adsorption and thereby avoid the PEI being damaged by water. Such a finding demonstrated that the ZIFs should be promising candidates for designing highly stable nanofibrous membranes under extremely high RH and high temperature conditions.
研究领域:
材料科学
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环境工程
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纳米技术
✓ 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）