RSC Advances
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2016
·Vol. 6
·期 79
·75855-75861
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IF 3.289
Qixuan Song,Hui Wang,Baoshan Yang,Fei Wang,Xinrong Sun
A novel silver nanoparticle-modified magnetic multi-walled carbon nanotube composite (Ag-FMWCNTs) was synthesized by embedding Fe3O4 and assembling Ag nanoparticles in one-step. The properties of the Ag-FMWCNTs composites and magnetic multi-walled carbon nanotubes (FMWCNTs) were studied by scanning electron microscopy, vibrating sample magnetometry (VSM) and Fourier transform infrared spectroscopy. The adsorption isotherms, adsorption kinetics and the effects of solution pH and ionic strength to adsorb emerging contaminant sulfamethoxazole (SMX) from aqueous solution on different multi-walled carbon nanotubes-based adsorbents were determined. The results showed that the adsorption kinetics could be explained well by means of the pseudo-second-order and intraparticle diffusion models. The pH experiments showed that maximum adsorption occurred at pH 4. Additionally, all adsorbents had a strong adsorption ability to SMX and the Langmuir maximum capacity followed the order: 5% Ag-FMWCNTs (118.58 mg g−1) > 3% Ag-FMWCNTs (86.41 mg g−1) > MWCNTs (73.69 mg g−1) > 1% Ag-FMWCNTs (70.26 mg g−1) > FMWCNTs (45.13 mg g−1). The spent adsorbents were regenerated in methanol. It was also found that after regenerating four times, multi-walled carbon composites retained up to 80% of their original adsorption performance. Therefore, the Ag-FMWCNTs composite could be used as a potential adsorbent for removing sulfamethoxazole from water.
研究领域:
环境科学
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纳米技术
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水污染控制
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吸附材料
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药物残留治理
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Tingyue Gong,Minghuo Wu,Shuo Liu,Yufeng Hu,Yiwen Zhang,Hao Zhou
The generation of high-valent cobalt-oxo species Co(IV)=O for the removal of organic pollutants has been challenging due to the low conversion efficiency of Co(III)/Co(II) and the high activation energy barrier of Co(II)-oxidant complexes. Here, we introduced oxygen vacancies into the material by incorporating Co(OH) 2 with chitosan to achieve a nano-complex Co(OH) 2 @CS, which was applied in the activation of peracetic acid (PAA) as oxygen vacancies could optimize the Co 3d orbital, improve the electron distribution in Co(OH) 2 , and accelerate activation of PAA. The reactive species were characterized by reactive oxygen species quenching, phenylmethylsulfoxide probing, and electron paramagnetic resonance (EPR), and the results confirmed that the Co(IV)=O was the predominant substance for the degradation process. After a systematical investigation of the reaction conditions, complete degradation of 4 typical SAs (10 mg/L) was achieved in 8 min. In addition, the system showed remarkable resistance towards inorganic (Cl - , H 2 PO 4 - and NO 3 - ) and organic compounds (humic acid) in real water (pond water and seawater). The degradation products/intermediates from sulfamethoxazole (SMX) were identified using liquid chromatography-high resolution tandem mass spectrometry, and the toxicity of these products was investigated by computational toxicology. It was found that the toxicity of most products was lower than their precursor SMX in terms of acute (all) and chronic toxicity (6 out of 7), indicating that this Co(OH) 2 @CS/PAA system was an environment-friendly approach for the treatment of SAs-containing wastewater.
