Nano Research
·
2024
·
IF 9.5
Lu Qianqian,Xu Xinxin,Qu Aihua,Liu Liqiang,Li Yuzhe,Sun Maozhong,Xu Chuanlai,Kuang Hua
Herbicide residues in agricultural products can have adverse effects on the environment and human health, therefore, there is an urgent need to establish a sensitive, rapid, and wide-ranging detection method. In this study, haptens of phenylurea herbicides (PUs) and sulfonylurea herbicides (SUs) were analyzed and designed based on computational simulation techniques, and two high-performance broad-spectrum monoclonal antibodies against PUs and SUs were prepared. On this basis, a multi-colloidal gold immunochromatography assay (multi-CGIA) was developed to simultaneously detect 13 herbicides in wheat. The visual limit of detection (vLOD) for PUs including diuron, chlortoluron, neburon, chlorbromuron, and linuron was 1–2 µg/kg. The vLOD for SUs including metsulfuron methyl, ethametsulfuron-methyl, sulfometuron-methyl, tribenuron methyl, cinosulfuron, triasulfuron, chlorimuron-ethyl, and chlorsulfuron was 2–10 µg/kg. The results of real sample determination indicated that the multi-CGIA is accurate, stable, and reliable, and adaptable to on-site preliminary screening of actual samples.
研究领域:
分析化学
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 14
·期 4
·460-468
·
IF 2.896
Feng Ji,Zhao Zhe,Li Jilong,Shan Zhenhua,Yang Yi,Wang Zhibing,Zhang Hanqi
Vortex-assisted dispersive liquid–liquid microextraction based on the solidification of sedimentary deep eutectic solvents was developed and applied to the extraction of triazine and phenylurea herbicides in milk samples. In this study, a series of novel hydrophobic deep eutectic solvents were prepared using tetrabutylammonium chloride as the hydrogen bond acceptor and perfluorooctanol as the hydrogen bond donor, and their structures, viscosities, densities and melting points were determined. The deep eutectic solvent was used as the extraction solvent and dispersed in the sample solution with the assistance of vortex. After extraction, through centrifugation and subsequent cooling in an ice bath, the deep eutectic solvent was solidified and deposited on the bottom of the centrifuge tube. Subsequently, the deep eutectic solvent combined with the target analytes was diluted and used for chromatographic analysis. Some parameters, including the extraction temperature, type and volume of the deep eutectic solvent, amount of NaCl, vortex time and pH of the sample solution, were optimized by the single-factor experiment, Plackett–Burman design and Box–Behnken design. The limits of detection and quantification were in the range of 0.41–0.59 μg L−1 and 1.37–1.95 μg L−1, respectively. The intra-day precision and inter-day precision were in the range of 0.28–2.14% and 2.02–7.99%, respectively. The present method was successfully applied to the determination of triazine and phenylurea herbicides in milk samples.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
YueYue Zhang,Jinjuan Wang,Ang Yu,Yuanfei Wu,Xiaojia Huang
Efficient extraction is an essential and challenging step in the simultaneous monitoring of the commonly used phenylureas (PUs) and sulfonylureas (SUs) in complex matrices. For this purpose, a new magnetic adsorbent based on fly ash (MAFA) was prepared through simple one-pot strategy without the application of organic solvent. The pre-treated fly ash, FeCl 3 and FeCl 2 were dissolved in water, and then the mixture reacted to form MAFA by means of simple one-pot hydrothermal technology for 2.5 h. The structure, morphology, spectroscopic, charged and magnetic properties were inspected by various characterized techniques. Combining the magnetic solid phase extraction (MSPE) format, the obtained MAFA presented satisfactory co-extraction performance towards PUs and SUs. The relevant adsorption process and behavior were well fit for Freundlich adsorption model and pseudo-second-order kinetics. After the optimization of extraction parameters, sensitive, reliable and practicable method for the simultaneous monitoring of studied PUs and SUs in aqueous and soil samples was developed by the combination of MAFA/MSPE and HPLC. The established method displayed high sensitivity (limits of detection were 0.0027–0.011 μg/L and 0.041–0.20 μg/kg for water and soil samples, respectively), good spiked recoveries (81.7–113 % and 81.0–114 % for water and soil samples, respectively) and excellent precision (RSDs did not higher than 9.2 %). Furthermore, approach accuracy was confirmed by means of confirmatory experiments.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jun Wu,Wenzhong Zhang,Chunping Li,Erdan Hu
