ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Yang Liu,Xueping Dang,Huaixia Chen
A molecularly imprinted polymer (MIP) monolithic column was prepared in situ in a pipette tip using phenol and bisphenol A as dual templates, 4-vinyl pyridine and β -cyclodextrin as bifunctional monomers . It was used for the selective and simultaneous solid phase extraction of eight phenolics, including phenol, m-cresol, p-tert-butylphenol, bisphenol A, bisphenol B, bisphenol E, bisphenol Z, and bisphenol AP. The MIP monolithic column was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy , thermogravimetric analysis and nitrogen adsorption experiment. The results of selective adsorption experiments showed that the MIP monolithic column can selective recognize the phenolics and have excellent adsorption property. The imprinting factor for bisphenol A can be as high as 4.31, and the maximum adsorption capacity for bisphenol Z can reach 201.66 mg g −1 . Under the optimal extraction conditions, a selective and simultaneous extraction and determination method for eight phenolics was established based on the MIP monolithic column and high-performance liquid chromatography with ultraviolet detection. The linear ranges (LRs) of the eight phenolics were 0.5–200 μg L −1 , the limits of quantification (LOQs) and detection (LODs) were 0.5–2.0 μg L −1 and 0.15–0.67 μg L −1 . The method was applied to detect the migration quantity of the eight phenolics from polycarbonate cups and had satisfactory recovery. The method has the advantages of simple synthesis, short extraction time, as well as good repeatability and reproducibility, which provides a sensitive and reliable strategy for extracting and detecting phenolics from food contact material.
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FOOD CHEMISTRY
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2023
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IF 8.8
Linna Guo,Miao Tian,Zhi Li,Qianqian Wang,Qiuhua Wu,Lin Hao,Chun Wang
Wide use of phenylurea herbicide has caused serious residue problem and threaten human health. It is important to develop viable method for their sensitive determination. Herein, a multi-functionalized porous polymer was prepared by crosslinking hexafluorobisphenol A with pyromellitic dianhydride. Using the multi-functionalized porous polymer as solid phase extraction sorbent, combined with high performance liquid chromatography, a sensitive method was established for determining phenylurea herbicides in beverages and celtuces. High sensitivity was achieved, with method detection limit (S/N = 3) of 0.01–––0.025 ng mL −1 for beverages, 1.70 ng g −1 for celtuce, and quantitation limits of 0.03–––0.10 ng mL −1 for beverages, 5.00 ng g −1 for celtuce. The method recoveries were 80.5–––120.0 % with relative standard deviations lower than 6.1%. Adsorption mechanism mainly involved F-π, F-O, π-π, polar interactions and hydrogen-bonding interactions. This study offers a simple protocol to develop multi-functional sorbents for extraction of organic pollutants.
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WATER RESEARCH
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2023
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IF 12.8
Zhao Song,Yu Zhang,Xue Zhang,Xu Zhou,Yidi Chen,Xiaoguang Duan,Nanqi Ren
Peracetic acid is an emerging oxidant and disinfectant for wastewater purification. In this study, we first developed a comprehensive and accurate model to elucidate the reaction mechanisms and simulate reaction kinetics of peracetic acid (PAA, CH 3 C(=O)OOH) activated by chloride (Cl – ) based on experimental results and literature. A diversity of experiments methods (e.g., quenching experiments, probe compounds degradation, electron paramagnetic resonance (EPR) measurements) and kinetic modeling were used to determine the reactive species. As a result, carbon-centered radicals and free chlorine reactive species (Cl 2 and HClO) were devoted to BPA degradation in the PAA/Cl − system. The carbon-centered radicals CH 3 C(=O)OO • , CH 3 C(=O)O • , CH 3 OO • , and • CH 3 greatly accelerated BPA degradation with their corresponding kinetics of k CH 3 C(=O)OO•, BPA = 2 × 10 8 M − 1 s −1 , k CH 3C(= O)O• , BPA = 2 × 10 7 M − 1 s −1 , k •CH 3 , BPA = 2 × 10 6 M − 1 s −1 and k CH 3 OO•, BPA = 2 × 10 4 M − 1 s −1 . Dissolved Cl 2 (l) species was also important for BPA degradation with k Cl 2 , BPA of 2 × 10 7 M − 1 s −1 , much higher than HClO/ClO − of k HClO, BPA = 1.2 × 10 1 M − 1 s −1 and k ClO − , BPA = 9 × 10 −3 M − 1 s −1 . While free chlorine tends to transform BPA to estrogenic chlorinated organic products, the primary degradation of BPA by carbon-centered radicals results in chlorine-free products, reducing the production of disinfection byproducts during the treatment of saline wastewater. This study improves the knowledge of reaction kinetics and mechanism and reactive species generation in the PAA/Cl – system.
