Analytical Methods
·
2024
·
IF 2.7
Gaoshuang Hu,Ziyang Liu,Yiqin Zhang,Tao Zhao,Zhuqing Xing,Shan Gao,Jianxiong Hao
Long-term consumption of foods with excessive enrofloxacin (ENRO) residues may cause the accumulation of ENRO in the human body, thus damaging human health. In this study, quantum dot-based biomimetic fluorescence immunoassays were used for enrofloxacin detection in food of animal origin. Under the most suitable conditions, the detection limit (IC15) of the method in standard solution was 0.13 ± 0.02 ng L−1 and the sensitivity (IC50) was 0.13 ± 0.18 μg L−1. The recoveries for ENRO from four fortified food samples, including chicken, eggs, shrimp, and milk, ranged from 85.74% to 114.19% and the coefficients of variation were 0.01–18.09%. The established method shows good agreement with the results obtained using commercial ELISA kits, with a correlation coefficient of 0.997. The proposed method shows the advantages of high sensitivity, specificity and wide detection range. It can be used as an alternative method for the rapid and sensitive detection of ENRO in food of animal origin.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Liusha Cen,Fan Yu,Shixue Liu,Chengcai Li,Wangyong Jin,Chenliang Wang,Hailin Zhu,Yuhai Guo
The technology that catalyst activated perxymosulfate (PMS) has been widely used in the decomposition of organic pollutants. We prepared Zn and Co-based ZIF and obtained C-doping Co 3 O 4 / ZnO heterojunction after pyrolysis. C-doping Co 3 O 4 / ZnO heterojunction with cage core-shell structure was loaded on the polyvinylidene fluoride (PVDF) membranes with a layered porous structure by solvent-assisted nanoparticle embedding (SANE) method, where the carmine degradation reached 99.6 % by MC-430 activated Perxymosulfate (PMS) within 10 min. The influencing factors (such as the pyrolysis temperature, PMS dosage, and dye concentration) on OFX degradation were observed, and MC-430 exhibited good tolerance for these factors and a wide range of solution hydrogen ion concentrations (pH= 4–10). The strong reusability and stability analysis showed that the carmine degradation of the MC-430/PMS system changed minorly (from 99.6 % to 97.7 %) in 5 consecutive cycles without any treatment. The degradation mechanism was confirmed by capture experiments, in which the non-free radical path was the main one and the free radical path was the auxiliary one. Moreover, structure characterizations and density functional theory calculations verified that doped C sites provided a channel for electron transfer from Zn sites to Co sites, which increased the generation rate of reactive oxygen species (ROS) and prolonged the catalyst life. This work provides a new method for the preparation of nonmetallic doping bimetallic strong coupling catalysis.
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Yating Ai,Sónia A.C. Carabineiro,Xianqiang Xiong,Huayue Zhu,Qi Wang,Bo Weng,Min-Quan Yang
Emerging contaminants in water sources present serious environmental and health risks, creating an urgent need for efficient and reliable treatment strategies. Photocatalytic advanced oxidation processes (AOPs) provide rapid reaction rates and strong oxidation capabilities, however, comprehensive evaluations of wastewater treatment, including degradation pathways, toxicity assessments and mechanistic insights, remain underexplored in the literature. This study presents novel S-scheme Mn 0.5 Cd 0.5 S/In 2 S 3 (MCS/IS) photocatalysts for efficient degradation of antibiotic pollutants, with a particular focus on tetracycline hydrochloride (TCH). The optimized MCS/IS photocatalyst demonstrates exceptional degradation efficiency and robust resistance to inorganic anions. Additionally, a continuous-flow wastewater treatment system, using an MCS/IS membrane, demonstrates outstanding stability in TCH photodegradation. Utilizing response surface methodology and Fukui function analysis, the effects of various parameters on photocatalytic degradation rates, along with the associated pathways and intermediate products, have been thoroughly investigated. Toxicity assessments confirm the environmental safety of the treated effluents. Mechanistic studies show that the S-scheme heterojunction in the MCS/IS photocatalyst improves electron-hole separation, thereby enhancing photocatalytic performance. It is expected that this study will serve as a model for advancing the removal of emerging contaminants, further enhancing photocatalytic AOPs as sustainable water purification technologies.
