Nanomaterials
·
2025
·Vol. 15
·期 11
·833
·
IF 4.3
Song Cui,Yaocong Liu,Xiaolong Dong,Xiaohu Fan
The widespread contamination of aquatic environments by tetracycline antibiotics (TCs) poses a substantial threat to public health and ecosystem stability. Although photo-Fenton processes have demonstrated remarkable efficacy in degrading TCs, their practical application is limited by challenges associated with catalyst recyclability. This study reports the development of a novel magnetic recoverable SrFe12O19/g-C3N4heterostructure photocatalyst synthesized via a facile one-step co-calcination method using industrial-grade precursors. Comprehensive characterization revealed that nitrogen defects and the formation of heterojunction structures significantly suppress electron (e−)–hole (h+) pair recombination, thereby markedly enhancing catalytic activity. The optimized 7-SFO/CN composite removes over 90% of oxytetracycline (OTC) within 60 min, achieving degradation rate constants of 0.0393 min−1, which are 9.1 times higher than those of SrFe12O19(0.0043 min−1) and 4.2 times higher than those of g-C3N4(0.0094 min−1). The effectively separated e−play three critical roles: (i) directly activating H2O2to generate ·OH radicals, (ii) promoting the redox cycling of Fe2+/Fe3+ions, and (iii) reducing dissolved oxygen to form ·O2−species. Concurrently, h+directly oxidize OTC molecules through surface-mediated reactions. Furthermore, the 7-SFO/CN composite exhibits exceptional operational stability and applicability, offering a transformative approach for scalable photocatalytic water treatment systems. This work provides an effective strategy for designing efficient and recoverable photocatalysts for environmental remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Engineering Journal Advances
·
2020
·
IF 0
Hanlu Yan,Minghan Luo,Qiuwen Chen,Taeseop Jeong,Jianyun Zhang,Li Wang
Eliminating tetracycline antibiotics from waste streams by conventional water treatment techniques remains challenging. Vacuum-ultraviolet/ultraviolet (VUV/UV)-based advanced oxidation technique is a promising, environment-friendly alternative to remove micropollutants from wastewater without adding chemicals. This study carried out flow-through experiments and numerical modeling to determine the efficiency and mechanism of VUV/UV process in degrading oxytetracycline (OTC) via a newly developed photoreactor with tangential inlet and outlet. OTC degradation pathway and reaction rate constant were identified through semi-batch experiments at various initial OTC concentrations in different water matrices. The decomposition of OTC by the VUV/UV process was as effective as that by the H 2 O 2 /UV approach but generated less byproducts and thus could be beneficial for process control. Removal of organic matter and inorganic ions were suggested before VUV/UV process to improve the treatment efficiency. Flow characteristics simulated by computational fluid dynamics (CFD) revealed that a special bidirectional spiral flow was formed in the new reactor, which improved the mixing efficiency of fluids and thus enhanced the contact between hydroxyl radicals and the contaminant. The distribution profiles of OTC and hydroxyl radicals confirmed that the target contaminant was decomposed following the flow direction, and the degradation efficiency could be further increased by decreasing the internal diameter of the photoreactor. The electrical energy-per-order analysis of the photoreactor proved the high-energy utilization efficiency and cost-effectiveness of the VUV/UV process.