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ENVIRONMENTAL TOXICOLOGY
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2023
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IF 4.5
Weiqi Cui,Hui Zhou,Jingxian Zhang,Junwei Zhang,Deqiao Wu,Ying Rong,Fanglin Liu,Junhui Liu,Haiyan Liu,Bo Wei,Youcai Tang,Xinglin Liao,Xia Xu
The environmental pollutant bisphenol A (BPA), used in the manufacture of plastic packaging materials for various diets, is widely distributed in the environment and causes severe hepatotoxicity by inducing oxidative stress. Artemisia argyi essential oil (AAEO), a volatile oil component isolated from Artemisia argyi H.Lév . & Vaniot , has pharmacological effects, especially for hepatoprotective actions. However, the potential effect of AAEO in BPA induced hepatotoxicity has not been characterized. First, we analyzed the chemical composition in AAEO by gas chromatography–mass spectrometry. Herein, we investigated the effect of AAEO on hepatic metabolic changes in mice exposed to BPA. Results showed that compared with the BPA group, AAEO could reduce the level of liver function enzymes in BPA mice serum, and ameliorate hepatic lesions and fibrosis. Additionally, 20 differential metabolites screened by metabolomics were mainly involved in the reprogramming of glutathione metabolism, purine metabolism, and polyunsaturated fatty acid synthesis. Moreover, AAEO could reduce hepatic ferroptosis induced by BPA, as demonstrated by reducing xanthine oxidase activity, up-regulating the activities of glutathione peroxidase 4 (GPX4), superoxide dismutase, and catalase and the expression of SLC7A11 to promote the glutathione synthetic, while inhibiting transferrin receptor 1 (TFR1) expression to reduce the accumulation of Fe 2+ in cells. Therefore, our study identified AAEO as a hepatic protectant against BPA-induced hepatotoxicity by reversing the occurrence of ferroptosis.
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MATERIALS LETTERS
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2023
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IF 3
Xiaobao Li,Wenxia Xia,Liming Shen,Weiming Tan,Xinliang Luo
To improve the mechanical properties of epoxy resin (EP), cellulose nanoparticles (CNP)/EP composites were prepared using an in-situ reaction method. Fourier-transform infrared spectroscopy analysis showed that cellulose nanocrystalline (CNC) decomposed into CNP in the reaction, and grafted with epoxy resin E44. Environmental scanning electron microscope analysis showed that the CNP had good interfacial compatibility and dispersion in the EP. TEM analysis showed that the CNC decomposed into CNP during the process of copolymerization with epoxy resin E44, and the size of the CNP was around 50–100 nm. With the addition of 0.3 wt% CNC, the tensile strength of the CNP/EP composite film increased by 24%, the tensile modulus increased by 26%, the elongation at break increased by 61%, and tensile toughness increased by 101%. Therefore, in this work, we presented a novel cellulose nanoparticle to simultaneously strengthen and toughen epoxy resin.
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WATER RESEARCH
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2023
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IF 12.8
Mengfan Luo,Heng Zhang,Yang Shi,Jia Zhao,Can Feng,Jialong Yin,Yang Liu,Peng Zhou,Zhaokun Xiong,Bo Lai
Advanced oxidation technologies based on periodate (PI, IO 4 − ) have garnered significant attention in water decontamination. In this work, we found that electrochemical activation using graphite electrodes (E-GP) can significantly accelerate the degradation of micropollutants by PI. The E-GP/PI system achieved almost complete removal of bisphenol A (BPA) within 15 min, exhibited unprecedented pH tolerance ranging from pH 3.0 to 9.0, and showed more than 90% BPA depletion after 20 h of continuous operation. Additionally, the E-GP/PI system can realize the stoichiometric transformation of PI into iodate, dramatically decreasing the formation of iodinated disinfection by-products. Mechanistic studies confirmed that singlet oxygen ( 1 O 2 ) is the primary reactive oxygen species in the E-GP/PI system. A comprehensive evaluation of the oxidation kinetics of 1 O 2 with 15 phenolic compounds revealed a dual descriptor model based on quantitative structure−activity relationship (QSAR) analysis. The model corroborates that pollutants exhibiting strong electron-donating capabilities and high p K a values are more susceptible to attack by 1 O 2 through a proton transfer mechanism. The unique selectivity induced by 1 O 2 in the E-GP/PI system allows it to exhibit strong resistance to aqueous matrices. Thus, this study demonstrates a green system for the sustainable and effective elimination of pollutants, while providing mechanistic insights into the selective oxidation behaviour of 1 O 2 .
