JOURNAL OF PHYSICAL CHEMISTRY B
·
2016
·
IF 3.187
Bijun Liu,Lan Dong,Qianhong Yu,Xingliang Li,Fengchang Wu,Zhaoyi Tan,Shunzhong Luo
Glyphosate [N-(phosphonomethyl)glycine] has been described as the ideal herbicide because of its unique properties. There is some conflicting information concerning the structures and conformations involved in the protonation process of glyphosate. Protonation may influence the chemical and physical properties of glyphosate, modifying its structure and the chemical processes in which it is involved. To better understand the species in solution associated with changes in pH, thermodynamic study (potentiometry, calorimetry and NMR spectroscopy) about the protonation pathway of glyphosate is performed. Experimental results confirmed that the order of successive protonation sites of totally deprotonated glyphosate is phosphonate oxygen, amino nitrogen, and finally carboxylate oxygen. This trend is in agreement with the most recent theoretical work in the literature on the subject ( J. Phys. Chem. A 2015,, 119, 5241−5249). The result is important because it confirms that the protonated site of glyphosate in pH range 7–8, is not on the amino but on the phosphonate group instead. This corrected information can improve the understanding of the glyphosate chemical and biochemical action.
研究领域:
化学
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环境科学
·
生物学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xueli Luo,Gengli Huang,Xiaokai Chen,Jie Guo,Weixia Yang,Wenzhi Tang,Tianli Yue,Zhonghong Li
Developing superior adsorbents to remove pollutants from aqueous solution is increasingly becoming urgent with respect to grave water pollution and public health consequences. Herein, a metal organic framework (MOFs)-decorated shapeable aerogel (CS-CNC@UiO-66-NH 2 ) prepared by in situ growth of Zr-MOF (UiO-66-NH 2 ) on chitosan/cellulose nanocrystal (CS-CNC) hybrid aerogel at room temperature was developed to remove glyphosate (Gly) from water. The aerogel possessed highly porous structure and excellent water stability upon introduction of cellulose nanocrystals extracted from cotton. Besides, the loading ratio of UiO-66-NH 2 of the proposed ambient growth strategy (37.72%) was higher than conventional solvothermal method (10.91%) because of the structure integrity of polysaccharide aerogels at room temperature. Further, the BET area and porosity of CS-CNC@UiO-66-NH 2 aerogel increased from 21.65 m 2 g −1 to 231.60 m 2 g −1 and 87.47–93.03% due to the synergy of UiO-66-NH 2. Owing to these virtues, the separation-free aerogel exhibited a high adsorption capacity of 133.7 mg/g in batch adsorption and displayed high recyclability over four consecutive adsorption-desorption cycles. Moreover, the Zr-OH/oxygen-containing moieties of the aerogel, electrostatic attraction and hydrogen-bonding accounted for driving Gly adsorption. Considering practical application, the aerogels were packed in glass column for fixed-bed test which revealed that the aerogels could decontaminate Gly with column adsorption capacity of 44.99 mg/g. Consequently, the CS-CNC@UiO-66-NH 2 aerogel with highly porous structure exhibited good Gly adsorption and simple separation, offering a novel strategy to synchronously improve adsorption capacity of polysaccharide-based adsorbent and MOFs shaping for pollutant removal .
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Fei Qu,Han Wang,Jinmao You
Herein, a new type of coordination polymer networks (CPNs), where both of 2,6-Pyridinedicarboxylic acid (DPA) and guanylate monophosphate (GMP) chelate with Eu 3+ , are firstly synthesized (GMP/Eu/DPA). After mixing with GMP/Tb CPNs, a novel ratiometric dual lanthanide nanoprobe is constructed. Alkaline phosphohydrolase (ALP) specifically induces the cleavage of phosphate ester group in GMP. Therefore, the addition of ALP causes the fluorescence quenching of GMP/Tb, and then the emissions of GMP/Eu/DPA enhance as the result of the formation of Eu/DPA complexes. Glyphosate, as an organophosphorus pesticide, can vehemently inhibit the catalytic activity of ALP, so a ratiometric detection of glyphosate can be achieved with a linear range from 0.015 to 8.45 μg/mL. The present strategy also shows good recoveries for measuring glyphosate in rice, millet, soybean, milk, tap water, and mountain spring water, suggesting a great potential for applications in foods.
