JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Xun Han,Junkai Pei,Yan Wang,Yongyan Sun,Fei Zheng
Due to excellent antibacterial properties, silver nanoparticles (AgNPs) have been widely used as a potential alternative to antibiotics in livestock farming, agricultural disinfection, and medical materials. Consequently, excess AgNPs are released into the soil, co-occurring with other antibiotics, and forming a combined contamination. However, effects of combined contamination with AgNPs and oxytetracycline (OTC) on microbial communities across different trophic levels within the soil micro-food web remain poorly understood. In this study, we systematically compared the differential responses of soil and nematode gut microbiomes using high-throughput sequencing under single and combined contamination (Control, AgNPs, OTC, and combined AgNPs+OTC). The results revealed systematic trophic-level differentiation between soil and nematode gut bacterial community in terms of diversity, community structure, assembly mechanisms, and functional phenotypes. Both communities were dominated by stochastic processes, but nematode gut bacterial community was more strongly influenced by deterministic processes and exhibited higher stability. Pollutant exposure induced pronounced trophic decoupling: soil bacterial community remained structurally stable, whereas nematode gut community underwent significant compositional reassembly ( p = 0.031) without a change in alpha diversity, indicating a species replacement pattern. AgNPs treatment enriched Escherichia-Shigella , while OTC and co-contamination enriched the potential degrader genera Pontibacter , Sphingomonas , and Sphingobium . Cross-kingdom network analysis showed that co-contamination strengthened network modularity (clustering coefficient 0.84, modularity 53), highlighting the role of shared ASVs as cross-kingdom bridges. This study introduces the concept of pollution-induced trophic decoupling, demonstrating that the impact of co-contamination on adjacent trophic levels is not a simple transmission of effects but rather a systematic decoupling of structure, function, and assembly mechanisms, thereby providing new perspectives for multi-trophic ecological risk assessment of combined pollution.
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BIORESOURCE TECHNOLOGY
·
2023
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IF 11.4
Qiaozhi Zhang,Yuqing Sun,Weijian Xu,Yang Cao,Chunfei Wu,Chi-Hwa Wang,Daniel C.W. Tsang
Microwave (MW)-assisted catalytic degradation of organic pollutants draws increasing attention owing to its high efficiency in wastewater treatment. This work developed Cu-loaded biochar (CuBC) catalysts for time-efficient mineralization of refractory and high-concentration oxytetracycline (OTC). With only 1 min at 80 °C, Na 2 S 2 O 8 achieved 100% total organic carbon (TOC) removal over the Cu5BC, while NaClO mineralized 73.3% TOC over the metal-free BC, in contrast to a relatively low mineralization efficiency (< 35%) achieved by H 2 O 2 . The high efficiency in MW-assisted oxidation systems could be ascribed to reactive oxidizing species ( • SO 4 − or • ClO), which otherwise were barely detectable in a conventional heating system. The interactions between CuBC and MW were revealed by correlating the physiochemical characteristics to the MW absorption ability. The proposed catalytic systems can contribute to the development of a high-throughput and low-carbon wastewater treatment technology.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yiqing Liu,Lin Tian,Zhenran Wang,Yongsheng Fu,Dandan Zhao
Citric acid (CA) can effectively complex with Fe(Ⅲ) to improve the solubility of Fe(Ⅲ) and accelerate the reduction of Fe(Ⅲ) to Fe(II), while its use in Fe(Ⅲ)-activated peracetic acid (PAA) system has not been reported so far. Therefore, CA was introduced into Fe(Ⅲ)/PAA system in this study to degrade oxytetracycline (OTC), and the degradation efficiency and mechanism of OTC in this system were systematically investigated. The results showed that the removal efficiency of OTC in Fe(Ⅲ)-CA/PAA system at pH 7.0 could reach 81.5% after 20 min, and the degradation of OTC followed pseudo-first-order kinetic. The addition of CA into Fe(Ⅲ)/PAA system could effectively reduce Fe(Ⅲ) to Fe(Ⅱ) driving the cycle of Fe(Ⅲ)/Fe(Ⅱ) and accordingly enhance the OTC removal in this system. According to the results of electron paramagnetic resonance (EPR) and scavenging experiments, hydroxyl radical (HO • ) and organic radicals (CH 3 C(O)O • and CH 3 C(O)OO • ) played major roles for the degradation of OTC in Fe(Ⅲ)-CA/PAA system. Four possible transformation paths of OTC in this system were proposed, including demethylation, hydroxylation, dehydrogenation and dehydration, based on five detected degradation products . This study provides an idea to improve PAA activation by Fe(Ⅲ) and broadens the practical application of Fe(Ⅲ) in advanced oxidation processes .