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JOURNAL OF SEPARATION SCIENCE
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2026
·Vol. 49
·期 7
·e70470
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IF 3.6
Hanbing Li,Jie Wang,Yuyang Li,Yaming Li,Lei Yan,Sumei Li,Dayi Zhang,Yixuan Liang,Danyang Li,Xiaowei Wang,Sha Chen
A selective phase for tetracycline antibiotics (TAs) uptake was designed by incorporating [BMIM][PF 6 ]-functionalized ZIF-67-derived carbonaceous material into the diffusive gradients in a thin-films (DGT) device. This material, integrated in the binding gel of DGT (ta-DGT), exhibited specifically strong affinity toward tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC), with adsorption capacities of 12.22, 11.81, and 13.78 µg/disc, respectively. The ta-DGT showed preferential uptake of TAs over coexisting antibiotics and organic contaminants, with adsorption ratios above 80% and stable performance over pH 4–9 and ionic strength of 0.001–0.1 M. Mechanistic analysis indicated that π–π electron donor–acceptor interactions and cation–π bonding facilitated the specific targeting of TAs onto ta-DGT. During 7 days of field deployment in a domestic wastewater treatment plant in Beijing, ta-DGT showed 5–40 times higher detectable concentrations than conventional HLB/XAD DGT devices. These results validated its sensitivity, reliability, and feasibility for the selective separation and quantification of TAs in complex aqueous matrices.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Xuedong Zhang,Lele Ni,Mustafa Evren Ersahin,Hale Ozgun,Guoshuai Liu
Synergistic microenvironment enables low-energy electro-Fenton SMZ degradation. • Amino-CNT site enhances oxygen utilization and FeN 5 boosts •OH generation. • Stable SMZ removal over 20 cycles and across pH 3–11 and real water matrices. The practical effectiveness of the electro-Fenton (EF) technology is severely constrained by sluggish oxygen mass transport and inefficient activation of hydrogen peroxide (H 2 O 2 ). Herein, a synergistic catalytic microenvironment was constructed by integrating a biomimetic FeN 5 single-atom nanozyme with an amino-functionalized carbon nanotube support (CNT−NH 2 ) to overcome these dual challenges. Experimental and theoretical results reveal that the −NH 2 groups on CNT−NH 2 induce a local oxygen-enriched interface, significantly enhancing oxygen (O 2 ) supply and promoting the 2e − oxygen reduction reaction (2e − ORR) for efficient in situ H 2 O 2 generation. Simultaneously, the FeN 5 sites facilitate hydroxyl radical (•OH) production by mimicking peroxidase activity, thereby lowering the activation energy for O−O bond cleavage in H 2 O 2 . The resultant FeN 5 −CNT−NH 2 EF system achieves complete degradation of sulfamethoxazole (100% in 45 min) with a remarkably low specific energy consumption (0.0235 kWh g −1 TOC), and demonstrates excellent stability and broad applicability in complex water matrices. This work provides a novel perspective for constructing high-performance EF process through synergistic microenvironment engineering. Download: Download high-res image (144KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Yu Xiao,Yangqi Liu,Xi Zhang,Jinping Cheng,Pin Gao
PVC MPs disrupt the spatial purification gradient in constructed wetlands. • PVC MPs accelerate the collapse of denitrification and inhibit sulfamethoxazole removal. • PVC MPs intensify the deterministic community assembly and fragment microbial co-occurrence networks. • PVC MPs reverse the attenuation trend of ARGs and enrich ARG-harboring pathogens. Co-occurrence of antibiotics and microplastics (MPs) in constructed wetlands (CWs) poses substantial threats to stable pollutant removal performance. However, their long-term combined impacts on the functional integrity of CWs along spatial flow paths remain poorly understood. Although the individual effects of sulfamethoxazole (SMX) on CWs have been extensively documented, this study established replicated continuous-flow horizontal subsurface flow CWs fed with SMX-spiked wastewater to systematically investigate effects of polyvinyl chloride (PVC) MPs on pollutant removal and microbial community assembly. The results showed that PVC MPs exerted negligible effects on overall removal of organic carbon and ammonia, but significantly accelerated decline in denitrification and SMX degradation along the flow direction. Relative to the SMX-only control system, the final removal efficiencies of total nitrogen and SMX in the microplastic exposure system were 6.0% and 15.3% lower, respectively. PVC MPs disrupted the inherent spatial purification gradient along flow direction, triggered unexpected pollutant accumulation and