JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Li Zhu,Yulong Ma,Yonggang Sun,Jing Ma,Song Qiao,Yifan Wu,Bolong Zhao,Lei Wang,Min Xu,Yuhua Wu,Wenxin Ji,Wenjie Ye
Coal gasification fine slag (CGFS) is a kind of solid waste with large output in the coal chemical industry, which contains rich aluminosilicate minerals and residual carbon. A magnetic composite (Fe-MCGFS-800) was prepared from CGFS via the mechanochemical method, enabling the migration and transformation of endogenous iron species within the system. The composite, with an effective active iron species content as high as 34 %, demonstrated excellent performance in the removal of bisphenol A (BPA) in the peroxymonosulfate (PMS) system. The Fe-MCGFS-800 could achieve a 93.1 % removal rate of BPA within 60 min, with a kinetic reaction rate of 0.0418 min −1 . Characterization results indicated that Fe-MCGFS-800 possessed a rich mesoporous structure, where aluminosilicate minerals and the carbon substrate were interlaced, providing a stable structure for the effective removal of BPA. The ketone group structure and abundant iron species in Fe-MCGFS-800 could activate PMS to generate reactive oxygen species (ROS), which played a dominant role in the BPA degradation process. Specifically, the bondage of iron species could be broken by the mechanochemical method, and this method promoted the phase transformation and the formation of active centers. Moreover, the migration of iron species enhanced the electron-transfer ability, promoting the degradation of BPA through non-radical pathways. Therefore, the magnetic Fe-MCGFS-800 prepared from CGFS is a potential high-efficiency catalytic material for PMS activation. It provides a convenient method and novel insights for the utilization of CGFS-derived catalytic materials and the large-scale application of CGFS.
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RSC Advances
·
2025
·Vol. 15
·期 48
·40789-40800
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IF 4.6
Wei Zhang,Min Liu,Honghui Cheng,Jiafeng Di,Geng Huang,Hua Lai
The application of reactive macromolecular flame retardants in polymers is gaining increasing attention. In this study, the polymer PBOZ-DOPO was readily synthesized via nucleophilic addition between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and a main-chain benzoxazine polymer (PBOZ). It was utilized as both a co-curing agent and polymeric flame retardant for epoxy resin, yielding epoxy thermosets designated as Pn, where n represented the phosphorus content in the cured polymers (n wt%). While all epoxy thermosets retained good transparency, the addition of PBOZ-DOPO reduced thermal stability, as indicated by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Fortunately, the macromolecular structure and the presence of active OH groups in PBOZ-DOPO helped alleviate the decline in glass transition temperature (Tg). When the phosphorus content was below 0.5 wt%, the Tg loss was less than 10 °C. PBOZ-DOPO imparted highly efficient flame retardancy to the epoxy resin. With a phosphorus content of only 0.3 wt%, the epoxy thermoset P3 achieved a limiting oxygen index (LOI) of 34.1% and met the vertical burning (UL-94) V-0 rating. Cone calorimetry tests demonstrated a progressive decrease in heat release rate (HRR), total heat release (THR), and total smoke production (TSP) from P0 to P5. Scanning electron microscopy (SEM) and Raman spectroscopy further revealed that the amount of graphitized carbon layers formed during combustion increased consistently from P0 to P5, supporting the enhanced flame-retardant performance. Tensile tests indicated that the incorporation of PBOZ-DOPO did not significantly compromise tensile strength or elongation at break, particularly in the case of P3. Overall, the results confirmed that PBOZ-DOPO was an excellent flame retardant with well-balanced properties for epoxy resin.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Dongyun Que,Zihan Li,Fan Chen,Youwei Zeng,Junchi Liu,Yuyuan Yao
Designing highly efficient iron-based catalysts with adsorption and degradation of pollutants is a great challenge in the field of environmental remediation. Herein, a dual strategy of anchoring-separation was adopted to prepare novel iron-based nitrogen doped porous carbon catalysts (Fe-pNC). Arginine was innovatively selected as the anchoring agent to coordinate with Fe 3+ and even form oligomers with glucose, which was conducive to the dispersion of iron species during high-temperature pyrolysis. Fe-pNC achieved high iron loading of 16.48 wt% and large specific surface area of 480.19 m 2 /g. The Freundlich model determined a maximum SMX adsorption capacity (Qm) of 82.38 mg/g for Fe-pNC, surpassing most of recently reported SMX adsorbents. Interestingly, even after multiple PMS regenerations, Fe-pNC still exhibited excellent adsorption performance. Surprisingly, Fe-pNC exhibited better adsorption performance at low temperature, achieving 90.58 % adsorption rate at 0 °C. More importantly, the Fe-pNC/PMS system achieved 99.11 % SMX removal in 15 min with a superior apparent rate constant (k obs ) of 0.54 min −1 . Of particular significance, Cl − markedly enhanced the catalytic efficacy of the Fe-pNC for SMX removal, remarkably enhancing the catalytic degradation performance even at high concentrations. Quenching experiments combined with electron paramagnetic resonance (EPR) detections demonstrated that single-linear oxygen 1 O 2 ) and superoxide radicals (O 2 •− ) were the major reactive oxygen species (ROSs). This study provides a significant guidance into developing efficient iron-based catalysts for adsorption and removal of organic pollutants.
