Journal of Water Process Engineering
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2025
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IF 6.7
Liling Zeng,Xianyan Ao,Manli Xu,Yunqian Zhang,Zhu Tao
The synergistic removal of organic pollutants by adsorption and photocatalysis can be achieved by adsorption of enriched pollutants, followed by photocatalytic degradation to decompose the pollutants into non-toxic substances. In this work, a category of adsorption-photocatalytic bifunctional composite materials Q[6]-HPAs have been developed through the self-assembly of cucurbit[6]uril (Q[6]) and heteropoly acids (HPAs) like phosphomolybdic acid (PMA), phosphotungstic acid (PTA) and silicotungstic acid (STA). These composites exhibit enhanced surface area, structural stability, and extended light absorption into the visible range. Notably, Q[6]-HPAs have surface charge properties that attract cations and an energy band structure suitable for the generation of reactive oxygen species, thus possessing the potential for efficient adsorption and photodegradation of cationic pesticides. Among which, Q[6]-PMA and Q[6]-PTA removed over 95 % of diquat and paraquat through sequential adsorption and photodegradation. Electrostatic attraction drives the adsorption process, and ·O 2 − and ·OH radicals detected via Electron Spin Resonance (ESR) are the key to photodegradation. Ultimately, Liquid Chromatography-Mass Spectrometer (LC-MS) analysis revealed potential degradation intermediates and products, and toxicity analysis was performed.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 21
·17317-17322
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IF 3.201
Chang Liu,Peng Wang,Xueke Liu,Xiaotong Yi,Zhiqiang Zhou,Donghui Liu
The quaternary ammonium herbicides mainly include paraquat and diquat, whose fast and simultaneous detection is important for environmental and public safety. Herein, we simultaneously analyzed paraquat and diquat by a simple three-component supramolecular sensor array, which was simply prepared from carboxymethyl-β-cyclodextrin (CM-β-CD) and fluorophores. Under the optimal pH, the two herbicides were excellently distinguished in the principal component analysis (PCA) score plot in the presence of various interferences. Then, the results of semi-quantitative analysis through linear discrimination analysis (LDA) also showed good cluster separation for both paraquat and diquat in the concentration range of 10–250 μM. Moreover, in order to test the unknown samples, the support vector machine (SVM) regression model was applied for simultaneous quantitative analysis of paraquat and diquat, which was successful in the prediction of the amount of the two analytes. Accordingly, this simple supramolecular sensor array is expected to be applied in the rapid and accurate analysis of quaternary ammonium herbicides.
研究领域:
分析化学
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环境科学
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生物传感
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Hongbin Pu,Yuting Xie,Qingyi Wei,Da-Wen Sun
SERS sensors based on metal-organic frameworks (MOFs) have garnered considerable attention in trace pesticide residue detection. UiO-66/AuNPs suspension substrates were fabricated by introducing thioglycolic acid (TGA) as a binder to modify the surface of AuNPs to facilitate their electrostatic assembly with UiO-66 prepared through hydrothermal reaction. The proposed substrates were used for quantitative and simultaneous analysis of paraquat and diquat in cabbage. Diquat and paraquat in actual cabbage samples were individually analysed with detection of limits (LOD) of 6 μg/L and 3 μg/L, respectively, and validated with recoveries ranging from 92.65 to 118.34%. Furthermore, the UiO-66/AuNPs substrate was able to differentiate between paraquat and diquat mixtures, even for the concentrations in the cabbage extracts differed by a factor of 100. The proposed UiO-66/AuNPs substrate provides a potentially useful tool for the trace determination of pesticide residues in the practical food safety analysis
研究领域:
分析化学
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食品安全
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2024
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IF 6.2
Ping Wang,Cong-Ying Song,Xuan Lu,Jia-Ning Zhou,Li-Ying Lin,Ting Li,Qin Zhang,Yuan-Qiang Lu
Diquat (DQ) is a widely utilized nonselective herbicide that is primarily used to control a wide range of weeds and crop residues. It also has significant environmental implications. DQ exposure can cause severe damage to the central nervous system (CNS), a critical symptom of acute poisoning that endangers patients. Despite its severity, the underlying mechanisms of DQ-induced toxic encephalopathy remain unclear, hindering the development of precise treatments. Our research demonstrated that acute DQ exposure in mice significantly increases oxidative stress and triggers neuroinflammation in the hippocampus. Furthermore, in vitro findings indicate that the detrimental effects of DQ are mediated by its disruption of autophagic processes, leading to exacerbated neural damage. DQ initially promotes autophagy in BV2 microglia for self-protection against oxidative stress and inflammation. However, this process is subsequently blocked, intensifying neural damage. Crucially, our results show that the activation of autophagy can reverse these adverse effects. This study not only sheds light on the intricate mechanisms of DQ neurotoxicity but also provides potential therapeutic targets for mitigating DQ-induced toxic encephalopathy.
