JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Guanlong Yu,Xinyu Liao,Xinkui Wang,Jiani zhang,Anni Zheng,Yuxi Cheng,Songcheng He
A Bi 5 O 7 I/Bi 2 WO 6 nanocomposite with hierarchical spherical structure was successfully prepared by co-precipitation and hydrothermal methods. Notably, the composite (denoted as BB-50) exhibited optimal photocatalytic performance when the Bi 5 O 7 I:Bi 2 WO 6 weight ratio was 50%, with the degradation rate of oxytetracycline (OTC) reaching 98.3% within 90 min and the inhibition rate of Escherichia coli ( E. coli ) bacteria reaching 100% within the same time frame. Characterization experiments and theoretical calculations indicated that the formation of the heterojunction induced an internal electric field at the interface, consistent with the transfer mechanism of photogenerated carriers characteristic of type-I heterojunctions. In addition, the formation of the Bi 5 O 7 I/Bi 2 WO 6 heterojunction promoted the generation of reactive oxygen species (ROS), including ·OH, h + , and e − . The formation of the Bi 5 O 7 I/Bi 2 WO 6 composite not only enhanced the light-absorption capacity (with a red-shift to 433 nm), but also greatly strengthened the adsorption ability, as the specific surface area of BB-50 was higher than those of the Bi 5 O 7 I and Bi 2 WO 6 components, respectively. In particular, the specific surface area of BB-50 was found to be 10.2 and 18.7 times higher than those of Bi 5 O 7 I and Bi 2 WO 6 , respectively. This complex effect also improved the separation and transfer efficiency of photogenerated carriers, which significantly enhanced the photocatalytic activity. The present composite exhibited considerable potential for the efficient removal of OTC and E. coli , providing a feasible approach for reducing water environmental pollution.
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JOURNAL OF SOILS AND SEDIMENTS
·
2024
·Vol. 24
·期 4
·1639-1651
·
IF 2.8
Liu Zengyu,Chen Yuyun,Zhang Junqin,Wang Fei,Zhang Hongli,Yun Rongrong,Li Ling,Chilouch Chayma
Purpose The contamination of soil with antibiotics has become a hot issue for the environment and global public health. However, there are scarcely any studies on the occurrence forms of antibiotics in saline soil. Occurrence forms of antibiotics are related to bioavailability. Therefore, this study facilitates the evaluation of the ecological risk of antibiotics in saline soil. Materials and methods An experiment with artificial antibiotic contamination of soil and salinization simulations was conducted. The changes in the occurrence forms of oxytetracycline (OTC) and sulfamethoxazole (SMX) in saline soil were analyzed by continuous ultrasonic extraction. The factors for occurrence forms, including aging time and particle size fraction, were considered. Results and discussion Soil salinization promoted the conversion of OTC and SMX from acid-soluble and bound states to water-soluble and locked states. Oxytetracycline in saline soil was predominantly in the water-soluble and acid-soluble states, accounting for 54.9–83.7% of the total. Sulfamethoxazole as well is accounting for 66.1–82.1%. In addition, the aging process from 7 to 63 days facilitated the conversion of OTC and SMX from the water-soluble, acid-soluble, and bound states to the non-extractable locked states, resulting in reduced bioavailability. Since the content of extractable forms of OTC and SMX in saline clay was high, it favors conversion to a locked state. Conclusions Oxytetracycline and sulfamethoxazole in saline soil were mainly in bioavailable states. The aging effect reduced the bioavailability of OTC and SMX in saline soil. Clay had the low proportion of OTC and SMX in the bioavailable state, reducing environmental risks.