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Environmental Science-Nano
·
2025
·
IF 5.1
A. Hefnawy,Mona A. Aziz Aljar,Hisham S. M. Abd-Rabboh,Ayman H. Kamel
A novel potentiometric sensor based on molecularly imprinted polymer (MIP) beads embedded in an asymmetric membrane configuration was developed for the trace monitoring of tetrabromobisphenol A (TBBPA), a widely used brominated flame retardant and persistent environmental pollutant. The sensor was fabricated by incorporating TBBPA-imprinted beads into a poly(vinyl chloride) (PVC) membrane plasticized with dioctyl phthalate (DOP) and drop-cast onto a reduced graphene oxide (rGO)-modified screen-printed electrode. The asymmetric design featured a surface-enriched ion-exchange layer, enabling enhanced accumulation of deprotonated TBBPA at the membrane interface. Under optimized conditions, the sensor exhibited a near-Nernstian slope of −56.6 ± 1.2 mV per decade over a linear range of 5.0 × 10−6 to 10−3 M and a detection limit of 5.5 × 10−7 M. The sensor demonstrated high selectivity toward TBBPA over structurally related phenols and common anions, with the enhanced discrimination attributed to the imprinting effect and nano-scale recognition features. Application to spiked environmental samples including wastewater, sediment, and plastic leachates yielded recoveries between 95.6% and 102.3%, with no significant deviation from high-performance liquid chromatography (HPLC) results (p > 0.05). The proposed MIP-based asymmetric membrane sensor offers a portable, cost-effective, and highly selective platform for on-site environmental monitoring of TBBPA.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuanjie Teng,Pei Xu,Zihang Zhou,Ning Xu,Jiayi Qiu,Yi Zhong,Jie Li,Haimin Shen,Zaifa Pan,Tianyu Hu,Xingchen Zhang,Yantao Lou
The selective detection of weakly adsorbing, low-abundance molecules in complex biological environments remains a fundamental limitation of conventional surface-enhanced Raman scattering (SERS) technology. Here, we engineered a macrocyclic supramolecular pillararene-bridged gold nanoparticle assembly to create sub-nanometer plasmonic gaps with intense electromagnetic hotspots, enabling ultrasensitive molecule detection in complex matrix. The pillararene-functionalized interface not only enhanced SERS signals (with enhancement factor of 1.3 × 10 7 for curcumin, a model phenolic drug), but also provided selective recognition of phenolic biomarkers through host–guest chemistry, effectively suppressing background noise in water, cell lysate and serum environments. Combined with single-molecule counting, the detection limit reached to 1.03 × 10 −12 mol/L for curcumin. Cellular imaging experiments demonstrated that the pillararene linker facilitated intracellular delivery of curcumin while simultaneously amplifying its Raman signal, enabling real-time tracking of drug distribution at subcellular resolution. This work establishes a versatile detecting platform that integrates supramolecular targeting with plasmonic enhancement, advancing spatially resolved detection of low-abundance molecules in complex biological environments for precision diagnostics and therapeutic evaluation.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jintao Dong,Jing Hong,Zhishuai Wang,Pengjun Liu,Gaopeng Liu,Lina Li,Shengqun Cao,Bin Wang,Jiexiang Xia
For achieving the broad-spectrum removal ability of g-C 3 N 4 materials for various contaminants, it is assessed as critical core by synchronously enhancing the solar absorption-conversion and PMS adsorption-activation process of g-C 3 N 4 materials. In this manuscript, S-scheme high-entropy FeMnCoNiCu-LDHs/self-assembly carbon nitride nanotubes (LDHs/SCN) heterojunction were established by mechanical-assisted ball milling, calcination, and hydrothermal method. Contributed to the synergistic effect of multi-metal elements in FeMnCoNiCu-LDHs materials, the photocatalytic PMS activation efficiency of LDHs/SCN composites is benefit from the efficient conversion of Fe 3+ /Fe 2+ , Mn 4+ /Mn 3+ , Co 3+ /Co 2+ , Ni 3+ /Ni 2+ , and Cu 2+ /Cu + redox cycles. So, under 0.1 mM PMS and visible light irradiation, the removal efficiency of bisphenol A (BPA), ciprofloxacin (CIP), 2-mercaptobenzothiazole (MBT), oxytetracycline (OTC), tetracyclines (TC), and sulfadiazine (SD) pollutants in LDHs/SCN-0.2/PMS/Light system reach to 91.1 %, 82.8 %, 94.7 %, 86.8 %, 91.4 % and 63.0 %, respectively. Furthermore, the enhancement mechanism of the photocatalytic PMS activation performance of LDHs/SCN-0.2/PMS/Light system has been elucidated through ESR, UPS, ROS quenching experiments, and band structure analysis. The LC-MS and T.E.S.T. software was successively employed for intermediates transformation pathways and bio-toxicity during BPA degradation. Consequently, this work lays a foundational basis for the design and construction of highly efficient S-scheme heterojunctions for advanced wastewater purification.