研究领域:
分析化学
·
食品科学
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环境科学
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DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Qin Yingfeng,Huang Ruiqi,Ye Gao-Jie
The analysis of glyphosate is essential to agricultural production, environment protection and public health. Herein, we proposed a fast and convenient “on-off-on” fluorescence platform for sensitive detection of glyphosate via Cu2+ modulated g-C3N4 nanosheets. The fluorescence of the system was quenched by Cu2+. With the presence of glyphosate, the fluorescence could be restored due to the formation of Cu2+- glyphosate complex. The proposed method was cost-effective with label-free and enzyme-free. Moreover, it exhibits high sensitivity with a low detection limit of 0.01 μg/ml. Furthermore, the proposed method has been successfully monitored glyphosate in real samples.
研究领域:
农业科学
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环境科学
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分析化学
·
公共卫生
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Weikai Ding,Yingying Shangguan,Yuqing Zhu,Yousef Sultan,Yiyi Feng,Bangjun Zhang,Yang Liu,Junguo Ma,Xiaoyu Li
Microcystin-LR (MC-LR) and glyphosate (GLY) have been classified as a Group 2B and Group 2A carcinogens for humans, respectively, and frequently found in aquatic ecosystems . However, data on the potential hazard of MC-LR and GLY exposure to the fish gut are relatively scarce. In the current study, a subacute toxicity test of zebrafish exposed to MC-LR (35 μg L −1 ) and GLY (3.5 mg L −1 ), either alone or in combination was performed for 21 d. The results showed that MC-LR or/and GLY treatment reduced the mRNA levels of tight junction genes ( claudin-5 , occludin , and zonula occludens-1 ) and altered the levels of diamine oxidase and D-lactic, indicating increased intestinal permeability in zebrafish. Furthermore, MC-LR and/or GLY treatment remarkably increased the levels of intestinal IL-1β and IL-8 but decreased the levels of IL-10 and TGF-β, indicating that MC-LR and/or GLY exposure induced an inflammatory response in the fish gut. MC-LR and/or GLY exposure also activated superoxide dismutase and catalase , generally upregulated the levels of p53 , bax , bcl-2 , caspase-3 , and caspase-9 , downregulated the levels of caspase-8 and caused notable histological injury in the fish gut. Moreover, MC-LR and/or GLY exposure also significantly altered the microbial community in the zebrafish gut and the expression of miRNAs (miR-146a, miR-155, miR-16, miR-21, and miR-223). Chronic exposure to MC-LR and/or GLY can induce intestinal damage in zebrafish, and this study is the first to demonstrate an altered gut microbiome and miRNAs in the zebrafish gut after MC-LR and GLY exposure.
研究领域:
毒理学
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环境科学
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分子生物学
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鱼类生物学
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微生物学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xiaoping Wang,Yunjiang Gong,Jiayuan Qin,Jun Cheng,Cheng Gong,Debin Jiang
The cyclic utilization of industrial waste salt can not only solve its environmental pollution problem but also reclaim the available resources. The deep removal of organic pollutants is one of the main challenges for the reuse of waste salt. In this study, dielectric barrier discharge (DBD) plasma is used to remove organic pollutants from simulated industrial waste salt containing glyphosate . Experimental results indicate that DBD plasma can reduce deeply the content of organic matters in waste salt. The decrease of total organic carbon (TOC) is affected by discharge voltage, gas flow rate, initial TOC and water content. For the simulated waste salt with an initial TOC content of 48.1 mg/kg, the finial TOC content decreased to 9.5 mg/kg after a 25 min DBD plasma treatment at the discharge voltage of 14.0 kV, the water content of 10%, and the air flow rate of 0.5 L/min. The maximum energy efficiency of TOC removal is 116.5 mg/(kW.h). A reaction mechanism of refining of the waste salt was proposed based on the detection and analysis of the degradation intermediates and mineralized products. The results of this study show that non-thermal plasma can be used to refine the organic matter contained waste salt with no production of waste water, which has a good prospect of research and application.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2398
·
IF 4.6
Meng Wang,Jun Qiu,Chennuo Zhu,Yunyan Hua,Jie Yu,Lulu Jia,Jianhong Xu,Jianlin Li,Qianjin Li