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LANGMUIR
·
2026
·
IF 4.4
Yuru Yang,Xiaoxia Li,Qian Xiao,Shuang Zhou,Qingmiao Pu,Bingyu Luo,Xiaodong Su
To prevent the proliferation of the OTC resistance genes in wastewater and their spread in the environment, advanced treatment of the OTC-containing wastewater has become necessary. In this study, an adsorbent material consisting of CDs/o-MWCNTs was synthesized using a combination of DBD technology and a hydrothermal method. The material was characterized by TEM, SEM, FT-IR, XRD, XPS, BET, TGA, and surface ζ-potential analysis. The effects of the adsorbent dosage, adsorption temperature, solution pH, adsorption time, and ionic interference on the adsorption of the OTC by CDs/o-MWCNTs were investigated. The results showed that the material contains 73.42% C, 6.39% O, and 5.78% N, with abundant active sites, a specific surface area of 148.48 m2/g, and a maximum adsorption capacity of 12.619 mg/g. The adsorption process followed the pseudo-second-order kinetic model and the Freundlich isotherm model. A series of analyses indicated that the adsorption and removal of OTC from water by CDs/o-MWCNTs occur through the synergistic effects of hydrogen bonding, π–π interactions, and van der Waals forces. After 10 adsorption–desorption cycles, the adsorption efficiency of CDs/o-MWCNTs remained above 91%. Moreover, for aquaculture wastewater with the OTC concentration below 0.1 mg/L, the material achieved a removal efficiency close to 100%. It also exhibited good salt tolerance and is suitable for the advanced treatment of OTC in high-salinity (1.0 mol/L NaCl) wastewater.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Li Wang,Anhui Lin,Mengyun Wang,Wenhao Lin,Yan Jiang,Maojun Jin,Huanhuan Li,Bingyuan Su,Xiaomei Chen
Synchronous detection method for chloramphenicol and oxytetracycline. • Integrating electromagnetically driven fluorescence visual sensing platform with a smartphone. • Signal separation of dual-emission AuNCs by different magnetic response of MNPs. In this work, a synchronous detection method for chloramphenicol (CAP) and oxytetracycline (OTC) was developed by integrating electromagnetically driven fluorescence visual sensing platform with a smartphone. Typically, red-AuNCs and green-AuNCs were used as fluorescence signal probes to respectively bind CAP and OTC aptamers, and strong- and weak- magnetic nanoparticles (S-MNPs and W-MNPs) combining with the corresponding complementary chain were functioned as capture probes. Based on the characteristics of dual-emission AuNCs, synchronous and sensitive detection of CAP and OTC can be achieved by fluorescence. Further, due to the different magnetic response of MNPs, red-AuNCs and green-AuNCs were separated in the electromagnetically driven zonal chip platform, fluorescent visual detection of CAP and OTC was achieved by coupling with a smartphone. The fluorescence detection limits of the constructed method for CAP and OTC were 0.008 μmol/L and 0.005 μmol/L respectively, and the fluorescence visualization detection limits were 0.075 μmol/L and 0.037 μmol/L. Download: Download high-res image (192KB) Download: Download full-size image
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Analytical Methods
·
2023
·Vol. 15
·期 12
·1569-1575
·
IF 3.1
Qianji Li,Xiwen Wu,Xiaohuan Zhang,Wenen Su,Yan Tan,Pengfei Fan,Jinquan Liu,Shengyuan Yang
Eco-friendly biomass carbon dots (CDs) with blue fluorescence emission were rapidly synthesized by a microwave method. Based on the inner filter effect (IFE) between oxytetracycline (OTC) and CDs, the fluorescence of CDs could be selectively quenched by OTC. Therefore, a simple and time-saving fluorescence sensing system for the detection of OTC was established. Under optimal experimental conditions, the concentration of OTC showed a good linear relationship with fluorescence quenching values (ΔF) in the range of 4.0–100.0 μmol L−1, a corresponding correlation coefficient (r) of 0.9975, and a detection limit of 0.12 μmol L−1. The method has the advantages of low cost, time-saving, and green synthesis that could be used for the determination of OTC. Moreover, possessing high sensitivity and specificity, this fluorescence sensing method was successfully applied for detecting OTC in milk, indicating its potential applications in food safety.
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Jing Lou,Jiutao An,Xiangyou Wang,Xiaonan Yang,Guanglu Lu,Liang Wang,Zitong Zhao
A systematic investigation of coupling dielectric barrier discharge (DBD) plasma and different ultraviolet bands (UVA, UVB, UVC, and VUV) was constructed for antibiotic-contaminant wastewater treatment . Compared with DBD, UV, or other combined DBD/UV systems, the DBD/VUV/UVC system exhibited excellent degradation and mineralization efficiencies for oxytetracycline (OTC), achieving 93.2% removal rate (reaction rate constant 1.05 min −1 ) and higher decarbonization efficiency (mineralization rate 0.47 mg C min −1 ) within 2.5 min treatment. The radical quenching tests revealed that HO⋅, O 2 · - , and 1 O 2 were all involved in the decomposition of OTC in the DBD/VUV/UVC system, among which O 2 · - played a dominant role. Possible degradation pathways of OTC in the DBD/VUV/UVC process were proposed using density functional theory and detected intermediates. Four indexes were used to assess the toxicity of OTC and its degraded intermediates. The inorganic anions and HA slightly reduced the degradation efficiency of the DBD/VUV/UVC system. This research provides new ideas to broaden the application of plasma and alleviate the water environment crisis.
