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.
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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.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Songjia Luo,Xianzhi Dou,Lu Wang,Lei Zheng
Chloramphenicol (CAP) residues in milk pose severe health risks, yet current detection methods (e.g., chromatography-mass spectrometry) suffer from complexity and high costs. In this work, we address this gap by developing an ultrasensitive aptamer-gated graphene Field-effect biosensor. A self-assembled Aptamer-functionalized solution-gated graphene transistor (Apt-SGGT) was engineered via systematic optimization of aptamer surface density to overcome spatial-confinement limitations and enhance conformational switching efficiency. We applied the Apt-SGGT biosensor to the analytical determination of CAP in actual skim milk samples, achieving a detection limit as low as 21.5 pM with a spiked recovery rate of 97.65 % ± 5.72 %. This study not only presents a promising platform for the rapid, on-site detection of antibiotic residues in complex food matrices but also provides a generalizable interfacial engineering strategy to enhance the performance of aptamer-based field-effect biosensors.
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Xinge Ju,Guantong Liu,Xin Sun,Haiyang Lv,Zhanye Yang,Shutong Zhang,Yuan Tian,Bing Zhao
This work developed a dual-mode sensor based on aptamer regulation of silver core-cuprous oxide shell (Ag@Cu 2 O) nanozyme activity for kanamycin detection. The synthesized Ag@Cu 2 O nanoparticles served as both a surface-enhanced Raman scattering activity (SERS) substrate and a peroxidase-like catalytic activity. The aptamer adsorbed on the Ag@Cu 2 O surface enhanced the nanozyme activity through electrostatic interactions with positively charged 3,3′,5,5′-tetramethylbenzidine (TMB). This promoted the oxidation of TMB to blue oxidized 3,3′,5,5′-tetramethylbenzidine (ox-TMB) by hydrogen peroxide (H 2 O 2 ). Upon kanamycin binding, the colorimetric absorbance and SERS intensity decreased. The SERS mode achieved a linear range of 0.01–1 μM and the limit of detection (LOD) of 1.78 nM. The colorimetric mode provided a linear range of 0.1–1 μM and a LOD of 47.7 nM. Good recoveries (92.48–102.57%) and low relative standard deviations (RSD < 5.0%) were achieved in spiked honey and mutton samples. This dual-mode design offered potential for food safety monitoring of kanamycin residues.
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WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
·
2026
·Vol. 42
·期 1
·37
·
IF 4.2
Qiu Xianjin,Huang Jian,Zhang Hua,Wang Jinhua,Luo Tao,He Chunhua
As an emerging pollutant widely present, antibiotics pose a potential threat to biological wastewater treatment. However, studies on the impact of mixed antibiotics on biologicalnitrogen removal are limited. Three norfloxacin (NOR)-oxytetracycline (OTC) ratios (R1-R3) were established using the direct equipartition ray method and uses high-throughput sequencing technology and PICRUSt2 to evaluate the impact of mixed antibiotics at different concentrations on nitrogen removal efficiency, microbial community structure, and metabolic functions. The results show that the inhibitory effect of mixed antibiotics on nitrogen removal efficiency increases with concentration. Low-concentration mixed antibiotics (≤ 10 mg/L) have a negligible impact on biological nitrogen removal performance, whereas high-concentration mixed antibiotics (≥ 10 mg/L) severely affect it. Specifically, compared with the blank group, in the high-concentration group, effluent NH 4 + -N increased from 0.91 mg/L to 23.58–29.34 mg/L, while COD increased from 27.75 mg/L to 277.38-307.31 mg/L. High-throughput sequencing showed that, as the concentration of mixed antibiotics increased, the relative abundance of key denitrifying bacteria ( Thauera and Hydrogenophaga ) significantly decreased. Co-occurrence network analysis indicates that antibiotic mixtures with similar concentrations promote the enrichment of core nitrogen cycling groups and induce new community defense mechanisms. PICRUSt2 functional prediction showed that mixed antibiotics primarily inhibited the synthesis of microbial ABC transporters, Amino acid biosynthesis and Two-component systems, collectively disrupting microbial protein synthesis and proliferation, thereby reducing nitrogen removal efficiency. This study clarifies the mechanistic effects of mixed antibiotics on microbial metabolic pathways and provides a theoretical basis for the risks of emerging pollutants in biological wastewater treatment.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
·
IF 4.8
Siting Zhou,Shuyi Qin,Qin Zhang,Baizhen Yuan,Yan Pang,Jiali Liang,Jinqiu Yang,Hai-Bo Liu,Jing Wang
