SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Huiming Xiang,Yisheng Shao,Naiyun Gao,Xian Lu,Na An,Chaoqun Tan,Zhaofang Zheng
The degradation of diuron by chlorination and UV/chlorine process and the formation of disinfection by-products (DBPs) was investigated in this study. The degradation of diuron followed the pseudo first-order kinetics model. In UV/chlorine process, hydroxyl radical were proved to provide more contribution in the oxidation. The degradation kinetics increased with the increasing of chlorine dosage and the decreasing of natural organic matter (NOM) dosage. However, the degradation pathways were defined using high performance liquid chromatography coupled with a TSQ Quantum quadrupole mass spectrometer (HPLC-ESI/MS). The formation of DBPs after chlorination and chloramination was defined using gas chromatography with elect ion capture detector (GC-ECD) and gas chromatography–mass spectrometer (GC–MS). Several kinds of DBPs including chloroform (TCM), 1,1-dichloroacetone (1,1-DCP), 1,1,1-trichloroacetone (1,1,1-TCP), trichloronitromethane (TCNM), dichloroacetamide (DCAcAm) and trichloroacetamide (TCAcAm) was identified in this study.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Hongyuan Zhao,Mengyuan Zhao,Yuyang Zhang,Yaling Bi,Xuchun Wang,Qiwen Ran,Canping Pan,Zirong Li
A novel one-pot ultrasonic-assisted method was developed to fabricate Super P carbon black (SPCB)-bridged conductive networks comprising halloysite nanotubes (Hal) and whisker carbon nanotubes (WCN). This WCN/SPCB/Hal nanocomposite was engineered into a sensing platform on glassy carbon electrode (GCE) for diuron (DU) detection. In this architecture, the non-entangled WCN backbone offered high electrolyte adsorption capacity, facilitating the rapid ion transport. Hal provided high-affinity sites to preconcentrate DU at the interface, while SPCB bridged the conductive pathways between WCN and Hal. The resulting WCN/SPCB/Hal/GCE sensor demonstrated good electrochemical performance for DU detection with detection limit of 29.45 nM and sensitivity of 1.6121 μA/μM (linear range: 0.1–20 μM). It also demonstrated good reproducibility, repeatability, and anti-interference capability. The practical application of WCN/SPCB/Hal/GCE in juice samples yielded favorable recoveries of 95.18–102.70% and low relative standard deviations ranging from 2.30% to 4.30%, confirming its potential for rapid DU analysis in fruit-based matrices.
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DOI
PubMed
高影响因子
AQUATIC TOXICOLOGY
·
2026
·
IF 4.3
Jingjing Shi,Tianlie Luo,Zhuang Wang,Xi Ren,Yueyu Ran,Yuehan Peng,Guo Liu,Willie Peijnenburg
The liver plays a central role in xenobiotic metabolism and is consequently highly vulnerable to chemical-induced injury. Nevertheless, the mechanisms underlying diuron-induced hepatotoxicity remain poorly understood. Zebrafish ( Danio rerio ) were exposed to diuron at concentrations of 50 and 500 μg/L for 21 days, with subsequent analysis of the induced hepatotoxicity employing a combination of physiological, biochemical, and metabolomic techniques. Results showed that diuron significantly bioaccumulated in zebrafish, with bioconcentration factor (BCF) values ranging from 14.0 to 40.49 L/kg. Tissue distribution analysis indicated that the liver was the primary site of accumulation (491.48 ± 19.48 ng/g), while the brain also showed substantial accumulation (334.84 ± 10.90 ng/g) at an exposure concentration of 500 μg/L. Further examination of diuron metabolism in the liver identified 13 metabolites produced through demethylation, hydrolysis, oxidation, and C-N bond cleavage. These metabolic alterations correlated with histopathological damage, oxidative stress, and lipid peroxidation. Untargeted metabolomics further revealed a significant disruption in key metabolic pathways, particularly in arginine metabolism and the TCA cycle. Mechamistically, diuron-induced hepatotoxicity in zebrafish is characterized by the downregulation of key metabolites, namely gamma-Glutamyltyrosine, Leucylproline, and Malate, collectively contributing to the disruption of the tricarboxylic acid cycle alongside arachidonic acid, glutathione, and arginine metabolic pathways. These disturbances may represent the core mechanisms underlying hepatotoxicity. Collectively, these findings will improve understanding of metabolic disorders in the liver and provide valuable insights into ecological risk assessments related to chemicals, and provide novel mechanistic insights into diuron induced hepatotoxicity.