研究领域:
神经科学
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毒理学
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药理学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2019
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IF 2.813
Shengdong Pan,Jiabin Zhang,Qian He,Xiaohong Chen,Micong Jin
In this study, novel benzenesulfonic acid groups modified magnetic microspheres (Fe 3 O 4 @SiO 2 @poly(4-VB)) were synthesized and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectrometry (FTIR), and vibrating sample magnetometer (VSM). The as-prepared Fe 3 O 4 @SiO 2 @poly(4-VB) was employed as a magnetic-phase extraction (MSPE) adsorbent for rapid determination of paraquat (PQ) and diquat (DQ) in human urine samples coupled with ultra-high performance liquid chromatography-high resolution mass spectrometry (UPLC-HRMS). Moreover, this paper had expounded systematically the mass spectrum cracking mechanisms of PQ and DQ. And a zwitterionic functionalized SIELC Obelisc R column was employed for separation and retention of the above two polar herbicides using 50 mmol/L ammonium formate (pH = 3.7)-acetonitrile as the mobile phase. Besides, the adsorption and desorption conditions of Fe 3 O 4 @SiO 2 @poly(4-VB) toward PQ and DQ were optimized in spiking urine samples to obtain the best adsorption and desorption efficiencies. And the adsorption mechanisms of Fe 3 O 4 @SiO 2 @poly(4-VB) toward PQ and DQ referred to synergetic effect of electrostatic attraction and π-π interaction. Under the optimal conditions, the inter-day and intra-day spiking recoveries of the proposed method were in the range of 86.7–109.9% with RSDs less than 10%. The limits of detection (LODs) were obtained by spiking in blank urine samples at a series of low concentrations and were found to be 0.12 μg/L and 0.14 μg/L for PQ and DQ, respectively, which were lower than the comparing literatures. The developed analytical method was proven to be simple, rapid, sensitive, and accurate for clinical poisoning analysis.
研究领域:
分析化学
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毒理学
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临床医学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Wei Zhang,Kuang Luo,Wenjie Chen,Min Chen,Ning Cai,Jumei Li
In surface-enhanced Raman scattering (SERS) measurements, the creation of “hot spots” and the effective concentration of analytes in these areas are crucial for enhancing detection sensitivity. In this work, a novel composite with highly SERS activity, Ag nanospheres decorated Ag nanostar/ZIF-8 composite (Ag NS/ZIF-8/Ag) was achieved via first coating the Ag nanostars with the metal-organic framework ZIF-8, known for its strong molecular adsorption capabilities, followed by the electrostatic self-assembly of Ag nanospheres. The composites produce numerous hotspots due to the abundant plasmonic nanogaps, including the interstitial space between the Ag nanostar and Ag nanospheres, as well as internanogaps between neighboring Ag nanospheres, resulting in outstanding SERS performance. It was successfully applied for the quantitative and simultaneous detection of diquat and thiram in fruit juice, achieving detection limits of 5.0 × 10 −8 mol/L and 1 × 10 −8 mol/L, respectively, with recovery rates ranging from 86.6 % to 118.4 %. Notably, under UV light exposure, the composite was able to degrade pesticides efficiently within 80 min. Additionally, its reusability was demonstrated by sustaining strong SERS activity over five continuous detection cycles. These results emphasize the capability of Ag NS/ZIF-8/Ag composites for sensitive pesticide detection via SERS.