✓ 已验证
DOI
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Ziyue Yu,Ling Zhang,Qiansheng Huang,Sijun Dong,Xinhong Wang,Changzhou Yan
Accumulated evidence has demonstrated that microplastics and oxytetracycline (OTC) affect organisms, but few studies have investigated their combined effects on aquatic organisms. In this study, adult zebrafish ( Danio rerio ) were exposed to single and binary-combined contamination of micro-, nano-sized polystyrene plastics and OTC for 30 days, and the intestinal histopathology, gut microbiota and antibiotic resistance genes (ARGs) of zebrafish were measured. The results showed that the intestinal epithelial damage increase with the decrease of plastic sizes. Nano-sized plastics, OTC and their combined exposure caused intestinal epithelial damage, and co-exposure with micro-sized plastics reduced the intestinal damage caused by single OTC exposure. The gut microbial communities were affected by the combined exposure to microplastics and OTC. Compared with the blank control, the relative abundance of Fusobacteria increased 12.7 % and 21.1 % in OTC combined with 45–85 μm micro-plastics (MOTC) and 40–54 nm nano-plastics (NOTC), respectively, and that of Bacteroidetes increased 26.2 % and 18.6 % in the MOTC and NOTC treatments, respectively. The effects of MOTC and NOTC on the biodiversity of the zebrafish gut microbiome were different; MOTC increased the biodiversity by 11.3 % compared with the blank control, whereas NOTC decreased the biodiversity by 8.8 % compared with the blank control. Furthermore, the abundance of ARGs in 40–54 nm nano-plastics, MOTC and NOTC treatments was increased 96.9 %, 96.6 % and 68.8 % compared with the control group, respectively. Additionally, significant differences were observed in ARGs characteristics between the micro- and nano-plastics treated groups whether combined with OTC or not. These results are essential to further understand the combined ecotoxicological effects of micro- or nano-plastics and antibiotics on aquatic organisms.
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 10
·9342-9350
·
IF 2.8
Hu Zhetai,Sun Peide,Han Jingyi,Wang Ruyi,Jiao Liang,Yang Pengfei,Cai Jing
Since extensive application, an increasing amount of antibiotics has been released into wastewater treatment plants. In this study, the enhanced biological phosphorus removal (EBPR) system was fed with synthetic wastewater containing erythromycin (ERY) and oxytetracycline (OTC) for 7 days to evaluate the variations of solution ortho-P (SOP), volatile fatty acid (VFA), poly-bhydroxyalkanoates (PHAs), specific oxygen uptake rater (SOUR), and microbial community in the EBPR system. The obtained results showed that the P-removal efficiency decreased to 0.0%, and at the end of the experiment, only less than 20% of the VFA could be consumed. Besides, the variable processes of P and PHAs were destroyed. Moreover, to better grasp the inhibitory mechanism of antibiotics, microbial community compositions of activated sludge sampled in all reactors were investigated by high-throughput sequencing techniques. Results of comparative and evolutionary analysis revealed that high concentrations (5 and 10 mg/L) of ERY and OTC could seriously shift microbial communities, while combined antibiotics could induce more. Additionally, Accumulibacter and Competibacter were two primary microorganisms at the genus level in the EBPR system. Accumulibacter decreased seriously for exposure to antibiotics, while Competibacter increased in all experimental reactors especially in combined antibiotics reactor.
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 4
·2127-2136
·
IF 3.108
Mengwei Li,Zhendong Zhao,Xiaodan Wu,Wenjun Zhou,Lizhong Zhu
In recent years, biochar has been well-documented in the literature as a promising soil amendment for the sorption and immobilization of organic contaminants in contaminated soils via its organic functional groups. In this study, original and demineralized cow manure biochars were applied with the aim to evaluate the impact of their mineral component on adsorption and competitive adsorption of oxytetracycline and carbaryl. Adsorption increased greatly for oxytetracycline but decreased slightly for carbaryl after demineralization. Mineral components significantly enhanced overall adsorption of carbaryl but slightly inhibited that of oxytetracycline to biochars, because the dominant sorption mechanisms of oxytetracycline and carbaryl on demineralized biochars were established as pore-filling effects and specific-site sorption, respectively. Competitive adsorption was observed in the binary-solute sorption system, where oxytetracycline outcompeted carbaryl on original biochars, however, carbaryl showed a greater competitive adsorption to oxytetracycline on demineralized biochars. Furthermore, demineralization treatment weakened the competition strength of oxytetracycline to carbaryl but enhanced that of carbaryl to oxytetracycline. This work demonstrated that the demineralization treatment altered the physicochemical properties of biochars and the dominant sorption mechanisms of oxytetracycline and carbaryl, leading to their different changes on competition strength. The results are useful for the application of biochars in the remediation of combined pollution in agricultural soils.
