ANALYTICAL LETTERS
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2025
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IF 1.8
Yulin Zhang,Wang Huang,Qiwei Zhang,Xu Zhang,Yanxiang Liu,Xiaoqiu Yang
Pollution from phenolic endocrine-disrupting chemicals (PEDCs) poses a significant challenge to aquatic ecosystems. However, information on their occurrence and risks in Wuhan’s two primary rivers is limited. This study analyzed nine PEDCs and water quality parameters, detecting four: 4-n-nonylphenol (22–109 ng/L), octylphenol (25.9–73.7 ng/L), bisphenol A (93.3–258 ng/L), and bisphenol S (0.42–3.30 ng/L). Concentration differences between March and April suggested rainfall may influence. Pearson’s correlation analysis showed water temperature positively correlated with PEDCs, while atmospheric pressure, dissolved oxygen, and oxidation-reduction potential were negatively correlated. Risk assessment indicated low-to-moderate risks for these PEDCs in the rivers.
研究领域:
环境科学
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生态毒理学
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水污染控制
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DOI
高影响因子
Chemistry Africa-A Journal of the Tunisian Chemical Society
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2021
·Vol. 4
·期 2
·367-377
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IF 0
Zou Miaomiao,Zou Suyan,Hu Chunyan,Lin Xiaoyun,Ni Yongnian
In this paper, graphite phase carbon nitride (g-C 3 N 4 ) was prepared by one-step high temperature thermal decomposition method, and layered g-C 3 N 4 was prepared by protonation with concentrated hydrochloric acid. The morphology and composition of g-C 3 N 4 were characterised by transmission electron microscope (TEM), energy dispersive spectroscopy (EDS) and X-ray powder diffraction (XRD). Furthermore, the AuNPs-g-C 3 N 4 /GCE was constructed by coating method and potentiostatic deposition method, and the construction process and resistance change of the electrodes were characterised by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The experimental results indicated that the AuNPs-g-C 3 N 4 /GCE has excellent electrocatalytic performance for bisphenol A (BPA) and 4-n-octylphenol (OP). Under optimized experimental conditions, BPA and OP were detected by differential pulse voltammetry (DPV) at the AuNPs-g-C 3 N 4 /GCE. The linear ranges were 0.1–6.5 µmol L −1 and 0.1–3.8 µmol L −1 for BPA and OP, wtih the detection limits of 0.0176 µmol L −1 and 0.0324 µmol L −1 , respectively. In addition, the AuNPs-g-C 3 N 4 /GCE showed satisfactory reproducibility and stability and can be successfully applied to monitor of BPA and OP in baby formula samples.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
SEPARATION AND PURIFICATION TECHNOLOGY
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2017
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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
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Xiaowen Xie,Xiaoguo Ma,Lihui Guo,Yinming Fan,Guolong Zeng,Mengyuan Zhang,Jing Li
A novel multi-templates molecularly imprinted polymer (MIP) was prepared on the surface of mesoporous silica coated magnetic graphene oxide (MGO@mSiO 2 ), and applied for the rapid and selective detection of alkylphenol compounds including bisphenol A (BPA), 4-tert-octylphenol (4-tert-OP) and 4-nonylphenol (4-NP) in water. The synthesized composite was characterized by Fourier transform infrared spectrometer, vibrating sample magnetometer, transmission electron microscopy and Brunauer-Emett-Teller surface area analyzer. The MIP showed high adsorption capacity, good selectivity and fast kinetic for these alkylphenols. The maximum adsorption capacities of the MIP for BPA, 4-tert-OP and 4-NP were 16.81, 35.97 and 61.73 mg g −1 , respectively, which were significantly higher than those of the non-molecularly imprinted polymer (NIP) due to the imprinting effect. The adsorption of alkylphenols reached equilibrium within 30 min, and followed pseudo-second-order kinetic model and Langmuir model well. The MIP exhibited good sorption selectivity towards BPA, 4-tert-OP and 4-NP, and could be reused 5 times. Furthermore, a new method for ultrasensitive determination of BPA, 4-tert-OP and 4-NP in water by high performance liquid chromatography was developed, using MIP-based magnetic solid-phase extraction coupled with dispersive liquid-liquid microextraction. Under the optimum conditions, the limits of detection (LODs) for BPA, 4-tert-OP and 4-NP were 0.013, 0.010 and 0.010 μg L −1 , respectively. The proposed method was used to the detection of BPA, 4-tert-OP and 4-NP in real water samples, with spiked recoveries of 81.5–104.1% and relative standard deviations (RSDs) of 1.0–7.6%, indicating the multi-templates MIP could be a promising adsorbent for separation and analysis of alkylphenols.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
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