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ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Ziyue Yu,Changzhou Yan,Donghua Qiu,Xin Zhang,Ce Wen,Sijun Dong
Microplastics have been widely reported as carriers of antibiotics, yet studies investigating the combined ecotoxicology of microplastics and antibiotics on organisms is limited. In this study, different sized polystyrene plastics and oxytetracycline (OTC) were used to carry out a 30-day single and binary-combined exposure experiment of zebrafish, and the microplastics and OTC accumulation, liver histological alteration, biomarkers and transcriptomic response of zebrafish were evaluated. Our results indicated that 300 nm and 50 nm plastic particles increased the OTC accumulation in liver by 33.8% and 44.5%, respectively. Microplastics and OTC induced severe liver histological damage, and the damage is size-dependent, increasing with the decrease of microplastics sizes. The liver biomarkers indicated a different response pattern in single microplastics exposure and combined with OTC, single or co-exposure of 50 nm nano-plastics and OTC induced intense responses of integrated biomarker response values. The 50 nm nano-plastics, OTC and their combined exposure induced 1330, 2693 and 3965 significantly differentially expressed genes, respectively, in which the steroid biosynthesis pathway was significantly affected by all the three treatments. This study elucidated the size-dependent effects of microplastics and provided detailed data from histopathology to transcriptome profile, enhancing our understanding of the ecotoxicity of microplastics and OTC.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xueying Cheng,Renquan Guan,Yunning Chen,Yudan Qian,Qingkun Shang,Yingnan Sun
In this study, the adsorption and photocatalytic degradation of oxytetracycline (OTC) were systematically investigated using different metal-doped anatase-phase mesoporous TiO 2 nanocatalysts (M−TiO 2 , M = Fe, Co, Ni, Cr). The results showed that doping with different metals had a significant effect on the ability of TiO 2 to adsorb and degrade OTC . Comparing the photoelectric properties of four photocatalysts (Fe-TiO 2 , Co-TiO 2 , Ni-TiO 2 and Cr-TiO 2 ), it was observed that the mutual synergy between the separation ability of the photogenerated carriers and the adsorption ability of pollutants was the fundamental reason for the excellent photocatalytic performance of Fe-TiO 2 . The relative intensities of the high-resolution mass spectrometry (HRMS) peaks were used to track and analyse the degradation products of pollutants at different adsorption or light-irradiation times during the photocatalytic process. The ability of the pollutants to undergo dark-state adsorption significantly influenced their degradation paths and products. The possible mechanism of the photocatalytic decomposition of pollutants using Fe-TiO 2 along different paths was proposed according to the Fukui function calculation and MS results. To the best of our knowledge, this is the first time that quantitative HRMS results have been used to assess the degradation pathways of pollutants.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 35
·84002-84010
·
IF 5.8
Yang Zhenhua,Yang Xintong,Zhang Yuexia,Fan Xiaopeng,Cao Yujuan,Li Zhongping,Dong Chuan
Amphiphilic blue-fluorescence carbon dots (B-CDs) were synthesized via pyrolysis method with citric acid and oleamine as precursors. B-CDs are monodispersed in ethanol, toluene, and ultrapure water with the average particle sizes of 3.33 nm, 2.05 nm, and 4.12 nm, respectively. The maximum emission wavelength of the B-CDs excitation at 370 nm is located at 459 nm. The B-CDs have good optical properties with excellent photostability. The fluorescence quantum yield (QY) of the as-prepared CDs is as high as 30.17%. The fluorescence of B-CDs is quenched because of static quenching by oxytetracycline. A high selective and sensitive fluorescence probe for detecting oxytetracycline was constructed with a linear range of 1.52–27.60 µg/mL and the detection limit of 0.33 µg/mL. The B-CDs-based fluorescence probe can be applied to analyze oxytetracycline in milk; the recoveries and relative standard are satisfactory. Furthermore, the B-CDs were exploited for imaging of SH-SY5Y cells. The results demonstrate that as-synthesized CDs can serve as a cellular imaging reagent owing to remarkable bioimaging performance. This work provides a new strategy for the detection of oxytetracycline in food.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 53
