SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Feiyue Qian,Xi Chen,Yu Yan,Xiao Chen,Lingzhao Kong,Ming Gao,Shiqian Gao
To explore the feasibility of enhancing the electroactivity of coffee ground biochar (CBC)-based carbon mats through controlled incorporation of reduced graphene oxide (rGO), various carbon mats consisting of powdered activated carbon (PAC), CBC, and rGO were fabricated and applied for the removal of representative antibiotics via peroxymonosulfate (PMS) activation under continuous filtration. The effects of the operational modes, water matrices, and target pollutant types on the performance of cathodic electroactive membranes were systematically investigated under limited carbon loading. Results indicated that non-radical singlet oxygen attack and surface-confined oxidation were the dominant pathways for target pollutant removal by CBC/rGO electroactive membranes. The membranes exhibited distinct oxidative selectivity, with a higher oxidation capacity for electron-donating group-bearing sulfonamides (sulfamethoxazole: 96.2% removal) than for electron-withdrawing group-bearing fluoroquinolones (levofloxacin: 62.6% removal) over a short contact time within the carbon mats, as evidenced by the removal efficiencies of both target pollutants and dissolved organic carbon. Density functional theory calculations and liquid chromatography-mass spectrometry analysis revealed that antibiotic degradation involves hydroxylation, C–N/C–O bond cleavage, and aromatic ring opening, which are closely correlated with the structural and electronic properties of the target pollutants. Notably, Ecological Structure-Activity Relationships toxicity predictions demonstrated that several degradation intermediates posed higher developmental and mutagenic toxicity risks than their parent compounds, thereby highlighting the necessity of regulating the oxidative selectivity in electroactive membranes and developing effective post-treatment processes for filtrates to mitigate such toxic risks.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Ziqi Cai,Yangyang Zhang,Yi Liu,Hongyi Zhang,Zhenghua Zhang
An electrocatalytic Cu-GHM system with tunable nanoconfined spaces is constructed. • The electrified system enables 73%–100% degradation of 13 emerging contaminants. • 100 h of continuous operation is demonstrated without loss of structural integrity. • The electrified system also exhibits high energy efficiency (0.07 kWh/m 3 ). • DFT calculations and MD simulations elucidate the degradation mechanism. Persulfate-based advanced oxidation processes are promising for removing refractory contaminants from aquatic systems, however, their performance is often constrained by limited reactive oxygen species utilization and restricted mass transfer. Although spatial confinement engineering of electrocatalytic membranes has improved persulfate activation, the underlying structure–property–performance relationships remain insufficiently understood. Here, we report an electrochemical peroxomonosulfate activation system employing a three-dimensional graphene hydrogel-supported copper nanoparticle membrane (Cu-GHM) as the cathode. The system demonstrated broad applicability, achieving 73%–100% degradation across 13 representative emerging contaminants in real water matrices. Its long-term stability was further confirmed through a 100-h continuous operation test specifically using ranitidine as the model pollutant. By regulating pore architecture through controlled compression, the nanoconfined space was tuned from 13.5 to 5.0 nm, revealing a strong dependence of catalytic performance on confinement scale. The smallest pore size (5.0 nm) resulted in an 8.1-fold enhancement in degradation kinetics, attributed to increased local reactant concentration, improved mass transport, and facilitated interfacial electron transfer. Comprehensive spectroscopic analyses and molecular dynamics simulations elucidated the confinement-enhanced catalytic pathways and mass-transfer behavior. This study provides mechanistic insights into synergistic nanoconfinement and electric-field effects, offering a rational framework for designing energy-efficient electrified membrane systems for water treatment. Download: Download high-res image (250KB) Download: Download full-size image
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JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Yanling Hu,Yanshu Chen,Ruitong Li,Ximan Wang,Sigen A,Yunfeng Wu,Dehui Bian,Siqi Bao