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ENVIRONMENTAL POLLUTION
·
2025
·
IF 7.3
Ji Yang,Yuchang He,Chunping Du,Yuqing Zuo,Lingfei Xie,Ping Yan,Rui Dong,Xijuan Tu,Wenbin Chen
The protection of the pollinator honeybee is of significant importance to the maintenance of the ecosystem. In recent years, the contamination of bisphenols (BPs) and microplastics (MPs) has prompted global concern. Nevertheless, the degradation of BPs in honey and the release of BPs from MPs in honey remain unknown. Herein, a novel matrix-induced dispersive liquid-liquid microextraction (MI-DLLME) method coupled with high performance liquid chromatography (HPLC)-fluorescence detection was developed for quantifying BPA and BPB in honey. This approach leverages endogenous honey matrix constituents to facilitate microextraction, offering a robust and efficient analytical strategy. The method was rigorously validated and applied in a survey of 67 honey samples, revealing that only BPA was detectable, with raw apiary honey exhibiting significantly lower contamination levels and detection frequency than commercial honey. Furthermore, the degradation kinetics of BPA and BPB were investigated in four botanical honey types, showing slow degradation rates (0.00344–0.00647 day −1 ) and half-lives ranging from 107 to 201 days. Additionally, the gradual release of BPA from polycarbonate (PC) MPs was observed in honey, with higher water content accelerating the release rate. These findings underscore the need for continued monitoring of BP contamination in honeybee products to safeguard both pollinator health and human consumers.
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Results in Chemistry
·
2025
·
IF 4.2
Jieyao Ma,Tingsheng Ma,Yalan Wu,Huiling Liu,Xian Wang,Huaming Xiao
Bisphenol analogues (BPs) are crucial industrial materials extensively utilized in the production of consumer goods. However, it is still unknown whether they will affect the structure of myoglobin (Mb) and cause adverse impacts. This study systematically investigates the interactions between eleven BPs and their structural analogs with Mb using native electrospray ionization mass spectrometry (native ESI-MS), and further verified their interaction by fluorescence spectroscopy (FLS), circular dichroism (CD), and molecular docking (MD). Specifically, native ESI-MS analysis revealed that four ligands form stable complexes with Mb, and their binding constants were quantitatively determined. Thermodynamic data derived from FLS and CD analyses indicated that ligand binding induces conformational changes in Mb by reducing its α-helix content. MD simulations further elucidated that the binding sites for these ligands are located near the heme pocket of Mb, involving key interactions including hydrogen bonding and hydrophobic forces. Structure-activity relationship analysis suggested that sulfonyl and hydroxyl groups play critical roles in the ligand-Mb binding, where hydrophobic atoms enhance binding affinity by increasing molecular hydrophobicity, and ortho-substituted hydroxyl groups significantly influence binding strength. The integration approaches provide valuable information for the design and toxicity assessment of those bisphenol analogues in environmental implications.
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BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Licong Jia,Kai Kang,Wen Yan,Yan Jin,Kejia Xu,Jingyi Wang,Yipeng Wang,Meng Jiang,Wei Yuan,Shipeng Liu,Lingmei Niu
17β-Estradiol (E2) serves as both a reproductive accelerator and growth promoter, yet its uncontrolled application induces severe endocrine dysfunction. Point-of-care testing (POCT) has emerged as a promising analytical platform for on-site E2 quantification, due to its inherent advantages in terms of sensitive, specific, cost-effective, and instrument-free. We developed a novel strategy combining the high collateral cleavage activity of CRISPR/Cas12a with the strong amplification power of dual-cycle reaction, translating target presence into a colorimetric signal on pregnancy test strip (PTS). In the presence of E2, the dual-cycle amplification was initiated to produce HP2–HP3 (Hairpin DNA 2–Hairpin DNA 3) duplexes. These duplexes then bound to the Cas12a-crRNA complex, activating its trans-cleavage activity. The activated Cas12a subsequently cleaved the ssDNA linkers in the MBs (magnetic beads)-ssDNA (single-stranded DNA)-hCG (human chorionic gonadotropin) conjugates, releasing hCG for quantitative E2 detection through strip color intensity measurement. By integrating CRISPR/Cas12a's high cleavage efficiency with dual-cycle amplification, a visible biosensor was developed, with a linear range of 1.0 × 10 −1 –200.0 pM and a detection limit of 0.0403 pM for E2. In conclusion, an E2 detection platform characterized by prominent sensitivity and convenience was established for monitoring spiked E2 in milk and urine, providing a significant reference for the POCT detection of other targets.
