CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lujian Lin,Bo Yuan,Binghuang Zhang,Hanyi Li,Ran Liao,Hualong Hong,Haoliang Lu,Jingchun Liu,Chongling Yan
The demand for disposable face masks (DFMs) increased sharply in response to the COVID-19 pandemic. However, information regarding the underlying roles of the largely discarded DFMs in the environment is extremely lacking. This study focused on the pristine and UV-aged DFMs as vectors of metal ions (Pb(Ⅱ), Cd(Ⅱ), and Sr(Ⅱ)). Further, the aging mechanism of DFMs with UV radiation as well as the interaction mechanisms between DFMs and metal ions were investigated. Results revealed that the aging process would help to promote more metal ions adsorbed onto DFMs, which was mainly attributed to the presence of oxygen-containing groups on the aged DFMs. The adsorption affinity of pristine and aged DFMs for the metal ions followed Pb(Ⅱ) > Cd(Ⅱ) > Sr(Ⅱ), which was positively corrected with the electronegativity of the metals. Interestingly, we found that even if DFMs were not disrupted, DFMs had similar or even higher adsorption affinity for metals compared with other existing microplastics. Besides, regarding environmental factors, including salinity and solution pH played a crucial role in the adsorption processes, with greater adsorption capacities for pristine and aged DFMs at higher pH values and low salinity. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and density functional theory further confirmed that the pristine DFMs interacted with the metals mainly through electrostatic interaction, while electrostatic interaction and surface complexation jointly regulated the adsorption of the metals onto aged DFMs. Overall, these findings would help to evaluate environmental behaviors and risks of DFMs associated with metals.
研究领域:
环境科学
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材料科学
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公共卫生
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DOI
高影响因子
ChemElectroChem
·
2023
·Vol. 10
·期 16
·e202300134
·
IF 4
Yanxue Xu,Yunting Qin,Xilan Gao,Jing Li,Dan Xiao
Graphical Prussian blue analogue with cobalt (PB-Co) is used to fabricate the electrochemical sensor PB-Co 750-1 /SPE, which has the ultrasensitive response toward ascorbic acid (AA), dopamine (DA) and uric acid (UA). AA, DA and UA in tablets and several biological samples were determined by PB-Co 750-1 /SPE with recoveries in the range of 91 %∼114 %, indicating the reliability of PB-Co 750-1 /SPE.Prussian blue analogueelectrochemical detectiondisposable devicedopamineuric acid A Prussian blue analogue with cobalt (Na 2- x Co[Fe(CN) 6 ] 1- y , PB-Co ) , which is often used as sodium-ion battery material, was found to be an excellent sensing material toward some biomolecules by calcination. PB-Co calcined at 750 °C for 1 h (PB-Co 750-1 ) has the improved defects to facilitate the adsorption and the catalytic oxidation of ascorbic acid (AA), dopamine (DA) and uric acid (UA). PB-Co 750-1 modified on screen printed carbon electrode (SPE) for the ultrasensitively simultaneous determination of AA, DA and UA demonstrates the wide linear range, the low limit of detection (LOD) and the good reproducibility. In addition, the redox of the analytes was confirmed as the diffusion-controlled process via the kinetic study. The recoveries of AA, DA and UA in real samples were found between 91 % to 114 %. AA and UA in tablets, serums and urines could be determined by PB-Co 750-1 /SPE with the satisfactory results.
