Journal of Environmental Sciences
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2024
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IF 5.9
Yanan Li,Yaning Wu,Kai Guo,Weiqin Wu,Meijing Yao
During the water treatment process, chlorination and ultraviolet (UV) sterilization can modify microplastics (MPs) and alter their physicochemical properties, causing various changes between MPs and other pollutants. In this study, the impact of chlorination and UV modification on the physicochemical properties of polystyrene (PS) and polyvinyl chloride (PVC) were investigated, and the adsorption behavior of pefloxacin (PEF) before and after modification was examined. The effect of pH, ionic strength, dissolved organic matter, heavy metal ions and other water environmental conditions on adsorption behavior was revealed. The results showed that PS had a higher adsorption capacity of PEF than PVC, and the modification increased the presence of O-containing functional groups in the MPs, thereby enhancing the adsorption capacity of both materials. Chlorination had a more significant impact on the physicochemical properties of MPs compared to UV irradiation within the same time period, leading to better adsorption performance of chlorination. The optimal pH for adsorption was found to be 6, and NaCl, sodium alginate and Cu 2+ would inhibit adsorption to varying degrees, among which the inhibition caused by pH was the strongest. Chlorination and UV modification would weaken the inhibitory effect of environmental factors on the adsorption of PEF by MPs. The main mechanisms of adsorption involved electrostatic interaction and hydrogen bonding. The study clarified the effects of modification on the physicochemical properties of MPs, providing reference for subsequent biotoxicity analysis and environmental protection studies.
研究领域:
环境科学
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水处理技术
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毒理学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Tien Tran Nguyen,Minh Kim Nguyen,Vipin Kumar,Ha Huu Do,Anh Thi Kim Le,Anh Van Nguyen,Jin Seog Gwag,Pham Cam Nam,Le Gia Trung
The widespread use and subsequent release of antibiotics by humans and animals pose health and environmental risks, compelling their removal from aquatic ecosystems. MIL-101(Cr), a metal-organic framework (MOF), exhibits versatile applications in antibiotic adsorption owing to its exceptional structural characteristics. In this context, MIL-101(Cr) nanoparticles are successfully prepared via the hydrothermal method to remove pefloxacin (PEF) from aqueous solutions. The resulting MIL-101(Cr) adsorbents showcase high crystallinity (97.6%), a large surface area (3166 m 2 /g), broad nanopore sizes, good thermal stability, and efficient reusability. Factors including initial PEF concentration, pH, dosage of adsorbent, and temperature are thoroughly investigated. The findings reveal a good adsorption capacity (254.3 mg/g) with an optimal removal efficiency (99.7%) at 308 K in a neutral pH of 7.0 when the adsorbent dosage is 250 mg/L and the initial PEF concentration is 200 mg/L within 80 min of contact. Among the three adsorption isotherms (Langmuir, Freundlich, Temkin models), the Langmuir equation best fits the studies, indicating a maximum adsorption capacity of 253.8 mg/g at 25°C, while the experimental equilibrium adsorption capacity is 229.2 mg/g at the same temperature. Adsorption kinetics aligns with the pseudo-second-order model. Thermodynamic parameters and activation energy affirm the endothermic and spontaneous behavior of the adsorption process, attributed to both physisorption and chemisorption. This study highlights the promising potential of synthesized MOF nanocrystals as an effective adsorbent for antibiotics in wastewater treatment and environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Jie Zhao,Xiao Guo,Qiang He,Qiang Song,Fei Wu,Chenhui Zhang
A novel solvothermal process for synthesizing InNbO 4 nanomaterials was developed. In this manner, a series of InNbO 4 samples was synthesized. It was shown that reaction temperature and precursor pH had strong influence on the attributes of InNbO 4 samples. The X-ray diffraction patterns revealed that all the samples possessed monoclinic structure and the optimal reaction condition was found at 250 °C with a pH of 5. Scanning electron microscopy images of different InNbO 4 samples showed various morphologies. Transmission electron microscopy verified the synthesized InNbO 4 -pH 5 was single-crystal cubes . X-ray photoelectron spectra verified the existence of In, Nb, and O in InNbO 4 -pH 5 sample. The band gap of InNbO 4 -pH 5 was calculated to be 2.51 eV. The photocurrent intensity of InNbO 4 -pH 5 was the highest among the prepared samples. The photocatalytic degradation of pefloxacin was investigated using these samples. The InNbO 4 -pH 5 exhibited best degradation efficiency among these samples. The removal efficiency of pefloxacin with InNbO 4 -pH 5 could reach 80.2% in 60 min. Based on free radical capture results, superoxide radicals and holes showed to be the dominant active species. In addition, UHPLC/MS/MS was used to identify the degradation intermediates. Five new pefloxacin degradation products were found and possible degradation pathways were suggested.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Plasmonics