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BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Jiaying Song,Lun Lu,Jian Wang,Xue Li,Jinying Li,Qianwen Wang,Haiyan Du,Shuaishuai Xin,Lina Xu,Qinghua Yan,Chengzhi Zhou,Guocheng Liu,Yanjun Xin
Nano Y 2 O 3 -modified biochar composites (Y 2 O 3 @BC600) were fabricated successfully and exhibited great adsorption toward oxytetracycline (OTC). The Langmuir adsorption capacity of Y 2 O 3 @BC600-1:4 for OTC reached 223.46 mg/g, 10.52 times greater than that of BC600. The higher dispersion of Y 2 O 3 nanoparticles, increased surface area of 175.65 m 2 /g and expanded porosity of 0.27 cm 3 /g accounted for higher OTC adsorption by Y 2 O 3 @BC600-1:4. Y 2 O 3 @BC600-1:4 could resist the interference of co-existing cations (Na + , K + , Mg 2+ , Ca 2+ ) and anions (Cl − , NO 3 − , SO 4 2− ) on OTC removal. Y 2 O 3 coating changed surface charge property of BC600, favoring the contribution of electrostatic interaction. Synchrotron radiation-based Fourier transform infrared spectroscopy detected obvious peak shift and intensity change of surface –OH when OTC adsorption occurred. Accordingly, stronger H-bonding (charge-assisted hydrogen bond, OTC–H 2 N + ···HO–Y 2 O 3 @BC600-1:4) was proposed for OTC adsorption. Y 2 O 3 @BC600 exhibited renewability and stability in the adsorptive removal of OTC. Therefore, Y 2 O 3 @BC600 may be a novel and suitable adsorbent for antibiotic removal.
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Journal of Cleaner Production
·
2021
·
IF 9.297
Huiting Lin,Shijie Qiu,Zhihao Wu,Xiaoxia Ye,Minghua Liu
Efficient removal of oxytetracycline hydrochloride (OTC) from wastewater is of great significance but extremely challenging. Herein, a novel adsorbent lignin-based multi-metal ferrite biochar (FeNiZn-LBC) was synthesized through pyrolysis with controllable temperature and hydrothermal reaction using lignin of sinocalamus oldhami as raw material. The adsorption property of FeNiZn-LBC for OTC was systematically researched, and the results displayed that adsorption of FeNiZn-LBC to OTC accorded with the Langmuir model and the equilibrium adsorption capacity was 476 mg g −1 . Notably, FeNiZn-LBC can be regenerated with 0.100 mol L −1 NaOH. Additionally, we raised rational explanations for the mechanisms of adsorption behavior based on the zeta potential and XPS spectra. The adsorption of FeNiZn-LBC for OTC was mainly controlled by the electrostatic interactions, hydrogen bonds and complexation involving FeNiZn-LBC and OTC, especially the metal-oxide bond (M-O) generated after loaded with multi-metal ferrite played a positive role in the removal of OTC from water. Our work highlighted the potential of FeNiZn-LBC for excellent adsorption of OTC in next generation.