研究领域:
分析化学
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生物医学工程
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产品关联
DOI
高影响因子
Processes
·
2022
·Vol. 10
·期 6
·1045
·
IF 3.352
Zonghao Yu,Ruipeng Yu,Shengfang Wu,Weijie Yu,Qijun Song
The practice of odorant analysis can often be very challenging because odorants are usually composed of a host of volatile organic compounds (VOCs) at low concentrations. Preconcentration with solid phase microextraction (SPME) is a conventional technique for the enrichment of these volatile compounds before analysis by headspace gas chromatography-mass spectrometry (GC-MS). However, commercially available SPME products usually bear the defects of weak mechanical strength and high cost. In this work, novel SPME fibers were prepared by a one-pot synthesis procedure from divinylbenzene (DVB), porous carbon powder (Carbon) and polydimethylsiloxane (PDMS). Factors that influence the extraction efficiency, such as extraction temperature, extraction time, salting effects, pH, stirring rate, desorption temperature and time, were optimized. VOCs in landfills pose a great threat to human health and the environment. The new SPME fibers were successfully applied in the analysis of VOCs from the leachate of a cyanobacteria landfill. Quantification methods of major odor contributors were established, and a good linearity (r > 0.998) was obtained, with detection limits in the range of 0.30–0.50 ng/L. Compared to commercial SPME fibers, the new material has higher extraction efficacy and higher precision. Hence, it is suitable for the determination of hazardous odorants of various sources.Keywords:solid phase microextraction;one-pot synthesis;gas chromatography-mass spectrometry;hazardous odorants
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Chuanfeng Chen,Shanshan Du,Ziyan Liu,Wenfei Li,Fangbiao Tao,Xuejiao Qie
Background Human exposure to microplastics (MPs) is widespread, attracting significant attention from both the public and the scientific community. Although several direct and indirect exposure pathways have been investigated, the extent of MP exposure from disposable medical devices remains poorly understood and warrants further research. Results This work indicates that many MPs (10-30 μm) were released during the simulated use of disposable medical devices. Two common medical devices–disposable infusion tubes and blood needles–were selected as the research subjects. Analysis utilizing laser direct infrared (LDIR) revealed that plastic released from infusion tubes primarily consisted of polyamide (PA), polyvinyl chloride (PVC), and polyethene terephthalate (PET), with an average total number (ATN) of 11.8 particles/mL. MPs released from blood collection needles mainly consisted of polyurethane (PU) and PET, with an ATN of 82.7 particles/mL. For a 0.9% normal saline, the ATN released from the infusion tubes during the stimulating infusion scenario at room temperature (4 h) was approximately 16 particles/mL, primarily consisting of PA, PVC, and PET. Additionally, the release of MPs increased with rising temperatures. Under the same conditions, ATN release from the blood collection needles was approximately 84.4 particles/mL, mainly from PA, PVC, and PU. Significance This implies that MPs can enter the bloodstream directly through infusion tubes and blood collection needles, highlighting the need for greater attention to the risk of patient exposure.
研究领域:
环境科学
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医学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Yuan Jiang,Ruolan Xu,Chen Zeng,Kejie Wang,Lujia Han,Xuesong Zhang
This study explored a scalable decomposition-catalysis route to effectively valorize disposable COVID-19 face mask into tunable value-added products. The metal-doping carbonaceous catalysts (M/Cs) were successfully synthesized through a single-step energy-efficient thermal process. The modest decomposition-catalysis of face mask over Zn/C gave rise to a relatively high yield (73.52%) of liquid oil with 99% of selectivity toward jet fuel range (C 8 – C 16 ) hydrocarbons. Besides, the scalable decomposition-catalysis of face mask over Ni(50)/C at 800 ℃ was observed to thoroughly transform face mask into gas with the cumulative gas yield of 967 NmL/g mask , involving 49.90 vol% of H 2 and 40.90 vol% of CH 4 . Moreover, a dense, entangled growth of carbon nanotubes were formed on the surface of M/Cs. In brief, this study developed a scalable and promising route by using M/Cs for the valorization of COVID-19 face mask into hydrocarbon fuel or coupling harvest of H 2 -enriched fuel gas and carbon nanotubes.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
SENSORS
·
2019
·Vol. 19
·期 2
·268
·
IF 3.031