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PubMed
高影响因子
IONICS
·
2017
·Vol. 24
·期 8
·2465-2472
·
IF 2.062
Sun Junyong,Gan Tian,Zhai Rui,Fu Wanqiu,Zhang Miaomiao
In the current study, a simple, recoverable, and stable sensor was developed based on SiO 2 spheres functionalized with 6-nm Au nanoparticles (SiO 2 @AuNPs). Fabrication procedures and analytical application of this sensor toward quantitative determination of diuron in the presence of interfering compound indole-3-acetic acid were verified by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) methods. It has been observed that diuron oxidation at the surface of sensor occurred at a potential of about 1.09 V which was 210 mV higher than that of indole-3-acetic acid, confirming that this newly prepared sensor appeared to be a good platform for the selective detection of diuron. Moreover, DPV demonstrated a linear relationship from 0.20 to 55 μmol/L and a detection limit of 51.9 nmol/L for diuron. Finally, this sensor was utilized for the determination of diuron in complex vegetable samples.
研究领域:
分析化学
·
环境科学
·
植物生理学
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DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2019
·
IF 4.527
Yi Chen Lu,Meng Han Guo,Jia Hao Mao,Xiao Hui Xiong,Yuan Jian Liu,Yi Li
A novel magnetic MIPs (DUMIPs) was prepared by surface molecular imprinting method using superparamagnetic core-shell nanoparticle (Fe 3 O 4 @SiO 2 ) as the sacrificial support matrix, herbicide diuron as template, α-methacrylic acid as the functional monomer , trimethylolpropane trimethacrylate as the crosslinker, azobisisobutyronitrile as the initiator, and acetonitrile as the porogen. Highly cross-linked porous surface and excellent magnetic property were characterized by Fourier-transform infrared spectroscopy, transmission electron microscopy , and vibrating sample magnetometer, respectively. The adsorption capacity of DUMIPs was 8.1 mg g −1 , 2.6-fold over its corresponding non-imprinted polymers (DUNIPs). The adsorption in DUMIPs was considered as multilayer adsorption and posed high affinity to diuron , due to the better fitting to Freundilich isotherm. Competitive recognition study demonstrated DUMIPs had highly selective binding diuron. DUMIPs, as an influential sorbent has been used for selective extraction of diuron from environmental samples (paddy field water, paddy soil and grain seedlings) and the elution was determined by high efficiency liquid chromatography (HPLC). In this analytical method, various factors affecting the extraction efficiency such as pH, sorbent dosage, utilization efficiency and volumes of eluent were simultaneously investigated. Under the optimal conditions, the linearity of the method obtained is in the range of 0.02–10.0 mg L −1 . The limit of detection is 0.012 mg L −1 . In four spiked levels (0.04, 0.2, 1.0, and 4.0 mg kg −1 ), the recoveries of diuron in real samples are in the range of 83.56%–116.10% with relative standard deviations in the range of 1.21–6.81%. Importantly, compared to C 18 -SPE column, the MMIPs exhibited convenient separation by external magnetic field, strong clean-up capacity, and selective enrichment for diuron. Thus, the DUMIPs-based method is great potential for efficient sample preparation in the determination of trace amounts of diuron residues in complex matrices.
研究领域:
分析化学
·
环境科学
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DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Jin Zhu,Yi He,Lijun Luo,Libo Li,Tianyan You
The improper application of pesticides has resulted in significant environmental contamination. Therefore, determining the level of residual contamination in environmental samples is crucial. Herein, a novel molecularly imprinted polymer-based electrochemical (MIP-EC) sensor based on polyethyleneimine-modified carbon nanotubes/tin sulfide (MWCNTs-PEI/SnS
2
) was developed for the sensitive and selective assay of diuron (DU) in soil samples. The MWCNTs-PEI/SnS
2
was prepared by simply mixing MWCNTs-PEI and SnS
2
nanoflower via ultrasonic dispersion. The as-prepared MWCNTs-PEI/SnS
2
exhibited a large effective surface area, low electron transfer resistance, and superior electrocatalytic activity. Subsequently, a film of MIP was then fabricated in situ on the MWCNTs-PEI/SnS
2
modified glassy carbon electrode surface (MWCNTs-PEI/SnS
2
/GCE) by electropolymerization, using DU as template molecule and o-phenylenediamine (o-PD) as functional monomer. Under the optimal conditions, the developed MIP-EC sensor exhibited two segments of linear relationships in the DU concentrations range of 0.1–2.0 μM (R
2
=0.997), and 2.0–60 μM (R
2
=0.996) with a detection limit of 0.02 μM. Besides, the proposed sensor possessed outstanding analytical performance such as superior selectivity, excellent reproducibility, and great stability. Moreover, the MIP-EC sensor has been successfully applied for DU determination in farm soil and achieved satisfactory recoveries.
