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.
研究领域:
海洋生态学
·
环境科学
·
生物地球化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Huihui Gao,Xiaoyu Han,Rong Wang,Keke Zhu,Runping Han
Phenolic compounds are common industrial pollutants that seriously endangers water ecology and human health. Therefore, the development of efficient and recyclable adsorbents is of importance for wastewater treatment . In this research, HCNTs/Fe 3 O 4 composites were constructed using co-precipitation way by loading magnetic Fe 3 O 4 particles onto hydroxylated multi-walled carbon nanotubes (MWCNTs), showing excellent adsorption capacity for Bisphenol A (BPA) and p -chlorophenol ( p -CP), and excellent catalytic ability of activating potassium persulphate (KPS) for degradation of BPA and p -CP. The adsorption capacity and catalytic degradation potential were evaluated for the removal of BPA and p -CP from solutions. The results showed that the adsorption took only 1 h to reach equilibrium and HCNTs/Fe 3 O 4 had maximum adsorption capacities of 113 mg g −1 for BPA and 41.6 mg g −1 for p -CP at 303 K, respectively. The adsorption of BPA fitted well using the Langmuir, Temkin and Freundlich models while the adsorption of p -CP fitted well using the Freundlich and Temkin models. BPA adsorption on HCNTs/Fe 3 O 4 was dominated by π-π stacking and hydrogen bonding forces. The adsorption included both the mono-molecular layer adsorption on the adsorbent surface and the multi-molecular layer adsorption on the non-uniform surface. The adsorption of p -CP on HCNTs/Fe 3 O 4 was a multi-molecular layer adsorption on a dissimilar surface. The adsorption was controlled by forces such as π-π stacking, hydrogen bonding, partition effect and molecular sieve effect. Moreover, KPS was added to the adsorption system to initiate a heterogeneous Fenton-like catalytic degradation. Over a wide pH range (4–10), 90% of the aqueous BPA solution and 88% of the p -CP solution were degraded in 3 and 2 h, respectively. After three adsorption-regeneration or degradation cycles, the removal of BPA and p -CP remained up to 88% and 66%, indicating that HCNTs/Fe 3 O 4 composite is cost-effective, stable and highly efficient to remove BPA and p -CP from solution.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Ming Yuan Wang,Shou Wu Yu,Chen Jing Zhao,Tian Yu Zhang,Gui Xiang Hou
Reducing the dependence of epoxy resin preparation on petroleum resources and developing thermosetting epoxy resins with excellent comprehensive performance are important directions for the current development of epoxy resins. This article uses biomass resource magnolol as the main raw material to prepare magnolol epoxy monomer (DGEM). Then, using 4,4-diaminodiphenylmethane (DDM) as the curing agent, the DGEM and bisphenol A epoxy resin (E44) were blended and cured. The results showed a dual modification effect of DGEM on the toughening and strengthening of E44 epoxy resin. When the mass ratio of DGEM to E44 is 30:70, the bending strength of the cured blended resin is 18.7% higher than that of the E44 system, and the tensile strength is 57.7% higher. When the mass ratio of DGEM to E44 is 5:95, the cured blended resin exhibits the optimal impact strength (5.10 kJ/mol), which is 22.9% higher than the pure E44 system. However, the addition of DGEM reduced the glass transition temperature and crosslinking degree of the blended resin system. The addition of DGEM improves the heat resistance and flame retardancy of the blended resin. When the mass ratio of DGEM: E44 was 50:50, the vertical combustion reached UL-94 V-0 level.
