Environmental Science-Processes & Impacts
·
2024
·Vol. 26
·期 3
·499-509
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IF 4.3
Mingyang Sun,Han Liu,Feixiang Liu,Hong Yang,Guanghuan Cheng
Black carbon (BC) exhibits promising potential as a sediment amendment owing to its commendable adsorption capacity for hydrophobic organic contaminants (HOCs), thereby resulting in HOC-laden sediments. Desorption kinetic studies play a crucial role in comprehending the release potential of HOCs from BC-sediment systems. Although the adsorption capacity of BC for HOCs has been found to decrease with aging, there is limited research on its impact on HOC desorption kinetics. In this study, BCs derived from agricultural waste (rice straw carbon, RC) and industrial waste (fly ash carbon, FC), respectively, were used to investigate the desorption kinetics of nonylphenol (NP). Additionally, a predictive model was established using the fitting parameters obtained from the modified two-domain model. The results showed that desorption of NP was divided into three fractions: rapid fraction (Frap), slow fraction (Fslow) and resistant fraction (Fr). BCs significantly decreased, while ageing increased the desorption amount and rate of NP. The performance of RC in controlling NP release was superior to that of FC. The predicted values calculated by the established model exhibit significant positive correlations with the measured values (p < 0.01). Additionally, the correlation analysis between sorption sites and desorption fractions revealed that the concentration of NP in the desorbing fraction was nearly equivalent to that of NP in partition sites within aged sediment/FC-sediment systems. However, the aged RC-sediment systems do not conform well to this rule. In other words, the estimation of NP release risk from sediments with a strong adsorbent would be overestimated, if Frap + Fsolw is considered equivalent to the desorbing fraction.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Xin Zhang,Shuyan Miao,Jing Zhou,Tingting Zhou,Tian Gan,Yong Tang
We present a disposable paper-based molecularly imprinted electrochemical sensor for highly sensitive and selective monitoring of phenolic pollutants. The sensor features a fully integrated three-electrode array fabricated through an eco-friendly vacuum filtration method, which utilizes single-walled carbon nanotube-based substrates to provide excellent conductivity, large surface area, and low-cost electrode platforms. These substrates enable effective deposition of hollow-structured zeolitic imidazolate framework-8-derived N-doped carbon polyhedrons supporting Pt single-atom catalysts (Pt-N-C) synthesized via high-temperature calcination. Subsequent electropolymerization of a molecularly imprinted polymer (MIP) on the electrode surface was achieved using 3,4-ethylenedioxythiophene and pyrrole as dual functional monomers. Comprehensive characterization demonstrates that the Pt-N-C architecture exhibits abundant atomic Pt catalytic sites, nitrogen-decorated hierarchical porosity, and maximized electrochemical accessibility, collectively contributing to exceptional detection sensitivity for multiple phenolic compounds including 2-chloro-4-methoxyphenol, 4-bromo-2-methoxyphenol, 4-aminophenol, and 4-nitrophenol. Concurrently, the MIP layer demonstrates rapid binding kinetics and high molecular recognition capacity, significantly enhancing selective identification capabilities. The developed sensor successfully achieves direct quantification of these phenolic contaminants in unprocessed complex wastewater samples without requiring pretreatment procedures.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shukai Zhang,Linghui Cao,Aijuan Xie,Shiping Luo
4-Nitrophenol (4-NP), a hazardous chemical compound, presents significant risks to ecological balance, public well-being, and the integrity of the food supply chain. Consequently, the development of detection techniques characterized by both efficiency and precision is of utmost importance. In the present work, ZnCo(OH)F/multi-walled carbon nanotubes (MWCNTs) composite was synthesized through a hydrothermal approach, followed by a high-temperature annealing process to transform them into ZnCo 2 O 4 /MWCNTs tailored for electrochemical sensing of 4-NP. The integration of MWCNTs during the fabrication process induced a pronounced synergistic interaction between ZnCo 2 O 4 and MWCNTs, leading to a substantial enhancement in the electrochemical performance of the composite. The ZnCo 2 O 4 /MWCNTs-based sensors exhibit notable benefits, including an expanded electrochemically active surface area, superior electrical conductivity, and exceptional selectivity. Under optimized experimental parameters (S/N = 3), the sensor exhibited a broad linear detection range (0.5–600 μM), coupled with a lower limit of detection of 0.026 μM. When used on real samples, the sensor showed recovery rates of 98.79 %–100.47 %, indicating its feasibility for practical use in environmental monitoring and food safety evaluation.