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2025
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IF 4.3
Chen Kun,Ma Chaoqun,Chen Guoqing,Yang Taiqun,Gao Hui,Li Lei,Hu Anqi,Cao Jun,Zheng Chenkai,Ma Longyao,Chen Zehao
The detection of pefloxacin (PEF) in milk is of significant importance for food safety. Traditional methods for detecting PEF often rely on techniques such as high-performance liquid chromatography (HPLC), which are complex and time-consuming. This article introduces a surface-enhanced Raman scattering (SERS) substrate based on a composite of covalent organic frameworks (COFs) and silver nanoparticles (AgNPs) for the rapid detection of PEF in milk. After testing PEF in both water and milk, the detection limits were calculated to be 6.31 μg/L for water and 82 μg/L for milk, with correlation coefficients of 0.991 and 0.998, respectively. Furthermore, the average recovery rate of PEF in milk ranged from 96.25% to 106.17%, with a relative standard deviation (RSD) of 4.32% to 8.88%. This work offers a simple and rapid method for detecting PEF in milk. Graphical
研究领域:
食品安全
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分析化学
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药物残留检测
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DOI
高影响因子
Micromachines
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2023
·Vol. 14
·期 5
·941
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IF 3.4
Qiuping Li,Nuan Wen,Wu Zhang,Liansheng Yu,Jinghui Shen,Shuxian Li,Yuguang Lv
g-C3N4and g-C3N4/TCNQ composites with different doping levels were prepared using the copolymerization thermal method with melamine as a precursor. XRD, FT-IR, SEM, TEM, DRS, PL, and I-T characterized them. The composites were successfully prepared in this study. The photocatalytic degradation of pefloxacin (PEF), enrofloxacin (ciprofloxacin), and ciprofloxacin (ciprofloxacin) under visible light (λ > 550 nm) showed that the composite material had the best degradation effect on PEF. When TCNQ doping is 20 mg and catalyst dosage is 50 mg, the catalytic effect is the best, and the degradation rate reaches 91.6%, k = 0.0111 min−1, which is four times that of g-C3N4. Repeated experiments found that the cyclic stability of the g-C3N4/TCNQ composite was good. The XRD images were almost unchanged after five reactions. The radical capture experiments revealed that ·O2−was the main active species in the g-C3N4/TCNQ catalytic system, and h+also played a role in PEF degradation. And the possible mechanism for PEF degradation was speculated.Keywords:TCNQ;graphite phase carbon nitride;pefloxacin;photocatalysis
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
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IF 5.999
Qiang Zhang,Shengbao Duan,Yinong Huang,Jingjing Tian,Jia Hu
By integrating the fluorescence of quantum dots (QDs) and Mn 2+ -pefloxacin mesylate (Mn 2+ -pefloxacin), a new type of dual-band fluorescence biosensor for high-efficiency and sensitive determination of double-stranded DNA (dsDNA) is developed. The biosensor is based on the fluorescence "OFF-ON" mode of both QDs and QDs-Mn 2+ -pefloxacin. The Mn 2+ -pefloxacin complex can quench the QDs fluorescence via photoinduced electron transfer (PET), and its fluorescence is also quenched. Due to the specificity and strong binding affinity of dsDNA for the Mn 2+ -pefloxacin complex, it can break the low fluorescent QDs-Mn 2+ -pefloxacin and restore the fluorescence of QDs and Mn 2+ -pefloxacin complex in their respective bands. Therefore, the dual-band fluorescence quantitative detection of dsDNA by QDs-Mn 2+ -pefloxacin can be achieved, while bovine serum albumin , single-stranded DNA, and bio-related ions do not yield similar results. Furthermore, the possible reaction mechanisms are systematically discussed. The detection limits (3δ/K) of herring sperm (hs) DNA in the fluorescence recovery bands of QDs and Mn 2+ -pefloxacin complex are 0.0142 and 0.0465 μg/mL, respectively. The developed biosensor was used for dsDNA detection in synthetic samples, and desirable results are obtained.