The effects of Fe(III) and Cu(II) on the sorption of atrazine (AT) and prometryn (PY) on clay minerals were investigated both preloaded and in solution. For smectite , Fe(III) preloading greatly enhanced AT and PY sorption at pH 4.0 and 6.0 but diminished AT sorption at pH 8.0. Cu(II) preloading promoted AT and PY sorption under alkaline conditions but suppressed AT sorption at pH 4.0. The adverse effects were not obvious for PY. While for illite and kaolinite , Fe(III) and Cu(II) had little or promotion effects due to the lower contents of them in these two minerals. In the co-sorption studies, for smectite, AT sorption remained at pH 4.0 and increased at pH 6.0 and 8.0, while PY sorption was inhabited over the pH range of 4.0–8.0 in the presence of Fe(III). AT and PY sorption were not affected by Cu(II) except for PY at pH 8.0, in which case, the sorption was promoted. For illite and kaolinite , Fe(III) and Cu(II) generally enhanced AT and PY sorption.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Xuexia Zhu,Yunfei Sun,Xingxing Zhang,Hailu Heng,Haihong Nan,Lu Zhang,Yuan Huang,Zhou Yang
The extensive application of herbicides has led to a serious threat of herbicide contamination to aquatic ecosystem . Herbicide exposure affects aquatic communities not only by exerting toxicity on single species but also by changing interspecific interactions . This study investigated the antigrazer defenses of the common green alga Scenedesmus obliquus against different herbicides [glyphosate, 2,4-dichlorophenoxyacetic acid (2,4-D), and atrazine] at various concentrations (0–2.0 mg L −1 ). In the presence of grazer ( Daphnia )-derived cues, S. obliquus populations without herbicides formed high proportions of multicelled (e.g., four- and eight-celled) colonies. This result confirms that S. obliquus exhibits a morphological defense against grazing risk. At the low concentration range of 0.002–0.02 mg L −1 , the three herbicides exerted no influence on the growth and photosynthetic efficiency of S. obliquus , and multicelled colonies showed constant proportions. At the high concentration range of 0.20–2.0 mg L −1 , atrazine significantly inhibited the algal growth and photosynthesis whereas glyphosate or 2,4-D did not. Nonetheless, these levels of glyphosate or 2,4-D remarkably decreased the proportion of multicelled colonies, with reduced numbers of cells per particle in Daphnia filtrate-treated population. No eight-celled colony was formed after treatment with atrazine at 0.20–2.0 mg L −1 despite the addition of Daphnia filtrate. These results suggest that herbicide exposure impairs antigrazer colonial morphs in phytoplankton although it is not sufficient to hamper algal growth. This phenomenon can increase the risk of predation by herbivores, thereby disrupting the inducible phytoplankton community. Furthermore, the predator-prey interactions between herbivores and phytoplankton can be potentially changed more seriously than previously considered.
研究领域:
生态学
·
水生生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Yinglu Chen,Yitao Yan,Jie Chen,Ben Zheng,Youwei Jiang,Zhengzhong Kang,Jun Wu
Given the prevalence of the malignant weed Chinese Sprangletop (Leptochloa chinensis (L.) Nees) in rice fields, the development of novel herbicides against this weed has aroused wide interest. Here, we report a novel diphenyl ether-pyrimidine hybrid, DEP-5, serving as a systematic pre/postemergence herbicide candidate for broad-spectrum weed control in rice fields, specifically for L. chinensis. Notably, DEP-5 exhibits over 80% herbicidal activity against the resistant biotypes even at 37.5 g a.i./ha under greenhouse conditions and has complete control of L. chinensis at 150 g a.i./ha in the rice fields. We uncover that DEP-5 acts as a noncompetitive inhibitor of acetohydroxyacid synthase (AHAS) with an inhibition constant (Ki) of 39.4 μM. We propose that DEP-5 binds to AHAS in two hydrophobic-driven binding modes that differ from commercial AHAS inhibitors. Overall, these findings demonstrate that DEP-5 has great potential to be developed into a herbicide for L. chinensis control and inspire fresh concepts for novel AHAS-inhibiting herbicide design.