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ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
·
2024
·
IF 4.2
Fangfang Ding,Huimei Wang,Yingzhi Li,Xueping Leng,Jiaming Gao,Danfei Huang
Due to the massive production and use of plastic, the chronic and evolving exposure to microplastics in our daily lives is omnipresent. Nonylphenol (NP), a persistent organic pollutant, may change toxicity when it co-exists with microplastics. In this study, polystyrene microplastics (PS-MPs), either alone or with pre-absorbed NP, generated oxidative stress and inflammatory lesions to Caco-2 cells, as well as affecting proliferation via the MAPK signaling pathway and causing apoptosis. Damage to cell membrane integrity and intestinal barrier (marked by lower transepithelial electric resistance, greater bypass transport, and tight junction structural changes) leads to enhanced internalization risk of PS-MPs. Some important intestinal functions including nutrient absorption and xenobiotic protection were also harmed. It is worth noting that the exposure of PS-MPs with a diameter of 0.1 μm improved intestinal functions quickly but acted as a chemosensitizer for a long time, inhibiting cell perception of other toxic substances and making the cells more vulnerable.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Dong Zhang,Ping Yan,Hong Yu,Jing Sun,Shuyun Zhu,Xian-En Zhao
Development of accurate, convenient and portable methods for monitoring 4-aminophenol (4-AP) is extremely important because of its strong toxicity. Here, a ratiometric fluorescence sensor based on Ag + -enhanced luminescence of Tb-DNA complexes has been presented for the detection of 4-AP. The luminescence of Tb-DNA complexes is enhanced about 30 times by Ag + , which can trigger energy transfer from DNA to Tb 3+ more efficiently. In the presence of 4-AP, Ag + can be reduced into Ag 0 owing to its strong reducibility, inducing the decrease of Tb-DNA complexes at 545 nm remarkably. Besides, 4-AP exhibits intrinsic fluorescence at 375 nm under the same conditions. Therefore, ratiometric detection of 4-AP can be achieved using F 375 /F 545 as readout with a detection limit of 0.4 μM. Real water samples have been tsted to evaluate this method in practical application and satisfactory results have been obtained. Furthermore, the addition of 4-AP into Tb-DNA-Ag + system induces a visible color variation from green to bluish violet, enabling visual detection of 4-AP under the assistance of a smartphone.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kai Liu,Qikui Fan,Zhun Qiao,Zhixue Zhang,Yongzhao Zhang,Zhiqun Chen,Hao Ma,Zemin He,Zongcheng Miao,Jiaofei Huo,Duqiang Xin,Jianxin Guo,Chuanbo Gao
Plate-like metal nanomaterials have attracted much interest due to their anisotropy, high aspect ratio and large surface area. The synthesis of non-noble metal nanocrystals with high purity remains challenging due to the poor regulation mechanism of their seeds, which limits their property and application studies. This paper presents a selective etching mechanism that effectively facilitates the identification and dissolution of non-target seeds during the synthesis of Cu nanoplates. This innovative approach not only enables the production of highly pure nanoplates but also allows for the shape transformation of nanoparticles into nanoplates. The resulting Cu nanoplates exhibit tunable localized surface plasmon resonance (LSPR) characteristics and high enhanced performance in surface-enhanced Raman scattering (SERS). This method offers a novel approach to the synthesis and purification of metal nanocrystals.
