CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yahan Yu,Chunxiu Yu,Zelin Wu,Bingkun Huang,Peng Zhou,Heng Zhang,Wen Liu,Yucheng Liu,Zhaokun Xiong,Bo Lai
Concurrently elevating the degradation efficiency of pollutants and realizing the reduction of iron sludge in Fe-based catalytic ozonation is important but still challenging. Herein, we developed an electrocatalytic ozonation (ECO) system with iron plate cathode and graphite felt anode (ECO-Fe-cathode), which was free from added chemical reagents. Unlike the iron plate as a sacrificial anode in the ECO (ECO-Fe-anode) system, this delicately designed system shows a much higher degradation rate of ibuprofen ( k obs = 1.490 min −1 ) than that of the ECO-Fe-anode system ( k obs = 0.345 min −1 ). Simultaneously, the effluent was totally limpid without the corrosion of iron plates and the formation of iron sludge in the ECO-Fe-cathode system. Unexpectedly, the generation of singlet oxygen ( 1 O 2 ) which is indirectly generated by the single-electron transfer derived from superoxide ion (O 2 •- ) is the primary reactive oxygen species (ROS) in the ECO-Fe-cathode system, which is different from the ECO-Fe-anode system with hydroxyl radicals ( • OH). Moreover, linear sweep voltammetry (LSV) was applied to reveal the oxygen evolution reaction (OER) performance of the iron plate and graphite felt, and the results showed that graphite felt as anode has better electrocatalytic performance. The electrochemical analysis and density functional theory (DFT) calculation revealed that ozone adsorbed on the iron plate surface is more conducive to facilitating and triggering subsequent reactions. Finally, the different degradation pathways of ibuprofen in both systems were proposed. This work represents a fundamental breakthrough toward the design of an efficient and harmless ECO system for wastewater treatment.
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Jianyong Zhao,Xiangchao Meng
A novel slant perforated mesh-plate photoreactor (SPPR) was designed and fabricated. The central assembly of SPPR was an array of slant perforated mesh-plate coated with TiO 2 (P25). The performance of SPPR in water detoxification was evaluated with regard to the degradation of phenol as the target pollutant. The effects of slant plate tilt angle (α) and perforated plate opening aperture diameter on SPPR performance were investigated and analyzed. The photocatalytic performance of SPPR increased with decreasing α. The SPPR with an α of 15° and a pore size of 1 mm showed the best performance with 9.17 h required to reach 80% of phenol degradation (4-L, initial concentration: 15 mg/L). The mass transfer was introduced into the kinetic reaction model, and mass transfer coefficients were calculated for SPPRs with different structures. Flow rate and initial pollutant concentration were investigated for their effects on degradation efficiency. In addition, the activity of SPPR under natural sunlight has also been tested to explore its potential to be applied in practice.
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ANALYTICA CHIMICA ACTA
·
2022
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IF 6.911
Wen-Bo Xie,Hao Li,Lei Zeng,Li-Juan Jiang,Wen Li,Lu Xia,Fu-Hou Lei
A column prepared using a unique three-membered phenanthrene skeleton of rosin has complementary selectivity to a C18 column for some separation tasks. In this study, propylene pimaric acid (16-hydroxyethyl acrylate-34-n-butyl) ester (BRB) and propylene pimaric acid (16-hydroxyethyl acrylate-34-dodecyl) ester (BRLA) were used as functional ligands to prepare two novel stationary phases, namely BRB@SiO 2 and BRLA@SiO 2 , through a “thiol-ene” click chemistry reaction. The characterization results of Fourier transform infrared spectroscopy , thermogravimetric analysis , nitrogen adsorption-desorption measurements, and contact angle tests showed that the BRB@SiO 2 and BRLA@SiO 2 stationary phases were successfully prepared. In addition, the performance of the columns was evaluated using the Tanaka test and hydrophobic subtraction model, which showed that the stationary phases exhibited typical reversed-phase chromatography performance and good hydrophobicity , hydrophobic selectivity , and steric selectivity. The changes in the retention of Panax notoginseng saponins on a column under different chromatographic conditions (acetonitrile content, flow rate , and column temperature) were investigated. The separation effect of BRB@SiO 2 and BRLA@SiO 2 columns on P. notoginseng saponins was better than that of the C18 column and the BRLA@SiO 2 column could replace the C18 column for the detection of P. notoginseng saponins.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tingting Wang,Xilong Cui,Shuang Cai,Xinshu Zou,Sidi Zheng,Yanhua Li,Zhiyun Zhang
