JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2020
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IF 3.721
Yujie Zhang,Yunlong Huang,Ling Fu,Jiaoyan Qiu,Zhuqing Wang,Aiguo Wu
Paraquat (PQ) is a kind of herbicide, which is highly toxic to human body. In this work, we proposed a fast and simple detection method for PQ in aqueous samples based on electrostatic interactions between modified gold nanoparticles (Au NPs) and PQ. Au NPs were first modified with sodium 3-mercapto-1-propanesulfonate (Au NPs-3MPS). 3MPS with negative charge can interact with nitrogen atoms of PQ with positive charge via electrostatic force. As a result, Au NPs-3MPS aggregated together. Accordingly, the color of Au NPs-3MPS colloid changed from red to blue-gray, and the UV–vis absorption spectrum changed accordingly. The detection limit of PQ is 0.1 mg/L by naked eyes, and 0.001 mg/L by UV–vis spectroscopy. Moreover, this detection method has good specific selectivity and anti-interference performance, and it has been successfully used for detecting PQ in real environmental samples and fruit juice samples.
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
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 24
·15601-15611
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IF 3.269
Y. Li,R. Zhao,S. Chao,B. Sun,N. Zhang,J. Qiu,C. Wang,X. Li
Organic cationic herbicides have been widely used in modern agriculture and their discharge into the environment has become a serious problem. In this study, magnesium silicate functionalized PAN (MgSi/PAN) fibers were synthesized using an electrospinning technique and a hydrothermal approach, which were explored as attractive adsorbents for cationic herbicide polluted wastewater treatments. The batch adsorption behavior toward the cationic herbicide diquat by MgSi/PAN fibers was investigated, including effects of pH, adsorption kinetics, adsorption isotherms and ionic strength. It was found that the adsorption isotherm of MgSi/PAN composite fibers was fitted better with the Langmuir isotherm model. The adsorption behaviors showed a maximum adsorption capacity of 197.53 mg g−1 for diquat, which was higher than those of many other adsorbents. Kinetics of the diquat adsorption were found to follow a pseudo-second-order rate equation. Meanwhile, the adsorbent had a good recyclability and the removal efficiency remained at 83% after five adsorption–desorption cycles. Most importantly, the MgSi/PAN fibers could remove 99.1% of diquat by dynamic filtration experiment. These findings demonstrate that the MgSi/PAN fiber membranes could be potentially applied to the efficient removal of diquat in wastewater treatment.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Xiang Liang,Jianming Fan,Dong Liang,Yan Xu,Yuqi Zhi,Huiping Hu,Xiaoqing Qiu
In the study, we present a quick potassium hydroxide heat treatment approach to optimize the “melon” framework of graphite carbon nitride and modify the surface properties by functionalization of hydroxyl groups. The hydroxyl groups functionalized g-CN samples have been applied as bifunctional materials for efficient elimination of diquat dibromide herbicide through synergistic adsorption/photodegradation processes. The structural characterizations of the as-obtained samples, combined with the detailed diquat dibromide herbicide adsorption study, reveal that the surface hydroxyl groups are the active sites for the diquat dibromide adsorption, which account for the much enhanced saturation adsorption capacities of 159.3 mg g −1 at 25 °C and pH = 7 (more than 110 times improvement compared with pristine carbon nitride). Furthermore, the grafted surface hydroxyl groups and optimized planar structures endow the functionalized samples with the advantageous properties of efficient photoinduced charge transfer and separation, low interface resistance, and high photoresponse. Consequently, the deep mineralization of diquat dibromide herbicide was achieved over the bifunctional materials (total removal ratios were ~ 97.1% after 240 min visible-light irradiation). This work not only demonstrates the feasibility of hydroxyl groups functionalized graphite carbon nitride for elimination of herbicide pollutants but also offers new insights to better design efficient and durable materials for environmental remediation.
