JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Nabi Bux,Danruo Luo,Shan Qian,He Guo,Sadam Hussain Tumrani,Razium Ali Soomro,Guodong Zhang,Qiuling Ma,Jian Zhou,Tiecheng Wang
The wide occurrence of sulfonamide antibiotics in water environments poses a great threat to ecological system and human health. Cobalt-based catalysts are well known for advanced oxidation processes (AOP), but the synergistic role of heteroatoms is still uncertain. In this work, a new type of heterogeneous Co based catalyst with sulfur as the ligand (Co@S-N-C) was transferred through a straightforward one-pot pyrolysis approach for efficient activating peracetic acid (PAA) to degrade sulfadiazine (SDZ). Systematic characterization confirmed that the co-doping by S and N in carbon induced the formation of several cobalt species (Co 0 , Co 2+ , and Co 3+ ) and built a unique electronic structure featuring in abundant defects and large specific surface area. The Co@S-N-C/PAA system exhibited exceptional catalytic efficacy, accomplishing total SDZ degradation in 25 min and a substantial mineralization rate of 78.2% within 90 min, markedly surpassing the performance of single heteroatom-doped catalysts (Co@N-C and Co@S-C). Mechanistic investigations indicated that •OH and CH 3 COO• contributed 66.4% and 34.1% to SDZ degradation, respectively. DFT calculations revealed that S-N co-doping increased the electron transfer from low-valent cobalt sites to PAA, promoting O-O bond splitting. The catalyst exhibited excellent stability with 71% activity retention and minimal Co leaching (5%) after four cycles. Based on these results, five primary degradation pathways for SDZ were proposed, and the results of ecotoxicity analysis showed that the transformation products were less toxic. Overall, this work provides significant insights into the development of high-performance dual-heteroatom-doped catalysts to form the PAA-mediated AOP for wastewater treatment.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·122002
·
IF 7.5
Qian Zhang,Shiyun Xu,Qingjun Fan,Jiaojiao Zhang,Xiaofeng Zhou,Tianran Sheng,Fuying Hao,Liangquan Sheng,Zhaodi Liu,Huajie Xu
Lattice strain is commonly acknowledged as an effective strategy for tuning the catalytic activity of transition metals, yet its direct impact on Fenton-like reactions remains not fully understood. Herein, we introduce compressive strain into CoMn 2 O 4 via thermal expansion effects in conjunction with a component regulation strategy to enhance peroxymonosulfate (PMS)-based Fenton-like activation. Structural analysis reveals that the compressively strained features enhance metal-oxygen bond coupling and induces the formation of a substantial amount of oxygen vacancies, which promote PMS adsorption and interfacial charge transfer. The obtained CoMn 2 O 4 (2:1)/PMS system demonstrates efficient and stable removal of organic pollutants via dominant nonradical pathways ( 1 O 2 ), and the reaction kinetics was enhanced from 0.078 min −1 to 0.264 min −1 , and the removal rate for sulfadiazine (SD) was as high as 99.8% within 30 min after five cycles. Furthermore, the remarkable feasibility of the CoMn 2 O 4 (2:1)/PMS system for practical wastewater treatment in real river water and pharmaceutical effluents was demonstrated, particularly through the development of a catalytic membrane filtration system and an in-situ floating water treatment device. This study offers new insights into the design of high-performance PMS activation catalysts via lattice strain engineering.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Yizhe Ding,Jiacheng Shi,Yuqian Lin,Qiya Sun,Yuxiang Zhao,Xi Wang,Qian Ping,Lin Wang,Yongmei Li