Constructed an S-scheme g-C 3 N 4 /Ce-MgAl-LDH heterojunction via hydrothermal method. • Achieved complete TC-HCl degradation in 20 min under visible light with H 2 O 2 synergy. • Identified superoxide radicals as dominant species and proposed three degradation pathways. • Revealed enhanced charge separation via Ce doping and S-scheme interfacial transfer. • Demonstrated 85.3% stability after five cycles with reduced ecotoxicity of intermediates. Antibiotic contamination, especially by tetracycline hydrochloride (TC-HCl), presents significant environmental and health challenges. In this study, a 3D flower-like g-C 3 N 4 /Ce-MgAl-LDH composite was synthesized for effective TC-HCl degradation. In situ XPS and DFT calculations confirmed that the formed S-scheme heterojunction enhances charge separation while maintaining strong redox capabilities. Response surface methodology (RSM) identified pH as the key factor influencing degradation efficiency. Under optimized conditions, the catalyst achieved complete TC-HCl removal within 20 min and a mineralization efficiency of 39.8% based on TOC analysis. Quenching experiments and EPR spectroscopy revealed superoxide radicals (·O 2 - ) as the primary reactive species. The composite also demonstrated excellent environmental adaptability, broad-spectrum activity, and cyclic stability, retaining 85.3% of its activity after five successive cycles. This work combines an advanced S-scheme photocatalyst design with RSM-guided optimization, offering a practical strategy for antibiotic wastewater treatment. Mechanism diagram of TC-HCl degradation in the CN/LDH-15%/H 2 O 2 /Vis system Download: Download high-res image (190KB) Download: Download full-size image
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Shida Zhang,Yingqiang Li,Chenghao Wu,Yongyi Zhang,Zheyu Wang,Zhigang Yang,Feiyong Chen,Xue Shen,Rupeng Liu
UV 254 and turbidity removals reached 79.5% and 94.3%, respectively. • Maximum OFX removal reached 93.0% under optimized dosages. • DO-derived microbubbles were retained in three-dimensional floc networks. • Charge neutralization, bridging, adsorption, and flotation jointly drove removal. The persistent presence of antibiotics in aquatic environments, often coexisting with natural organic matter (NOM), poses potential ecological and health risks. In this study, a quaternized chitosan derivative (CTS-DAC) and polyaluminum chloride (PAC) were used to construct a rapid spontaneous flotation system for the removal of NOM and ofloxacin (OFX). CTS-DAC, prepared by grafting DAC onto chitosan, exhibited high charge density and a branched structure, thereby enhancing charge neutralization and adsorption bridging. Characterization of the flocs and coagulants indicated that the removal of NOM and OFX was governed by charge neutralization, adsorption bridging, sweep flocculation, and hydrogen bonding. Notably, NOM could associate with OFX, thereby facilitating antibiotic removal. At dosages of 2 mg/L PAC as Al 3+ and 6 mg/L CTS-DAC, the removal efficiencies reached 79.5% for UV 254 and 94.3% for turbidity. Density functional theory (DFT) calculations exclude strong O 2 chemisorption at hydroxyl-related sites, while electrostatic potential (ESP) analysis indicates enhanced surface polarity after CTS-DAC modification. Together with the DO-regulation experiments, these results suggest that the flotation behavior resulted from dissolved oxygen (DO) release and microbubble retention within the floc network. The highest OFX removal efficiency was obtained at dosages of 10 mg/L PAC as Al 3+ and 30 mg/L CTS-DAC, whereas stable spontaneous flotation was achieved within 20 min at PAC + CTS-DAC ratios of 1:1.5–1:2.5. This flotation time was substantially shorter than the separation time required in conventional coagulation systems (30–60 min). This work offers new insights into the efficient treatment of antibiotic-contaminated water and provides a strategy for optimizing coagulation processes. Download: Download high-res image (226KB) Download: Download full-size image
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FOOD CHEMISTRY
·
2025
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IF 9.8
Guangxin Yang,Jingru Zhang,Junyu Zhang,Peng Wang,Wei Xia,Jun Wang,Xiaosheng Shen,Cong Kong
Antibiotic use in aquaculture leads residues in aquatic products, contributing to antimicrobial resistance and potential human toxicity. Complex sample matrices hinder detection. This study uses wolfberry biomass waste-derived biochar as a novel solid-phase extraction (SPE) sorbent to detect 26 antibiotic residues (14 fluoroquinolones, 12 sulfonamides) in aquatic products, effectively repurposing agricultural waste into a high-performance, eco-friendly material. The mesoporous structure of the biochar enables rapid diffusion of antibiotics into its interior, facilitating highly efficient adsorption. Adsorption kinetics follow a pseudo-first-order model, reaching equilibrium in 60 min. The superior adsorption performance enables the prepared biochar to serve as an SPE sorbent for drug residue analysis with stable performance over at least three reuse cycles. The SPE was used for real samples analysis based on HPLC-HRMS, and the detection limits was 1–4.5 μg·kg −1 , recoveries was 75–119 %. Validation against the national standard GB 31658.17–2021 confirms method practicality and reliability.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Changjun Xia,Xushuai Chen,Jincui Gu,Panpan Zhang,Chunjia Luo,Ruiqi Zhao,Xiaohan Niu,Luke Yan