研究领域:
材料科学
·
生物质资源利用
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Fayang Guo,Dabao Li,Jeremy B. Fein,Jingcheng Xu,Yingwei Wang,Qiaoyun Huang,Xingmin Rong
Reactions occurring at silicate minerals play a significant role in controlling phenolic endocrine disrupting chemicals' bioavailability and mobility. However, the underlying molecular mechanisms for BPA (bisphenol A) and BPS (bisphenol S) onto montmorillonite (MMT) remain poorly understood. To decipher the molecular-level interfacial configuration and dominant reaction mechanism, batch experiments, X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) measurements, and density functional theory (DFT) calculations were performed. Our batch adsorption experiments showed that MMT exhibits a higher adsorption capacity for BPS than for BPA. The XRD analysis also suggested that BPA and BPS could enter the interlayer of MMT. FTIR and XPS results revealed that The Ca atoms and the oxygen atoms in the SiO 4 tetrahedra were involved in BPA and BPS adsorption process via non-covalent interactions. The electrostatic potential calculations suggested that the sulfonyl O site and the hydroxyl H site on the BPS molecule are more favorable for interacting with the MMT surface than the hydroxyl O and H sites of the BPA molecule. DFT calculations further confirmed that stronger binding of BPS than BPA onto the (001) surface and the interlayer of MMT. BPA tends to form Ca ion bridges through hydroxyl groups onto MMT. In contrast, BPS prefers to form Ca ion bridges onto MMT through its sulfonyl group and form hydrogen bonds via hydroxyl groups. This study provides new insights into the molecular-scale interactions that control BPA and BPS adsorption onto an important and environmentally-relevant clay mineral, and which affect the fate and behavior of BPA and BPS in soil systems.
研究领域:
环境科学
·
分子生物学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Qingxiang Zhou,Man Lei,Jing Li,Kuifu Zhao,Yongli Liu
Mg-Al-layered double hydroxide (Mg-Al-LDH) modified nanoscale zero-valent iron (NZVI) (Fe@MgAl-LDH) was firstly synthesized and characterized by several techniques. The results showed that the layered double hydroxides were coated on the surface of nanoscale zero-valent iron particles. This new material exhibited good adsorption for bisphenol A, 4-octylphenol and 4-nonylphenol from water samples. Based on these, a sensitive method was developed for the extraction and preconcentration of bisphenol A, 4-octylphenol and 4-nonylphenol using magnetic Fe@MgAl-LDH nanoparticles as the solid phase extraction adsorbents prior to high performance liquid chromatography coupled with variable wavelength detection. Under the optimal conditions, linear responses were achieved in the range of 0.5–200 μg L −1 with the correlation coefficients (r) above 0.999. The detection limits of three analytes were in the range of 0.24–0.34 μg L −1 , and precisions were all below 2.5% (n = 6). The proposed method was evaluated with real water samples and the excellent spiked recoveries in the range of 96.0–99.3% were achieved.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Jie Zhang,Tiehua Zhang,Tianzhu Guan,Ping Ruan,Dayong Ren,Weichang Dai,Hansong Yu,Tiezhu Li
A fluorescence polarization (FP) assay for the simultaneous determination of bisphenol A (BPA), bisphenol F (BPF), bisphenol A diglycidyl ether (BADGE) and bisphenol F diglycidyl ether (BFDGE) was developed. The method was based on the competition between bisphenols (BPs) and fluorescein-labeled dexamethasone derivative (Dex-fl) for mouse peroxisome proliferator-activated receptor α ligand binding domain (mPPARα-LBD). A recombinant soluble protein derivative mPPARα-LBD* was prepared, then in vitro binding of 4 BPs to mPPARα-LBD* was investigated. Fluorescence polarization assay showed that these compounds exhibited different binding potencies with mPPARα-LBD*. Additionally, molecular dynamics simulations were performed to further understand the mechanism of BPs binding affinity for mPPARα-LBD*. Docking results elucidated that the driving forces for the binding of BPs to mPPARα-LBD* were predominantly dependent on hydrophobic and hydrogen-bonding interactions. Comparison of the calculated binding energies vs. experimental binding affinities yielded a good correlation (R 2 = 0.7258). The proposed method has potential for multi-residue detection of BPA, BPF, BADGE, and BFDGE.