In this study, a novel riboflavin-mediated ultraviolet/peracetic acid system (RF/UV/PAA) was developed to enhance the degradation of ranitidine. Under optimal conditions, ranitidine was completely removed within 15 min, leading to a 68.9% mineralization rate due to the combined action of radical (hydroxyl radicals (·OH) and carbon-centered organic radicals (R-C·) and nonradical (singlet oxygen ( 1 O 2 )) reactive oxidative species (ROS). Electron paramagnetic resonance and quenching experiments indicated that RF significantly promoted ROS generation, with the respective contributions of ·OH, R-C· and 1 O 2 to ranitidine removal being 54.5%, 15.8%, and 24.3%, respectively. Demethylation, monooxygenation, dioxygenation, and C-S bond cleavage were identified as the primary degradation pathways for ranitidine. These pathways were initially inferred from structural analysis of transformation products (TPs) and subsequently validated through density functional theory (DFT) calculations and the TP-Transformer model. Furthermore, an integrated DFT-machine learning (ML) framework was employed to elucidate the degradation mechanism, with a specific focus on the interactions of principal molecular features with ROS. The results revealed that FractionCSP3 (SHAP value = 0.30) and MolWt (SHAP value = 0.44) were the dominant predictors of ·OH and 1 O 2 reactivity, respectively, whereas FormalCharge (SHAP value = 0.40) governed the R-C·-mediated processes. In addition, SHAP-based interaction analysis revealed that electron-rich sites facilitate ·OH attack, conjugated π-systems promote 1 O 2 reactivity, and molecular polarization drives R-C· reactions. Our study provides not only an effective technology for ranitidine removal but also a quantitative, interpretable framework for predicting reactivity and guiding the design of photo-assisted advanced oxidation processes.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Tang Gongwen,Shen Lu,Li Lu,Wang Liang,Liu Luofeng,Yang Yang,Chen Chong,Guo Hao,Wang Chengpeng,Ren Tingting
Organic coatings tend to lose their
corrosion protection
during
service in a marine environment. In this study, a dual-layer composite
polyurethane (c-PU) coating consisting of a superhydrophobic bottom
layer and a self-healing polyurethane surface layer was designed for
durable corrosion protection. The bottom layer was constructed by
bonding praseodymium-loaded polyaniline-modified hexagonal boron nitride
(Pr 3+ @PANI@h-BN) nanoparticles with epoxy resin. The surface
layer was prepared by the synthesized self-healing polyurethane with
dynamically reversible Diels–Alder covalent bonds. Tafel polarization
curve tests demonstrated that the c-PU coating exhibited significantly
improved corrosion resistance, with a corrosion current density as
low as 95.17 pA/cm 2 . The electrochemical impedance spectroscopy
revealed that the low-frequency impedance modulus of the pristine
c-PU coating was 8.9 × 10 8 Ω·cm 2 , which decreased to 9.9 × 10 4 Ω·cm 2 after scratching. Upon thermal heating at 130 ° C for
10 min, the value returned to 8.7 × 10 8 Ω·cm 2 , indicating complete restoration of its barrier properties
against corrosion media. In summary, the bottom layer provides corrosion
inhibition through active corrosion inhibition, passivation, and a
physical barrier, while the surface layer maintains integrity via
its self-healing ability. The synergy of the two layers enables the
coating to deliver long-term protective performance in harsh corrosive
environments, offering a promising strategy for extending the service
life of marine steel structures.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Cuiyan Li,Shuai Zhang,Haibo Ouyang,Li Wang,Xinnuo Wang,Xinge Niu,Xilin Wang,Xiaoyue Sun,Yumiao Xing,Jiaqi Liu,Mengyao He
Aiming at the urgent demand for multifunctional materials integrating thermal protection, stealth performance and load-bearing capacity in the field of next-generation hypersonic aircraft, this study develops a facile, template-free self-expansion foaming route to fabricate carbon fiber-reinforced porous (Hf, Zr, Ti)C medium-entropy ceramics, denoted as C f /(Hf, Zr, Ti)C (HZT). The influence of carbon fiber content (0–10 wt%) on the microstructure, thermophysical properties, mechanical performance, and electromagnetic wave absorption characteristics is systematically investigated. The synergistic mechanism among lattice distortion-induced polarization enhancement, porous structure-mediated multiple scattering, and carbon fiber-constructed conductive networks is elucidated, which effectively breaks the inherent trade-off between thermal insulation, mechanical strength, and microwave absorption in conventional porous