The acquired drug resistance coupled with complex physiology and pathogenesis of biofilm challenges multidrug-resistant bacterial biofilm infection treatment. Herein, antimicrobial phytochemical isoliquiritigenin (ISL) loaded rhamnolipid (RL) modified chitosan nanoparticles (ISL@RL-CS) were constructed. The obtained ISL@RL-CS NPs were able to simultaneously eradicate methicillin-resistant Staphylococcus aureus (MRSA) biofilms at all stages and relieve accompanied inflammation. In the acid environment of biofilms, RL could be detached from the ISL@RL-CS and destroyed the biofilm structure. Then, the combination of phytochemical ISL and cationic chitosan could rapidly kill the dispersed bacteria, and inhibit the re-adhesion of residual bacteria, thus preventing the re-formation of new biofilms. Additionally, the inflammatory responses at the infection site were simultaneously alleviated by the anti-inflammatory features of ISL. In the MRSA-biofilm implant infected mice model, ISL@RL-CS demonstrated prominent biofilm eradication and anti-inflammation efficacy. Taken together, ISL@RL-CS with simple formulation but multi-functions provides a comprehensive and sustainable strategy for managing the intractable MRSA biofilm infections.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Jin Yuan Zhang,Ying Zhang,Yu Zou,Ze Li Bo Xu,Bo Zhang,Wang Ren
In this study, a facile fluorescence-scattering ratiometric sensor was designed for visual and selective detection of levodopa (LD) via a clever physicochemical modulation scheme. The alkalized products of LD can rapidly react with polyethyleneimine (PEI) to exhibit an intense blue fluorescence and decrease the second-order scattering (SOS) signal of PEI. As the concentration of LD increased, the fluorescence intensity at 420 nm increased and the SOS intensity at 675 nm decreased synchronously. Thus the fluorescence-scattering ratiometric sensor was constructed by virtue of the two simultaneously changed signals. Furthermore, red light-emitting Au nanoclusters (AuNCs) were added into the above mixture solution to enlarge the SOS signal and provide a stable red background fluorescence. The intensity ratio of fluorescence to SOS ( F /( S / S blank )) is linear dependent on C LD in the wide range of 50.0–––30000.0 nM, and LD as low as 50.0 nM can be identified with the naked eye via change of fluorescence color. The developed ratiometric sensor is smart, simple and efficient, and has been applied to the convenient assay of LD in real samples. The proposed physicochemical modulation strategy provides a new and facile path for selectively and visually identifying the target from its analogues.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lu Xu,Xiaojia Wei,Yuetong Qi,Wei Qiao,Juan Shi,Yabo Shang,Keqian Li,Xin Jin,Xue Bai,Xuan Shi,Pengkang Jin
The activation of persulfate (PS) in dissolved organic matter (DOM) solution using visible light has demonstrated potential for advanced wastewater treatment. This study presents a novel visible light-assisted homogeneous Fenton-like process (DOM-Fe 3+ -PS-Vis) for the efficient DOM degradation, based on the ligand-to-metal charge transfer (LMCT)-induced enhanced Fe 3+ reduction and PS activation. The simultaneous addition of Fe 3+ and PS to DOM-enriched solutions under visible light significantly improved PS activation, leading to the degradation of DOM and coexisting organic contaminants. The PS decomposition rate constant in the DOM-Fe 3+ -PS-Vis process was calculated to be 3.5–20.69 times higher than that of the DOM-PS-Vis, Fe 3+ -PS-Vis, and DOM-Fe 3+ -PS-Dark systems. Notably, over half of the decomposed PS in the DOM-Fe 3+ -PS-Vis process was activated by Fe 2+ generated via the LMCT between DOM and Fe 3+ . SO 4 − and OH were identified as the dominant reactive species present in the DOM-Fe 3+ -PS-Vis process with the steady-state concentration of 1.63–4.11 × 10 −13 M and 0.07 × 10 −13 M, respectively, which were 2.4–81.5 and 0.5–7 times higher than those in the DOM-PS-Vis, Fe 3+ -PS-Vis, and DOM-Fe 3+ -PS-Dark systems. Additionally, hydrophobic components with more aromatic carbon in DOM were found to promote the catalytic performance of the DOM-Fe 3+ -PS-Vis process. This study highlights the efficiency and promise of LMCT-induced enhanced Fe 3+ reduction and PS activation in DOM-enriched solutions under visible light for advanced wastewater treatment.