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Polymer Chemistry
·
2025
·
IF 3.9
Aying Wang,Yifen Xu,Wenli Zhao,Jinning Zhang,Fengjun Chen,Zhongxiang Xia,Lidong Zhang,Jing Song,Lixian Yin,Zhi Wang
Benzoxazine resins are widely used in the aerospace and electronics industries due to their high thermal stability and mechanical performance. However, their reliance on petroleum-based precursors and permanent crosslinked networks hinders recyclability, thereby creating environmental challenges. Although existing methods to introduce degradable bonds can improve recyclability, they often compromise thermal performance. To address these issues, we adopted a “rigid conjugated dynamic dihydrazone bond + bio-based synergy” strategy and designed a bio-based benzoxazine resin by synthesizing dihydrazone-containing bisphenol monomers from bio-vanillin and hydrazine hydrate, followed by polymerization with furfurylamine. This strategy incorporated acid-labile dynamic bonds into the crosslinked network while preserving thermal stability. The resin exhibited a char yield of 59.5% at 800 °C, comparable to those of petroleum-based analogues. Moreover, the dynamic network enabled controlled degradation under three conditions: elevated temperature, acetone–water mixtures (2 : 8, v/v), and 0.1 M HCl at 50 °C. In carbon fiber composites, 96% of the original fiber strength (2.64 vs. 2.75 GPa) was retained after 24 hours of resin decomposition, with minimal surface damage. This work demonstrates a bio-based approach for balancing thermal performance and recyclability in thermosetting composites, providing a practical pathway toward sustainable high-performance materials.
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CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Sijia Zhang,Guangyu Bi,Wen-Qiang Li,Yang Wang,Xian-Yang Shi
Carbon nitride (CN)-based photocatalytic processes hold promise for water decontamination, during which the widely acknowledged charge transfer pathway is unfortunately characterized by severe chemical stability challenges. Herein, the intensive yet underestimated energy transfer pathway is achieved in CN nanosheets for durable, efficient, and sustainable water purification. Upon simple oxygen activation in air, the synthesized nanosheets come with an optimal pollutant removal rate constant of 0.18 min −1 under visible light irradiation, far exceeding that of state-of-the-art photocatalysts. It is revealed that the enhanced exciton binding energy inside the CN nanosheets triggers strong exciton effects, promoting the accumulation of triplet-state excitons by regulating the energy gap. The accumulated triplet excitons almost accomplish the transition from oxygen exclusively to singlet oxygen via the energy transfer pathway, which ultimately contributes to the robust degradation of the pollutants. This work proposes a viable strategy to enhance the exciton effect within CN, upon which efficient water treatment technology driven by energy transfer pathways can be expected.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Ying-Jie Zhang,Jia-Shu Tao,Han-Qing Yu
Metal oxides and carbon materials, which can be readily obtained from minerals and biomass, respectively, offer both performance and cost advantages and are the catalysts of choice for catalytic wastewater treatment applications. In this work, we explore the optimal compatibility between catalysts, with metal oxides and carbon materials as examples, and oxidants with peroxymonosulfate and peroxydisulfate (PMS and PDS) as representatives. Metal oxides catalyze PMS effectively and exhibit an efficiency 1–3 orders of magnitude higher than when catalyzing PDS. Conversely, carbon materials catalyze PDS much more effectively, with an efficiency 1–3 orders of magnitude higher than when catalyzing PMS. The scientific mechanism behind such a compatibility is found to be attributed to the polarity-based matching effect between valence bonds on the catalyst surface and the oxidant molecules, following the polarity principle of “similarity-intermiscibility” theory. Composite materials containing metal and carbon prepared according to this mechanism demonstrate robust performance for both PMS and PDS, consistent with the predictions and validating the rationality and expandability of the compatibility principle. This work provides guidance for catalyst selection in the application of persulfate-catalyzed water purification technology.
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