ultra-high temperature ceramics. The sample with 6 wt% carbon fiber (HZT-06) possesses a porosity of 70.2% and a low density of 0.67 g/cm 3 . It exhibits a room-temperature thermal conductivity of 0.253 W m −1 K −1 , exceptional broadband microwave absorption with a minimum reflection loss (RLmin) of −59.69 dB and an effective absorption bandwidth (EAB, RL ≤ −10 dB) of 6.32 GHz at a matching thickness of 2.3 mm, and a high compressive strength of 49.62 MPa. This work realizes the multifunctional integration of low thermal conductivity, high load-bearing capacity and strong broadband microwave absorption at room temperature, and provides promising design strategies and fundamental data support for the development of advanced multifunctional thermal protection materials for hypersonic vehicles.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Haiyang Xie,Yuhan Chen,Xianni Li,Xiaoling Lu,Hao Lin,Yanjuan Zhang,Zuqiang Huang,Huayu Hu,Tao Gan
The selective oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) is one of the effective methods for synthesizing chlorine-free benzaldehyde, but developing an efficient catalytic system remains a challenge. The peroxymonosulfate (PMS) is an inexpensive and soluble solid oxidant that has been widely used in oxidation reactions in aqueous media, however, there are still difficulties in activating PMS using atomically dispersed metal catalysts based on non-free radical pathways. Herein, an atomically dispersed manganese catalyst (Mn 1 /NLC), featuring electron-deficient Mn–N 2 O 2 sites anchored on a nitrogen and oxygen co-doped carbon support, is synthesized through a combined process of ball milling and high-temperature pyrolysis. The Mn 1 /NLC catalyst exhibits outstanding performance in the selective oxidation of BzOH to BzH by efficiently activating PMS, achieving 98.5% BzOH conversion and 99.2% BzH selectivity with a high turnover frequency of 1470.6 h −1 within 3 h at a PMS dosage of 10 mg and 45 °C, which surpasses the majority of the reported catalysts. Electron paramagnetic resonance, radical quenching experiments, and electrochemical analysis collectively reveal that the Mn–N 2 O 2 reaction sites lead to the formation of a high-valent Mn species, which enhances the adsorption of C H bonds and activation of PMS to significantly promote the occurrence of non-radical oxidation pathway, including singlet oxygen ( 1 O 2 ) generation and electron transfer processes (ETP). The synergistic effect of 1 O 2 and ETP enables Mn 1 /NLC to perform efficient and selective C H oxidation of various aromatic alcohols under mild conditions, while also demonstrating excellent cycling stability. This study provides a novel strategy for the design of high-performance atomically dispersed metal catalysts for the selective oxidation of aromatic alcohols.
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Shaozhi Liu,Honggang Zhang,Zeyan Wang,Hefeng Cheng,Peng Wang,Zhaoke Zheng,Ying Dai,Baibiao Huang,Yuanyuan Liu
Catalytic ozonation offers a promising approach for removing perfluorinated compounds, yet developing catalysts with both high activity and stability remains a great challenge due to severe metal ions leaching. Herein, we design a Mn single atom decorated γ-AlOOH catalyst (denoted as Mn x /γ-AlOOH), which displays efficient catalytic ozonation towards perfluorooctanoic acid (PFOA) removal. Under optimal conditions, Mn 2.2 /γ-AlOOH achieves a defluorination ratio of 99.39% after 15 h of catalytic ozonation process, with a distinctive low leaching percentage (0.52% for Mn and 0.21% for Al, compared to 10.44% for Mn leaching from MnO 2 and 0.95% for Al leaching from γ-AlOOH). Comprehensive analysis indicates that the introduction of Mn single atom optimizes the electronic structure and provides an additional indirect electron transfer pathway, which not only facilitates O 3 activation, but also reduces Mn ion leaching by decreasing electron loss, and simultaneously enhances the activity and stability of the catalyst. This work provides new insights into enhancing the activity and stability of catalysts during the catalytic ozonation process via the rational design of atomically dispersed sites.