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Catalysts
·
2025
·Vol. 15
·期 2
·175
·
IF 4
Wei Wang,Jiaqi Liu,Guang Shi,Shiqi Wu,Shihan Zhang,Ruixia Yuan
A magnetic shell-structured nano-catalyst was prepared by self-polymerization of dopamine wrapped by ferric oxide as the carrier, which was loaded with palladium nanoparticles (Pd/PDA@Fe3O4). The presence of magnetic Fe3O4made it easy for nanoscale palladium particles to recover and prevent the loss of palladium nanoparticles that is unavoidable in traditional usage and preparation procedures. The catalyst was characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, thermal weight loss analysis, Raman spectroscopy, X-ray photo-electron spectroscopy, and magnetic properties analysis. The catalytic performance of the prepared catalyst was investigated taking 4-nitrophenol (10 mg/L) and rhodamine B (15 mg/L) as the target pollutants. The results showed that under the conditions of 35 °C, pH = 7 and a catalyst dosage of 3 mg, the catalytic reduction efficiency of 4-nitrophenol, rhodamine B, and the mixture of them all can reach 99%. The catalytic efficiency of Pd/PDA@Fe3O4remained above 90% after being used 10 times. The shell structure of Fe3O4made it possible and easy to recover and recycle the nanoscale palladium, which was a real problem in the usage of nano-catalysts. At the same time, the problem of separation and recovery of palladium nano-catalyst is solved by magnetism, which provides research ideas for the recycling and utilization of nano-materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jie Ji,He Zhang,Feichao Zhang,Yao Wu,Han Zhang,Ziwei Mei,Wenxuan Zhou,Liang Li,Hong Tao,Meicheng Wen
The environmental and health impacts of nonylphenol (NP) have led to increased efforts in developing green and efficient treatment methods. This study prepared biochar (BC) from pine leaves and sludge at 300 °C and 400 °C, and added organic acid to regulate persistent free radicals (PFRs) for continuous reactive oxygen species (ROS) production to degrade NP. Low-temperature biochar contained more oxygen containing functional groups, enhancing redox reactions. Organic acid effectively regulated pH and provided electrons, promoting high-redox-potential ROS generation in the organic acid-biochar (OA-BC) PFRs system, significantly increasing NP degradation. Notably, 85.71 % of NP was removed using 0.2 g/L 300 °C sludge-derived biochar and 20 mM citric acid. Quenching experiments confirmed that hydroxyl radicals ( OH) played the most significant role in NP degradation. Electrochemical tests and DFT calculations showed that biochar-PFRs can mediate electron transfer from organic acid, maintaining stable ROS generation. This research offers valuable insights into ROS generation and a novel approach for NP degradation.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Cui Zhang,Jian Lu,Jun Wu,Bitao Xiong
This study presents the first comprehensive investigation on an easily neglected biogeochemical process of phenolic endocrine-disrupting chemical (EDC) capture and carbon sequestration by seagrass detritus. The results showed that Zostera marina L. detritus captured nonylphenol (NP) and bisphenol A (BPA) with high efficiency (>90%) and enhanced organic carbon sequestration in marine ecosystems. Under various seawater-sediment scenarios (pure seawater, nonburial, and burial systems), phenolic EDC rerelease rates were low (<20%), while total organic carbon (TOC) stocks increased by 21.5%–28.8% in EDC-treated groups compared to controls. Kinetic analyses revealed that NP and BPA were rapidly captured onto heterogeneous active sites of the detritus surface, with capture efficiency influenced by the physicochemical properties of contaminants, environmental factors, and the specific characteristics of the detritus. Laser scanning confocal microscopy (LSCM) and density functional theory (DFT) were employed to investigate synergistic mechanisms between phenolic EDCs and carbon at cellular and molecular levels. The lipids mediated NP sequestration through hydrophobic interactions with lipid-rich sites (such as phospholipids), while polysaccharides facilitated BPA binding via electrostatic interactions, highlighting their crucial roles in capturing phenolic EDCs. These findings reinforced the importance of seagrass meadows in capturing emerging contaminants and storing carbon in marine ecosystems.