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TALANTA
·
2017
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IF 4.162
Fanwei Meng,Xiaoyuan Ma,Nuo Duan,Shijia Wu,Yu Xia,Zhouping Wang,Baocai Xu
This paper investigated a new detection method of oxytetracycline (OTC) in aquatic products with ultrasensitive detection limit. The method was constructed on the basis of raman hot spot between gold nanoparticles (AuNPs) (13 nm and 80 nm diameter respectively) linked by an DNA sequence . The DNA sequence combined with the OTC aptamer including its complementary sequence as well as a stem-loop structure. The raman signal molecule (4-MBA) was modified at the surface of 13 nm AuNPs. After the exposure of OTC, the aptamer sequence was preferentially combined with OTC and partially dehybridized with its complementary sequence which led the 13 nm AuNPs to get more closer to the 80 nm AuNPs. The raman intensity was thus increased for the more enhanced hot spot generated. Under the optimal experimental conditions, the SERS signal was positively related to the OTC concentration with a wide working range of 4.60×10 −2 –4.60×10 2 fg/mL and the limit of detection (LOD) was as low as 4.35×10 −3 fg/mL. The recovery rates of fishmeal ranged from 91.29–110.98%. The specificity of this method was further examined, and the results showed that the AuNPs based aptasensor was highly selective. This developed ultrasensitive aptamer-based SERS detection platform suggested that it may be a promising strategy for a variety of sensing applications.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
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IF 12.2
Peng Zhang,Guanghua Lu,Yu Sun,Zhenhua Yan,Leibo Zhang,Jianchao Liu
Microplastics and antibiotics are prevalent and emerging pollutants in aquatic ecosystems, but their interactions in aquatic food chains remain largely unexplored. This study investigated the impact of polypropylene microplastics (PP-MPs) on oxytetracycline (OTC) trophic transfer from the shrimp ( Neocaridina denticulate ) to crucian carp ( Carassius auratus ) by metagenomic sequencing. The carrier effects of PP-MPs promoted OTC bioaccumulation and trophic transfer, which exacerbated enterocyte vacuolation and hepatocyte eosinophilic necrosis. PP-MPs enhanced the inhibitory effect of OTC on intestinal lysozyme activities and complement C3 levels in shrimp and fish, and hepatic immunoglobulin M levels in fish (p < 0.05). Co-exposure of MPs and OTC markedly increased the abundance of Actinobacteria in shrimp and Firmicutes in fish, which caused disturbances in carbohydrate, amino acid, and energy metabolism. Moreover, OTC exacerbated the enrichment of antibiotic resistance genes (ARGs) in aquatic animals, and PP-MPs significantly increased the diversity and abundance of ARGs and facilitated the trophic transfer of teta and tetm . Our findings disclosed the impacts of PP-MPs on the mechanism of antibiotic toxicity in aquatic food chains and emphasized the importance of gut microbiota for ARGs trophic transfer, which contributed to a deeper understanding of potential risks posed by complex pollutants on aquatic ecosystems.
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ChemistrySelect
·
2024
·Vol. 10
·期 1
·e202405135
·
IF 1.9
Zhanmeng Liu,Mang Lu,Haitao Gan,Jiacheng Li,Guiqing Gao,Manqing Xu,Xianglian Wang
Graphical OTC molecules diffuse to the surface of FU3 to cause film diffusion, and continue to diffuse and fill into large-, medium- and micro-pores of FU3. FU3 can be π─π conjugated and cation─π bonded with the benzene rings and amino groups of OTC. The charged surface of FU3 leads to a strong electrostatic effect in the adsorption process. The doping of Fe 3 O 4 produces structural defects to promote the OTC adsorption. As one of the most stable metal-organic frame materials (MOFs), UiO-66 has attracted extensive attention in the adsorption field. However, the application of UiO-66 is still constrained by the weak electron-hole charge separation capability and the low accessibility of micropores. In this study, the mesoporous defects of UiO-66 were constructed with acetic acid and doped with Fe 3 O 4 to prepare magnetically recyclable Fe 3 O 4 @UiO-66. The doping of Fe 3 O 4 resulted in the formation of denatured mesoporous defects in UiO-66, which was conducive to adsorption oxytetracycline (OTC) in water. The crystal structure and physicochemical characteristics of Fe 3 O 4 @UiO-66 were examined. By using the static adsorption technique, the adsorption characteristics and mechanism of OTC on Fe 3 O 4 @UiO-66 were investigated. The results reveal that Fe 3 O 4 @UiO-66 has an adsorption capacity of 210 mg g −1 and an OTC removal ratio of 84.0%. The pseudo-second-order kinetics, Elovich, and Langmuir isothermal adsorption models were all applicable to the adsorption process. The adsorption process increased entropy and was an endothermic reaction. Solution pH has a little effect on the adsorption performance. This study provides the possibility of one-step synthesis of MOFs that can efficiently adsorb tetracycline antibiotics in water with low cost and excellent recyclability and reusablity.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chenzhang Liu,Jia Li,Min Zuo,Dickon H.L. Ng,Xiaohan Yang,Shuo Gao,Ziwei Lan
Antibiotic residues in water are closely related to human health and environment. Therefore, it is of great significance to detect and remove antibiotics in water. Here, by integrating nanozyme activity and self-propelled movement that can promote the mass transfer and diffusion in solution, a novel dual-functional CDs-LDHs@MnO 2 /Fe 3 O 4 magnetic micromotor with high exposed active sites for the detection and removal of oxytetracycline (OTC) was prepared by a biotemplate method. The micromotor could move autonomously in aqueous solution containing H 2 O 2 , reaching a mean speed of 158.35 ± 11.64 μm/s in 5 wt% H 2 O 2 . Due to the synergy of motion and the CDs-enhanced peroxidase-like activity, the micromotor could easily detect OTC in aqueous solution with a low detection limit (0.291 μM), wide detection range (0–100 μM), high selectivity, and a high magnetic recovery rate (near 85 %). More importantly, these micromotors also enabled rapid degradation of OTC through Fenton and Fenton-like reactions, reaching 87.93 % in the presence of 5 wt% H 2 O 2 . This work could provide a new idea for detecting and removing antibiotics from water.