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APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Yuqi Zhang,Yunan Zhong,Pengfei Zhang,Yang Zheng,Chunfang Du
Halloysite nanotubes (HNTs) served as the support and aluminum source for in-situ synthesizing CoAl 2 O 4 /HNTs (CAO/HNTs), which acted as an effective catalyst to activate peroxymonosulfate (PMS) for degrading tetracycline hydrochloride (TC). To achieve the optimal removal performance, various parameters were optimized. The final CAO/HNTs demonstrated a high degradation efficiency of 88 % toward TC within 40 min, which was 1.69 times as high as that of pure CAO. The existence of HNTs made CAO highly dispersed, increasing the number of exposed active sites and the contact opportunities between CAO and TC molecules, which enabled CAO to participate in the reaction more effectively and thus improved the degradation efficiency. Additionally, the formation of Co-O-Al bonds facilitated the growth of CAO into a three-dimensional (3D) spherical structure with more active sites other than the tetrahedral structure on HNTs. In the CAO/HNTs/PMS system, O 2 •– and 1 O 2 contributed mostly to the catalytic process. This work not only provides a novel catalyst for the treatment of antibiotic pollution, but also offers an innovative strategy for fabricating functional materials on the basis of chemical composition and morphology characteristics of natural minerals.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shuyuan Guo,Miao Liu,Hanlin Liu,Jingru Mao,Yongfeng Zou,Li-Peng Sun,Yan Huang,Dandan Sun,Jie Ma
A reflective microfiber biosensor with fiber Bragg grating (FBG) is presented for detecting flumequine (Flu) concentration through successive surface modification with polydopamine (PDA) and europium-incorporated covalent organic framework (Eu@COF). The detection mechanism relies on refractive index (RI) changes induced by Flu adsorption, which are monitored by tracking of interference wavelength shifts. Experimental results demonstrate that the sensor exhibits a significant response within a concentration range of 0.1–100 μM, achieving a sensitivity of 0.732 nm/μM in the 0.1–1 μM range with a limit of detection (LOD) of 0.1 μM. Furthermore, the biosensor demonstrates the exceptional specificity for Flu detection among various quinolone antibiotics, while delivering reliable detection in real samples. With the integrated advantages of high sensitivity, superior selectivity, and long-term stability, this sensing platform shows the promising potential for on-site monitoring applications in food safety supervision and veterinary drug residue analysis.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Baoting Tan,Jia Yan,Yiwen You,Xujie Cao,Zhilong Song
Environmental residues of fluoroquinolone antibiotics have become a major threat to both ecosystems and human health, necessitating the development of highly efficient adsorbents with molecular recognition capabilities. This study presents a novel class of WO 3− x quantum wire (QWs) designed to address the limitations of traditional adsorbents, particularly poor selectivity and difficult regeneration processes. We successfully fabricated sub-2 nm ultrathin WO 3− x QWs with enriched with W 5 + /W 6+ active sites and surface functional groups through a precise solvothermal method. The resulting WO 3−x QWs demonstrated exceptional selectivity for fluoroquinolone antibiotics, achieving > 90 % removal efficiency for ciprofloxacin, norfloxacin, and ofloxacin, in contrast to much lower removal rates for common dyes like rhodamine B and methylene blue, as well as other antibiotics like tetracycline hydrochloride. Comprehensive characterizations, including thermodynamic and kinetic models, revealed three key molecular recognition mechanisms driving this high performance. Furthermore, when incorporated into a composite membrane, the QWs demonstrated outstanding performance in continuous filtration, showing high removal efficiency, rapid adsorption, and long-term stability. This study not only provides a new class of efficient adsorbent materials for antibiotic treatment, but also offers fresh insights into the development of functional materials with molecular recognition properties for broader applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wei Chen,Bing-Xin Gu,Yi-Jie Zhang,Hao Zheng,Yan-Li Ji,Quan-Fu An,Cong-Jie Gao
Rising global demand for antibiotics drives the development of nanofiltration (NF) membrane separation technology. However, traditional NF membranes face structural hurdles in practice, mainly the permeability-selectivity trade-off and poor separation precision for multi-component fermentation broths. We proposed a polyelectrolyte gel confined crystallization strategy to in-situ grow ZIF-8 crystals within a poly (acrylic acid)/polyethyleneimine (PAA/PEI) matrix, constructing a hybrid membrane (PAA/PEI@ZIF-8M) with high hydrophilicity, rigid interconnected pores, and good stability. By precisely controlling crystallization kinetics under nano-confinement, the membrane achieves synergistic integration of ZIF-8 molecular sieving and polyelectrolyte networks, and eliminates interfacial defects. The resultant PAA/PEI@ZIF-8M membrane exhibits a high water permeance of 35.3 L·m −2 ·h −1 ·bar −1 –12-fold improvement over the pristine PAA/PEI membrane, along with high selectivity for chlortetracycline hydrochloride (OTC)/sucrose (∼8.0) and OTC/NaCl (∼5.0). Simultaneously, ZIF-8 nanocrystals in PAA/PEI gel act as anti-deformation pillars, while covalent crosslinking and multiple coordination interactions form a stabilized network, resulting in a good and stable separation performance during long-term running process. Moreover, multistage purification tests confirm industrial feasibility, yielding OTC with 97 % purity and a 2-fold concentration increase, meeting pharmaceutical-grade standards. This strategy establishes a novel paradigm for designing stable and high-performance polyelectrolyte gel NF membranes, advancing sustainable antibiotic production.