concentration inversion, and intensified deterministic process of microbial community assembly. This shift suppressed proliferation of core functional denitrifying taxa (e.g., Zoogloea and Comamonas ), while favoring growth of stress-tolerant generalist taxa. Functional metagenomic prediction revealed that these taxonomic shifts were accompanied by disruption of spatial functional gradients associated with carbon and nitrogen metabolic pathways. PVC MPs amplified ecological risks by converting the downstream section of CWs into hotspots for antibiotic resistance genes (ARGs), resulting in upregulated expression of genes related to cell motility and membrane transport, which facilitated horizontal gene transfer of sul1 , sul2 , and intI1 . This MP-induced selective pressure drove enrichment of potential ARG-carrying pathogens in the outlet zone. These findings provide novel mechanistic insights for risk assessment of MP-antibiotic co-contamination in engineered CW systems. Download: Download high-res image (212KB) Download: Download full-size image
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Sustainable Materials and Technologies
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2026
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IF 9.7
Qiang Chen,Lei Xu,Le Liang,Chen Chen,Xiao-He Wu,Baoling Yuan,Ming-Lai Fu
With the large-scale disposal of spent lithium-ion batteries (SLIBs) and the ongoing accumulation of organic pollutants in water bodies, the resource recovery of solid waste and water pollution control have emerged as critical challenges in the environmental field. To address the dual challenges of SLIBs and persistent organic pollutants, a nickel‑cobalt‑manganese oxide catalyst (NCM-APS) was synthesized via hydrothermal treatment of SLIB leachate with ammonium persulfate (APS) for peroxymonosulfate (PMS) activation. The catalyst featured a nanostructured morphology, large surface area, and abundant hydroxyl groups, enabling efficient PMS activation. Under optimized conditions, nearly complete removal of 10 μmol/L sulfamethoxazole (SMX) was achieved within 20 min, and 82.4% removal of 50 μmol/L SMX occurred within 1 h. The catalyst exhibited favorable stability to a certain extent, maintaining activity in the presence of common coexisting ions (Cl − , NO 3 − , SO 4 2− ) and after repeated cycles. Reactive species analysis suggested the generation of SO 4 • − , HO • , 1 O 2 , and O 2 • − , with 1 O 2 as the predominant oxidant. High-resolution mass spectrometry and Fukui function analysis elucidated the SMX degradation pathway. This work demonstrates a sustainable strategy for SLIB upcycling and highlights the practical potential of PMS-based advanced oxidation processes in wastewater treatment.
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·124035
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IF 7.5
Li Xue,Yin Wang,Nanya Zhong,Yukun Xue,Li Wu,Kama Huang,Jiesi Luo
Microwave plasma technology, particularly the three-layer coaxial low-temperature atmospheric pressure microwave plasma jet, offers a promising solution for pollutant degradation due to its electrode-free design and low microwave energy consumption. However, a comprehensive evaluation of its performance in antibiotic degradation has been lacking. To tackle this challenge, this study evaluates the effectiveness of this microwave plasma jet in degrading two widely used antibiotics, sulfamethoxazole and oxytetracycline, as well as their combined mixture. The results show that the proposed technology achieves excellent degradation and mineralization efficiencies. The removal rates for the mixed antibiotic solution are 11.13% and 26.28% higher than those for sulfamethoxazole and oxytetracycline individually. In order to optimize the experimental design, explainable artificial intelligence models were developed to predict degradation efficiency and identify key influencing factors. The computational models demonstrated high predictive accuracy, with Pearson correlation coefficients ranging from 0.978 to 0.991 when validated on independent datasets. Furthermore, free radical capture experiments revealed the critical role of hydroxyl radicals in the degradation process. Bio-toxicity assessments confirmed the ecological safety of the microwave plasma treatment. Finally, the analysis of reaction intermediates proposed potential degradation pathways, providing a molecular-level understanding of the degradation process. In conclusion, this study highlights the three-layer coaxial low-temperature atmospheric pressure microwave plasma as a highly effective technology for antibiotic removal and offers valuable insights for its application in wastewater treatment.