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iScience
·
2023
·
IF 5.8
Yuanyuan Zhang,Jie Zheng,Shiraku Margaret Linyerera,Richard Odongo Magwanga,Yuqing Hou,Yuhong Wang,Yanchao Xu,Aziz Khan,Shuxun Yu,Zhongli Zhou,Fang Liu,Xiaoyan Cai
Summary The 5′-deoxyadenosine deaminase (DADD), a member of the amidohydrolase family regulates biological purine metabolism. In this study, bioinformatic analysis, overexpression and knockdown of GhdadD gene were detected to identify its potential role in drought and salt stress tolerance. The results revealed that GhdadD was induced by ABA, Auxin, MBS and light responsive elements. In transgenic Arabidopsis, seed germination rate and root length were increased under drought or salt stress. GhdadD overexpressed seedlings resulted in higher plant height, less leaf damage and lower ion permeability. The expression of osmotic stress and ABA-responsive genes were up regulated. While in GhdadD -silenced cotton seedlings, CAT, SOD activity and soluble sugar content were reduced, MDA content was increased, and the stoma opening was depressed under drought or salt stress. Some osmics stress marker genes were also up regulated. These data indicating that GhdadD enhanced plant resistance to drought and salt stress through ABA pathways.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yi Li,Xinze Wu,Hui Lyu,Huaixia Chen,Xueping Dang
A novel polyaniline (PANI) coating doped with Zn 5 (H 2 L n ) 6 (NO 3 ) 4 (Zn 5 , H 3 L n =(1,2-bis(benzimidazole-2-yl)-ethenol) cluster on a stainless-steel wire was prepared by the electrodeposition method for the headspace solid-phase microextraction (HS-SPME) of nine volatile phenols. Scanning electron microscopy, Fourier transform infrared spectrometry, energy dispersive spectrometry and thermogravimetry were employed to characterize the morphology, composition, structure and thermal stability of the Zn 5 /PANI composite coating. The extraction efficiency of the Zn 5 /PANI composite coating for nine phenols was nearly 2 times higher than that of pure PANI coating. After the extraction conditions were optimized, an HS-SPME-gas chromatography-flame ionization detector (GC-FID) method was developed for the determination of nine phenols in water samples. The HS-SPME-GC-FID method had superior analytical performance with good linearities (0.05–50.0 μg/L) and low limits of detection (0.01–0.08 μg/L). Then, the proposed method was successfully applied for the determination of nine phenols in water samples with satisfactory recoveries (79.4–110.0%).
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EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2023
·
IF 3.3
Han Zhuoxuan,Zhang Jing,Wang Shuqi,Chen Haitao,Sun Jie,Zhang Ning,Zhang Huiying
As a kind of traditional fermented soybean food in China, douchi produced in Yangjiang is widely used in Cantonese cuisine and prepared foods and is exported to more than 30 countries. Yangjiang Douchi has a unique flavor and in-depth research on it can enhance its aroma quality. In this study, the key aroma-active compounds were characterized by the combined gas chromatography–olfactometry detection (GC–O) and gas chromatography–mass spectrometry (GC–MS) with sensory evaluation. In total, 39 aroma compounds were identified, and 18 of them with flavor dilution (FD) > 4 were determined. After quantifying, it was found that there were 12 aroma-active compounds with odor activity value (OAV) > 1. It was further verified that 9 aroma-active compounds contributed greatly to the aroma including acetic acid, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3-methylbutyric acid, maltol, guaiacol, phenylacetaldehyde, furanone, 3-methylthiopropanal and 1-methoxy-4-propenylbenzene. Sensory evaluations showed that the flavor profile mainly consisted of sauce-like, sour, nutty, smoky, caramel-like, and fruity notes.