Weak intersheet interactions induce interlayer swelling in 2D MXene membranes, limiting their otherwise promising practical application in water purification. Herein, we developed an anti-swelling MXene-based membrane for water purification. Supramolecular hydrogen bonding between MXene and graphitic carbon nitride (CN) nanosheets enabled the formation of a tightly packed structure. Concurrently, covalent interactions involving polydopamine (PDA) and polyethyleneimine (PEI) enhanced cross-linking, which created a nanoconfined interlayer space to suppress swelling. Notably, the MXene/CN@PDA/PEI membrane maintained a stable interlayer spacing of 15.27 ± 0.08 Å even after 700 h of water immersion—outperforming most reported MXene-based membranes. Furthermore, its broad light absorption and narrow bandgap (~2.10 eV) enabled superior self-cleaning performance. In cyclic tests, it retained ~90.7 % flux recovery after 40 h, demonstrating that nanoconfinement effectively suppresses swelling and stabilizes active sites. This study presents an effective approach for developing high-performance MXene membranes featuring anti-swelling and self-cleaning capabilities, aimed at sustainable water purification.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yinghao Li,Ying Li,Qinglong Meng,Jingyi Zhang,Ke Jing,Qingyu Guan
Oxygen vacancies (OVs) are widely used in photocatalytic H 2 O 2 generation for water remediation, and phosphate is a common ion in natural water. However, the potential mechanism regarding how phosphate influences the photocatalytic performance of OVs remains unclear. The role of phosphate in the photocatalytic H 2 O 2 generation by the OVs and subsequent contaminant degradation during OVs photocatalysis was investigated. Phosphates primarily formed complexes with Bi at OVs, altering the local electronic structure and O 2 adsorption pattern of this active site. This reduced the energy barrier for the formation of reactive oxygen species. The formation of complexes at OVs transforms H 2 O 2 generation pathway changed from two-step one-electron to one-step two-electron, thereby increasing H 2 O 2 generation. The H 2 O 2 product exhibited excellent in-situ pollutant treatment performance. This study provides valuable insights for optimizing environmental remediation strategies by exploring the effect of phosphate on the photocatalytic H 2 O 2 generation.
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MICROCHEMICAL JOURNAL
·
2026
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IF 5.2
Shunli Ji,Jinqiu Xu,Hong Shen,Xiaofei Ma
This study is the first to apply polymeric deep eutectic solvents (PDES) for enantioseparation in capillary electrophoresis (CE). We prepared two types of PDESs using poly(diallyldimethylammonium chloride) (PDDA) as the hydrogen bond acceptor and two polyhydroxy compounds as hydrogen bond donors. Due to the stable positive charges of this PDES, it can adsorb negatively charged chiral selectors (carboxymethyl-β-cyclodextrin, CM-β-CD) in the buffer solution, self-assembling to form composite nanoparticles. We characterized the PDES and composite nanoparticles using nuclear magnetic resonance, infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, particle size analysis and the Tyndall effect. The nanoparticles provided a rich platform for chiral separation. We optimized several important separation parameters and successfully separated five chiral drugs. The results indicated that, compared to the single CM-β-CD system, the separation of model drugs was significantly improved in the composite nanoparticles system. Furthermore, we investigated the related chiral recognition mechanism using nuclear magnetic resonance method. The proposed composite nanoparticles exhibit a simple structure, is easy to prepare, and possesses superior separation performance. This research not only broadens the application of DES for enantioseparation in CE but also enriches the variety of chiral functionalized nanomaterials, taking a crucial step towards the development of new chiral recognition materials.