研究领域:
分析化学
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纳米技术
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表面科学
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环境监测
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Zichen Tang,Shengchen Lv,Donghui Liu,Xueke Liu,Zhiqiang Zhou,Peng Wang
Pesticide residues are currently a prominent concern for food safety, and the development of a rapid, convenient, and accurate method for detecting pesticide residues is crucial to ensure the quality of agricultural products. In this study, a small molecule fluorescent probe based on biphenyl disulfonic acid (BDSA) was designed and prepared, and a sensitive, specific, and rapid detection method for diquat (DQ) and paraquat (PQ) was developed. The fluorescent molecule (BDSA-NDA) was synthesized through amide reaction between BDSA and 1,8-naphthalic anhydride, which exhibited cyan fluorescence (480 nm) when excited at 305 nm in aqueous solution with a large Stokes shift (>150 nm). Diquat and paraquat were found to quench the fluorescence of the probe through internal filtration effect (IFE) and photoelectron transfer (PET). Moreover, diquat possessed a large conjugated structure that emitted fluorescence at 340 nm which was assembled into a pair of ratio fluorescence with BDSA-NDA. Under optimized experimental conditions, the developed method achieved detection limits of 0.003 mg/L for diquat and 0.202 mg/L for paraquat. Furthermore, it could identify paraquat doped in diquat formulations. Additionally, when applied to environmental water samples as well as rice and urine, this detection method demonstrated good recovery rates (water: 96.2–100.6 %, rice: 93.5–101.9 %, urine: 96–103.7 %), meeting actual sample detection requirements effectively. This work presents a novel approach for rapidly detecting diquat and paraquat residues which holds practical application value in areas such as pesticide residue analysis in foods, environmental or clinical samples.
研究领域:
分析化学
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环境科学
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食品安全
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
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IF 4.513
Chang Liu,Peng Wang,Zhigang Shen,Xueke Liu,Zhiqiang Zhou,Donghui Liu
In our work, the pH-controlled magnetic solid phase extraction for the determination of paraquat and diquat was introduced firstly. Furthermore, to clarify the mechanism of carboxymethyl-β-cyclodextrin functionalized magnetic adsorbents, we studied the pH-responsive supramolecular interaction between carboxymethyl-β-cyclodextrin (CM-β-CD) and paraquat/diquat by ultraviolet–visible (UV–vis) spectroscopy and nuclear magnetic resonance (NMR) experiment, and the energy-minimized structures were also obtained. Then, the functional group CM-β-CD was modified on the surface of magnetic materials to synthesize the adsorbent. The Fourier transform infrared spectrum (FT-IR) results proved the successful modification of CM-β-CD. Thus, this absorbent was applied for the determination of paraquat and diquat in water. Under the optimal condition, limits of detection (LODs) of paraquat and diquat were 0.8 μg L −1 and 0.9 μg L −1 , relative standard deviations (RSD) and recoveries varied 0.7–4.6% and 86.5–106.6%, respectively. Good recoveries (70.2–100.0%) and low RSD (1.7–9.6%) were achieved in analyzing spiked water samples. Furthermore, with the capillary electrophoresis (CE) as the analyser, the whole analytical process did not need the attendance of organic solvents .