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Materials
·
2024
·Vol. 17
·期 11
·2488
·
IF 3.1
Dongmei Zhao,Xinyao Wang,Libin Wang,Jingzhen Wang,Xu Wang,Weipeng Cheng
Antibiotic residues have been found to have potentially harmful effects on ecological and human health. Carbon nitride-based photocatalysts have widely focused on antibiotic photocatalytic degradation. Herein, we prepared Fe-modified g-C3N4nanorod bunches (FCNBs) using chemical vapor co-deposition. Specifically, through the process of calcination, a blend of urea and chlorophyllin sodium iron salt underwent an intriguing transformation, resulting in the integration of Fe into the framework of the g-C3N4nanorod cluster. The resulting photocatalyst exhibited remarkable stability and superior dispersibility. The prepared FCNBs had a unique structure, which was beneficial for increasing light absorption. Furthermore, the Fe species formed a chemical coordination with the g-C3N4matrix, thereby altering the electronic structure of the matrix. This modification facilitated charge transfer, prolonged the carrier lifetime, and enhanced light absorption, all of which significantly increased the photocatalytic activity. The oxytetracycline degradation efficiency of FCNBs was 82.5%, and they demonstrated outstanding stability in cycle trials. This work introduces a promising photocatalyst for the degradation of antibiotics.
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ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Jianbin Zhao,Jiayin Ling,Yu Chen,Wenjie Lin,Qiudong Hou,Tiangang Luan
The presence of residues of antibiotics and heavy metals in the global aquatic environment is a widespread potential environmental risk. Here, we studied their effect on Xenopus tropicalis by analysing the hepatotoxic effects of norfloxacin (NOR), oxytetracycline (OTC), and arsenic (As) on its histology, lipidomics, proteases, and cytokines. The results showed that development was inhibited, and additional vacuolation, sinusoids, pyknosis, nuclei, cell lysis, and leukocyte infiltration were observed in the liver after 72 days of exposure to NOR (0.1–4.0 mg L −1 ), OTC (0.1–4.0 mg L −1 ), and/or As (0.3–3.5 μg L −1 ). In addition, the size and number of lipid droplets increased with the superposition of drugs, disrupting lipid droplet homeostasis. Lipidomics proved that the intensity of lipid responses related to lipid metabolism was disrupted, especially for CerP and TAG. In addition, the lipotoxicity induced by joint exposure was more potent than that induced by a single exposure. Compared with the controls, the ROS levels in the liver were 7.21%–37.18% greater, which promoted oxidative stress damage. By revealing the underlying mechanisms involved, we found that the liver can resist oxidative stress and lipid peroxidation by regulating the expression of multiple cytokines. Our study provides new insights into the hepatotoxicity and underlying mechanisms in aquatic amphibians caused by long-term exposure to low concentrations of NOR, OTC, and/or As.
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NANO
·
2022
·
IF 1.438
Wan Gao,Yanliang Li,Wuming Xie,Jianzhi Huang,Lei Li,Zhixin Qiu
Antibiotics are a class of organic pollutant in the medical field for hundreds of years. Due to the continuous discharge of antibiotics in the environment, the phenomenon of pseudo-persistence of antibiotics is produced. Therefore, it is necessary to develop an advanced sustainable technology to remove antibiotics from water resources. In this study, Zeolite Imidazole Framework-8 (ZIF-8) was prepared by a simple and rapid method. Oxytetracycline (OTC) degradation was performed using ZIF-8 as a photocatalyst under visible light (VL) (500 W xenon lamp) irradiation. Under different experimental conditions, ZIF-8 has strong catalytic removal performance for OTC. When the reaction conditions are: OTC concentration of 80 mg L − 1 , ZIF-8 concentration of 1.0 g L − 1 , pH 5.96, the OTC removal rate is more than 90%. Through the detection and analysis of degradation intermediates, the possible degradation pathway of OTC was proposed. This study showed that the OTC removal rate of ZIF-8 could still reach 69% after four times of recycling. The results showed that the ZIF-8/VL system had high OTC removal efficiency and good recyclability.
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