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JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Shijie Xing,Zhikun Li,Jiaxiang Liu,Wei Zhang,Fuqiang Sun,Shu-Xuan Liang
To address the ongoing issue of quinolones (QNs) residues in aquatic products, accurate and sensitive detection of trace QNs has always been necessary and urgent. In this work, a composite material of NH 2 −MIL-125(Ti)@TpBD(SO 3 H) 2 consisting of metal organic frameworks and based on bisulfonic acid-based covalent organic frameworks was synthesized and applied as a dispersive solid-phase extraction (dSPE) adsorbent. Combining with liquid chromatography-tandem mass spectrometry, a simple and effective method for simultaneous detection of 18 QNs in aquatic products was established. Meanwhile, the selective adsorption mechanism was thoroughly investigated through material characterization combined with density functional theory calculations. The results showed that the method had a good linear relationship ( r ≥ 0.9981), low limits of detection of 0.0019–0.0641 μg kg⁻¹, along with high recovery rates in the range of 80.6–113.2 %, and good precision with relative standard deviations less than 8.8 %. The selective adsorption mechanism revealed the synergistic adsorption mechanism of electrostatic interactions, hydrogen bonding, and π-π interactions. The material had good reusability and excellent stability. In summary, the dSPE method based on NH 2 −MIL-125(Ti)@TpBD(SO 3 H) 2 composites provided a practical sample pretreatment solution for the determination of trace QNs in complex matrixes.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Xue Wang,Zhaoyang Zhou,Shuang Jiang,Qi Sun,Xianlu Lei,Yong Xie,Tao Le
Norfloxacin (NOR) has been widely applied in animal husbandry and aquaculture because of its potent antibacterial activity, broad-spectrum efficacy and cost-efficient. Nevertheless, its inappropriate use may result in teratogenic and carcinogenic risks to humans, making the accurate and rapid detection of NOR residues in food critically important. In this study, a strong affinity (Kd = 84 nM) and high selectivity anti-NOR aptamer was obtained by screening with Graphene Oxide Systematic Evolution of Ligands by Exponential Enrichment (GO-SELEX), and a colorimetric aptasensor was fabricated. The limit of detection of the aptasensor was 1.04 ng/mL, and the linear range was 1.56-100 ng/mL. Average recoveries of the aptasensor in shrimp and fish sample analyses ranged from 89.33% to 103.24%, accompanied by coefficients of variation from 3.63% to 9.43%, indicating good analytical precision and accuracy. The aptasensor constructed in this study showed high consistency with the High-Performance Liquid Chromatography (HPLC) for NOR detection, indicating that it is an efficient and promising sustainable strategy for monitoring NOR.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ming Zhang,Jiacheng Li,Lijun Wu,Tian Liang,Jian Liu,Lu Wang
Acetamiprid (ACE) can accumulate in the environment through the food chain, potentially endanger human health. In this experiment, zinc‑cobalt bimetallic metal organic framework (Zn/Co MOF) was synthesized and used to activate peroxymonosulfate (PMS) for the removal of ACE from water. The degradation efficiency of ACE could achieve approximately 96.93% after 90 min. Through the synergistic effect of Zn and Co bimetallic sites, ACE was degraded via a Fenton-like reaction, while reactive oxygen species (SO 4 ·- , ·OH, O 2 ·- , and 1 O 2 ) participated in the process. The high catalytic activity of Zn/Co MOF led to the degradation of ACE through the formation of a series of low-toxicity intermediates, and partial mineralization to CO 2 and H 2 O. In addition, Zn/Co MOF remained effective under broad pH conditions (pH 5–11) and temperatures (5–45 °C). This system had excellent degradation effects in actual water, with degradation rates of 95.42% and 95.18% after 90 min in the Pai River and Liren Lake, respectively. With its high catalytic performance, the Zn/Co MOF is expected to become an ideal catalyst that could be used to remove pesticide residues in water.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·142
·
IF 5.4
Liu Guangmei,Liu Zeqi,Yang Yu,Hu Yanling,Liu Qingye,Zhou Jingli
Chitosan with different molecular weights (i.e., CS 200 and CS 2 ) as the ligand was employed to stabilize copper nanoclusters (CuNCs), developing a fluorescence “turn-on” probe to recognize fluoroquinolones. Chitosan chains not only can prevent the CuNCs from oxidation and overgrowth, but also provide the regulable luminescence and aggregation-induced emission (AIE) behaviors. The experimental results revealed that the CS 200 @CuNCs probe displayed better sensitivity, selectivity and anti-interference towards ciprofloxacin and several other specific fluoroquinolones than CS 2 @CuNCs. When recognizing the analytes, a more obvious AIE phenomenon occurred in CS 200 @CuNCs. The ciprofloxacin concentration for linear response was 1.0 ~ 180 µM, with a detection limit of 0.067 µM. Moreover, the CS 200 @CuNCs probe could be practically used to determine the ciprofloxacin residue from real samples with good recoveries, implying the perspective in various scenarios. These advantages are attributed to the flexile chain conformation for chitosan in CS 200 @CuNCs, which can generate the reasonable spatial-constraint. This structural feature significantly promotes the recognition and capture of target molecules. This work paves a distinctive way for designing novel biosensors by regulation of the ligand chain length, demonstrating high potential for rapid antibiotic screening.
Section
Graphical
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