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CHIRALITY
·
2025
·Vol. 37
·期 8
·e70050
·
IF 3
Xiangwen Chen,Xuan Chen,Juan Pan,Shuqi Deng,Qiubing Qin,Qiang Fu,Jiliang Cao
In this work, the silica gel bonded amylose[( S )-α-methylbenzyl carbamate] (CHIRALPAK IH) was chosen as the chiral stationary phase (CSP) for the separation of five quinolone enantiomers by high-performance liquid chromatography (HPLC), namely, ofloxacin, flumequine, nadifloxacin, lomefloxacin, and clinafloxacin. The mobile phase composition, organic modifier, and acid–base additive were systematically investigated for the baseline separation of these five interested quinolones. The optimized mobile phases were n -hexane–ethanol–acetic acid–diethylamine (60:40:0.2:0.2, v / v / v / v ) for ofloxacin and nadifloxacin, n -hexane–ethanol–acetic acid–diethylamine (60:40:0.2:0.2, v / v / v / v ) for flumequine, n -hexane–isopropanol–acetic acid–diethylamine (60:40:0.3:0.3, v / v / v / v ) for lomefloxacin, and n -hexane–ethanol–acetic acid–diethylamine (70:30:0.3:0.3, v / v / v / v ) for clinafloxacin. The interaction forces between the amylose CSP and target quinolones were simulated by computerized molecular docking to study their enantiorecognition mechanisms. The results indicated that hydrogen bonding, π–π stacking, and hydrophobic interactions collectively contributed to the stereoselective binding. The differences in these interaction forces between the quinolone enantiomers, particularly the greater contribution of hydrogen bonding in one enantiomer compared to the other, led to a significant difference in binding energy. This differential binding energy ultimately governed the elution order and enabled chiral recognition of the five quinolone enantiomers.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Di Zhao,Yanmei Shi,Chenqing Zhang,Zhihong Chen,Weixia Zhu,Shusheng Zhang,Kai Hu
A zwitterionic covalent organic framework was synthesized and applied as SPME blade coating for the extraction of fluoroquinolones in lake water and milk samples. The structure and functional groups of the sorbent were characterized via SEM, XPS, FT-IR, and XRD. Adsorption kinetic/isotherm analyses demonstrated chemisorption-driven monolayer adsorption with high affinity. Under the optimal SPME conditions, a high-throughput extraction method was established by incorporating zwitterionic covalent organic framework-coated blades into a 24-well plate system, which was subsequently coupled with LC-MS/MS for analysis. The proposed method exhibited good linearity (0.01–10 ng mL −1 , R 2 ≥ 0.9938), achieving LODs of 0.1–2.5 pg mL −1 in lake water and 0.2–2.8 pg mL −1 in milk, while recoveries were in the range of 72.3 %–124.7 % with RSD < 10.3 %. This approach provides an effective strategy for monitoring trace fluoroquinolones in environmental and food matrices, showcasing the potential of DBS-EB-COF-enhanced high-throughput SPME systems for applications in environmental and food safety surveillance.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Wanyue Pang,Ruoyu Cao,Shuaijie Guo,Shuo Wang,Xuelian Hu,Yiwei Tang,Xiuying Liu
A versatile fluorescent molecularly imprinted nanosensor (MIPs@O-CDs) for profiling ciprofloxacin (CIP) was innovatively developed using a controllable post-imprinting modification strategy. High-affinity molecularly imprinted polymers (MIPs) as recognition elements granted nanosensor favorable anti-interference. Bright orange-emission carbon dots (O-CDs) as signal transducers demonstrated prominent reverse fluorescence response to CIP due to inner filter effect, ameliorating detection sensitivity and accuracy. Benefiting from inherent advantages, MIPs@O-CDs accomplished selectivity and ultrasensitive ratiometric fluorescence detection of CIP with a linear range of 0.025–6.000 μg mL −1 , a detection line (6.858 ng mL −1 ), a rapid response time (1.5 min) and a distinguishable color transformation (orange-pink-purple). Additionally, a portable optosensing platform has been triumphantly established by integrating MIPs@O-CDs and smartphone-assisted detectors, which achieved precise on-site determination of CIP in milk with satisfactory recoveries (88.185–93.267 %) and a relative standard deviation below 3.960 %. Accordingly, MIPs@O-CDs-based platform demonstrated portability, feasibility, selectivity, and sensitivity, presenting a powerful tool for real-time food safety assessment.