Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Guangyu Dong,Liushan Jiang,Linchun Nie,Jiawei Liao,Xiaodie Geng,Wenjing Liu,Dejing Meng,Meiling Xu,Na Liu,Qingxiang Zhou,Chunmao Chen
In this study, a magnetic covalent organic framework composite (Fe 3 O 4 @COF-BTCA-TMB) was conceived and synthesized with benzene-1,3,5-tricarbaldehyde and 3,3’,5,5’-tetramethyl benzidine as monomers. The modification of COF endowed the magnetic composite with a large number of functional groups and benzene rings, which exhibited high affinity to polycyclic aromatic hydrocarbons (PAHs) attributed to π-π conjugation and hydrophobic interaction. Based on these properties, it was utilized to conceive a highly efficient magnetic solid phase extraction method to enrich PAHs from water samples prior to high performance liquid chromatography analysis. The key factors that affect the extraction efficiencies of six PAHs in water samples were explored. Under the optimized conditions, six PAHs obtained good linearity in wide concentration ranges of 0.2–80 μg L −1 , 0.2–180 μg L −1 , and 0.2–240 μg L −1 , respectively. The limits of detection (LODs) ranged from 0.03 to 0.09 μg L −1 , and the enrichment factors were in the range of 107–149. The adsorption of PAHs on Fe 3 O 4 @COF was consistent with the quasi-second-order kinetic model, and Freundlich adsorption isotherm model. The conceived method was evaluated with real water samples and satisfactory recoveries (73.8 % ∼ 100.5 %) were obtained, indicating that it was simple, robust and efficient, and could be optioned for monitoring trace PAHs in environment.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-11
·
IF 5.3
Li Xinyi,Fan Yaofang,Gong Hao,Wang Haoran,Ji Yanli,Xu Longqiang,Ma Cuiping,Shi Chao
A signal amplification electrochemical biosensor chip was developed to integrate loop-mediated isothermal amplification (LAMP) based on in situ nucleic acid amplification and methyl blue (MB) serving as the hybridization redox indicator for sensitive and selective foodborne pathogen detection without a washing step. The electrochemical biosensor chip was designed by a screen-printed carbon electrode modified with gold nanoparticles (Au NPs) and covered with polydimethylsiloxane membrane to form a microcell. The primers of the target were immobilized on the Au NPs by covalent attachment for in situ amplification. The electroactive MB was used as the electrochemical signal reporter and embedded into the double-stranded DNA (dsDNA) amplicons generated by LAMP. Differential pulse voltammetry was introduced to survey the dsDNA hybridization with MB, which differentiates the specifically electrode-unbound and -bound labels without a washing step. Pyrene as the back-filling agent can further improve response signaling by reducing non-specific adsorption. This method is operationally simple, specific, and effective. The biosensor showed a detection linear range of 10 2 –10 7 CFU mL −1 with the limit of detection of 17.7 CFU mL −1 within 40 min. This method showed promise for on-site testing of foodborne pathogens and could be integrated into an all-in-one device. Graphical Abstract
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Toxics
·
2024
·Vol. 12
·期 11
·796
·
IF 3.9
Xintong Li,Baocheng Qu,Jingyao Wang,Hongxia Zhao
Environmentally persistent free radicals (EPFRs) generated on particles under irradiation in water have attracted particular attention, and their formation mechanisms are not well understood. This study investigated the photoformation of EPFRs on both actual samples collected from an oil production plant in Panjin, Liaoning, China, and simulated Fe(III)-montmorillonite samples in water. The EPFRs detected on actual samples were not easily generated compared with those in the soil or in the air, based on the concentrations of identified PAHs. EPR signals in the range of 1017to 1018spin/g were detected on the simulated Fe(III)-montmorillonite samples. Their g factors were smaller than 2.0030, which indicated the generation of carbon-centered EPFRs. The primary byproducts were identified by chromatography–mass spectrometry (GC-MS), and a possible EPFR formation pathway during PAH degradation was proposed. Hydrogenation of PAHs during the photoformation of EPFRs was observed and might be due to the catalysis of the simulated particles and the interaction of the intermediates. Meanwhile, the effects of the typical anions (NO2−and Cl−) and the surfactant (TWEEN®80 and sodium dodecyl sulfate) were investigated and indicated that the phototransformation process and adsorption process would affect the formation of EPFRs. Overall, our study provided useful information to understand the photoformation of EPFRs in aqueous environments.