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Water
·
2026
·Vol. 18
·期 16
·2045
·
IF 3.5
Yuanxun Cheng,Pin Gan,Xuan Chen,Yuanyuan Zhang
The combination of ultraviolet (UV) and periodate (PI) is a promising advanced oxidation process. We investigated the inactivation of a typical harmful algae species,Heterosigma akashiwoby UV/PI treatment and explored the inactivation mechanism at the cellular and molecular levels. The inactivation efficacy ofH. akashiwoby UV/PI and UV treatment alone was 9.21-ln and 1.23-ln within 37.5 min, respectively. Hydroxyl radicals (•OH) and singlet oxygen (1O2) contributed toH. akashiwoinactivation in the UV/PI system. Obvious destruction of the cell structure observed by transmission electron microscopy and the increases in extracellular DNA levels indicated membrane damage by the reactive species. The activity changes in the antioxidant enzymes and the decreases in ATP contents ofH. akashiwoafter UV/PI treatment were both more severe than that after UV treatment. The results indicated that the antioxidant defense system and the mitochondria ofH. akashiwocells were disrupted. The photosynthesis was also affected as both of the chlorophyll-a content and the maximum dark-adapted photochemical efficiency (Fv/Fm) ofH. akashiwodecreased obviously. The transcriptomics analysis proved that UV/PI treatment caused abnormal energy metabolism and cell function. Moreover, the down regulation of gene expression enriched in the phagocytic pathway indicated that the cell was severely damaged and inactivated under oxidative stress.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Congling Yang,Qianying Guo,Xiaobo Gong,Yong Liu
Piezocatalysis holds great potential for advanced oxidation processes (AOPs), yet the practical application of conventional powder catalysts is severely hindered by their poor recoverability and reusability. To overcome the limitation, a polyvinylidene fluoride (PVDF)-based piezocatalytic nanofibrous membrane embedded with manganese-doped bismuth sodium titanate (BNMT) was fabricated via electrospinning, with polyethylene glycol (PEG) incorporated as a hydrophilicity enhancer under sonication. Under ultrasound-assisted peroxymonosulfate (PMS) activation in a continuous-flow system, the optimized membrane (0.3B-PEG-PVDF) achieved 90.7 % degradation of tetracycline hydrochloride (TC, 10 mg/L) within 60 min. Quenching experiments and electron paramagnetic resonance spectroscopy revealed a unique mixed radical/non-radical pathway, with singlet oxygen ( 1 O 2 ) and hydroxyl radical (•OH) as the dominant reactive species. The piezocatalytic membrane maintained over 77 % TC removal after eight consecutive cycles, with negligible metal leaching and excellent anti-interference performance in real water matrices. This work provides a facile strategy for constructing efficient, recyclable piezocatalytic membranes and advances the practical application in continuous-flow wastewater treatment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Die Yuan,Kai Li,Xuebin Lu,Chaoqin Zhao,Guijian Zhang,Ping Ning,Dongdong Zhang,Xin Sun,Shuangyou Bao,Chi Wang
A dual-channel electron-donation pathway enables reductant-free Fe 2+ /Co 2+ regeneration. • Pollutants and S 2- synergistically drive reversible M(III)/M(II) redox cycling. • Co 9 S 8 /FeS/PMS achieves rapid and complete levofloxacin degradation within 10 min. A magnetic Co 9 S 8 /FeS composite derived from cobalt slag was developed for reductant-free PMS activation through a novel dual-channel electron-donation pathway involving S 2- species and levofloxacin (LEV). The catalytic performance and mechanism were investigated through degradation kinetics, reactive-species identification, X-ray absorption fine spectroscopy (XAFS), X-ray photoelectron spectroscopy (XPS) analyses, density functional theory (DFT) and life cycle assessment. The Co 9 S 8 /FeS/PMS system completely degraded LEV within 10 min (k = 0.4498 min −1 ), maintained efficient removal over pH 3.0–11.0 and after