Due to the massive use and abuse of pesticides, practices which have led to serious threats to human health, the research community must develop on-site and rapid detection technology of pesticide residues to ensure food safety. Here, a paper-based fluorescent sensor, integrated with molecularly imprinted polymer (MIP) targeting glyphosate, was prepared by a surface-imprinting strategy. The MIP was synthesized by a catalyst-free imprinting polymerization technique and exhibited highly selective recognition capability for glyphosate. The MIP-coated paper sensor not only remained selective, but also displayed a limit of detection of 0.29 µmol and a linear detection range from 0.5 to 10 µmol. Moreover, the detection time only took about 5 min, which is beneficial for rapid detection of glyphosate in food samples. The detection accuracy of such paper sensor was good, with a spiked recovery rate of 92–117% in real samples. The fluorescent MIP-coated paper sensor not only has good specificity, which is helpful to reduce the food matrix interference and shorten the sample pretreatment time, but it also has the merits of high stability, low-cost and ease of operation and carrying, displaying great potential for application in the on-site and rapid detection of glyphosate for food safety.Keywords:molecular imprinting;paper sensor;glyphosate;pesticide residues;rapid detection
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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
You-Ping Jin,You Lu,Yue Gao,Qing Li
The sensitive and selective detection of glyphosate (Gly) in the environment is urgently need because it has significant implications for human health and environmental safety. In this work, a GSH-AuNCs/Cu 2+ sensing probe was fabricated via the coordination between Cu 2+ and GSH-AuNCs, which resulted in the suppression of the fluorescence of GSH-AuNCs. Glyphosate can competitively grasp Cu 2+ from GSH-AuNCs/Cu 2+ , leading to fluorescence recovery. Thereby, a simple and sensitive “turn-on” fluorescence strategy was developed for the quantitative detection of glyphosate. The linear range of glyphosate detection is 0.25 ∼ 1.25 μM, with a detection limit of 92.16 ng/mL. This method was demonstrated selectivity, fast response, and sensitivity, making it suitable for the quantitative determination of glyphosate in real water samples. Furthermore, a paper-based test strip was constructed using the sensing probe, which enabled on-site visual and semiquantitative detection of Gly. Overall, our strategy provides new opportunities for determination of organophosphorus pesticides in the environment.
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高影响因子
CELLULOSE
·
2024
·
IF 4.9
Gu Jie,Yi Wenbo,Liu Xinru,Ru Yue,Tan Liping,Liu Tongjun
Research on the use of nanoparticles for pollutant adsorption has received increasing attention. However, there are problems with the recovery and persistence of nanoparticles in pollutant removal processes. Herein, ferric hydroxide-bacterial cellulose (BC) nanocomposites with high porosity were synthesized via in situ mineralization and employed to efficiently remove glyphosate from wastewater. The prepared BC@Fe(OH) 3 nanocomposites were comprehensively characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, which indicated that the Fe(OH) 3 nanoparticles were well positioned on the surface of BC, and the specific surface area of the BC@Fe(OH) 3 nanocomposites reached 179.14 m 2 g −1 , with a pore volume and average pore diameter (0.766 m 2 g −1 and 21.6 nm) much larger than those of pristine BC (0.412 m 2 g −1 and 12.6 nm) and unsupported Fe(OH) 3 (0.016 m 2 g −1 and 20.7 nm). Batch adsorption experiments revealed that the synthesized BC@Fe(OH) 3 nanocomposites had better adsorption performance than unsupported Fe(OH) 3 and pristine BC; the maximum glyphosate adsorption capacity was 180.48 mg g −1 according to the fitting results of the Langmuir adsorption isotherm. We also investigated the kinetics and adsorption mechanism of glyphosate on BC@Fe(OH) 3 . The results showed that the adsorption of glyphosate involved multiple physical and chemical processes, such as electrostatic interactions, ligand exchange, hydrogen bond formation, and pore diffusion. Moreover, this material showed a high reuse rate and maintained approximately 50% of its adsorption capacity after four consecutive adsorption–desorption cycles. Thus, BC@Fe(OH) 3 nanocomposites are expected to be promising, eco-friendly adsorbents for effectively removing glyphosate from wastewater.