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FOOD HYDROCOLLOIDS
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2024
·
IF 11
Lingyu Han,Ruiyi Zhai,Bing Hu,Peter A. Williams,Jixin Yang,Cunzhi Zhang,Nuo Dong,Tingting Li
Micelles are nano-architectured structures capable of encapsulating hydrophobic substances in aqueous solutions, thereby improving their stability, solubility, and bioavailability to control the release of bioactive compounds. In this study, the sodium alginate backbone was modified via a hydrophobic modification scheme where octyl chains were covalently attached to the alginate chains via esterification reactions. Fourier-transformed infrared spectrometry (FTIR), 1 H nuclear magnetic resonance ( 1 H NMR), X-ray diffraction (XRD), and thermal gravimetric analysis (TGA) were used to characterize the structure of the sodium alginate derivatives of varying molar mass (ALG-C8). Fluorescence spectroscopy, surface tension measurements, and dynamic light scattering (DLS) were employed to assess the self-assembly performance of ALG-C8. The three methods produced consistent results, indicating that self-assembly decreased with higher molar mass. The self-assembled ALG-C8 micelles were utilized to encapsulate fucoxanthin. The loading capacity (LC) and encapsulation efficiency (EE) were determined using UV–Vis spectrophotometry. The molar mass of ALG-C8 has a key influence on fucoxanthin loading and release behavior. The ALG-C8 molecules with the lowest molar mass produced micelles with the smallest hydration diameter, resulting in the highest LC and EE. Furthermore, the release of fucoxanthin is significantly influenced by the pH and ionic strength of the medium. ALG-C8 micellar-like aggregates exhibit resistance to low pH and high ionic strength environments, releasing encapsulated material at the target site under alkaline conditions. Therefore, synthesized ALG-C8 is a potential candidate for preparing pH-responsive self-assembled micellar-like aggregates, enabling targeted delivery and gradual release of hydrophobic functional food components.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Zhuo Chen,Zhiyang Lu,Weijun Tian,Bingkun Liu,Bingjie Huo,Jing Zhao,Mengyuan Zou,Ruijuan Zhang,Xinran Yu,Xinbo Wang
Pyrene (Pyr) and its derivatives are classified as Persistent Organic Pollutants (POPs), which exhibit significant toxicological effects and pose serious threats to ecosystems. Photocatalytic technology is increasingly employed for the remediation of POPs due to its effective and environmentally sustainable degradation capabilities. However, conventional photocatalytic materials, primarily in powder form, face challenges related to separation and recovery from aqueous environments, significantly limiting their practical application. In this study, we successfully synthesized a three-dimensional (3D) porous immobilized photocatalytic material by decorating Ag 3 PO 4 and BiOBr onto Ni foam (NF) using a hydrothermal method combined with continuous ionic layer adsorption. The results demonstrated Ag 3 PO 4 /BiOBr/NF exceptional light degradation capabilities, achieving over 90 % degradation of Pyr, 1-methylpyrene, and 1-hydroxypyrene, as well as over 40 % degradation of 1-nitropyrene under visible light irradiation over a duration of 5 h. Its degradation efficiency decreased by 12.49 % after five cycles, demonstrating its reusability. The roles of superoxide radicals ( O 2 – ) and holes (h + ) were critical in the degradation process. Furthermore, based on experimental findings, we proposed a Z-type heterojunction degradation mechanism for the Ag 3 PO 4 /BiOBr/NF composite, accompanied by an analysis of the potential degradation pathways for Pyr. Consequently, the recyclable immobilized photocatalytic materials developed in this research contribute novel insights into the photocatalytic degradation of POPs.