研究领域:
生物化学
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分子生物学
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分析化学
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PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2020
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IF 5.88
Wanling Cai,Xiulan Weng,Wei Zhang,Zuliang Chen
The increased efflux of fluoroquinolone antibiotics to the environment has become of worldwide concern due to their potential to disturb aquatic ecosystems. How to improve the antibiotic release is a challenge. In this work, magnetic Fe 3 O 4 nanoparticles as a drug release vehicle were prepared using the green synthesis method. It is a simple and environmental friendly technique that employs the plant extract as a reducing and coating agent during the preparation process. Antibiotics ofloxacin and pefloxacin served as the drug model and the drug release behavior was tested at various pH levels. The release efficiency of ofloxacin from Fe 3 O 4 reached 99.6% and for pefloxacin it was 57.0% at 310 K after 120 h (pH 10.5). The scanning electron microscope images show that Fe 3 O 4 particles ranged in size from 10 to 40 nm and magnetism testing indicated that saturation magnetization was 58.7 emu/g. Furthermore, zeta potential, FTIR, UV-VIS, XRD and XPS were used to provide the evidence to support the release mechanism, where was based on the pH control. Our work clearly demonstrated that Fe 3 O 4 nanoparticles were a potential as a targeted drug delivery system.
研究领域:
环境科学
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药剂学
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2024
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IF 4
Hui Li,Fujia Dong,Yu Lv,Zhaoyang Ma,Yue Chen,Sichun Chen,Jinhua Xian,Yingjie Feng,Sijia Liu,Jiarui Cui,Xiuwei Yan,Songlei Wang
Non-destructive detection of veterinary drug residues in meat products is critical for ensuring food safety and human health. The feasibility of using visible near-infrared (Vis-NIR) and near-infrared (NIR) hyperspectral imaging (HSI) system combined with data fusion for the prediction of pefloxacin residues in mutton was investigated in this study. A partial least squares regression optimization model was developed by multivariate data processing methods. The results showed that the low-level fusion (LLF) produced better results with R 2 P = 0.907 and RMSEP = 0.462 as compared to individual data blocks. Furthermore, intermediate-level fusion (ILF) based on iterative retention of informative variables algorithm showed the best results with R 2 P = 0.940 and RMSEP = 0.375. Finally, the visualized distributions of Vis-NIR and NIR based on the optimal model combination were mapped. The results have demonstrated that a combination of HSI with data fusion may be applied to rapidly and non-destructively detect pefloxacin residues in mutton.
研究领域:
食品科学
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光谱学
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生物医学工程
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2026
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IF 7.1
Cong Geng,Xue Yang,Shengnan Chen,Zhiwei Zhao,Yinyan Guan,Weichun Gao,Jiyan Liang,Chen Yuan,Xiaofeng Chen
In recent years, the pervasive presence of antibiotics in surface water and their potential ecological risks have garnered significant attention. The advanced oxidation system of a dual-wavelength UV (VUV/UVC) synergistic peroxymonosulfate (PMS) has been employed as a potential technology for removing organic pollutants from water. The VUV/UVC/PMS process entails the irradiation of PMS with VUV (185 nm) and UVC (254 nm) to concurrently generate hydroxyl radicals (·OH), sulfate radicals (SO 4 ·- ), and singlet oxygen ( 1 O 2 ). This process has markedly enhanced pefloxacin (PEF) and levofloxacin (LEV) degradation efficiency. The experimental findings suggest that the VUV/UVC/PMS system attains optimal degradation of PEF and LEV under conditions of low initial PEF and LEV concentrations, elevated initial PMS concentration, elevated reaction temperature, and an initial pH of 11. In this system, ·OH, SO 4 ·- , and 1 O 2 are the main active species responsible for the degradation of LEV, contributing 84.46%, 5.52%, and 7.98%, respectively. Through EEM spectra and high-resolution mass spectrometry analysis, the degradation pathways of PEF and LEV were inferred, and the synergistic mechanism between VUV and PMS was revealed. A comparison of the individual processes with the VUV/UVC/PMS system showed a significant reduction in energy consumption, with PEF degradation energy consumption decreasing by 7.58%-41.87% and LEV degradation energy consumption decreasing by 2.7%-76.34%. The study indicates that the VUV/UVC/PMS system possesses the advantages of high efficiency, low energy consumption, and simple operation, making it a green and sustainable process for treating antibiotic pollution in surface water.