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Bing Wang,Zibo Yin,Jusong Liu,Cheng Tang,Yunfei Zhang,Lanying Wang,Hanzeng Li,Yanping Luo
Diquat (DQ), a contact herbicide extensively utilized in both agricultural and nonagricultural domains, exhibits a high correlation with neuronal disorders. Nevertheless, the toxicity and underlying mechanisms associated with exposure to environmental concentrations of DQ remain ambiguous. Here, we report dose-dependent cellular neurotoxicity of DQ in Caenorhabditis elegans. First, DQ significantly compromised the development and brood size of worms, shortened the lifespan, and caused epidermal abnormalities. An unbiased transcriptomic analysis disclosed several pathways related to cell death and peroxisome homeostasis underlying this organismal-level toxicity. Moreover, exposure of DQ to C. elegans led to a notable increase of embryonic cell death. Concurrently, DQ exposure specifically caused the loss of dopamine neurons but not two other types of neurons in adulthood, which is in accordance with DQ-induced muscle-related defects such as pharyngeal pumping, body bends, and head thrashes. Mechanistically, DQ exposure induces the generation of reactive oxygen species (ROS) and enhances glutathione-related ROS scavenging pathway. Protein levels and activities of mitochondrial electron transport chain complexes were specifically impaired in the DQ-treated worms. Collectively, this study suggests an ROS-mediated cell death pathway involving the neuronal and behavioral toxicity of DQ, which offers a novel mitochondria-related perspective to elucidate the general toxicity caused by a widely distributed herbicide, DQ, at near-environment concentrations.
研究领域:
神经科学
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毒理学
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分子生物学
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细胞生物学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Jiafeng He,Xian Li,Jumei Li
Here, we demonstrate a reliable surface-enhanced Raman scattering (SERS) substrate composed of graphene oxide (GO) nanosheets and Ag nanocubes for sensitive detection of varied organic contaminants , malachite green, methylene blue and crystal violet by a portable Raman spectrometer with the limits of detection (LODs) of 10 −9 , 10 −10 and 10 −9 M, respectively, owing to a synergistic SERS enhancement arising from electromagnetic field effect of Ag nanocubes and chemical enhancement of GO sheets. The SERS substrates also present highly uniform signal over substrates and low relative standard deviations of 6.53 %, 6.16 % and 6.70 %, respectively are obtained on each sample, which is attribute to the extremely uniform size of Ag nanocubes as well as the consistent distribution of Ag nanocubes on GO sheets. Moreover, the SERS substrate is capable of label-free detection of more complex organic pesticides such as tetramethylthiuram disulfide and diquat dibromide with the LOD of 10 −8 M, which is below the safety levels regulated by United States Environmental Protection Agency. Consequently, the Ag nanocubes/GO composites are promising as efficient SERS platforms for reliable and highly sensitive monitoring of food safety and environmental pollution .
研究领域:
纳米技术
·
分析化学
·
环境科学
·
材料科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Huimin Xu,Keren Xiao,Qiaojuan Zhang,Kunlun Huang,Gang Song,Zhiyi Yao
In this work, we report a novel fluorimetric sensing system for the visual and rapid detection of bipyridylium herbicides (paraquat and diquat) using a polyelectrolyte-induced nanoassembly strategy in 100% aqueous media. This approach relies on the formation of supramolecular assemblies between a pyrenyl probe (N,N,N-trimethyl-4-(pyren-1-yl)butan-1-aminium bromide, PyBTA) and a polyelectrolyte (poly(4-styrenesulfonic acid), PSS), which could promote paraquat complexation by the synergy of noncovalent forces such as electrostatic and π–π stacking interactions. Compared with the traditional direct recognition method, the proposed method shows a 500-fold higher sensitivity, and the detection limit is as low as 40 nM. This assay can be performed within 15 s and can be observed by the naked eye with a visual detection limit of 0.5 μM. Excellent selectivity for paraquat and diquat is demonstrated by a comparison with other pesticides and common ions. This method can be applied to monitor paraquat concentrations in vegetable and soil samples. This approach was validated by paraquat spiking experiments at multiple levels (recovery: 101.2%–104.1%; relative standard deviation (RSD): 2.3%–6.1%; uncertainty: 0.014–0.035). To the best of our knowledge, this is the first pyrenyl nanoassembly system constructed for detecting bipyridylium herbicides in aqueous solution. We believe the present work will not only broaden the scope of polyelectrolyte-induced nanoassembly based sensors but also provide important information for the design of novel synergistic methods for rapid detection technology.
研究领域:
分析化学
·
环境科学
·
材料科学
·
传感器与执行器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）