✓ 已验证
DOI
高影响因子
Magnetochemistry
·
2025
·Vol. 11
·期 6
·49
·
IF 2.5
Yujie Zhou,Yuzhe Fu,Xiaoxue Niu,Bohan Wu,Xinghan Liu,Fu Hao,Zichuan Ma,Hao Cai,Yuheng Liu
Antibiotic resistance has been recognized as a global threat to human health. Therefore, it is urgent to develop effective strategies to address the contamination of water environments caused by antibiotics. In this study, Fe/Mn bimetallic-modified biochar (FMBC) was synthesized through a one-pot oxidation/reduction-hydrothermal co-precipitation method, demonstrating an exceptional photocatalytic-Fenton degradation performance for oxytetracycline (OTC). Characterization techniques including FTIR, SEM, XRD, VSM, and N2adsorption–desorption analysis confirmed that the Fe/Mn bimetals were successfully loaded onto the surface of biochar in the form of Fe3O4and MnFe2O4mixed crystals and exhibited favorable paramagnetic properties that facilitate magnetic recovery. A key innovation is the utilization of biochar’s inherent phenol/quinone structures as reactive sites and electron transfer mediators, which synergistically interact with the loaded bimetallic oxides to significantly enhance the generation of highly reactive ·OH radicals, thereby boosting catalytic activity. Even after five recycling cycles, the material exhibited minimal changes in degradation efficiency and bimetallic crystal structure, indicating its notable stability and reusability. The photocatalytic degradation experiment conducted in a Fenton-like reaction system demonstrates that, under the conditions of pH 4.0, a H2O2concentration of 5.16 mmol/L, a catalyst dosage of 0.20 g/L, and an OTC concentration of 100 mg/L, the optimal degradation efficiency of 98.3% can be achieved. Additionally, the pseudo-first-order kinetic rate constant was determined to be 4.88 min−1. Furthermore, this study elucidated the detailed degradation mechanisms, pathways, and the influence of various ions, providing valuable theoretical insights and technical support for the degradation of antibiotics in real wastewater.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Fujun Ren,Tong Wang,Haitao Liu,Desheng Liu,Rui Zhong,Changyu You,Weijun Zhang,Suyun Lv,Shanshan Liu,Hao Zhu,Lu Chang,Bo Wang
We proposed a new peroxymonosulfate (PMS) activator that the dispersed CoMn 2 O 4 nanoparticles embedded in nitrogen-doped reduced graphene oxide aerogel (CoMn 2 O 4 @N-rGA) with interlinked three-dimensional network via hydrothermal method for oxytetracycline (OTC) degradation. CoMn 2 O 4 @N-rGA and PMS (CoMn 2 O 4 @N-rGA/PMS) exhibited a high degradation rate of 91.3% within 20 min and a rapid catalytic degradation rate of 0.0729 min −1 . The radical pathway system had excellent effects on OTC degradation in a wide range of pH from 3.0 to 9.0 and an outstanding catalytic activity on actual pharmaceutical wastewater. It was attributed to dispersed CoMn 2 O 4 nanoparticles embed in nitrogen-doped reduced graphene oxide aerogel with interlinked three-dimensional network by Scanning electron microscope (SEM). The mechanism was hypothesized that PMS was activated to generate sulfate radical (SO 4 - ) and hydroxyl radicals ( OH), which could be confirmed via free radical quenching test and electron paramagnetic resonance (EPR) spectra. Finally, a flow-type setup based on the feedback mechanism with excellent effect on high concentration of OTC and actual pharmaceutical wastewater was designed for verifying the practical value of the system.