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2023
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IF 11.4
Yishuai Pan,Xiaoshan Zheng,Guoqiang Zhao,Zepeng Rao,Wanchao Yu,Baoliang Chen,Chiheng Chu
The hydroxyl radical (•OH) is a potent oxidant and key reactive species in mediating element cycles and pollutant dynamics in the natural environment. The natural source of •OH is historically linked to photochemical processes (e.g., photoactivation of natural organic matter or iron minerals) or redox chemical processes (e.g., reaction of microbe-excreted or reduced iron/natural organic matter/sulfide-released electrons with O2 in soils and sediments). This study revealed a ubiquitous source of •OH production via water vapor condensation on iron mineral surfaces. Distinct •OH productions (15–478 nM via water vapor condensation) were observed on all investigated iron minerals of abundant natural occurrence (i.e., goethite, hematite, and magnetite). The spontaneous •OH productions were triggered by contact electrification and Fenton-like activation of hydrogen peroxide (H2O2) at the water–iron mineral interface. Those •OH drove efficient transformation of organic pollutants associated on iron mineral surfaces. After 240 cycles of water vapor condensation and evaporation, bisphenol A and carbamazepine degraded by 25%–100% and 16%–51%, respectively, forming •OH-mediated arene/alkene hydroxylation products. Our findings largely broaden the natural source of •OH. Given the ubiquitous existence of iron minerals on Earth’s surface, those newly discovered •OH could play a role in the transformation of pollutants and organic carbon associated with iron mineral surfaces.
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HIGH PERFORMANCE POLYMERS
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2023
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IF 2.1
Slimane Abdous,Mehdi Derradji,Zineb Mekhalif,Karim Khiari,Oussama Mehelli,Younes Bourenane Cherif
Given their substantial neutron capture cross-section, extreme hardness, and high chemical and thermal stability, boron-based materials are widely used as building blocks to protect against highly ionizing radiations such as gamma rays and neutrons. Indeed, uncontrolled nuclear radiation exposure can be highly hazardous to radiation workers and the general public. In this sense, this work presents an extensive study and experimental evaluation of the nuclear shielding features of boron carbide (B4C) based nanocomposite, where bisphenol-A based polybenzoxazine (BA-PBz) was used as matrix. The latter was used for its wide range of interesting properties that overcome some of the shortcomings of conventional phenolic resins. A two-pot synthesis process was adopted for the synthesis of (BA-Bz) monomer. Moreover, the boron carbide nanoparticles were treated with a silane (KH-560) coupling agent in order to improve the intramolecular interactions with the polymeric matrix. The neutron shielding studies were carried out at the Nuclear Research reactor of Algeria NUR. The results showed that the developed boron carbide-based nanocomposite exhibits intriguing shielding performances and good thermal stability. The highest performances were obtained at a B4C concentration of 5. wt %, where the macroscopic cross section was found to be (Σ = 3.3878 cm−1) with a screening ratio of (S = 97.78%).
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Hui-Shan Meng,Shu-Zhen He,Mei-Mei Wang,Jia-Rui Xi,Jia-Tai Wen,Hong-Wei Luo,Wei-Kang Wang,Juan Xu
The activation of persulfate by heterogeneous catalysts is susceptible to background matrices present in wastewater, resulting in reduced catalytic efficiency during practical applications. Herein, a persulfate activation cell (PAC) is developed by spatially separating pollutants and persulfate into two independent chambers. The CuCoNi-NF catalyst is fabricated and utilized as the electrode of the PAC. The performance of the PAC is compared with a mixed persulfate activation system (PAM) concerning cyclic degradation of various phenolic pollutants and in the presence of different environmental matrices. The results indicate that phenol pollutants such as bisphenol A (BPA) can be degraded in the PAC via transferring electrons to persulfate. The PAC exhibits superior stability compared to the PAM during six cyclic BPA degradation experiments, with BPA degradation rate constant decreasing by 16.7% for PAC and 81.9% for PAM. Over the 192-hour continuous operation period, the PAC attains a BPA removal efficiency of 88.8 ± 5.6%, a TOC removal efficiency of 74.0 ± 4.6%., and a current output of 0.24 ± 0.04 mA. Furthermore, environmental matrices such as cations, anions, humic acid, and natural water environments demonstrate a slight enhancing effect on BPA degradation in the PAC while conversely displaying inhibition in the PAM. High solution conductivity benefits BPA degradation in the PAC by reducing internal resistance. The pH level of the environment (pH 6–9) has minimal impact on the degradation of BPA in the PAC. The pollutants begin to degrade in PAC when the anode potential reaches their oxidation potential, and the stable potential difference between the anode and cathode ensures the continuous oxidation of the pollutants. Our work proposes a novel persulfate activation strategy that can effectively degrade target pollutants by resisting environmental interferences.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yanbin Wang,Zezhou Shi,Haibo Shen,Qiushuang Xing,Yunqing Pi