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Advanced Science
·
2025
·
IF 14.1
Sisi Yao,Jiawei Han,Wenjun Zhang,Dengkang Guo,Shenjie Han,Yun Lu,Jingpeng Li
Developing efficient catalytic hydrogenation microreactors with minimal catalyst loading yet high active-site density for treating concentrated organic pollutants remains challenging. Herein, a facile room-temperature method is presented to stabilize Pd single-atom catalysts (SACs) within ZIF-67 crystals during their formation, aiming to fabricate an efficient, low-loading hydrogenation catalytic microreactor (Pd@Z-P/b CMR). ZIF-67 is constructed into polydopamine (PDA)-modified bamboo microchannels under flow conditions, utilizing preimmobilized Co 2+ seeds in PDA. Despite an ultralow Pd loading (0.0014 wt.%), the Pd@Z-P/b CMR featuring atomically dispersed Pd─N 4 sites in ZIF-67 considerably outperforms its Pd nanoparticle–loaded counterpart (Pd 0.0035 wt.%) in continuous-flow hydrogenation, demonstrating superior robustness and maximized Pd utilization with 94.3% conversion efficiency for saturated 4-nitroaniline over 10 d and 97.5% conversion efficiency for gram-level methylene blue (1.0 g L −1 ) over 5 d. Crucially, it exhibits consistent, high performance in real environmental water samples. The high surface area and porosity of ZIF-67 stabilize the Pd SACs, enhance dispersion, and ensure accessibility. Simultaneously, the Pd─N 4 configuration facilitates electron transfer and optimizes hydrogen binding energy, dramatically boosting the catalytic activity. This work provides a novel strategy for room-temperature SAC synthesis and the effective treatment of high-concentration organic pollutants for sustainable wastewater remediation.
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WATER RESEARCH
·
2025
·
IF 12.4
Linzhu Du,Wei Guo,Dongyue Li,Xuan Du,Zhuohao Li,Xin Zhang,Jun Li,Shouliang Huo,Yue Gao
Salinity fluctuations and dry-wet cycles caused by seawater incursion can reshape microbial communities and influence the fate of endocrine disrupting compounds (EDCs) in estuarine sediments. In this study, controlled water-sediment microcosms were established to investigate how salinity gradients under dry-wet cycles affect the transformation of two typical EDCs (bisphenol A (BPA) and nonylphenol (NP)) in sediments. The results indicate that biodegradation is the predominant pathway in the transformation process of the above substances. Compared to continuously submerged sediments, dry-wet cycles significantly shortened the half-life of BPA and NP ( p < 0.05), increased microbial diversity, and enriched various BPA- and NP-degrading bacteria with salinity preference, including Stutzerimonas, Sphingomonas, and Pusillimonas . As salinity increased, the half-life of BPA continuously decreased, whereas that of NP first decreased and then increased. At moderate salinity (10‰), the microbial transformation of both BPA and NP was enhanced. However, at high salinity (20‰), NP degradation by Stutzerimonas via the long-chain alkylcatechol pathways was inhibited. In contrast, BPA transformation was further enhanced through potential cross-feeding among Pusillimonas, Sphingomonas , and Stutzerimonas . This was attributed to the BPA transformation pathway shifts from 4-carboxy-2-hydroxymuconate semialdehyde to β-carboxy-muconate-mediated route, thereby enhancing resistance to salinity stress. These findings provide new insights into the contamination and control of in-situ EDCs in estuarine environments under salinity stress.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Hongjie Xu,Yi Yao,Yuelin Jin,Jiayu Zhan,Zheng Zhao,Shengli Qi,Guofeng Tian,Dezhen Wu
With the development of high-performance organic fiber reinforced composites, challenges related to fiber microstructural defects and surface inertness have attracted increasing attention. To address these issues, this study proposes effective and commercially viable strategies for restoring sub-microstructures and activating fiber surfaces. Through the synergistic effect of acetone and epoxy, the epoxy not only adsorbed onto and activated the fiber surface but also deeply penetrated into the fibers, thereby restoring the fibril-void structure. The multifunctional epoxy significantly improved the structural and interfacial strength, leading to significant improvements in the tensile and compressive strength of the monofilament, with increases of 15 % and 59 %, respectively. Upon preparation into a composite, the interfacial shear and compressive strength were enhanced by 75 % and 53 %, respectively. Furthermore, molecular dynamics simulations revealed that the interfacial enhancement mechanism is closely associated with the increased interfacial energy and thickness, as well as the enhanced reactivity of the epoxy.
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