five cycles (>95%), with 1 O 2 as the dominant reactive species. DFT calculations, together with XAFS/XPS analyses, revealed that S 2− and LEV serve as dual electron donors to facilitate Fe 3+ /Co 3+ reduction, achieving nearly complete Fe/Co redox cycling and sustained PMS activation. Compared with conventional single-electron-donor Fenton-like systems, this strategy eliminates the need for external reductants and substantially reduces environmental impacts, offering a sustainable route for converting cobalt slag into recyclable catalysts for antibiotic wastewater treatment. Download: Download high-res image (176KB) Download: Download full-size image
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Xiangning Xu,Yi Wu,Keke Wang,Sai Bai,Jin Qian
A CN-supported CoFe 2 O 4 catalyst was rationally developed to intensify peroxymonosulfate (PMS) activation for tetracycline degradation through interfacial electronic regulation. Beyond conventional structure-centered strategies, this study identifies directional electron donation from CN to CoFe 2 O 4 as the fundamental origin of catalytic enhancement, which accelerates the Co (III)/Co (II) and Fe (III)/Fe (II) redox cycles and thereby sustains PMS activation. Consequently, the composite delivers markedly superior catalytic reactivity, pronounced tolerance to ionic perturbation, and robust performance in complex aqueous matrices. Quenching and EPR analyses collectively reveal a nonradical-dominated oxidation regime, in which 1 O 2 serves as the principal reactive species, accompanied by minor contributions from O 2 • - , SO 4 • - , and •OH. XPS further corroborates the dynamic valence evolution of Co and Fe, validating an electron-transfer-assisted redox cycling mechanism. LC-MS and toxicity assessment demonstrate stepwise tetracycline transformation with an overall attenuation of mutagenic risk. These findings establish interfacial electron flow as a governing descriptor for PMS activation and provide a mechanistic framework for catalyst design at the electronic-structure level.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Chang Liu,Yujing Huang,Yiyi Ma,Shuang Song,Tao Chen,Feng Jiang,Chenghan Wang,Feilong Dong,Tuqiao Zhang
During long-term operation, drinking water distribution pipelines develop complex inner-wall deposits composed of corrosion scale, sediments, and biofilm, which can serve as reservoirs and secondary sources of organic micropollutants and heavy metals. Conventional pipe cleaning technologies mainly rely on physical scouring to remove deposits, but offer limited capacity to control micropollutant release during cleaning. Here, a peroxymonosulfate/citric acid (PMS/CA) modified ice slurry was developed to integrate physical cleaning with in situ organic contaminant degradation and heavy metal removal. Results showed that CA complexed with iron species to maintain soluble Fe(II) in the reaction system and accelerate Fe(III)/Fe(II) redox cycling, thereby enabling continuous PMS activation and sustained reactive oxygen species generation. Under optimized conditions, the modified ice slurry achieved 90.88% degradation of carbamazepine within 10 min, accompanied by an overall reduction in predicted product toxicity. Meanwhile, CA enhanced the removal of Cr(VI) and Cd(II) from pipe scale matrices by promoting solubilization, which also lowered the risk of rerelease during subsequent stagnation. Validation under near realistic operating conditions further demonstrated the practical applicability of the modified ice slurry for pipeline cleaning. Life cycle assessment indicated that PMS/CA modified ice slurry imposed the lowest environmental impacts across most categories at an equivalent pollutant removal level among the compared oxidation and cleaning technologies. This study provides an effective and environmentally pipe cleaning strategy for coordinated deposit removal and micropollutant control in drinking water distribution systems.
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