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
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yin-Xia Sun,Bo-Tao Ji,Jiang-Hai Chen,Lu-Lu Gao,Yu Sun,Zhe-Peng Deng,Biao Zhao,Jin-Guo Li
Diquat (DQ) is a typical bipyridine herbicide widely used to control weeds in fields and orchards. The severe toxicity of diquat poses a serious threat to the environment and human health. Metal-organic frameworks (MOFs) have received widespread attention due to their unique physical and chemical properties and applications in the detection of toxic and harmful substances. In this work, a two-dimensional (2D) Tb(III) functionalized MOF Tb(III)@ 1 ( 1 = [Cd(HTATB)(bimb)] n ·H 2 O (Cd-MOF), H 3 TATB = 4,4′,4″-triazine-2,4,6-tribenzoicacid, bimb = 1,4-bis((1H-imidazol-1-yl)methyl)benzene) has been prepared and characterized. Tb(III)@ 1 has excellent optical properties and high water and chemical stability. After the Tb(III) is fixed by the uncoordinated -COO- in the 1 framework, Tb(III)@ 1 emits the typical green fluorescence of the lanthanide ion Tb(III) through the “antenna effect”. It is worth noting that Tb(III)@ 1 can be used as a dual emission fluorescence chemical sensor for the ratio fluorescence detection of pesticide DQ, exhibiting a relatively low detection limit of 0.06 nM and a wide detection range of 0–50 nM. After the addition of DQ, a rapid color change of Tb(III)@ 1 fluorescence from green to blue was observed due to the combined effects of IFE, FRET and dynamic quenching. Therefore, a simple test paper box has been designed for direct on-site determination of pesticide DQ. In addition, the developed sensor has been successfully applied to the detection of DQ in real samples (fruits a Yin-Xia Sun and Bo-Tao Ji contributed equally to this work and should be considered co-first authors.nd vegetables) with satisfactory results. The results indicate that the probe developed in this study has broad application prospects in both real sample detection and actual on-site testing.
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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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Wanru Li,Haiyan Wei,Nianlu Li,Shunyu Li,Yaru Liu,Ranran Liu,Wei Zou,Peishan Hu,Zhihu Zhang,Cuijuan Wang
Rapid detection of diquat (DQ) is essential in clinical diagnosis and rescue. Here, we developed a fast, simple-yet-practical detection strategy for the reliable identification and quantification of DQ in biological fluids. Based on surface-enhanced Raman spectroscopy (SERS), point-of-care detection was realized under the acidic condition with gold nanoparticles as the substrate. Under optimal experimental conditions, the detection limits of the strategy were 17.5 ppb and 1.99 ppm in human urine and gastric juice, respectively. High specificity and selectivity of the SERS strategy were demonstrated using common pesticides and coexisting biological substances. The method was also used to detect biofluids from 5 patients and urine samples from 10 healthy volunteers . The results were in high agreement with spectrophotometric and clinical liquid chromatography-mass spectrometry methods. The volume of urine samples required for this technique is merely 20 μL, and no preparation of the samples is required. Compared to traditional methods used in clinical settings, SERS-based methods are capable of real-time measurements that accurately provide rapid detection and response in non-laboratory settings, with great potential for on-site and point-of-care testing.
研究领域:
分析化学
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医学诊断
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Xin Liu,Shiyue Niu,Bin Yang,Jia Liu,Liqian Niu,Xian Wang,Daqian Song,Shuyun Bi
Ultrasensitive Surface-enhanced Raman spectroscopy (SERS) method for the detection of diquat/dipterex was established using bovine serum albumin (BSA)-protected silver nanoparticles (AgNPs) modified MIL-53(Al) (named as BSA/MIL-53(Al)/AgNPs). Compared with unmodified AgNPs, BSA/MIL-53(Al)/AgNPs significantly enhanced the Raman signals of diquat and dipterex and the enhancement factors (EFs) were 1.58 × 10 7 and 2.34 × 10 7 , respectively. The TEM, XRD, TGA, XPS, UV–vis and FT-IR were utilized to characterize BSA/MIL-53(Al)/AgNPs and the binding of the substrate with diquat/dipterex. The optimal measurement conditions were investigated in detail by single factor experiment and response surface model. The impacts of common pesticides and coexisting substances on the determination of diquat/dipterex were studied. Under optimum conditions, linear calibration curves for detecting diquat/dipterex were established with a limit of detection (LOD) of 0.17/0.89 pmol L −1 (3 S 0 / S ). The SERS approaches were used to detect diquat and dipterex in several fruits and vegetables. The recovery was 97.10 %–104.82 % with the relative standard deviation (RSD) of 1.04 %–4.15 % ( n = 5).
