TALANTA
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2025
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IF 6.1
Mengting Liu,Zuncai Gu,Lu Qian,Kawtar Ettayri,Tao Deng,Chenhao Zhang,Jing Qian,Xingyi Huang,Chengquan Wang
Oxytetracycline (OTC), a broad class of antibacterial medication, has been widely utilized in poultry husbandry and fish farming. However, the presence of OTC residues in the food has become a matter of great concern. These residues have the potential to induce the emergence and spread of bacterial resistance, which can have far-reaching consequences for public health. In this work, we focused on the comparison of the quenching efficiency of UiO-66 and its amino group-modified counterpart UiO-66-NH 2 , towards the fluorescence of nitrogen-doped graphene quantum dots (NGQDs) labeled aptamer (NGQDs-apt). It was found that UiO-66-NH 2 demonstrated a more potent fluorescence quenching ability towards NGQDs-apt, as high as 98.8 %, compared to 69.7 % for UiO-66 without amino functionalization. This enhanced performance is attributed to the improved interaction between the amino groups on UiO-66-NH 2 and the NGQDs-apt, facilitating more effective electron transfer. Consequently, UiO-66-NH 2 was selected as the optimal quencher for the development of a highly sensitive aptasensor. This aptasensor demonstrates a quantitative detection range for OTC spanning from 0.001 to 200 μM with an exceptionally low detection limit of 0.25 nM, showing simplicity, accuracy, stability and great potential for antibiotic residue detection in food samples. This work addresses the urgent need to develop reliable methods for detecting OTC residues in food due to the potential of OTC to trigger bacterial resistance, which is crucial for food safety and public health.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
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IF 6.6
Mantang Chen,Shucai Gao,Ruihong Liu,Xiaoyu Wang,Cong Nie,Fuwei Xie,Haidong Gao,Libin Wan
Fluoroquinolone (FQ) contamination is a major food safety concern. Therefore, it is imperative to establish an efficient and sensitive method for detecting FQ residues in food. This study describes the synthesis of an imprinted metal-organic framework (MOF) via an in situ template self-assembly method using pipemidic acid as a dummy template for extracting FQs. The imprinted MOF exhibited superior specific recognition ability and a high selectivity towards FQs, making it a suitable adsorbent for molecular imprinted polymer based solid-phase extraction (MIP-SPE). Several extraction parameters, including adsorbent dosage, extraction time, pH, and elution solvent type, were optimised. Under the optimised conditions, a good linearity of the developed MIP–SPE–LC–MS method for the six FQs was obtained, with R 2 values of >0.9946 at concentrations of 0.5–50 μg L -1 for milk and 0.5–50 μg kg -1 for pork. The method had low detection limits (0.02–0.12 μg L -1 for milk and 0.03–0.12 μg kg -1 for pork). Moreover, satisfactory recoveries (70.2–113.6%), good repeatability (0.9–5.7%), and high precision (0.3–8.3%) were achieved for all the six FQs in milk and pork samples. This method is reliable and suitable for determining trace FQ residues in food samples, thereby contributing to the safety control of food industry.
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Journal of Water Process Engineering
·
2025
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IF 6.7
Guangqian Kuang,Huijuan Cao,Xiangyong Zheng,Yishi Lin,Xingmin Jin,Min Zhao,Wenjuan Han
Antibiotics in wastewater present significant ecological risks. However, their effects on nitrogen (N) removal and greenhouse gas (GHG) emissions in constructed wetlands (CWs) have been largely neglected in previous studies. This study investigated the effects of antibiotics on N removal and GHG emissions in earthworm-enhanced CWs constructed with three earthworm densities (0 g m -2 , 156 g m -2 , and 312 g m -2 ). The results showed that (1) antibiotics significantly increased effluent total inorganic nitrogen (TIN) concentrations by 49.17 % in systems with the high-density earthworm, whereas no significant effects were observed in the other treatments; (2) in systems without earthworms, antibiotics significantly reduced N₂O emissions by 139 %. In systems with low-density earthworms, CH₄ and CO₂ emissions were significantly reduced by 366 % and 70.3 %, respectively. In contrast, in high-density earthworm systems, N₂O emissions significantly increased by 289 %; (3) antibiotics led to a significant reduction in non-CO₂ global warming potential (GWP non-CO₂ , -143 %) in the systems without earthworms and a reduction in total global warming potential (GWP CH₄+N₂O+CO₂ , -57.3 %) in the systems with low-density earthworms. However, both indices significantly increased by 289 % and 51.2 % in systems with high-density earthworms; (4) antibiotics altered the microbial community composition and significantly increased nitrite reductase activity in the systems with low-density earthworms (+24.5 %) but significantly decreased it in systems with high-density earthworms (-33.0 %). In summary, antibiotic contamination markedly influenced both N removal performance and GHG emissions in earthworm-enhanced CWs, with effects varying depending on earthworm density.