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PEDOSPHERE
·
2024
·
IF 5.2
Xiaonuo ZHANG,Yaxi DENG,Goujian CHI,Hong LÜ,Hongxia ZHAO
ABSTRACT Rhizoremediation has emerged as a burgeoning approach for the removal of petroleum hydrocarbons (PHCs) from soil, with a primary emphasis on terrestrial plant systems. However, the mechanism on how soil microbiomes influence the dissipation of PHCs within a hygrophyte planting system has yet to be fully elucidated. This work concentrated on investigating the potential evolution of soil microbiomes and their effect on the PHCs dissipation within the Suaeda salsa (L.) Pall. planting system using the pot experiment. Two representative compounds, namely polycyclic aromatic hydrocarbons (PAHs) and n-alkanes, were used as target PHCs. The findings revealed a significant efficiency in the dissipation of petroleum hydrocarbons (PHCs) in soil, particularly with respect to n-alkanes. The high dissipation efficiency of PHCs was the synergistic result of both the root accumulation and the microbial biodegradation. The key microbes involved in PHCs dissipation were revealed, with the dominant phylum of Protobacteria and genus of Salinimicrobium . The alterations in microbial diversity and abundance were closely associated with the root exudation and PHCs exposure. Significant differences in enzyme activity, which serves as an indicator of soil health and fertility, were observed between the rhizospheric and non-rhizospheric soil, attributed to root exudation. This study offers novel insights into the phytoremediation potential for Suaeda in PHC-contaminated soil and serves as a valuable scientific reference for the phytoremediation of such soils.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-12
·
IF 5.3
Liu Keao,Liu Fengshan,Xu Yang
A kind of sulfur-doped carbon dots was prepared which were encapsulated with polydopamine (S-CDs@PDA) that has fluorescence response on polyethylene (PE) microplastics (MPs). Modified membranes were constructed using S-CDs@PDA for MP detection. Through heating and vacuum filtration process, yellow emission from the modified membrane appeared because of the combination between S-CDs@PDA and PE MPs. Notably, the fluorescence signal value of PE MPs detected by S-CDs@PDA-modified membrane was 21.3% higher than that of unmodified S-CDs membrane, and the detection efficiency was 8% higher than that of S-CDs membrane. The minimum detection limit for modified membranes was 4 mg. Due to the good adhesion of polydopamine (PDA), S-CDs@PDA-modified membrane was more easily adhered to PE MPs, showing its excellent detection ability. The rapid quantitative detection of PE MPs in 10 min was realized with a linear equation of y = 3081 x + 3686.1 in a linear range of 4–14 mg. Such modified membrane exhibited excellent anti-photobleaching using continuous 365-nm excitation and its sensing performance was further confirmed in sea and river water samples. S-CDs@PDA could detect solid MP powders as well as MPs dispersed in liquids. The detection method constructed with a modified glass fiber filter membrane enables rapid identification and quantitative detection of PE MPs without relying on large-scale instrumentation. This study provided research ideas for fluorescent tracing of PE MPs and paved the way for quantitative detection of micron-sized plastics with smaller particle sizes. Graphical abstract
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zhixia Gong,Tiaozhen Yu,Zhi Cai,Ying Yi,Jingli Zhang,Weiquan Cai,Yihua Yin,Guanghua He,Yaqi Xiao,Peiyu Xu,Huiyi Wu,Sihui Lin
Photoactivated pesticides with high activity, environmental friendliness, and no drug resistance represent the direction of pesticide development. However, poor photostability and lack of targeting ability greatly restrict their practical application. Herein, a novel amphiphilic photoactivated polymeric propesticide was synthesized by conjugation of mPEG with the photo/enzyme-labile o-nitrobenzyl ester group followed by grafting protoporphyrin IX (PpIX), which could self-assemble into photo/esterase responsive polymer micelles in aqueous solutions for a controlled release of PpIX. The fluorescence quenching caused by the aggregation of PpIX into hydrophobic core could enhance its photostability. UV/esterase stimulation could trigger the release of PpIX and restore its photodynamic activity. Compared to a single stimulus, dual stimulation could trigger more PpIX release and resulting in higher photodynamic activity and antibacterial effect. In addition, light exposure also showed little influence on the photodynamic activity and antibacterial effect of the system due to enhanced photostability. Compared with PpIX, the nanosystem exhibited higher wettability and retention ability on plant leaves and could resist rainwater washout. Weed control experiment also demonstrated that the system’s control effect on barnyard grass. Therefore, this study provides new ideas for promoting the application of photoactivated pesticides in the field of plant protection.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Rong Chen,Xiangrong Dai,Rongjiao Sun,Yi Liao,Jiajia Dong,Ying Tan,Xuru Jin
Acute Lung Injury (ALI) is a clinical syndrome associated with various respiratory diseases and injuries. While inhalable drug delivery systems offer the advantage of direct pulmonary targeting and reduced systemic toxicity, their therapeutic efficacy is frequently compromised by the tracheobronchial mucus barrier. To address this limitation, we developed PCL-ss-PSBMA, a novel nanocarrier engineered to overcome the constraints of conventional micelle platforms, which typically depend on either hydrophilic coatings or single-response mechanisms. By integrating zwitterionic groups and disulfide bonds in a dual-functional design, PCL-ss-PSBMA achieves synergistic optimization of mucus barrier penetration and glutathione (GSH)-triggered drug release. In addition, the nanocarrier also exhibits excellent biocompatibility, further ensuring its safety in therapeutic applications. In an ALI murine model, PCL-ss-PSBMA@DEX markedly improved the delivery efficiency and utilization rate of dexamethasone (DEX) through its dual mechanisms of mucus penetration and stimulus-responsive drug release. This design not only enhances the deposition of the drug in the lungs but also achieves efficient treatment of ALI by precisely controlling drug release, demonstrating its potential as an advanced strategy for treating respiratory diseases.