研究领域:
生物化学
·
环境科学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 19
·5037-5043
·
IF 1.855
Yingtang Li,Yang Jiao,Yuhong Guo,Yaling Yang
A new and fast microextraction technique termed vortex-assisted supramolecular solvent microextraction (VASUSME) has been developed. The method was based on the microextraction of endocrine disrupting compounds (EDCs), including bisphenol-A (BPA), 2,4-dichlorophenol (2,4-DCP), bisphenol-AF (BPAF) and tetrabromobisphenol-A (TBBPA) in 10 mL sample with 500 μL of a supramolecular solvent (SUPRASs), and then detection by high-performance liquid chromatography (HPLC). In the VASUSME procedure, dispersion of microvolumes of a low density extraction solvent into the aqueous sample is achieved by vortex mixing, a mild emulsification procedure. Under the optimum conditions, the repeatability of the proposed method was found to be good. The relative standard deviations (RSD, n = 5) were 3.98–5.64%. The limits of detection (LOD) were in the range of 0.14–0.32 ng mL−1 and the limits of quantification (LOQ) were in the range of 0.41–1.02 ng mL−1. All correlation coefficients of the calibration curves were higher than 0.998. Recoveries of the EDCs spiked into samples of liquid foods and their packaging materials were in the range of 91% to 105.1%. The VASSUSME method was successfully applied to the analysis of BPA, 2,4-DCP, BPAF and TBBPA in samples of liquid foods and their packaging materials. Moreover, the method is simple, sensitive and environmentally-friendly and consumes much less solvent than traditional methods.
研究领域:
分析化学
·
环境科学
·
食品安全
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Xijuan Tu,Chunping Du,Yuchang He,Ji Yang,Jiaxu Chen,Qian Jin,Lingfei Xie,Yuqing Zuo,Shaokang Huang,Wenbin Chen
The methodology of sugaring out–assisted liquid–liquid extraction (SULLE) coupled with high-performance liquid chromatography–fluorescence detection was devised for quantifying bisphenol A (BPA) and bisphenol B (BPB) in beeswax. The effectiveness of SULLE was methodically explored and proved superior to the salting out–assisted liquid–liquid extraction approach for beeswax sample preparation. The analytical performance underwent comprehensive validation, revealing detection limits of 10 μg/kg for BPA and 20 μg/kg for BPB. The method developed was employed to analyse commercial beeswax (n = 15), beeswax foundation (n = 15) and wild-build comb wax (n = 26) samples. The analysis revealed BPA presence in four commercial beeswax samples and three beeswax foundation samples, with the highest detected residue content being 88 ± 7 μg/kg. For BPB, two beeswax foundation samples were positive, with concentrations below the limits of quantification and 85 ± 4 μg/kg, respectively. No bisphenols were detected in wild-build comb wax. Furthermore, the bisphenol removal efficacy of two recycling methods—boiling in water and methanol extraction—was assessed. The findings indicated that after four recycling cycles using water boiling, 9.6% of BPA and 29.2% of BPB remained in the beeswax. Whereas methanol extraction resulted in approximately 7% residual after one recycling process. A long-term study over 210 days revealed the slow degradation of bisphenols in comb beeswax. This degradation fitted well with a first-order model, indicating half-lives (DT 50 ) of 139 days for BPA and 151 days for BPB, respectively. This research provides the first report on bisphenol contamination in beeswax. The low removal rate during the recycling process and the gradual degradation in beeswax underscore the significance of bisphenol contamination and migration in bee hives along with their potential risk to pollinators warranting concern. Furthermore, the developed SULLE method shows promise in preparing beeswax samples to analyse other analytes.
研究领域:
环境科学
·
分析化学
·
生态学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 3
·141
·
IF 3.504
Guangyin Fan,Xiaojing Li,Caili Xu,Weidong Jiang,Yun Zhang,Daojiang Gao,Jian Bi,Yi Wang
Developing highly efficient and recyclable catalysts for the transformation of toxic organic contaminates still remains a challenge. Herein, Titanium Carbide (Ti3C2) MXene modified by alkali treatment process was selected as a support (designated as alk-Ti3C2X2, where X represents the surface terminations) for the synthesis of Pd/alk-Ti3C2X2. Results show that the alkali treatment leads to the increase of surface area and surface oxygen-containing groups of Ti3C2X2, thereby facilitating the dispersion and stabilization of Pd species on the surface of alk-Ti3C2X2. The Pd/alk-Ti3C2X2catalyst shows excellent catalytic activity for the hydrodechlorination of 4-chlorophenol and the hydrogenation of 4-nitrophenol in aqueous solution at 25 °C and hydrogen balloon pressure. High initial reaction rates of 216.6 and 126.3 min−1·gpd−1are observed for the hydrodechlorination of 4-chlorophenol and hydrogenation of 4-nitrophenol, respectively. Most importantly, Pd/alk-Ti3C2X2exhibits excellent stability and recyclability in both reactions without any promoters. The superior property of Pd/alk-Ti3C2X2makes it as a potential material for practical applications.Keywords:palladium;titanium carbide;catalytic transformation;4-chlorophenol;4-nitrophenol
