CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shipeng Tang,Han-jian Hu,Xinyi Chang,Hongyan Zhang,Yu Chen,Yicheng Li,Wei-xiong Li,Xiaolong Hu,Xiaoyong Liao,Gang-Biao Jiang
Rational utilization of the competition among internal functional groups in chemical adsorbents for heavy metal ions can significantly enhance adsorption efficiency, while also driving the development of advanced adsorbents. This study proposes an innovative strategy employing a group competition mechanism to develop a dual-function platform for Cd(II) detection and adsorption, along with field detection applications. Nitrogen-doped graphene quantum dots (NGQDs) anchor the Cd(II) detection agent, 5,10,15,20-tetrakis(1-methyl-4-pyridinio)porphyrin tetra( p -toluenesulfonate) (TMPyP), onto sodium alginate chains to form an aerogel (T-NGQDs-CAA). FT-IR and XPS characterizations confirm that NGQDs facilitate a rapid Cd(II) transfer pathway through electrostatic interactions and π-π stacking. The Cd(II) detection speed of T-NGQDs-CAA is enhanced fivefold, while density functional theory analysis reveals that TMPyP exhibits a significantly stronger binding affinity toward Cd(II) compared to nitrogen- and oxygen-containing groups. Combined experimental and theoretical analyses demonstrate that this rapid ion transfer pathway intensifies TMPyP’s competition for Cd(II), thereby promoting the coordination reaction between TMPyP and Cd(II). Additionally, the Cd(II) adsorption by T-NGQDs-CAA follows the pseudo-second-order kinetic and Langmuir isotherm models, exhibiting a 148.7% increase in saturation adsorption capacity. This strategy, through constructing rapid ion channels with NGQDs and leveraging the group competition mechanism, enables in-situ Cd(II) detection and removal, enhancing the understanding and application of interactions between functional groups and metal ions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Linyun Mou,Ya Lu,Jiale Ma,Shuwei Shu,Jianlong Li,Ganpeng Li
In response to the rapid quality degradation of peaches due to post-harvest decay, this study developed a composite film for preservation. Two primary pathogens responsible for peach decay, Aspergillus flavus and Talaromyces funiculosus , were identified. Molecular docking attributed to the main binding position of citral and geraniol's interactions with type I polyketide synthase on their antifungal effects, as well as the caffeic acid with its tyrosinase on antioxidant efficacy. β -CD-MOFs were synthesized via vapor diffusion, demonstrating exceptional spatial loading via SEM. CEOs (citral + geraniol) encapsulated in β -CD-MOFs were incorporated into a chitosan/pullulan matrix, yielding a film with 260.27 % fracture tensile strain, significantly ( P < 0.001) outperforming pure chitosan (21.87 %), possessing excellent mechanical properties, and the improvement in the water solubility of the film facilitates the release of active compounds. The utilization of a compositel film on peaches has shown significant efficacy in controlling decay index ( P < 0.05), weight loss ( P < 0.05), firmness ( P < 0.05) and production of malondialdehyde ( P < 0.05). Compared to untreated controls, the treated peaches exhibited an extended shelf life of 2 days, highlighting the superior preservation capabilities of the film. Hence, the film presents a promising solution for fruit preservation.
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Agronomy-Basel
·
2025
·Vol. 15
·期 12
·2913
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IF 3.4
Xue Zhou,Lianfang Li,Mengqi Kang
The antagonistic geochemical behaviors of cadmium (Cd) and arsenic (As) in co-contaminated soils complicate their simultaneous remediation. This study aimed to develop a synergistic immobilization strategy by convertingSpirulinaresidue into a magnetic biochar-layered double hydroxide composite (FSRBL). The composite was applied to both acidic red and calcareous black soils, and its effects on Cd and As, immobilization efficiency, and ecotoxicity were evaluated. The results showed that FSRBL effectively transforms Cd and As from mobile fractions to stable residual forms. At a 2.5% application rate, FSRBL achieved remarkable immobilization efficiencies of 39.2% for Cd and 57.5% for As, representing effectiveness 3.55 and 5.97 times higher than that of unmodified biochar, respectively. A dose–response relationship between the application amount of FSRBL and the immobilization efficiency of As and Cd was observed and further quantified using a logistic model. The results indicate that while increased FSRBL application enhances immobilization efficiency, the marginal benefit of each additional unit diminishes as the application rate increases, demonstrating a significant diminishing marginal effect. According to the ecotoxicity assessment experiment, the soil leachate from FSRBL-amended soil remarkably decreased the ecological toxicity to rice (Oryza sativaL.). Mechanistic investigations employing SEM/TEM-EDS, XRD, and XPS revealed that the synergistic immobilization could be ascribed to the multi-component cooperation within FSRBL, which resolved the conflicting pH/Eh requirements for the immobilization of Cd and As: (1) the LDH phase efficiently immobilized As oxyanions through anion exchange and isomorphic substitution; (2) the magnetic Fe phase concurrently immobilized Cd2+and As oxyanions via redox transformation and coprecipitation, resulting in the formation of precipitates such as Fe/Ca/Cd–As(V). This work demonstrates a feasible approach to upcycle biomass waste into a value-added material for sustainable remediation of Cd–As co-contaminated soil.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Jiachuan Chen,Jiaming Fan,Kefeng Liu,Junchao Li,Qixiu Dong,Guihua Yang