·80399-80410
·
IF 5.19
Shu Xinpeng,Bi Huaqi,Wang Jun,Yang Jiaxin,Wang Jue,Liu Guangqing,Su Bensheng
Catalytic ozonation with supported metal oxides is a promising strategy for addressing refractory pollutants in wastewater. In this study, γ-Al 2 O 3 supported MnO x -CeO x catalysts (MC 1 , MC 2 , and MC 3 ) obtained at different calcination temperatures (400 °C, 550 °C, and 700 °C) were applied as effective catalysts for ozonation and explored the feasibility of the treatment of oxytetracycline (OTC) wastewater. Comparatively, the MC 2 possessed the highest molar ratios of Mn 3+ /Mn 4+ (1.60) and Ce 3+ /Ce 4+ (0.96), the largest surface area (273.8 m 2 g −1 ) with a petal-shaped structure, and most abundant surface hydroxyls (3.78 mmol g −1 ). These physicochemical characteristics benefited the surface reaction and resulted in the acceleration of ozone decomposition, electron transfer, and •OH generation, thereby improving the catalyst’s adsorption ability and catalytic activity. The combination with MC 2 increased the OTC and COD removal of the ozonation process from 59.1% and 29.0% to 94.7% and 83.3% in 25 min, respectively. By employing electron paramagnetic resonance (EPR) and radical quenching experiments, it was verified that •OH species generation promoted the mineralization of OTC. The possible degradation pathways of OTC were investigated through mass spectrometry, and the route consisted of dehydration, deamination, and demethylation. Moreover, during a 12-day continuous experiment, MC 2 catalyst exhibited excellent reusability and catalytic stability, with COD removal efficiencies above 80%.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Huafang Zhang,Qinghong Pan,Wanying Cai,Xiaowei Shi,Da-Peng Yang,Hetong Lin,Enhui Qiu
Antibiotic monitoring remains vital to ensure human health and safety in the environment and foods. As the most popular detection method, photoelectrochemical (PEC) sensor can achieve rapid and accurate detection of antibiotics with the advantages of high sensitivity, easy-to-preparation process, as well as high selectivity. Herein, an extremely-efficient visible-light responsible ZnO/C nanocomposite was prepared and combined with acetylene black (as an enhanced conductive matrix), and the electron migration efficiency was greatly accelerated. Meanwhile, a molecularly imprinted polymer obtained by electrical agglomeration was conjugated as a specific recognizing site for target. Furthermore, the as-prepared rMIP-PEC sensor showed a low detection limit (8.75 pmol L −1 , S/N = 3) in a wide linear detection range of 0.01–1000 nmol L −1 for oxytetracycline (OTC), with excellent selectivity and long-term stability. Our work shed light on applying C-doped ZnO semiconductor and molecularly imprinted polymer as photoelectric active sensing materials for rapid and accurate analysis of antibiotics in foods and environment.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 46
·21505-21512
·
IF 3.3
Yuhao Lu,Tao Wang,Chengshun Tang,Qijian Niu,Tianyan You
Oxytetracycline (OTC) residues in the environment seriously endanger ecosystems and human health. Hence, it is critical to develop a selective and sensitive sensor for trace OTC detection. In this work, a facile and highly selective colorimetric aptasensor was constructed for OTC detection by the surface electrostatic assembly between aptamers and Fe-MOFs. Due to the steric effects and the decrease in the electron transfer rate, the peroxidase-like activity of NH2-MIL-88B was significantly inhibited after the adsorption of aptamers. Furthermore, the selective binding between aptamers and OTC triggered the release of aptamers from the surface of NH2-MIL-88B, which led to the reactivation of peroxidase-like activity. The colorimetric aptasensor exhibited a satisfactory detection range (1.0 × 10−10 M to 3.0 × 10−7 M) and the limit of detection (LOD) was as low as 1.9 × 10−11 M. Additionally, the colorimetric aptasensor was successfully used to detect OTC in real samples. The developed colorimetric aptasensor provided an important reference value for the sensitive detection of other antibiotics in the environment.
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