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
PHARMAZIE
·
2012
·Vol. 67
·期 12
·1002-1006
·
IF 1.006
Dong Rui-Hua,Fang Zhong-Ze,Zhu Liang-Liang,Ge Guang-Bo,Cao Yun-Feng,Li Xiao-Bao,Hu Cui-Min,Yang Ling,Liu Ze-Yuan
Carvacrol and thymol are phenolic compounds with similar structures isolated from many aromatic plants, and have been demonstrated to exert multiple pharmacological effects. The metabolic and pharmacokinetic behaviour of thymol and carvacrol has received much attention. Carvacrol and
thymol have been demonstrated to undergo phase I metabolism such as hydroxylation reaction. However, drug-metabolizing enzymes involved in this process remain unclear. Given that cytochrome P450 s (CYPs) are involved in most phase I metabolism, the aim of the present study was to investigate
the role of CYPs in the metabolism of thymol and carvacrol. After incubation with human liver microsomes (HLMs) in the presence of NADPH, a new metabolite and two metabolites were detected for thymol and carvacrol, respectively. A combination of chemical inhibition studies and assays with
recombinant CYP isoforms demonstrated that CYP2A6 was the predominant drug-metabolizing enzyme involved in the metabolism of thymol and carvacrol. All these results remind the researchers that special attention should be paid on pharmacokinetic and clinical outcomes when thymol or carvacrol
was co-administrated with other compounds mainly undergoing CYP2A6-mediated metabolism.
研究领域:
药理学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2011
·Vol. 137
·期 4
·944-952
·
IF 3.913
Yanli Quan,Zhonghua Xue,Haicai Shi,Xibing Zhou,Jie Du,Xiuhui Liu,Xiaoquan Lu
A novel idea on the basis of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP) functionalized carbon nanotubes (CNTs) film was developed to simulate the chromatographic separation, which was able to rapidly and simultaneously detect dihydroxybenzene isomers based on their different oxidation potentials and corresponding currents. The mechanism involved in the recognition and isolation of the dihydroxybenzene isomers was explored and confirmed by UV spectra and density functional theory. It was proven that the current method for simultaneously detecting and isolating dihydroxybenzene isomers was ascribed to the priority of porphyrin film to induce oxidation of the three kinds of isomers, and the priority depends to a large extent on the different tendencies of dihydroxybenzene to interact with the peripheral hydroxyl group and with the extended π-conjugated ring of porphyrin. Most important of all, porphyrin functionalized CNTs film allows for the formation of well-defined interface and provides an advantageous and high-performance platform for the simultaneous determination and isolation of dihydroxybenzene isomers.
研究领域:
分析化学
·
电化学
·
纳米材料
·
环境监测
·
药物分析
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Haixia Kong,Pu Zhang,Zhong Wei Jiang,Xiaoting Xie,Wendong Zhang,Xue Gong,Yi Wang
Due to the high perniciousness of dihydroxybenzene isomers toward environment and human health, it is imperative to develop simple and rapid strategies for detecting/distinguishing dihydroxybenzene isomers. However, most of the traditional approaches can only respond to single component of dihydroxybenzene isomers, which limits their application in the assay of complex samples. Herein, we develop a colorimetric sensing array based on the peroxidase-like activity of double-shell hollow FeCoO x nanozyme. Since different phenolic substances showed distinct kinetics during the catalytic reaction with the participation of FeCoO x , three different kinds of dihydroxybenzene isomers could be identified by principal component analysis. Moreover, various combinations of mixed dihydroxybenzene isomers with different concentrations can also be completely distinguished within 30 min in tap water and environmental water. The method showed a good linear response to catechol, resorcinol, and hydroquinone in the range of 1.5 to 100 µM, 5 to 100 µM, and 1 to 100 µM, respectively, with corresponding detection limit of 1.37 µM, 2.91 μM, and 0.824 μM. Besides, we have constructed a smartphone-based portable platform for analyzing various combinations of mixed dihydroxybenzene in actual water. This work provides a new idea for distinguishing phenolic substances with similar structures, and is promising to identify and monitor phenolic pollutants in industrial wastewater.
研究领域:
环境科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）