Traditional oil/water separation materials are greatly limited by poor eco-friendly, high energy consumption, and tedious preparation process. To address these issues, a sustainable superhydrophobic paper-based material (PDMS-CP@γ-CD-MOF) was developed through synergistic modification of cellulose paper sourced from wheat straw. A rough structure on the superhydrophobic paper was created by in-situ growth of γ-cyclodextrin metal-organic framework (γ-CD-MOF), and the surface energy was controlled via polydimethylsiloxane (PDMS) coating. The resulting superhydrophobic paper displayed appropriate mechanical strength, excellent superhydrophobicity and self-cleaning ability. Notably, gravity-driven separation of various oil/water mixtures was achieved with efficiencies over 97 % and flux rates reaching up to 382–603 L·m⁻²·h⁻¹ . Moreover, the superhydrophobic paper demonstrated excellent reusability, maintaining a separation efficiency above 98 % after 10 cycles, which indicates promising potential for treating oily industrial wastewater.
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JOURNAL OF CONTAMINANT HYDROLOGY
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2025
·
IF 4.4
Ting Liu,Mengting Xiao,Rongshan Du,Meng Li,Xinyi Li,Ying Xi,Yuanfei Lv,Honglin Liu,Yingping Huang,Tao Xu
Periphytic biofilms (PBs) and dissolved organic matter (DOM) are key factors affecting the migration of Cd at the “water-sediment” interface. However, the specific effects of PBs and protein-like components of DOM on Cd migration within the “water-biofilm-sediment” system remain poorly understood. This study simulates the dissolution and re-immobilization of Cd at the “water-biofilm-sediment” interface in the water-level fluctuation zone (WLFZ) of the Three Gorges Reservoir (TGR), aiming to clarify the role of PBs in Cd stability. The results indicate that the concentration of dissolved Cd increased by 0.96-fold (R 2 = 0.992) with each doubling of L-tryptophan (L-Trp) concentration, as the functional groups of L-Trp ( COOH and NH) formed complexes with Fe-Mn oxide-bound Cd in the sediment. In the presence of PBs and at an L-Trp concentration of 150 mg·L −1 , PBs utilized L-Trp, resulting in a 16.7 % reduction in dissolved organic carbon (DOC) ( p < 0.05) and an increase in protein content. Additionally, PBs contributed to a 35.12 % reduction in the peak concentration of dissolved Cd, thereby stabilizing the final Cd levels. Cd enrichment within PBs, facilitated by functional groups such as >C C<, OH, >C O, and C O , led to a significant increase in Cd content (0.43 mg·kg −1 , p < 0.05). These findings suggest that L-Trp degradation and Cd enrichment by PBs act synergistically to promote the re-immobilization of dissolved Cd. This study offers a novel perspective on Cd migration in WLFZs and provides insights that may be applicable to other aquatic environments where PBs are present.
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CLEAN-Soil Air Water
·
2026
·Vol. 54
·期 1
·e70109
·
IF 1.4
Yun Xing,Xiangfei Zhang,Yuqi Zhou,Jingjing Guo,Yuan Huang,Xiaohan Xu,Jiankun Li,Dingyu Wang
The disposal of spent coffee grounds (SCG) not only represents a significant waste of resources but also poses environmental challenges, highlighting the need for effective pretreatment strategies to mitigate potential adverse effects. Incorporating metal oxides into biomass-based adsorbents can enhance their adsorption capacity for heavy metal ions by enhancing electrostatic attraction and increasing the number of accessible active sites. In this study, KMnO 4 -modified spent coffee grounds (KMnO 4 -SCGS) were successfully synthesized and applied for the removal of Cd(II) from aqueous solution. Key process parameters, including contact time, pH, initial Cd(II) concentration, temperature, and adsorbent dosage, were systematically investigated. Characterization using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and x-ray photoelectron spectroscopy (XPS) confirmed that KMnO 4 treatment increased the abundance of oxygen-containing functional groups and promoted the deposition of manganese oxides (MnO x ) on the adsorbent surface. The adsorption isotherm followed the Langmuir model, and the kinetics were well fitted by the pseudo-second-order model. The maximum Langmuir adsorption capacity of KMnO 4 -SCGS for Cd(II) was determined to be 49.54 mg/g at pH 5.0, and 298 K. Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic. The enhanced Cd(II) uptake was primarily attributed to the synergistic effect of MnO x and oxygen-containing functional groups, which facilitated the formation of surface complexes. In conclusion, KMnO 4 modification represents an effective strategy for developing high-performance adsorbents for Cd(II) removal.