The increasing environmental contamination by tetracycline antibiotics (TCs) necessitates efficient detection and removal strategies. This study presents the development of a bifunctional material, Eu-NU-1000, which integrates ratiometric fluorescence detection and high-capacity adsorption of TCs. The material is constructed by doping europium ions (Eu 3+ ) into the zirconium-based metal-organic framework (MOF) NU-1000, offering a dual-channel fluorescence response for selective TCs detection and enhanced adsorption performance. Eu-NU-1000 enables highly sensitive and selective detection of TCs through ratiometric fluorescence at 617 and 472 nm, the detection mechanism was based on antenna effect and photoinduced electron transfer, with a low limit of detection (LOD): 22.14 nM for tetracycline and 11.83 nM for oxytetracycline. Furthermore, the material exhibits a high adsorption capacity of 440.6 mg·g −1 for tetracycline, surpassing several existing MOF-based adsorbents. The study also investigates the adsorption mechanisms, including electrostatic interactions, coordination chelation, and π-π stacking, which collectively contribute to the exceptional tetracyclin removal efficiency of Eu-NU-1000. The material maintains over 80% adsorption efficiency after five regeneration cycles, highlighting its reusability and practical applicability in environmental remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Gengchen Hu,Shizhao Liu,Yiming Zhang,Yao Jiang,Dongmei Xi
The widespread use of aminoglycoside antibiotics has raised serious concerns regarding food safety and environmental health, necessitating advanced methods for their sensitive and multiplexed detection. However, conventional techniques struggle to directly quantify these small molecules with sufficient sensitivity and specificity. Here, we present an ultrasensitive and simultaneous sensing platform for kanamycin (KAN) and tobramycin (TOB) that synergistically merges a target-triggered DNA walker with a biological α-hemolysin (α-HL) nanopore. In this design, aptamer recognition of the antibiotic activates a DNAzyme-based walker immobilized on magnetic beads, which then processively cleaves a track strand to release hundreds of DNA reporter probes per binding event. This dual-amplification strategy of catalytic chemical amplification coupled with single-molecule physical readout enables exceptional sensitivity, achieving detection limits as low as 3.88 fM for KAN and 4.62 fM for TOB. The sensing platform exhibits excellent selectivity and successfully accomplishes the simultaneous quantification of both antibiotics in a mixture. When applied to spiked environmental water samples, the method demonstrates high accuracy and reliability, yielding satisfactory recovery rates. This work establishes a generalizable DNA walker–nanopore paradigm, offering a versatile blueprint for the development of highly sensitive, multiplexed, and rapid detection systems for a wide range of small-molecule contaminants.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Caixia Deng,Shuang Li,JiaYu Wang,Yingying Li,Jian Chen,Fenglin Tang,Xiupei Yang
Type II heterojunction photocatalysts were fabricated by compositing BiOBr with TiO 2 , with samples labeled BiOBr/TiO 2 -1 to BiOBr/TiO 2 -5 (the number denotes the mass of TiO 2 in mg used during synthesis). Among these, BiOBr/TiO 2 -2 (containing 100 mg TiO 2 ) exhibited optimal visible-light photocatalytic performance for oxytetracycline hydrochloride (OTC) degradation, achieving 94.38 % removal within 60 min. High-resolution transmission electron microscopy (HRTEM) confirmed successful composite formation through the observation of dual lattice spacings (0.28 nm for BiOBr (1 1 0) and 0.35 nm for TiO 2 ). This composite displayed a superior degradation rate constant of 0.04757 min −1 , exceeding those of pristine BiOBr and TiO 2 by factors of 2 and 14, respectively. The enhanced activity was attributed to effective charge separation enabled by the Type II heterojunction structure. Radical trapping experiments combined with electron paramagnetic resonance (EPR) analysis identified photogenerated holes (h + ) and superoxide radicals (•O 2 − ) as the dominant reactive species. HPLC–MS analysis revealed degradation intermediates, and toxicity assessment predicted progressive detoxification during the process. This study demonstrated that BiOBr/TiO 2 -2 is a stable and efficient photocatalyst with significant potential for antibiotic wastewater treatment.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 4
·1-24
·
IF 3
Feng Qi,Zeng Guanli,Du Xiaopei,Yang Hang,Liu Zisen,Liu Yunli,Bai Guoliang,Xia Shibin,Wu Zhenbin,Feng Wei,Zhang Yi