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2015
·Vol. 93
·期 10
·1713-1720
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IF 1.231
Yongmei Hao,Zhongkai Wang,Jiajia Gou,Zhongming Wang
A graphene oxide nanocomposite (GO-Fe 3 O 4 ) was synthesized with a simple and low-cost method. This nanocomposite was characterized by XRD, TEM, FT-IR, TGA, and VSM. Spherical Fe 3 O 4 nanoparticles with an average size of 10 nm were uniformly applied to the surface of graphene oxide sheets. GO-Fe 3 O 4 nanocomposite showed a superparamagnetic characteristic at room temperature and its saturation magnetization was 8.5 A · M 2 /kg. The adsorption behaviour of diquat at the surface of GO-Fe 3 O 4 was investigated, including effects of pH, temperature, and water matrix. The adsorption kinetics, thermodynamics, and adsorption isotherm were also examined. The adsorption was strongly dependent on pH. The adsorption process obeyed the pseudo-second order kinetic model, and the rate-determining step might be chemical sorption. The Langmuir adsorption isotherm model was applicable for describing the adsorption of diquat onto GO-Fe 3 O 4 , and the adsorption capacity was 74.85 mg/g at room temperature. Thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic. Most importantly, the GO-Fe 3 O 4 could remove 96.6 % of diquat from a real water sample when the concentration of diquat is 20 mg/L.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Dongdong Li,Hongyuan Zhao,Guoquan Wang,Jörg Rinklebe,Su Shiung Lam,Runqiang Liu,Lianyang Bai
The excessive diquat (DQ) residue poses a serious hazard to the ecological environment and human health. Herein, a simple, low-cost, and scalable ultrasonication-assisted strategy was proposed to fabricate the composite of Super-P carbon black nanoparticles dispersed palygorskite (Pal) nanofiber , which was employed to construct an electrochemical sensor for DQ determination. The Pal/Super-P/GCE sensor exhibited ultrasensitive determination performance with a low detection limit (0.1514 nM) and high sensitivity (44.141 μA μM −1 ) in the linear DQ concentration range of 0.00050–1.0 μM. The recoveries of the constructed sensor ranged from 95.6 % to 100.3 % when applied to detect DQ in river water, potato, and cucumber. The above enhanced DQ detection performance was primarily due to the synergistic effect of Pal and Super-P. Pal with high adsorption ability and excellent biocompatibility could provide numerous attachment sites for DQ adsorption due to the superior ion-exchange property and plentiful Si-OH on its surface. Super-P with pearl-chain like structure contributed to forming an interconnected conductive network, thus facilitating the homogeneous dispersion of Pal and compensated for the poor conductivity of Pal. This study provides a valuable reference in developing clay-based nanocomposite via ultrasonication-assisted strategy to achieve the application of electrochemical sensor at the ultra-trace levels detection of pesticides.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
FREE RADICAL BIOLOGY AND MEDICINE
·
2020
·
IF 6.17
Xu Zhang,Wei Xiong,Ling-Li Chen,Jia-Qiang Huang,Xin Gen Lei
Selenoprotein V (SELENOV) contains a thioredoxin-like fold and a conserved CxxU motif with a potential redox function. This study was to assess its in vivo and in vitro roles and mechanisms in coping with different oxidant insults. In Experiment (Expt.)1, SELENOV knockout (KO) and wild type (WT) mice (male, 8-wk old) were given an ip injection of saline, diquat (DQ, 12.5 mg/kg), or N -acetyl- para -aminophenol (APAP, 300 mg/kg) (n = 10), and killed 5 h after the injection. In Expt. 2, primary hepatocytes of WT and KO were treated with DQ (0–0.75 mM) or APAP (0–6 mM) for 12 h. In Expt. 3, 293 T cells overexpressing Selenov gene (OE) were treated with APAP (0–4 mM) for 24 h or H 2 O 2 (0–0.4 mM) for 12 h. Compared with the WT, the DQ- and APAP-injected KO mice had higher (P < 0.05) serum alanine aminotransferase activities and hepatic malondialdehyde (MDA), protein carbonyl, endoplasmic reticulum (ER) stress-related proteins (BIP and CHOP), apoptosis-related proteins (FAK and caspase-9), and 3-nitrotyrosine, along with lower total anti-oxidizing-capability (T-AOC) and severer hepatic necrosis . Likewise, the DQ and APAP-treated KO hepatocytes had elevated (P < 0.05) cell death (10–40%), decreased (P < 0.05) T-AOC (63–83%), glutathione (26–87%), superoxide dismutase (SOD) activity (28–36%), mRNA levels of redox enzymes ( Cat , Gcs, Gpx3, and Sod ) and (or) sharper declines (P < 0.05) in cellular respiration and ATP production than that of the WT cells. In contrast, the OE cells had greater viability and T-AOC and lower MDA, and carbonyl contents after the APAP and H 2 O 2 exposures (all at P < 0.05) than the controls. Moreover, the OE cells had greater (P < 0.05) redox enzyme activities (GPX, TrxR, and SOD), and lower (P < 0.05) expressions of ER stress-related genes (Atf4, Atf6, Bip, Xbp1t, Xbp1s , and Chop ) and proteins (BIP, CHOP, FAK, and caspase-9) than the control cells after the treatment of H 2 O 2 (0.4 mM). In conclusion, SELENOV conferred protections in vivo and in vitro against the reactive oxygen and nitrogen species-mediated ER stress-related signaling and oxidative injuries.
研究领域:
生物化学
·
细胞生物学
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药理学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）