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ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Bo Chen,Tao Zhou,Chunlong Zhao,Tao Huang,Xiaomeng Geng,Yan Wang,Youcai Zhao
A simple, efficient and low energy-consuming process available to generate resultful radicals from PMS for organic pollutants removal had been employed in this study. Slag had been used as the activator for organic pollutants degradation under slag/PMS advanced oxidation process . In this work, effects of slag with or without pretreatment on pollutant removal were studied and radical species generated by slag were measured. Calcination pretreatment is one efficient method to enhance the degradation efficiency significantly. Due to Fe 3 O 4 and Fe 2 O 3 became the dominant phases after calcination, it was about 8.6-flods increasing after comparing the pollutant removal efficiency for different slag/PMS system with calcination pretreatment or not. Organic pollutant neither degraded in PMS system at 25 °C nor being absorbed by slag system for 60 min. On the contrary, up to 90% pollutant concentration reduction achieved in the slag/PMS process. During this process, both • OH and SO 4 •- had been detected once slag and PMS interaction in wastewater. Through the free radicals quenching tests, • OH should be the key free radical in this advanced oxidation process for the organic pollutant removal under this alkaline condition. In general, organic degradation rate was determined by the slag dosage, and the maximum degradation efficiency was mainly controlled by the PMS usage. This work is expected to broaden the high-value reutilization way for industrial solid waste.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Kaiyang Xu,Yu Chen,Hua Yang,Yuyan Gan,Lizhi Wu,Li Tan,Yihu Dai,Yu Tang
Cyclohexanone is an important raw material for manufacturing nylon and other chemicals. The sustainable conversion of biomass derived molecules to cyclohexanone is desired but still challenging. Herein, a palladium single atom catalyst anchored in the micropores of zeolite (namely Pd 1 /ZSM-5) is designed and exhibits remarkable catalytic activity in transforming anisole to cyclohexanone in water medium (H 2 O), without using of organic solvent or halogen promoter. The selectivity to cyclohexanone is 91.2% and the turnover rate (TOR) is 400.8 h −1 at 453 K. The Pd sites, acid sites, and microporous confinement environment of zeolite cooperate to promote the partial hydrogenation to cyclohexanone, and inhibit further hydrogenation as the side reaction. H 2 O not only acts as the solvent, but also participates significantly in the partial hydrogenation. Moreover, as revealed by isotope labelled experiments (D 2 O and H 2 18 O), the water participated hydrogenolysis and the consequent partial hydrogenation mechanism is proposed.
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Science China-Technological Sciences
·
2023
·Vol. 66
·期 7
·2134-2146
·
IF 4.6
Wang ShengLiang,Xu ZhiJun,Chen HaiXu,Wang XiaoLiang,Lin Song,Wang Lei,Liu XiaoMan,Huang Xin
The biointerface engineering of living cells by creating an abiotic shell has important implications for endowing cells with exogenous properties with improved cellular behavior, which then boosts the development of the emerging field of living cell hybrid materials. Herein, we develop a way to perform active nanoencapsulation of single cell, which then endows the encapsulated cells with motion ability that they do not inherently possess. The emerging motion characteristics of the encapsulated cells could be self-regulated in terms of both the motion velocity and orbits by different proliferation modes. Accordingly, by taking advantage of the emergence of differentiated moving abilities, we achieve the self-sorting between mother cells and daughter cells in a proliferated Saccharomyces cerevisiae cell community. Therefore, it is anticipated that our highlighted study could not only serve as a new technique in the field of single-cell biology analysis and sorting such as in studying the aging process in Saccharomyces cerevisiae , but also open up opportunities to manipulate cell functionality by creating biohybrid materials to fill the gap between biological systems and engineering abiotic materials.
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危险品化学品经营许可证（带存储）