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Feiyan He,Jilai Gong,Juan Li,Jun Zhao,Huaiyang Zhou,Yewei Wang,Yanzhao Hu
Nanofiltration (NF) membranes are part of the promising technologies for treating antibiotic wastewater. However, current NF membranes are constrained by the trade-off between the water permeability and selectivity. To address this challenge, a (2-Hydroxypropyl)-β-cyclodextrin (OH-β-CD) incorporated into nitrogen-doped quantum dots (N-GQDs) aqueous phase to form the membrane (N-CD 0.1 ). The integration of the OH-β-CD manipulated the structural properties of selective layer and improved the water permeability. This was attributed to the fact that OH-β-CD not only provided an additional priority water channel, but also regulated the interfacial polymerization process of the membrane by slowing down the diffusion rate of N-GQDs. In addition, the hydrophilicity and electronegativity of the membrane were optimized by OH-β-CD. The results showed that the N-CD 0.1 membrane achieved a high antibiotic rejection (Ciprofloxacin: 98.28 %, Norfloxacin: 97.9 % and Ofloxacin: 97.46 %). The N-CD 0.1 membrane had a remarkable water permeability of 15.82 L⋅m −2 ⋅h −1 ⋅bar −1 , which was 2.05-fold that of the N-GQDs membrane. Furthermore, the N-CD 0.1 membrane exhibited good high-pressure stability. When the operating pressure was 3 ∼ 7 bar, the N-CD 0.1 membrane still had a high Ciprofloxacin rejection (> 97 %). Therefore, by the addition of OH-β-CD, the water permeability of NF membrane could be further improved almost without sacrificing the rejection of Ciprofloxacin, which provided a green and efficient strategy for the fabrication of high-performance NF membranes.
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ACS Nano
·
2025
·
IF 16
Jing Wu,Guang Yin,Fan-Zhen Jiao,Zhi-Hao Wang,Zhi-Guo Jiang,Zhe Chen,Zhong-Zhen Yu,Jin Qu
Although solar steam generation has been combined with photocatalytic degradation for purifying wastewater, the inherent synergistic effects on enhancing solar-thermal water evaporation and photodegradation are poorly understood. Herein, synergistic solar-thermal and photocatalytic purification of wastewater triggered by photoexcited electron transfer and spin polarization is realized by designing a flow-bed water purification system with a bacterial cellulose/α-Fe2O3 nanodisk/carbon nanotube (BFC) composite film for the continuous solar-thermal evaporation of water and simultaneous photocatalytic degradation of organic pollutants. The photogenerated electrons in the 3dx2–y2 orbitals of the Fe atoms of α-Fe2O3 can transfer to the 2pz orbitals of the C atoms of carbon nanotubes, induced by the work function differences. The separation of photogenerated carriers is enhanced by the built-in electric field and the spin polarization effect, generating more active redox species to improve the photocatalytic degradation performance. Moreover, the photoexcited electrons injected into the carbon nanotubes can participate in solar-thermal conversion via a relaxation process to generate more heat, promoting solar steam generation performance. A flow-bed water purification system is established on the basis of the synergistic solar-thermal/photocatalytic effects for efficiently purifying various wastewater. The purified water is eligible for direct irrigation of crops without any obvious inhibition phenomena.
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