研究领域:
环境科学
·
分析化学
·
材料科学
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DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2019
·Vol. 84
·期 9
·2402-2411
·
IF 2.081
Bi Chen,Xiaoming Wang
Diuron is a urea herbicide that is frequently detected in surface water, groundwater, and marine waters. However, there are few methods or guidelines reported on ensuring the quality of sugarcane and soil. In this study, a method was developed for detecting diuron to ensure the quality and safety of food and sugar. Mass spectrometry was used to identify 3,4-dichloroaniline as a marker for the thermal decomposition of diuron, and thus, as a representative component for quantitative diuron analysis. This approach can be used to rapidly detect trace amounts of diuron. In addition, ultrasound-assisted extraction (UAE) and carbon nanotube column purification were used in conjunction with gas chromatography–electron capture detection to detect diuron. The method was then evaluated for its accuracy, detection limit, and viability. The effects of extraction solvent, ultrasound time, and ultrasound power on the extraction efficiency of the analyte from sugarcane and soil were also investigated. The efficiency and optimum conditions of UAE were examined through single-factor experiments and Box–Behnken design (BBD). The optimal extraction conditions were identified as follows: acetonitrile as the extraction solvent, extraction temperature of 27 °C, extraction time of 3.4 min, and ultrasound power of 70 W. Under these conditions, high linearity was achieved for diuron concentrations of 0.01 to 5.0 mg/L, and the purification correlation coefficient was consistently greater than 0.998. Hence, gas chromatography, combined with UAE and BBD, offers superior efficiency extraction, which is sufficiently accurate and precise for pesticide residue analysis. Practical Application We developed an accurate and cost-effective method for detecting diuron (a commonly used herbicide) in soil and sugar samples. We performed experiments to determine the optimum detection conditions for our method. This method can be used for online monitoring of sugar manufacturing processes to ensure food safety and quality.
研究领域:
食品安全
·
分析化学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Dongdong Li,Hongyuan Zhao,Guoquan Wang,Runqiang Liu,Lianyang Bai
Diuron (DU) exhibits good weed control effect but possesses strong hazard to human health, thereby designing a fast and sensitive method to detect DU is highly urgent. Herein, we report the ultrasonic-assisted self-assembly synthesis of porous covalent organic frameworks (COFs) spheres@graphitized multi-walled carbon nanotubes (GCNTs) composite based on π-π conjugation effect at room temperature, which was employed for DU determination. For the COFs@GCNTs composite, COFs with ultrahigh specific surface area shows strong adsorption ability towards DU, whereas GCNTs with favorable conductivity help to form the 3D interconnected conductive network around COFs spheres, thereby effectively compensating for the poor conductivity of COFs. Because of the synergistic effect between COFs and GCNTs, the developed sensor presented a low detection limit of 0.08 µM in the concentration range of 0.30–18.00 µM. Moreover, the actual sample analysis in the tomato and cucumber yielded satisfactory recoveries (96.40%–103.20%), proving reliable practicability of the developed sensor.
研究领域:
材料科学
·
食品科学
·
环境科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 8
·4418
·
IF 4.9
Liang Hao,Jingfei Luan
A novel photocatalytic nanomaterial, Ho2YSbO7, was successfully synthesized for the first time using the solvothermal synthesis technique. In addition, a Ho2YSbO7/Bi2MoO6heterojunction photocatalyst (HBHP) was prepared via the hydrothermal fabrication technique. Extensive characterizations of the synthesized samples were conducted using various instruments, such as an X-ray diffractometer, a Fourier transform infrared spectrometer, a Raman spectrometer, a UV-visible spectrophotometer, an X-ray photoelectron spectrometer, and a transmission electron microscope, as well as X-ray energy dispersive spectroscopy, photoluminescence spectroscopy, a photocurrent test, electrochemical impedance spectroscopy, ultraviolet photoelectron spectroscopy, and electron paramagnetic resonance. The photocatalytic activity of the HBHP was evaluated for the degradation of diuron (DRN) and the mineralization of total organic carbon (TOC) under visible light exposure for 152 min. Remarkable removal efficiencies were achieved, with 99.78% for DRN and 97.19% for TOC. Comparative analysis demonstrated that the HBHP exhibited markedly higher removal efficiencies for DRN compared to Ho2YSbO7, Bi2MoO6, or N-doped TiO2photocatalyst, with removal efficiencies 1.13 times, 1.21 times, or 2.95 times higher, respectively. Similarly, the HBHP demonstrated significantly higher removal efficiencies for TOC compared to Ho2YSbO7, Bi2MoO6, or N-doped TiO2photocatalyst, with removal efficiencies 1.17 times, 1.25 times, or 3.39 times higher, respectively. Furthermore, the HBHP demonstrated excellent stability and reusability. The mechanisms which could enhance the photocatalytic activity remarkably and the involvement of the major active species were comprehensively discussed, with superoxide radicals identified as the primary active species, followed by hydroxyl radicals and holes. The results of this study contribute to the advancement of efficient heterostructural materials and offer valuable insights into the development of sustainable remediation strategies for addressing DRN contamination.
研究领域:
材料科学
·
环境科学
·
化学
·
光催化
·
水处理
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DOI
PubMed
高影响因子
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