Xiao-Zhen Feng,Annaleizle Ferranco,Xiaorui Su,Zhencheng Chen,Zhiliang Jiang,Guo-Cheng Han
Simple and facile electrochemical sensors for nitrite detection were fabricated by directly depositing ferrocenoyl cysteine conjugates Fc[CO-Cys(Trt)-OMe]2[Fc(Cys)2] or Fc[CO-Glu-Cys-Gly-OH] [Fc-ECG] on screen-printed electrodes (SPEs). The modified carbon electrodes were characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Results indicated that Fc-ECG/SPE sensor showed enhanced current response and a lower overpotential than Fc(Cys)2/SPE sensor for nitrite detection. Optimal operating conditions were estimated for nitrite detection by DPV. The concentration of nitrite showed a good linear relationship with the current response in the range of 1.0–50 μmol·L−1and with 0.3 μmol·L−1as the concentration for limit of detection. There were no interferences from most common ions. The development of this electrochemical sensor was used for nitrite detection in pickled juice with a R.S.D. lower than 2.1% and average recovery lower than 101.5%, which indicated that disposable electrochemical sensor system can be applied for rapid and precise nitrite detection in foods.Keywords:electrochemical sensor;nitrite;ferrocenoyl cysteine;screen-printed electrode;disposable
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
npj Flexible Electronics
·
2025
·Vol. 9
·期 1
·1-9
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IF 15.5
Gao Jiuwei,Hu Mingwei,Sun Hao,Wang Yuanyuan,Wei Yuan,Li Weiwei,Zheng Lu,Xu Manzhang,Lu Qianbo,Liu Zhiyuan,Yang Hui,Wang Yongtian,Song Weitao,Wang Xuewen,Huang Wei
Long-term biopotential acquisition is of great significance for the early detection and timely treatment of various diseases. Currently, the standard silver/silver chloride (Ag/AgCl) gel electrodes may cause skin irritation when worn for a long time. Repeating the use of electrodes on different individuals can lead to the risk of cross-infection. Here, we propose a smart electronic tape (SET) to acquire biopotentials, in the form of a dry single-sided tape made from a combination of an ultra-stretchable conductive pattern on substrates with different functions. The high stability and durability of the patterned conductors provide accurate and timely acquisition of biopotentials, such as electrocardiograph (ECG) and electromyography (EMG). The strong adhesive behavior of the tape as well as the low-cost manufacturing process allow convenient and long-term wearing in a disposable manner. We anticipate the SET will pioneer next-gen wearable electronics for applications like disease prevention, health monitoring, and human–computer interaction.
研究领域:
生物医学工程
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健康监测技术
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可穿戴设备研究
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产品关联
DOI
高影响因子
Journal of Pharmaceutical Analysis
·
2016
·
IF 0
Cao Li,Jia Xu,Dan Chen,Yuxiu Xiao
Hexafluoroisopropanol (HFIP)-induced sodium dodecyl sulfate/dodecyltrimethylammonium bromide (SDS/DTAB) catanionic surfactant coacervate extraction method coupled with high performance liquid chromatography (HPLC) was used to detect the migration of phthalates from disposable tablewares to drinking water. The concentration factors are larger than 82 and extraction recoveries over 53% for water samples spiked with 100 or 200 ng/mL phthalates. Limit of detection is in the range of 1.0–2.6 ng/mL. Good linearity with correlation coefficients larger than 0.9985 is obtained in the concentration of 20–1500 or 40–3000 ng/mL. Relative recoveries are from 82.4% to 123.6% for water samples spiked with 30/60, 250/500, and 1500/3000 ng/mL phthalates, respectively. Relative standard deviations (RSDs) are 0.4%–7.4% for intraday precision ( n =5) and 0.6%–7.8% for interday precision ( n =3). Four of studied phthalates are found in the drinking water samples prepared from four kinds of tablewares.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 40
·51169
·
IF 3.125
Xianglong Li,Jing Liu,Yishen Lu,Teng Hou,Jing Zhou,Antuo Wang,Xianggui Zhang,Bin Yang
We developed a new environmentally-friendly disposable nonwoven based on centrifugally spun ST/PVA ultrafine fibrous membrane in this research. The effects of ST/PVA ratio as well as formic acid post-treatment on thermal properties, tensile strength, and disposability of fibrous membranes were studied. To observe the morphology and chemical structures changing of fibers during fabrication and post-treatment, the obtained fibers were characterized by scanning electron microscopy, x-ray diffraction, and Fourier transform infrared spectroscopy. The fibrous membranes with uniform fiber diameters and excellent disposability properties were formed. The ST/PVA ratio of fibers was optimized according to the disposability and tensile strength of the fibrous membranes. Disintegration of untreated and post-treatment fibrous membrane with ST/PVA ratio of 3/1 was over 80% and 40%, respectively, and the tensile strength was improved over two times comparing with pure starch fibrous membrane.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Yanhua Yang,Hang Lu,Juqing Liu,Yingzhong Shen