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ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Jian Song,Hai-Long Qian,Shu-Ting Xu,Cheng Yang,Xiu-Ping Yan
Efficient extraction of perfluoroalkyl and polyfluoroalkyl substances (PFAS) poses a significant challenge for water treatment and food safety. Here, we report a multifunctional covalent organic framework (COF) for the selective and efficient extraction of PFAS. A facile room-temperature imine condensation of two monomers, 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (BTFDA) and 1,3,5-triformylphloroglucinol (Tp), produced a multifunctional COF (TpBTFDA). TpBTFDA was rationally designed to synergistically integrate chemical moieties capable of leveraging both fluorophilic (via trifluoromethyl groups) and hydrogen bonding (via β-ketoenamine linkages) interactions with PFAS molecules. Batch adsorption experiments, coupled with systematic comparative studies against control COFs (lacking either the fluorophilic or hydrogen-bonding sites), revealed that this synergistic interplay is essential for the efficient capture of PFAS, demonstrating that both interaction mechanisms are indispensable. Consequently, the TpBTFDA exhibited exceptionally high adsorption capacities (379–521 mg g–1) for eight PFAS. The fabricated TpBTFDA was applied to develop a selective solid-phase extraction method for UHPLC-MS/MS determination of PFAS. The developed method showed a wide linear range (0.01–200 μg L–1), low detection limits (0.006–0.59 μg L–1), good precision (RSD ≤ 5.2%), and recovery (83.0–112.3%) for the accurate determination of PFAS in real water and food samples. This study underscores the potential of rationally designed COFs for effectively enriching and detecting PFAS in practical applications.
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ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Jiayue Zhou,Dongmei Li,Ziwei Chen,Tiantian Li,Ying Liu,Jie Nan,Linyuan Wang,Yinuo Chen,Guanggui Yu,Na Sai
Inspired by the color patterns of blue-winged teals’ feathers, a new biomimetic imprinting (IM) probe with chemical fluorescent (CF) color and physical structural (PS) color was developed for the label-free and ratiometric detection of levofloxacin (LOF). The probe is defined by a periodic photonic crystal structure formed by monodisperse imprinting microspheres that incorporate LOF-binding nanocavities, similar to the color emission structure of teals. With the increase of the LOF solution, the probe can selectively bind LOF molecules and demonstrate a two-color response without the use of labels: the CF color emerged from the entering of CF color-emissive LOF molecules, further enhanced by the Purcell effect, while the PS color resulted from the periodic photonic crystal structure. As the concentration of LOF increases, the CF color becomes brighter (turn on), while the PS color becomes darker (turn off). These color changes are perceptible to the naked eye. The probe demonstrated label-free, sensitive (down to 2.77 nmol/L), rapid (10 min), selective, and stable detection of the LOF, utilizing a self-correction function of colors. In addition, the probe was successfully applied in real sample detection.
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BIORESOURCE TECHNOLOGY
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2025
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IF 9
Fang Zhao,Zhao Yang,Jingjing Wang,Mark Bartlam,Yingying Wang
Misuse of antibiotics drives the spread of antibiotic resistance genes (ARGs). Although reducing residual antibiotic concentrations can help curb ARG proliferation, the biodegradation and transformation of antibiotic stereoisomers may exacerbate resistance development. However, the impact of antibiotic enantiomers on ARG proliferation remains poorly understood. This study employed metagenomic analysis to investigate the enantiomer-specific selection and resistance risks of chiral antibiotic ofloxacin (OFL) and its ( S )-enantiomer, levofloxacin (LEV), in activated sludge. Results showed that LEV primarily promoted the enrichment of ARGs related to aminoglycoside and mupirocin resistance by selecting for pathogenic bacteria carrying virulence factors under high toxicity stress. OFL-driven ARG proliferation involved more diverse mechanisms, including increased gene mobility, co-selection with heavy metals, broader host range, and elevated pathogenicity. The antibiotic resistome risk index (ARRI) further demonstrated a higher environmental risk under OFL treatment than LEV. These findings offer critical insights into the enantioselective resistance risks posed by chiral antibiotics.