The alkali fusion-magnesium modified oil-based drilling cuttings ash (AM-Mg-OBDCA) was synthesized and characterized for its capacity to remove Cd(II) from aqueous solutions. Adsorption kinetics conformed to the pseudo-second-order model, underscoring a chemisorption-dominated mechanism, while Langmuir isotherm analysis determined a maximum adsorption capacity of 440.2 mg/g. Post-adsorption structural and chemical transformations, confirmed by SEM, FT-IR, XRD, and XPS analyses, revealed the contributions of electrostatic attraction, ligand exchange, surface precipitation, and cation exchange. Photocatalytic tests demonstrated that the CdS-A/M-g-C 3 N 4 (2:1) composite exhibited superior degradation of oxytetracycline hydrochloride (OTC) under visible light, suggesting potential applications in environmental remediation. However, reusability tests indicated a marked decline in adsorption capacity after initial use, pointing to the need for further material optimization. Overall, AM-Mg-OBDCA shows promise as an effective adsorbent for Cd(II) removal and a precursor for photocatalytic materials, offering a sustainable approach to wastewater treatment and resource recovery.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Hui Li,Long Zhou,Zuliang Chen
Aquaculture wastewater is contaminated with antibiotics such as oxytetracycline (OTC), which presents a serious threat to the environment and public health. In this study, Fe Co MOF@MIP combining 2D bimetallic metal organic framework (MOF) with molecular imprinting technique was prepared for removing typical antibiotic-OTC from mariculture wastewater. Batch experiments indicated that the maximal capacity of adsorption of Fe Co MOF@MIP to OTC was 36.9836 mg/g at 303 K, higher than that of Fe Co MOF@NIP. The large number of spatial recognition sites in the blotting layer provides specific selectivity, and adsorption mechanism might be associated with the electrostatic adsorption process, hydrogen bonding and complexation among OTC and Fe Co MOF@MIP. The adsorption process fits a quasi-secondary kinetic model with R 2 = 0.9966, suggesting that the rate of adsorption is dominated by a physical adsorption mechanism involving the sharing of electrons among the Fe Co MOF@MIP and OTC. In the presence of interference, the blotting factor of Fe Co MOF@MIP was 11.77, which demonstrated that the as-synthesized materials possess the excellent selectivity. Moreover, the synthesized nanosheets exhibited excellent reusability, with 16.61 mg/g OTC removal achieved using the Fe Co MOF@MIP after reuse on three occasions. These findings highlighted here is the promising role of Cu Co MOF nanosheets in wastewater treatment, particularly for the selective removal of antibiotics.
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Nature Communications
·
2026
·
IF 18.1
Zhao Lekai,Li Qiang,Han Shuang,Ma Xiao,Zhou Ming,Wang Qiuyue,Feng Shasha,Low Ze-Xian,Zhong Zhaoxiang,Xing Weihong
Humic acid (HA), a complex organic compound of natural matter, is harmless on its own but can form carcinogenic disinfection byproducts, such as trihalomethanes and haloacetic acids, during water chlorination and disinfection processes, posing serious risks to aquatic organisms and human health. We present a B-site dual-metal-doping strategy to fabricate ferromagnetic perovskite-type adsorbents for rapid and efficient HA degradation. Perovskite oxides, specifically LaFeO 3 , were selected for their unique crystal structure, tunability, and inherent ferromagnetic properties. By doping Ti and Co at the B-site, we created a bifunctional perovskite absorbent that exhibits a rapid HA adsorption rate with a high adsorption capacity of 381 mg g -1 , while also enabling regeneration in situ or magnetic recovery for Fenton regeneration. Computational simulations provide molecular-level insights into the interactions between the perovskite adsorbent and HA. Our findings reveal the potential of perovskite materials as highly effective, regenerable catalytic adsorbents for organic compounds, paving the way for their development in sustainable water remediation applications.
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Journal of Analysis and Testing
·
2026
·
IF 9.4
Su Jin-yuan,Cai Shuai,Wang Xi-xi,Cui Yuan-yuan,Yang Cheng-xiong
In this work, we present the synthesis of a pillar[5]arene-based microporous organic network (MON) and its combination with magnetic microspheres to construct novel MP[5]A-MON composites for efficient magnetic solid-phase extraction (MSPE) of four phthalate esters (PAEs) from complex samples. The designed MP[5]A-MON composites integrate the advantages of Fe 3 O 4 , pillar[5]arene macrocycles, and MON networks, providing multiple interaction sites, including host-guest, π–π stacking, and hydrophobic interactions, along with rapid magnetic separation (< 15 s) for PAE extraction. Under optimized conditions, the established MP[5]A-MON-MSPE-HPLC-UV method demonstrates wide linear ranges (0.5–1000 µg/L), low limits of detection (0.15–0.75 µg/L), high enrichment factors (94.9–97.1), minimal adsorbent consumption (4 mg), and a short extraction time (6 min). This study not only pioneers a new category of MON materials but also highlights the potential of pillar[n]arene-based MONs in the enrichment and separation of environmental contaminants.
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