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Surfaces and Interfaces
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2026
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IF 6
Jiajun Zuo,Jingjing Gou,Haijia Zuo,Haoqian Wang,Mahe Li,Nong Wang
With the continuous advancement of global industrialization, oil-water separation materials that combine efficient separation and resource recovery have become an urgent issue in the fields of environmental science and engineering in crude oil extraction, oil-containing industrial production and wastewater discharge. To address the limitations of current separation membranes, such as susceptibility to damage and inadequate durability during operation, this study reports the synthesis of a self-healing organogel based on β-cyclodextrin dimers and dynamic phenylboronate ester bonds. This material was coated onto a nonwoven fabric substrate via a dip-coating and photo-polymerization process, yielding a self-healing oil-water separation mesh (SHSM) exhibiting superoleophilicity and underoil superhydrophobicity. The structural characteristics of the SHSM and its surface coating were characterized using scanning electron microscopy (SEM), proton nuclear magnetic resonance spectroscopy ( 1 H NMR) and Fourier-transform infrared spectroscopy (FTIR), the separation performance and self-healing capability of SHSM were systematically evaluated. Experimental results demonstrate that the SHSM achieves separation efficiencies exceeding 99.5% for various oil-water mixtures, with an oil flux reaching 4.30×10⁴ L·m⁻²·h⁻¹. Even after mechanical damage or repeated use, the SHSM can restore its structural integrity and functional performance through the reformation of dynamic boronate ester bonds, thereby significantly extending its service life. This research offers a novel strategy for the development of highly efficient and durable oil-water separation materials. Download: Download high-res image (232KB) Download: Download full-size image A β-cyclodextrin dimer coating enables self-healing, superoleophilic, underoil superhydrophobic non-woven fabric for oil-water separation.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Qiawen Zhang,Wensheng Qi,Dapeng Liu,Ganwei Zhang,Shusu Shen,Yaoliang Hong
To improve the permeability-selectivity balance in polyamide nanofiltration membranes, a dual-charged composite membrane (PES-CS/SBE-β-CD-PA) was fabricated via interfacial polymerization on a self-assembled CS/SBE-β-CD interlayer designed to regulate the interfacial availability and transport of PEI monomers during polyamide formation, yielding a selective layer with a lower apparent cross-sectional thickness (approximately 173 nm) and more uniform morphology. The negative potential of the interlayer-terminated surface before IP (−9.8 mV), the positive potential of the final PA surface (15.63 mV), and the sequential fabrication process support the designed negative-interlayer/positive-PA configuration. The optimized membrane exhibits a molecular weight cut-off of 445 Da, an average pore size of 0.51 nm, and MgCl 2 and MgSO 4 rejections of 94.00% and 91.34%, respectively, while maintaining a water permeance of 15.20 L m −2 ·h −1 ·bar −1 . The morphology, pore-size, and charge results support a separation mechanism combining steric/hydration effects with charge-dependent Donnan partitioning. In addition, the membrane shows improved antifouling properties and stable separation performance during 72 h continuous filtration under the tested conditions. This work presents an effective interfacial-regulation strategy for constructing nanofiltration membranes with balanced separation and antifouling performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Qing Nie,Yu Sun,Dongxu Xue,Jianwei Fan,Wei-xian Zhang
The coexistence of oxyanion-type and cationic heavy metals in complex aqueous systems poses a significant challenge for adsorption-based remediation. Herein, mesoporous silica-supported manganese‑lanthanum mixed oxides (Mn x La 1-x @MCM-41) were synthesized via an oxidation-coprecipitation strategy. The mesoporous silica framework effectively confined amorphous Mn/La oxides, suppressing oxide aggregation and manganese leaching. The as-prepared Mn x La 1-x @MCM-41 materials exhibited efficient removal of heavy metals, with maximum adsorption capacities of 57.3 mg g −1 for As(V), 141.6 mg g −1 for Cd(II), and 333.0 mg g −1 for Pb(II). By adjusting the Mn/La molar ratio, the adsorption behavior toward different metal species could be systematically regulated, with La-enriched compositions favoring As(V) uptake and Mn-rich materials exhibiting enhanced affinity toward Cd(II) and Pb(II). High removal efficiencies for all three heavy metals were maintained under multicomponent coexisting conditions. The composition-dependent adsorption behavior reflects a functional differentiation of Mn- and La-associated surface sites, enabling the simultaneous immobilization of oxyanion and cationic contaminants. Overall, this work demonstrates that integrating mesoporous confinement with compositional regulation provides an effective strategy for constructing stable and multifunctional adsorbents for multicomponent heavy-metal remediation.