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Xinglin Li,Pengfei Zhu,Maojie Zhang,Yunhui Jiang,Minxiu Zhao
Antibiotic residues in aquatic environments pose a persistent threat to ecosystems and human health, necessitating efficient remediation strategies. This study presents a supramolecular-engineered type-II heterojunction that integrates β-cyclodextrin (β-CD) surface functionalization with a coral-like BiOIO3/β-Bi2O3 heterostructure for enhanced visible-light photocatalytic degradation of oxytetracycline hydrochloride (OTC). β-CD functionalization simultaneously extends visible-light harvesting through supramolecular sensitization and concentrates OTC molecules at the catalyst surface via host–guest inclusion complexation, which collectively accelerates interfacial charge-transfer kinetics. Concurrently, the staggered type-II band alignment between BiOIO3 and β-Bi2O3 promotes efficient spatial separation of photogenerated carriers, suppressing recombination. The optimized composite (2.5β-CD/BiOIO3/30β-Bi2O3) achieves 87.34% OTC degradation within 60 min, exhibiting a pseudo-first-order rate constant 2.87-fold that of pristine BiOIO3. Comprehensive characterizations confirm the heterojunction architecture and reactive oxygen species evolution. The catalyst exhibits satisfactory photostability after being used 4 times. Degradation pathways are elucidated via high-performance liquid chromatography-mass spectrometry (HPLC-MS), while density functional theory (DFT) calculations of electrostatic potential, Highest Occupied Molecular Orbital (HOMO), and Lowest Unoccupied Molecular Orbital (LUMO) distributions identify the preferential reactive sites of OTC, providing molecular-level mechanistic insight. This work decouples the synergistic contributions of surface supramolecular engineering and heterojunction band engineering, offering a design strategy for photocatalytic remediation of refractory pharmaceutical pollutants.
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2026
·
IF 6.7
Huijun Li,Tianyi Zheng,Xiang Liu,Luojia Cheng,Junjun Sun,Zhouqing Xu,Yan Wang
A multifunctional composite, designated as ZIF-8@LY/ZIF-8@CDs-Eu 3+ , was rationally designed as a fluorescence probe and high-performance photocatalyst for simultaneous detection and degradation of oxytetracycline (OTC). To address the critical challenge of co-encapsulating fluorescein (LY) and Eu 3+ -functionalized carbon dots (CDs-Eu 3+ ) within a single porous particle without functional incompatibility, we proposed a core-shell ZIF-8 architecture, where the etched ZIF-8 core served as the host for LY loading, and the in situ grown ZIF-8 shell was introduced to immobilize CDs-Eu 3+ . The acetic acid etching of the ZIF-8 core created abundant sites to absorb more LY molecules, which further enhanced the OTC removal efficiency. On this basis, a fluorescence “turn-on” ratiometric quantitative detection platform for OTC was established, with a low limit of detection (LOD) of 1.8 nM. Meanwhile, the ZIF-8@LY/ZIF-8@CDs-Eu 3+ composite achieved 99% OTC removal within 300 min under light irradiation, driven by the generated reactive species including superoxide radicals (·O 2 − ), hydroxyl radicals (·OH), and photogenerated holes (h + ). Notably, three parallel degradation pathways of OTC were identified via high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS). This work not only provides an innovative strategy for the design of multifunctional MOF-based composites, but also opens a new avenue for the efficient monitoring and elimination of antibiotic residues in complex environmental matrices.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Qing Cao,Cheng Zhang,Shi Gao,Linkun Xie,Guanben Du,Xijuan Chai