研究领域:
植物学
·
农业科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 39
·18839-18847
·
IF 3.925
Hongxia Chen,Haiyan Yan,Peiyu Cao,Yufeng He,Pengfei Song,Rongmin Wang
Semicoke (SC) is a kind of powder of industrial by-products that easily cause environmental pollution due to the presence of stable organic matter in clay minerals. In this work, a porous magnetic semicoke-based geopolymer (MSC-GP) was prepared using SC as the raw material. Then, 2-methyl-4-chlorophenoxyacetic acid (MCPA), a typical herbicide, was loaded into the porous MSC-GP and composited with sodium alginate (SA) using calcium as a crosslinking agent, which afforded MSC-GP/SA encapsulating MCPA (MCPA@MSC-GP/SA). The structure and micromorphology of SC, SC-GP and MCPA@MSC-GP/SA were characterized by FT-IR spectroscopy, TG-DTG, SEM and EDS. After measuring the swelling behavior in water and saline solutions, the water retention capacity, pH effect, degradation efficiency, site-specific targeted release, recovery, slow-release behavior, and pot experiments of MCPA@MSC-GP/SA were assessed. This indicated that the water retention capacity of soils was improved by the addition of MCPA@MSC-GP/SA. The release rate of the herbicide in MCPA@MSC-GP/SA was 65.2% in 90 days, which indicated that MCPA@MSC-GP/SA possessed a higher utilization efficiency and control of weeds compared to traditional herbicide. In summary, this study opens up a new avenue for improving the utilization efficiency of SC and prolonging the duration of herbicide action, which may have potential applications in agricultural production.
研究领域:
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Xin Wu,Zili Yang,Chunlin Song,Mengwei Bu,Weiguo Li,Jiang Duan,Guang-Fu Yang,Aidong Zhang
Fosmidomycin (FOS) is a natural product inhibiting the DXR enzyme in the MEP pathway and has stimulated interest for finding more suitable FOS analogues. Herein, two series of FOS analogue hydroxamate-containing bisphosphonates as proherbicides were designed, with bisphosphonate replacing the phosphonic unit in FOS while retaining the hydroxamate (BPF series) or replacing it with retro-hydroxamate (BPRF series). The BPF series were synthesized through a three-step reaction sequence including Michael addition of vinylidenebisphosphonate, N-acylation, and deprotection, and the BPRF series were synthesized with a retro-Claisen condensation incorporated into the reaction sequence. Evaluation on model plants demonstrated several compounds having considerable herbicidal activities, and in particular, compound 8m exhibited multifold activity enhancement as compared to the control FOS. The proherbicide properties were comparatively validated. Furthermore, DXR enzyme assay, dimethylallyl pyrophosphate rescue, and molecular docking verified 8m to be a promising proherbicide candidate targeting the DXR enzyme. In addition, 8m also displayed good antimalarial activities.