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Laser & Photonics Reviews
·
2026
·
IF 9.7
Jie Hou,Bin Yang,Jun Chen,Huan Yang,Junsheng Chen,Jianyong Liu
Mn 2+ -doped nanomaterials are attractive for optoelectronic applications due to their characteristic dopant emission enabled by host-to-dopant energy transfer (ET). However, increasing Mn 2+ concentrations typically leads to severe photoluminescence (PL) quenching due to strong Mn 2+ -Mn 2+ interactions and the formation of nonradiative trap states. Here, we demonstrate that this challenge can be overcome in Cd-based perovskite nanocrystals (NCs) by exploiting localized excitons (LEs) coupled to a fast thermodynamic equilibrium with trap states. Ultrafast transient absorption spectroscopy suggests a rapid LE-trap equilibrium (∼100 ps) at room temperature. Mn 2 + doping further enhances exciton localization and redistributes the exciton population into trap states, which serve as intermediates for Dexter-type energy transfer, accelerating Mn 2 + excitation by over an order of magnitude compared to direct energy transfer from LEs. Consequently, efficient and thermally stable Mn 2+ emission is achieved at elevated dopant concentrations. The PL quantum yield exceeds that of the undoped NCs by more than 12-fold and retains 70% of its maximum value even at 20% Mn 2+ concentration in Cs 2 CdCl 4 :Mn 2+ NCs.
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TALANTA
·
2026
·
IF 6.7
Danrong Chen,Wenbo Lan,Yu Yin,Wanwan Li,Yaolin Dong,Hao Liang,Deshuai Zhen,Jinquan Liu,Fubing Xiao,Shengyuan Yang
Given the environmental and potential health hazards associated with uranyl ion (UO 2 2+ ), developing fast, cost-effective, and sensitive detection methods is of significant importance. In this study, we report a novel fluorescent sensor for the selective detection of UO 2 2+ based on a cadmium-post-modified hydrogen-bonded organic framework (HOF), H 4 -CDI-Cd. The post-synthetic metal modification enhances the π-conjugation of the framework, reduces its energy gap, and creates specific binding sites for UO 2 2+ . The probe exhibits a fast, selective response toward UO 2 2+ via a photoinduced electron transfer (PET) mechanism, achieving a low detection limit of 19.54 nM and a linear range from 75 nM to 1 μM. DFT calculations reveal that Cd 2+ coordination redistributes charge, which not only lowers the electrostatic repulsion for UO 2 2+ migration into the channels but also provides low-energy vacant orbitals (5s/5p) for secondary coordination with UO 2 2+ , thereby enhancing selective binding. The method was successfully applied to determine UO 2 2+ in real water samples (lake water and mining wastewater), with quantitative spike recoveries between 99.61% and 102.61%. This work demonstrates a feasible post-modification strategy to engineer responsive HOFs for the selective detection of UO 2 2+ in the environmental water.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Zhou Li,Deming Dong,Xiaoyu Yang,Jun Qian,Mengruizhe Kong,Han Wan,Ni Ma,Wei Bai,Pengfei Nan,Binghui Ge,Jiming Song,G. Jeffrey Snyder,Yuan Yu
Grain boundary (GB) scattering of charge carriers plays an important role in the electrical properties of materials. For thermoelectrics, this scattering can significantly reduce the carrier mobility and output power. Various GB engineering strategies, such as increasing the grain size and decreasing the GB potential barrier height, have been demonstrated in n-type Mg 3 Sb 2 -based thermoelectrics. Yet, similar effects in p-type Mg 3 Sb 2 have been less reported, and effective methods to modify the GB potential are elusive. Here, we reveal that Cd can reduce the GB barrier height via segregation to the GB. The enrichment of Cd suppresses the formation of hole-killer defects (Sb Mg + ) and thus reduces the GB resistance, leading to significant improvements in the electrical conductivity and power factor. A two-phase model shows a progressive decrease in the GB barrier height with increasing Cd content. Simultaneously, the GB Cd segregation and grain-interior Cd alloying strengthen the phonon scattering and reduce the sound velocity, substantially reducing the thermal conductivity. Consequently, a maximum ZT of 0.84 is achieved in Mg 2.5 Cd 0.5 Sb 2– 1 at% NaF at 773 K. These findings unravel the hidden role of Cd in tuning the GB characteristics and the transport properties of Mg 3 Sb 2 , revisiting the functionality of conventional dopants in materials design.
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