A high-performance B/N codoped biochar (NB3GC) was synthesized using byproduct molasses via a combined hydrothermal treatment and pyrolysis process. A systematic investigation was carried out on the efficiency and underlying mechanism of NB3GC-activated peroxydisulfate (PDS) in degrading oxytetracycline hydrochloride (OTC). The results suggest that B/N codoping improved the pore structure and catalytic activity of the biochar material. The NB3GC catalyst exhibited exceptional performance in PDS activation for OTC removal. With NB3GC (0.4 g/L) and PDS (0.4 mM), the NB3GC/PDS system achieved a 99.1% OTC removal efficiency within 10 min, with a total organic carbon mineralization rate of 31.5%. The system maintained robust catalytic capability over the pH range (2–10) and in common interfering ions such as Cl– and HCO3–. Mechanistic studies identified O2•– as the primary reactive species, with •OH and SO4•– playing synergistic roles. Density functional theory calculations combined with liquid chromatography–mass spectrometry (LC–MS) analysis revealed that OTC underwent stepwise degradation via decarboxylation, ring-opening, and hydroxylation, ultimately forming low-molecular-weight products. This study offers a useable strategy for the valorization of waste molasses and an efficient nonmetal-based catalytic scheme , for environmental remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Kunlin Chen,Lin Zhou,Jingyi Gu,Xiaolin Huang,Yaqi Zeng,Qingqi Wen,Jiale Yue,Chengshuai Liu,Weilin Huang,Qiaoyun Zeng,Chengyu Chen
Nanosized activated carbons (NACs) have emerged as promising adsorbents for antibiotic removal due to their excellent colloidal stability and low ecotoxicity. This study investigated four biomass-derived NACs for adsorption of oxytetracycline (OTC) and sulfamethoxazole (SMX). Both kinetic and isotherm analysis revealed higher affinity for OTC ( q max = 113.10–196.00 mg/g) than SMX ( q max = 60.66–124.90 mg/g), with adsorption capacity ranking NAC2 > NAC1 > NAC3 > NAC4. Adsorption was favored under mildly acidic conditions (pH 3–4) and at lower temperatures (20 ℃). Increased concentrations of NaCl and CaCl 2 enhanced antibiotic uptake through salting-out and complexation effects, respectively. Humic and fulvic acids significantly inhibited OTC adsorption due to steric hindrance but had minimal impact on SMX. Pore filling, hydrogen bonding, and π–π electron donor-acceptor interactions all contributed to adsorption. Density functional theory (DFT) calculations revealed that OTC had a lower HOMO-LUMO (highest occupied and lowest unoccupied molecular orbitals) energy gap (1.273 eV) and more negative binding energies (-63.5 to −182.2 kJ/mol) than SMX (2.013 eV; −47.1 to −158.2 kJ/mol), confirming its stronger chemical reactivity and affinity for NAC surfaces. The findings provide a comprehensive understanding of NAC-antibiotic interactions and demonstrate the potential of NACs for effective antibiotic remediation in aquatic environments.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shiyu Bian,Wenting Sun,Yuwei Pan,Ming Zhang,Guangyu Wu,Yudong Huang
The large-scale production and disposal of polyethylene terephthalate (PET) and antibiotics pose significant environmental challenges. Thus, the high-value utilization of PET to degrade antibiotics is of great significance. Zn-MOF-X catalysts were fabricated via a two-step hydrothermal approach, with waste PET plastic flakes and zinc metal salt serving as the initial materials. Notably, Zn-MOF-2.5 exhibited remarkable effectiveness for peroxymonosulfate (PMS) activation to degrade oxytetracycline (OTC), reaching a removal rate of 93.01 % within 90 min under visible light. This catalyst demonstrated stable pH adaptability, strong resistance to interference and excellent stability across diverse and complex aqueous environments, retaining a 70 % OTC removal efficiency after eight cycles. To investigate the OTC degradation process via HPLC-MS and toxicological studies, the toxicity profiles of resulting intermediates were evaluated. This study investigated the properties of OTC using density functional theory calculations, assessed the application potential of the Zn-MOF-2.5/PMS system with economic analysis, and ultimately proposed a novel method for preparing efficient environmental pollutant removal catalysts from waste PET.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）