研究领域:
环境科学
·
材料科学
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纳米技术
·
水处理
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Biao Yan,Jian Han,Yumiao Sun,Lei Lei,Jing Yuan,Zhixian Qiao,Jun Men,Xin Wang,Yongyong Guo,Qidong Wang,Bingsheng Zhou
Glyphosate (GLY) contamination widely occurred in aquatic environments including aquaculture systems and raised hazard to aquatic organisms such as fish. Probiotics have been reported to alleviate contaminants-induced toxicity. However, whether probiotics could reduce the health risk of GLY to fish remain unknown. Here we investigated the impacts of GLY on crucian carp ( Carassius auratus ) by focusing on the protective roles of two commonly used aquaculture probiotics, Bacillus coagulans (BC) and Clostridium butyricum (CB). Exposure to GLY significantly caused growth retardation and reduced visceral fat and intestinal lipase activity in crucian carp. 16S rRNA sequencing indicated that dysbiosis of Bacteroidetes at phylum level and Flavobacterium at genus level might be primarily responsible for GLY-induced negative growth performance. High throughput targeted quantification for metabolites revealed that GLY changed intestinal metabolites profiles, especially the reduced bile acids and short-chain fatty acids. However, the addition of BC or CB effectively attenuated the adverse effects above by remodeling the gut microbiota composition and improving microbial metabolism. The present study provides novel evidence for ameliorating the harmful effects of GLY on fish species by adding probiotics, which highlights the potential application of probiotics in reducing the health risks of GLY in aquatic environment.
研究领域:
水产养殖学
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环境毒理学
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微生物学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yijie Wang,Xudong Wu,Dan Chen,Linqian Hou,Dezhi Yang,Hong Li,Yaling Yang
The rapid and sensitive detection of glyphosate herbicide in agricultural products is urgent need. Herein, we develop a photosensitive Fe 3 O v -Mo/P nanozyme with defect-rich rough surface by the co-precipitation method. In particular, the Fe 3 O v -Mo/P nanozyme with high-percentage oxygen vacancy (OV) defects and rough surface exhibited superior peroxidase (POD)-like activity and kinetics. More intriguingly, Fe 3 O v -Mo/P nanozyme with strong optical absorption in near-infrared (NIR) region showed excellent light-promoted POD-like activity. It was found that the defect-rich rough surface is conducive to the adsorption of glyphosate to inhibit the POD-like activity of Fe 3 O v -Mo/P. Under near-infrared laser irradiation, the inhibitory effect of glyphosate on the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe 3 O v -Mo/P was increased by 2.64 times. A colorimetric platform was developed for the detection of glyphosate with a low detection limit of 0.032 mg L -1 and good selectivity. The method was used to determine the residual glyphosate in coffee, and the recovery efficiency was between 91.20–104.00 %. This work that combines the advantage of defect engineering and NIR provides a strategy for developing high-active nanozyme in pesticide assay.
研究领域:
分析化学
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环境科学
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生物技术
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 28
·22312-22323
·
IF 6.7
Peng Huajie,Gao Di,Xiao Zhengyue,Yue Zhixiang,Xu Peng,Qiu Ping
Compared with natural-enzyme-based detection strategies,
nanozymes
offer notable advantages in stability, environmental tolerance, and
cost-effectiveness. In this study, we designed and synthesized a Pt@Fe-MIL-88
composite with both oxidase (OXD)-like activity and intrinsic fluorescence.
The material efficiently catalyzes 3,3 ′ ,5,5 ′ -tetramethylbenzidine
(TMB) oxidation, generating a color change while quenching its fluorescence.
Glyphosate (Gly) specifically inhibits the OXD-like activity of Pt@Fe-MIL-88,
reducing oxTMB production and thereby alleviating fluorescence quenching,
enabling dual colorimetric and fluorometric signal readout. The inhibition
mechanism was elucidated through FTIR, XRD, XPS characterization,
molecular dynamics simulations, and DFT calculations. Accordingly,
a natural-enzyme-free, colorimetric-fluorometric dual-mode sensing
platform for Gly was established. The platform exhibits high sensitivity,
excellent selectivity, and strong anti-interference capability, with
accuracy and reliability validated by spike recovery tests in real
samples. This work presents a new strategy for developing stable,
rapid, and low-cost multimodal detection methods for pesticide residues.
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高影响因子
危险品化学品经营许可证（带存储）