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DESALINATION
·
2025
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IF 9.8
Xin Wang,Yicheng Wang,Xiao Sun,Xiaowen Cui,Tinghui Wu,Ting Wang,Yiran Luo,Yongqi Yang,Mengzhu Liu,Yongpeng Wang,Zhe Chen,Jing Li
Solar-driven interfacial evaporation (SDIE) represents a sustainable pathway for the co-production of freshwater and electricity, offering a promising solution to global water scarcity and energy deficits. However, the development of low-cost, easily fabricated, highly efficient, and salt-resistant water-electricity cogeneration systems remains a significant challenge. Herein, we fabricate a robust and cost-effective 3D solar evaporator (3D-CSC/SA@CF) by integrating corn straw-derived carbon (CSC), discarded cigarette filters (CF), and sodium alginate (SA) hydrogel. In this configuration, the CF scaffold serves as a hydrophilic, quasi-aligned porous substrate for rapid water transport, while the CSC layer functions as an efficient broadband solar absorber, endowing the evaporator with a high light absorption of 97.15 %. Benefiting from its abundant hydrophilic groups and rationally designed porous structure, the evaporation enthalpy is significantly reduced to 851 J g −1 —far below that of pure water. As a result, the evaporator achieves an evaporation rate of 4.52 kg m −2 h −1 under one-sun irradiation (1 kW m −2 , AM 1.5G), with a corresponding solar-to-vapor efficiency of 97.01 %. The system also exhibits remarkable salt-rejection performance, maintaining a stable evaporation rate of 3.22 kg m −2 h −1 in 20 wt% NaCl brine without salt accumulation, and effectively removes heavy metal ions, organic dyes, and antibiotics from simulated wastewater. Furthermore, we construct an integrated thermoelectric cogeneration system based on the evaporator, which delivers a maximum output power density of 307.1 mW m −2 under 1 sun illumination. This work not only demonstrates a sustainable waste-to-resource strategy but also provides a feasible and scalable approach to multifunctional hydro-energy cogeneration, highlighting its potential for practical applications in remote and resource-limited regions.
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Journal of the American Chemical Society
·
2025
·
IF 15.6
Jiaxian Wang,Yunjie Zou,Chengliang Mao,Long Zhao,Ruizhao Wang,Jie Dai,Xingyue Zou,Yan Zhang,Qian Zheng,Bing Zhou,Huan Yang,Yancai Yao,Lizhi Zhang
Efficient defluorination of persistent fluorinated pollutants remains a critical challenge, as conventional oxidant-dependent methods suffer from limited efficacy and poor interference resistance. While enzymatic oxygen transfer defluorination employs high-valent metal-oxo (HVMO) species for selective C–F bond cleavage, replicating this process via an oxidant-free electrochemical synthesis has been elusive. Here, we report an oxidant-free electrochemical platform using low-valent Ir single atoms (+2.0) on titanium foam (L-Ir1/TF) to generate high-valent Ir-oxo (HVIO) species directly from H2O. The higher d-electron count of low-valent Ir enhanced π-backdonation from Ir 5d to O 2p orbitals, concentrating charge density on the axial oxygen. This elevated electrostatic repulsion suppresses competitive *OOH formation, achieving an exceptional HVIO production rate of 16,920 μmol h–1 gIr–1, 1.7 times higher than its high-valent Ir single atom (+4.3) counterpart (H-Ir1/TF). The resultant HVIO species on L-Ir1/TF selectively cleaved C–F bonds via electrophilic addition, achieving 99.4% fluconazole defluorination in 5 h (surpassing H-Ir1/TF by 2.3 times and PbO2 by 6.7 times). This work establishes single-atom oxidation-state engineering as a new paradigm for green HVMO synthesis, enabling the sustainable degradation of recalcitrant fluorinated contaminants.
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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2025
·
IF 2.9
Hu Wenquan,Chen Zhikang,Chen Qi,Zhu Xixi,Qin Yifan,Wang Ming
Heterogeneous photocatalysis has been widely recognized as one of the most effective methods for organic wastewater treatment. In this study, ZnFe 2 O 4 /ZnO nanocomposite were successfully synthesized via a one-step hydrothermal method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), UV–Visible diffuse reflectance spectroscopy (DRS), and Brunauer–Emmett–Teller specific surface area analyzer (BET). The photocatalytic activities of ZnFe 2 O 4 /ZnO nanocomposites were evaluated in the degradation of organic pollutants under ultraviolet irradiation. The results demonstrate that ZnFe 2 O 4 /ZnO nanocomposites exhibited superior photocatalytic activity in degrading methylene blue (MB), ofloxacin antibiotic (OFL), and sulfadiazine (SDZ), which the degradation rates for MB, OFL, and SDZ were 95.90%, 75.83%, and 72.32%, respectively, with corresponding degradation times of 70 min, 160 min, and 90 min. These values represented respective improvements of 30%, 47.03%, and 27.72% compared to ZnFe 2 O 4 nanomaterials, as well as enhancements of 2.05%, 19.53%, and 19.52% relative to ZnO nanomaterials. The formation of ZnFe 2 O 4 /ZnO heterostructure effectively suppressed electron–hole recombination, thereby significantly enhancing both the activity and stability of the photocatalysts. Furthermore, The findings from the photocatalytic cyclic degradation experiment demonstrate that the ZnFe 2 O 4 /ZnO nanocomposites exhibit excellent reusability as photocatalysts and hold significant potential for application in the treatment of industrial wastewater containing organic pollutants.
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