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Surfaces and Interfaces
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2026
·
IF 6
Huan Song,Le Song,Fangzhou Wu,Yonglei Xing,Xiaoyong Jin,Fang Wan,Gang Ni
Non-metal doping provides a route to tune metal sites in carbon catalysts for peroxymonosulfate (PMS) activation. Here, a phosphorus-modified N-doped carbon catalyst with an ultralow cobalt loading (Co2-P1-NC; 0.14 wt% Co) was prepared. Under optimized conditions, the Co2-P1-NC/PMS system removed phenol (Ph) within 2.5 min, with an apparent pseudo-first-order rate constant of 2.068 min −1 . Co-free NC and P-NC showed only limited activity, indicating that Co-containing sites account for most of the catalytic enhancement. Quenching tests, electron paramagnetic resonance (EPR), PMSO probing, in situ Raman spectroscopy, electrochemical measurements, and premixing experiments collectively support the coexistence of radical and nonradical routes, with high-valent Co species and interfacial electron transfer making major contributions under the tested conditions. Density functional theory calculations using representative CoN 4 and CoN 3 P models showed that P substitution made PMS adsorption more favorable (from −2.56 to −3.38 eV), whereas the calculated O–O bond length and Bader charge changed only slightly; the adsorption enhancement is therefore attributed mainly to altered geometry and interfacial electronic interactions. P modification also reduced the measured Co leaching concentration from 0.016 to 0.005 mg L −1 . The catalyst rapidly removed several phenolic pollutants, although activity declined during reuse and was inhibited by carbonate and humic acid. These results demonstrate a promising low-Co catalyst design while identifying stability and water-matrix effects as priorities for further development. Download: Download high-res image (308KB) Download: Download full-size image
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ENVIRONMENTAL POLLUTION
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2026
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IF 7.2
Bianxia Li,Hongjuan Zhu,Huiting Song,Huanan Li,Wanli Cheng,Jiashu Liu,Zhengbing Jiang
Laccase–mediator systems (LMS) can be used to degrade antibiotics due to their electron–transfer mechanism. However, the impact of mediators on conformational changes in laccase structure remains unclear. In this study, we aimed to elucidate the mechanisms underlying the degradation of tetracycline and sulfamethoxazole in the presence of different mediators using molecular dynamics simulations. The presence of mediators influences the partial conformation and compactness of laccase. Among the selected mediators, caffeic acid (CA) induced a β–sheet to loop transition within the active binding pocket of laccase, and enhanced the binding stability of laccase–antibiotic complexes. Residue–level energy decomposition revealed that CA shifted the binding model from electrostatic to hydrophobic interactions in the laccase–tetracycline system, whereas it enhanced π–π stacking and hydrophobic effects in the laccase–sulfamethoxazole system. In vitro degradation experiments confirmed that LMS CA could degrade > 90% of tetracycline and sulfamethoxazole. When degrading mixed antibiotics, the removal reached 88.17% for tetracycline in 3 h and 98.71% for sulfamethoxazole in 1 h. Protocatechuic acid, a structural analog of CA, exhibited the same effect as CA in promoting antibiotic degradation. Specifically, tetracycline degradation reached 95.10% at 2 h, and sulfamethoxazole degradation reached 94.89% at 1 h. The degradation pathways were elucidated via LC–MS. Toxicological assays confirmed a significant reduction in the toxicity of antibiotics. Mixed sulfamethoxazole and tetracycline could be degraded by LMS CA in simulated contaminated freshwater. Overall, elucidating the mechanism via in silico study benefits LMS design and highly efficient removal of antibiotics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Boding Zhang,Xiaobo Feng,Jumei Wang,Zhenluo Yuan,Shuyan Guan,Jiameng Liu,Yunhui Yan,Dong Liu,Tianjun Ni,Baozhong Liu
Cobalt-modulated D-A 3D-COF for superior photocatalytic PMS activation. • Efficient exciton dissociation and enhanced charge separation. • Outstanding pollutant removal and reduced ecological toxicity. The practical application of covalent organic frameworks (COFs) in photocatalytic peroxymonosulfate (PMS) activation is often constrained by sluggish charge kinetics and limited mass transfer. Herein, we construct a series of three-dimensional (3D) donor-acceptor (D-A) COFs to concurrently address these dual challenges. The unique 3D architecture features interconnected porous channels that provide accessible pathways for reactant transport, while metalloporphyrin based D-A engineering significantly enhances charge separation and migration. As a result, the optimized 3D Co COF combines an accessible hierarchical pore network with accelerated charge kinetics, achieving 95.25% SMX