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DOI
高影响因子
Journal of Water Process Engineering
·
2026
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IF 6.6
Suyu Xu,Liulu Liu,Fuwen Lei,Gexin Liu,Liang Xiao,Yafeng Zhang,Guangli Li
A sensitive voltammetric platform for determination of pefloxacin. • UiO-67/MWCNT-COOH exhibited significant synergistic effect toward pefloxacin. • Wide linear range (0.01–10 μM), low LOD (5.0 nM) and good stability (30 days). • High sensitivity in the detection of pefloxacin in lake water and honey. Developing a simple and efficient detection method for pefloxacin (PEF) is crucial for environmental monitoring and food safety assurance. In this study, we designed a novel electrochemical sensor for PEF detection by integrating zirconium-based metal-organic frameworks (UiO-67 MOFs) with carboxylated multi-walled carbon nanotubes (MWCNT-COOH) through a two-step hydrothermal and ultrasonic-assisted strategy. The coordination of the carboxyl groups of MWCNT-COOH with the unsaturated metal sites on the zirconium clusters of UiO-67, and the strong electrostatic attraction between PEF and the negatively charged composite surface, as well as strong π-π stacking interactions between the aromatic ring of PEF and the benzene rings of the organic ligands in UiO-67 and the graphite surface of MWCNT-COOH, collectively contribute to the efficient accumulation and sensitive detection of PEF. The sensor demonstrated a wide linear range (0.01–10 μM), an ultralow detection limit (0.005 μM), and outstanding overall sensing performance. When applied to real-world samples, including lake water and honey, the method achieved satisfactory recovery (94.48% − 108.9% and 100.9% to 106.4%, respectively), confirming its practical applicability for monitoring PEF in environmental and food matrices. A sensitive electrochemical sensing platform was developed for the detection of trace pefloxacin residues in lake water and honey by integrating zirconium-based metal-organic frameworks (UiO-67 MOFs) with carboxylated multi-walled carbon nanotubes (MWCNTs-COOH). Download: Download high-res image (126KB) Download: Download full-size image
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DOI
高影响因子
Water
·
2022
·Vol. 14
·期 23
·3857
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IF 3.53
Rong Shen,Yichang Yu,Qinfang Liu,Ruili Wang,Rong Lan,Hui Feng,Ran Yu,Lihua Jin,Ye Li
Pefloxacin (PFLX) is a type of fluoroquinolone (FQ) that has been widely used in aquaculture and animal husbandry. It is also a new kind of pseudo-persistent pollutant, which has some toxic effects. In this study, zebrafish (Danio rerio) embryos were used as exposure models to analyze the toxicity of PFLX. The results showed that PFLX was absorbed on the outer membrane surface at the beginning, and then a few PFLX slowly entered the cytoplasm. The adsorption complied with the Langmuir isotherm adsorption model. The surface morphology of the embryonic membrane was changed. PFLX exposure had no effect on fetal autonomous movement, but it significantly inhibited the embryo hatching rate. After PFLX exposure, the embryo and larval survival rates showed a clear dose–effect relationship. Though PFLX exposure did not cause teratogenic toxicity, it still affected cardiovascular function. The potential toxicity mechanism and developmental toxicity of PFLX to zebrafish were revealed. These results could be important for studies concerning FQ toxicology.Keywords:pefloxacin;zebrafish;embryonic membrane;developmental toxicity
研究领域:
毒理学
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环境科学
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Yaoyu Zhou,Jianlong Wang
Electro-Fenton (EF) can in-situ produce H 2 O 2 and effectively activate H 2 O 2 to generate powerful reactive species for the destruction of contaminants under acidic conditions, however, the production of iron-containing sludge and requirement of low working pH significantly hinder its practical application. Herein, a novel Cu, N co-doped carbon (Cu–N@C) with metal organic framework (MOF) as a precursor was constructed and adopted for the elimination of pefloxacin (PEF) in the heterogeneous electro-Fenton (HEF) process. PEF could be almost completely removed within 1 h and total organic carbon (TOC) removal efficiency was 48.57% within 6 h. Meanwhile, Cu–N@C had good repeatability and environmental adaptability, it can still maintain excellent catalytic performance after 10 cycles, and it exhibited satisfactory remediation performance in simulated water matrix. In addition, the HEF process catalyzed by Cu–N@C also showed satisfactory degradation effect on other organic pollutants including atrazine, methylene blue, and chlorotetracycline. Under the action of impressed current, the HEF system could generate H 2 O 2 in-situ, and the active species could be generated in the redox cycle of Cu 0 /Cu 1+ /Cu 2+ . Electron paramagnetic resonance and quenching experiments confirmed that •OH was the dominant active species in the degradation of organic compounds. The degradation process of PEF was studied by mass spectrometry analysis of intermediate products. This study provided a simple method to prepare MOF-based electrocatalyst , which exhibits promising application potential for treatment wastewater .
研究领域:
环境科学
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材料科学
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废水处理
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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）