Efficient and selective removal of organic contaminants using traditional radical-dominated Advanced Oxidation Processes (AOPs) in complex environmental matrices is challenging, especially under high salinity conditions. This study proposes an alternative approach using iron (II) phthalocyanine-supported g-C 3 N 4 composite (FePc/CN) as a peroxymonosulfate (PMS) activator to efficiently remove organic contaminants. The FePc/CN-PMS process was selective towards the elimination of various organic contaminants, and those compounds with lower ionization potential value can be effectively degraded after reaction for 10 min. Results from radical quenching experiments, electron spin resonance (ESR), and PMSO chemical probe indicated that the dominant active species in the FePc/CN-PMS process are high-valent iron-oxo species (Fe IV O 2+ ), rather than the long-recognized SO 4 •− and •OH radical. A total of 22 intermediate products resulting from the degradation of levofloxacin (LVF) were identified by LC-MS. Additionally, two degradation pathways of LVF were proposed, with the piperazine ring of LVF being the primary site of degradation. The 5%FePc/CN-PMS system demonstrates resistance to ubiquitous inorganic anions and dissolved organic matter (DOM) in an aquatic environment, enabling efficient removal of (LVF) even under high salinity conditions. Furthermore, the 5%FePc/CN catalyst exhibits good chemical stability and reusability, making it a viable option for practical water remediation.
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International Journal of Electrochemical Science
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2023
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IF 1.5
Ruli Xu,Xiaomin Qian,Zhiyuan Zhang,Fanshu Yuan,Yuqing Song,Jie Liu,Qianli Zhang,Jie Wei
A sensitive and selective carbon paste electrode (CPE) for the detection of bisphenol A (BPA) was prepared using N doped multi-walled carbon nanotubes (N-MWCNT) as the electron transport accelerator and molecularly imprinted polymer (MIP) as the recognition element of BPA. In presence of the initiator of 2, 2′-azobis(isobutyronitrile) (AIBN), BPA was imprinted using acrylonitrile as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross-linker. The polymers of MIP and non-molecularly imprinted polymer (NIP) were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Under the optimized conditions, the oxidation peak current increases linearly with the increase of BPA concentration in the range of 0.05 – 90 μmol/L (R = 0.9991), and the detection limit was 11.8 nmol/L. MIP/N-MWCNT/CPE successfully detected BPA in the elution solution of a plastic bottle.
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CHEMOSPHERE
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2023
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IF 8.8
Fuwei Yu,Fei Jin,Yi Cong,Yadi Lou,Zhaochuan Li,Ruijing Li,Baojun Ding,Ying Wang,Jingwen Chen,Juying Wang
Nanoplastics (NPs) are emerging pollutants posing risks to marine biota and human health due to their small size and high bioavailability . However, there are still knowledge gaps regarding effects of co-existing pollutants on NPs toxicity to marine organisms at their respective environmentally relevant concentrations. Herein we investigated developmental toxicity and histopathological alterations caused by co-exposure of polystyrene nanoplastics (PS-NPs) and bisphenol A (BPA) to marine medaka, Oryzias melastigma . Embryos at 6 h post-fertilization were exposed to 50-nm PS-NPs (55 μg/L) or BPA (100 μg/L) or co-exposed to a combination of both. Results showed that PS-NPs exhibited decreased embryonic heart rate, larval body length, and embryonic survival as well as larval deformities such as hemorrhaging and craniofacial abnormality. When co-exposed, BPA mitigated all the adverse developmental effects caused by PS-NPs. PS-NPs also led to an increase in histopathological condition index of liver with early inflammatory responses, while co-exposure of BPA with PS-NPs did not. Our data suggest that the toxicity reduction of PS-NPs in the presence of BPA might result from the decreased bioaccumulation of PS-NPs caused by the interaction between BPA and PS-NPs. This study unveiled the impact of BPA on the toxicity of nanoplastics in marine fish during early developmental stages and highlight the need of more research on the long-term effects of complex mixtures in the marine environment by applying omics approaches to better understand the toxicity mechanism.
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危险品化学品经营许可证（带存储）