removal within 100 min under visible light. Combined experimental and theoretical analyses confirm that the 3D D-A structure with cobalt incorporation fine-tunes the electronic configuration, reduces the exciton binding energy, and facilitates the generation of reactive oxygen species. Moreover, the system exhibits robust continuous-flow performance under visible-light irradiation and effective SMX degradation under natural sunlight, together with favorable detoxification and antibacterial activity. This work highlights the great promise of 3D COFs in overcoming intrinsic kinetic and transport limitations for advanced oxidation processes. Download: Download high-res image (314KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Hao Wang,Jianbin Ju,Yuji Ruan,Guihua Ruan,Yipeng Huang
Pre-oxidation‑carbonization regulated PAN-derived porous carbon flowers, preventing collapse and enabling N/O co-doping. • PCF-400's 400 °C carbonization retains active sites, enhancing adsorption efficiency of NSAIDs. • PCF-400 exhibits superior NSAIDs selectivity, high NSAIDs adsorption (Qe ≥ 12.69 mg g −1 ) and fast kinetics (5 min equilibrium). Flower-shaped porous carbons are attractive in separation science. Herein, the controlled synthesis of porous carbon flowers (PCF) was realized by pre-oxidation and carbonization treatments of flower-shaped polyacrylonitrile (PAN) particles. The pre-oxidation treatment at 230 °C transferred the linear polymer chain of PAN to six-membered ring structure, enhancing the thermal stability to avoid the collapse of flower-shape in carbonization process. Then, the subsequent carbonization promoted the crosslinking and formation of alicyclic and graphitic structures. The carbonization at moderate temperature (400 °C) enabled the remaining of some oxygen-containing groups and the formation of nitrogen-doped carbon structure, which was responsible for the improved adsorption efficiency for non-steroidal anti-inflammatory drugs (NSAIDs). In addition, higher adsorption efficiency of PCF than that of porous carbons in other morphologies for NSAIDs was demonstrated. The PCF carbonized at 400 °C (PCF-400) showed sufficient adsorption capacity (12.69–18.59 mg g −1 ) and selectivity for NSAIDs. An SPE-HPLC method based on PCF-400 was proposed for extraction and analysis of trace NSAIDs in environmental water samples. The SPE-HPLC method showed a wide linear range (1–400 ng mL −1 ) and low detection limits (0.38–0.56 ng mL −1 ) for three kinds of NSAIDs. The intra-day and inter-day relative standard deviations (RSDs) of this method were 1.85%–2.77% and 3.17%–3.63%, respectively. The recoveries of NSAIDs in spiked samples ranged from 89% to 103% by the SPE-HPLC method. This study not only provides a simple synthetic method for preparing carbon materials with controllable morphology and adjustable heteroatom content, but also offers an analytical method for detection of trace NSAIDs in complex environmental matrices. Download: Download high-res image (126KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Hongyang Liu,Tiancheng Gao,Jian Zhang,Xin Cheng,Zheng Xing,Lina Li,Haina Bai
Constructed MOF-in-LDHs to regulate morphology and anchor active sites. • Ternary metal redox cycles coupled with ETP boosted PMS activation. • Ion resistance and cycling stability enable continuous-flow application. Although the development of catalysts with high activity and stability is still a major problem, advanced oxidation processes based on peroxymonosulfate (PMS-AOPs) show promise for the degradation of antibiotics. In this work, FeCu-LDH with an initial fish-scale embroidered spherical morphology was reconstructed during ZIF-67 growth, forming a unique 3D structure with ZIF-67 nanoparticles confined on lamellar substrates. This structure not only provides ideal anchoring sites for ZIF-67 but also alleviates its self-agglomeration and metal ion leaching via spatial confinement. Under optimized conditions, 2 mg of the catalyst achieved 95.12% norfloxacin (NOR) removal within 30 min; positively charged LDHs stabilized negatively charged PMS, while ZIF-67 Co sites triggered the continual production of reactive oxygen species (ROS). DFT calculations showed ZIF-67/FeCu-LDH efficiently activates PMS by enhancing adsorption and interfacial electron transfer. A continuous-flow reactor with this catalyst maintained >90% NOR removal for 8 h, showing good practical potential. Quenching experiments and EPR confirmed SO 4 ·- , ·OH, ·O 2 − and 1 O 2 generation; electrochemical tests verified the participation of type III electron transfer pathway (ETP(III)), with radical-non-radical coupling promoting NOR degradation. Mechanistically, FeCu-LDH lamellar confinement enhances Fe/Cu/Co redox cycles and accelerates electron transfer, supplying sufficient electrons for PMS activation. This study proposes a potential method for designing MOF-in-LDHs composites, providing a reference for the treatment of water contaminated by antibiotics.
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