研究领域:
植物学
·
药理学
·
农业科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Fei Fang,Quankun Lv,Peng Li,Yue Tao,Yan Zhang,Yi Zhou,Xuede Li,Jie Li
Defect engineering is essential for improving the adsorption performance of metal-organic frameworks (MOFs). Herein, hierarchical porous UiO-67(Zr) and analogs with controlled levels of defects were successfully obtained and applied to chemoselectively capture glyphosate (GP) from water. The obtained defective UiO-67 was stable at different pH values. The removal performance of defective UiO-67(Zr) was evaluated systematically as a function of different modulators, water chemistry and interfering ions. The maximum adsorption capacity of defective UiO-67(Zr) reached 322.58 mg/g, superior to most MOFs-based adsorbents. The defective UiO-67(Zr) also showed high selectivity for GP adsorption at high concentrations of humic acids (3 times) and interfering anions (100 times). In addition, the defective UiO-67(Zr) has shown good recovery performance and can effectively remove GP from a variety of contaminated water samples and multi-pollutant systems. The results of batch experiments and microscopic spectral characterization (XPS and FTIR) revealed that GP adsorption was mainly guided by electrostatic action, coordination, pore-filling and hydrogen bonding . These findings verified that the fabrication of defect sites played an important role in promoting the adsorption performance of MOFs. Our work provides a clue to the design of defective MOFs with high adsorption performance.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2021
·Vol. 23
·期 12
·4560-4566
·
IF 10.182
Yunhao Gao,Zhiyuan Zhou,Xi Chen,Yuyang Tian,Yan Li,Huachen Wang,Xuan Li,Xueyang Yu,Yongsong Cao
Volatilization and leaching are two critical pathways for pesticide transportation from their applied areas to non-target regions. Nanocarrier-based formulations can improve the use efficiency and reduce the off-target effects of pesticides, however, the complicated preparation process seriously restricts the large-scale application of nanopesticides in the agricultural field. In this work, taking 2-(2,4-dichlorophenoxy) acetic acid (2,4-D), 2-methyl-4-chlorophenoxyacetic acid (MCPA), and 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) as model herbicides, herbicide-intercalated Zn–Al hydrotalcites (herbicide@HTlcs) were facilely fabricated by a modified co-precipitation method without heating, aging, organic solvents, and inert gas. The obtained herbicide@HTlcs showed high entrapment efficiencies (71.7%–86.7%), a sheet structure with an average size of 339.4 nm, and positive surface charges (+40.5). The volatilities of herbicide@HTlcs were reduced more than 3-fold compared with those of pure herbicides. The release rates of 2,4-D@HTlcs were in line with the selectivity sequence of HTlcs for the anions and controlled by non-Fickian diffusion. The leaching experiments performed in two agricultural topsoils collected from Beijing and Yunnan province and a grassland soil from Neimenggu province all demonstrated that the developed 2,4-D@HTlc nanosheets could evidently retard 2,4-D leaching through the soil. Additionally, 2,4-D@HTlcs exhibited no delay in the control efficacy against Amaranthus retroflexus compared with free 2,4-D sodium salt. This study provides a novel insight into the facile fabrication of controlled release formulations of pesticides that can reduce the volatilization and leaching risks simultaneously.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Jia Tu,Liangliang Xiao,Yingfang Jiang,Qingyuan He,Shiguo Sun,Yongqian Xu
Paraquat (PQ) is one of an effective herbicides but it has extremely toxic effects on animals and humans. It is of great importance to selectively detect PQ with fluorescence response. The first “off–on” fluorescent method based on mechanism of surfactant-controlled aggregate–deaggregate of squaraines (SQ) for paraquat (PQ) recognition in near infrared region was constructed. In this approach, remote-controlled regulation endows unique advantages to fulfill the turn-on response to electron-deficient featured PQ which prefers to quench all reported fluorophores through electron transfer. The assembled system can selectively recognize PQ over other herbicides. The detection limit was calculated to be 95.7 μg L −1 (3.72 × 10 −7 M), which is lower than that of value (200 μg L −1 ) recommended by the US Environmental Protection Agency (EPA). In addition, the system can be used for PQ detection in real sample.
研究领域:
分析化学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2015
·
IF 4.457
Ting Zhou,Nan Song,Hao Yu,Ying-Wei Yang
A layer of synthetic supramolecular macrocycles, that is, perhydroxyl-pillar[5]arene and perhydroxyl-pillar[6]arene, has been covalently attached to hydrophilic silica supports through Si–O–Si linkages with a coverage of up to 250 μmol pillar[5,6]arenes/g to form novel absorbent hybrid materials. Their adsorption toward a typical herbicide, namely, paraquat, from its aqueous solution has been investigated. Kinetic studies disclosed that paraquat adsorption fits a first-order kinetic model. Equilibrium adsorption data could be explained very well by the Langmuir equation. The pillar[6]arene-modified materials showed more obvious adsorption as compared with pillar[5]arene-modified ones and the saturation adsorption quantity reached about 0.20 mmol of paraquat per gram of materials. The entire process of adsorption was endothermic, and significantly an elevated temperature led to an increase in the adsorption quantity. This new type of pillarene-based adsorbent materials can be considered as a potential adsorbent for harmful substances removal from wastewaters.
研究领域:
材料科学
·
环境科学
✓ 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）