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Polymers
·
2024
·Vol. 16
·期 5
·679
·
IF 4.7
Peng Li,Lei Wang,Xiaojuan Lai,Jinhao Gao,Zhiqiang Dang,Rong Wang,Fan Mao,Yemin Li,Guangliang Jia
Two acid thickeners, ADMC and ADOM, were prepared by aqueous solution polymerization using acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (DMC) as raw materials, with or without the introduction of octadecyl polyoxyethylene ether methacrylate (OEMA). It was characterized by FTIR,1H NMR, and the fluorescence spectra of pyrene. The double-layer thickening mechanism of ADOM was proved by comparing the thickening and rheological properties of ADMC and ADOM tested by a six-speed rotary viscometer and a HAKKE MARSIV rheometer during the acidification process. The results showed that the synthetic product was the target product; the first stage of the self-thickening ADOM fresh acid solution during high-temperature acidification was mainly affected by Ca2+concentration, and the second stage of self-thickening was mainly affected by temperature. The residual viscosity of the 0.8 wt% ADOM residual acid solution was 250, 201.5, and 61.3 mPa·s, respectively, after shearing at 90, 120, and 150 °C for 60 min at a shear rate of 170 s−1. The thickening acid ADOM with a hydrophobic association structure has good temperature resistance and shear resistance, which can be used for high-temperature deep-well acid fracturing. In addition, no metal crosslinking agent was introduced in the system to avoid damage to its formation, and ADOM exhibited good resistance to Ca2+, which could provide ideas for the reinjection of the acidizing flowback fluid. It also has certain advantages for environmental protection.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Chu Fengjian,Zhao Gaosheng,Wei Wei,Shuaibu Nazifi Sani,Feng Hongru,Pan Yuanjiang,Wang Xiaozhi
Although numerous ambient ionization mass spectroscopy technologies have been developed over the past 20 years to address diverse analytical circumstances, a single-ion source technique that can handle all analyte types is still lacking. Here, a wide-energy programmable microwave plasma-ionization mass spectrometry (WPMPI-MS) system is presented, through which MS analysis can achieve high coverage of substances with various characteristics by digitally regulating the microwave energy. In addition, ionization energy can be rapidly scanned using programmable waveforms, enabling the simultaneous detection of biomolecules, heavy metals, non-polar molecules, etc., in seconds. WPMPI-MS performs well in analyzing real samples, rapidly analyzing nine toxicological standards in one drop of serum, and demonstrating good quantification and liquid chromatography coupling capability. The WPMPI-MS has also been used to detect soil extracts, solid pharmaceuticals, and landfill leachate, further demonstrating its robust analytical capabilities for real samples. The prospective uses of the technology in biological and chemical analysis are extensive, and it is anticipated to emerge as a viable alternative to commercially available ion sources.
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Small
·
2025
·
IF 12.1
Xu Wang,Yong Yan,Huan Zhou,Xinyu Liu,Riyi Zhang,Dong Wang,Peter Schaaf,Guangsheng Guo,Xiayan Wang
Polycyclic aromatic hydrocarbons (PAHs) and organophosphorus pesticides (OPPs) are typical pollutants characterized by a wide variety of types, difficulty in degradation, and significant differences in mutagenic and carcinogenic toxicity. However, due to their distinct physicochemical properties, it remains challenging to simultaneously analyze PAHs and OPPs under real environmental conditions within the same simplified detection systems and accurately assess their oxidation-reduction processes. In this study, electrochemical surface-enhanced Raman scattering (EC-SERS), utilizing a microfluidic chip of self-made 3D nanoporous Au loaded with Ag nanoparticles, is employed to analyze PAHs and OPPs in the environment and investigate their oxidation-reduction processes, which displayed excellent sensitivity and selectivity. The chip successfully analyzed three types of PAHs and four types of OPPs, achieving the lowest detection limit of 0.01 ppb, and strong linearity within a certain range. The recovery in real water samples reached 102.89% with a relative standard deviation (RSD) of 13.36%. Furthermore, this system successfully identified different types of pollutants and their concentrations in mixed samples with high accuracy. Meanwhile, preliminary insights into the electrochemical oxidation and degradation processes of these pollutants are provided, offering a first understanding of their transformation mechanisms.
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