An efficient and readily available novel carbazole-based aromatic diamine was synthesized and characterized. Two polyimides ( PI-a and PI-b ) were prepared via a two-step procedure using the new synthesized diamine reacting with low-cost and the commercialized pyromellitic dianhydride (PMDA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), respectively. PIs were characterized and exhibited highly organo-solubility and thermal stability. The Al/ PI-a /ITO device showed binary write-once read-many-times (WORM) behavior with an ON/OFF current ratio up to 10 9 and the threshold voltage as low as −0.21 V, whereas the Al/ PI-b /ITO device presented ternary WORM behavior with an ON2/ON1/OFF current ratio up to 10 5 :10 4 :1 and the switching voltage below −3 V. The memory switching mechanisms were further elucidated through molecular simulation based on the density functional theory (DFT) method. This provides an effective strategy to achieve a ternary memory device.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 18
·5895
·
IF 4.927
Liang Yan,Chaoyan Zhang,Fengna Xi
A facile and highly sensitive determination of prostate-specific antigen (PSA) is of great significance for the early diagnosis, monitoring and prognosis of prostate cancer. In this work, a disposable and label-free electrochemical immunosensing platform was demonstrated based on chitosan–graphene-modified indium tin oxide (ITO) electrode, which enables sensitive amperometric determination of PSA. Chitosan (CS) modified reduced graphene oxide (rGO) nanocomposite (CS–rGO) was easily synthesized by the chemical reduction of graphene oxide (GO) using CS as a dispersant and biofunctionalizing agent. When CS–rGO was modified on the patterned ITO, CS offered high biocompatibility and reactive groups for the immobilization of recognition antibodies and rGO acted as a transduction element and enhancer to improve the electronic conductivity and stability of the CS–rGO composite film. The affinity-based biosensing interface was constructed by covalent immobilization of a specific polyclonal anti-PSA antibody (Ab) on the amino-enriched electrode surface via a facile glutaraldehyde (GA) cross-linking method, which was followed by the use of bovine serum albumin to block the non-specific sites. The immunosensor allowed the detection of PSA in a wide range from 1 to 5 ng mL−1with a low limit of detection of 0.8 pg mL−1. This sensor also exhibited high selectivity, reproducibility, and good storage stability. The application of the prepared immunosensor was successfully validated by measuring PSA in spiked human serum samples.Keywords:amperometric immunosensor;graphene composite;chitosan;disposable electrode;prostate-specific antigen
研究领域:
生物传感器
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材料科学
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电化学
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癌症诊断
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Xueyi Zheng,Qiaochen Feng,Liangqia Guo
The exposure of micro- and nanoplastics (MNPs) via medical device is still unknown to us. Herein, a visual quantitative detection of polyvinyl chloride (PVC) MPs and a fluorescent quantitative detection of PVC NPs were developed. To overcome the aggregation of PVC NPs, sodium dodecylbenzene sulfonate was used as the stabilizer of PVC NPs. The brand-new disposable PVC infusion tubes were found to carry PVC MPs with the average total number (ATN) of 931.4 particles and PVC NPs with the average mass of 0.040 μg, respectively. For four typical infusion fluids such as 0.9% sodium chloride, 5% glucose, 5% sodium bicarbonate , hydroxyethyl starch 40 sodium chloride, the released PVC MPs and NPs were ranged from 1003.6 ∼ 3494.6 particles and 0.042 ∼ 0.087 μg, respectively in stimulating normal infusion scenario (room temperature 4 h). The released PVC MPs and NPs were also increased with the infusion duration and temperature. The released PVC MPs are mainly in granular form, accounting for 38 ∼ 49% of the total PVC MPs. Our findings indicate PVC MNPs can enter the blood vessel directly with the infusion fluids during intravenous infusion and the PVC MNPs exposure risk towards patients deserves more attention.
研究领域:
医学
·
环境科学
·
材料科学
✓ 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）