SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Wenjie Deng,Yanheng Zhang,Liangheng He,Li Xu,Xulang Ye,Hanhong Xu,Li Zhu,Jinliang Jia
Thrips [ Megalurothrips usitatus (Bagnall)] (Thysanoptera: Thripidae) is a pest that poses a serious challenge to global crop production and food supply, especially to the cowpea industry. Nano-delivery systems have broad application prospects in the prevention and control of pests in agriculture. Herein, three types of amino acid (AA) modified polysuccinimide nano-delivery carriers (PSI-GABA, PSI-ASP and PSI-GLU) were constructed with a diameter of approximately 150 nm to load thiamethoxam (THX), which enhanced THX effective distribution and use with cowpea plants. Significantly, the PSI-GLU nanocarrier effectively delivered THX to cowpea plant tissues following 6 h of soil application. Compared with commercial THX suspension (SC), the THX content in the leaves of cowpea plants was increased by 2.3 times. Confocal laser scanning microscopy revealed that the FITC-labeled PSI-GLU nanocarrier reached the leaves through the vascular system after being absorbed by the roots of cowpea plants. The PSI-GLU nanocarrier decreased the LC 50 of THX from 11.45 to 7.79 mg/L and significantly enhanced the insecticidal effect. The PSI-GLU nanocarrier also improved the safety of THX to worker bees at 48 h, and moreover showed a growth-promoting effect on cowpea seedlings. These results demonstrated that the PSI-GLU nano-delivery carrier has promising uses on improving the effective utilization of THX for the sustainable control of thrips and reducing the risk to non-target pollutions.
研究领域:
农业科学
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昆虫学
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植物保护
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 8
·570
·
IF 4.3
Lin Pan,Shuai Qu,Longfei Liu
The excessive levels of neonicotinoid insecticides, particularly thiacloprid (THI), in the environment have become a significant threat to ecosystems. This study investigates the catalytic degradation of THI using pinewood biochar (PBC), zero-valent iron (ZVI), and ZVI/PBC composite, with a particular focus on the reaction activity modulation mediated by organic acids (humic acid: HA and oxalic acid: OA). Reductive dechlorination dominated THI degradation as observed by Cl−release kinetics. Compared to HA (39.73%), the OA (73.44%) addition markedly increased the THI removal efficiency by ZVI/PBC, which alone has a lower removal efficacy, i.e., 37.29%. The increase in the THI removal rate was attributed to its enhanced electron transfer capacity. As confirmed by electrochemical characterization, the addition of organic acids promotes electron transfer between THI and catalysts (ZVI, PBC, or ZVI/PBC), thereby improving the removal efficiency of THI. XRD/XPS analyses elucidated that OA preferentially converted passivating Fe2O3/Fe3O4on ZVI/PBC to reactive FeOOH and formed electron-conductive Fe–COO bonds, thereby suppressing oxide layer formation. PBC amplified these effects through ZVI dispersion and electron shuttling, reducing aggregation-induced activity loss. These findings provide a mechanistic framework for optimizing ligand-engineered iron composites, offering practical strategies to enhance pesticide remediation efficiency in organic acid-rich environmental systems.
研究领域:
环境科学
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土壤修复
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农药污染治理
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 4
·788
·
IF 4.324
Asem Elabasy,Ali Shoaib,Muhammad Waqas,Zuhua Shi,Mingxing Jiang
Using smart nanopesticide formulations based on nanomaterials can offer promising potential applications for decreasing pesticide residues and their effects on human health and the environment. In this study, a novel nanoformulation (NF) of thiamethoxam (TMX) was fabricated using the solvent evaporation method through loading TMX on cellulose nanocrystals (CNCs) as the carrier. The synthesized TMX-CNCs was investigated through different techniques, such as Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), and thermogravimetric analysis (TGA). The results revealed that the loading efficiency and entrapment efficiency were 18.7% and 83.7 ± 1.8% for TMX, respectively. The prepared nanoformulation (TMX-CNCs) had a width of 7–14 nm and a length of 85–214 nm with a zeta potential of −23.6 ± 0.3 mV. The drug release behavior study exhibited that the release of TMX from TMX-loaded CNCs was good and sustained. Furthermore, bioassay results showed that the insecticidal activity of TMX-CNCs againstPhenacoccus solenopsiswas significantly superior to that of the technical and commercial formulation, as indicated by the lower LC50value. The results indicate that the TMX nanoformulation has great potential for application in agriculture for pest control.Keywords:cellulose nanocrystals;thiamethoxam;insecticidal activity;Phenacoccus solenopsis
研究领域:
农业科学
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纳米技术
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昆虫学
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shangxing Chen,Linjian Li,Yangping Wen,Guangyao Yang,Guangbin Liu,Yufu Yi,Qingyin Shang,Xiuxia Yang,Shuo Cai
A simple and cheap thick-walled Moso biochar (BC) was selected and combined with carbonate minerals dolomite (DM) to construct a voltammetric sensing platform for application in stripping analysis of thiamethoxam in agricultural and environmental samples. The BC based on thick-walled Moso was prepared by pyrolyzing biomass wastes in limited oxygen atmosphere at temperatures of 600 °C for 2 h, and the BC-DM nanocomposite was obtained through milling and sieving, then liquidphase ultrasonic assistance by dispersing grinded DM and moso bamboo BC into ultra-pure water. The morphology and structure of the BC-DM nanocomposite were characterized by FT-IR, XRD, and SEM-EDX. Under optimal conditions, the BC-DM modified electrode showed high sensitivity and good stripping voltammetric response towards thiamethoxam in a linear range from 0.5 to 35 μg mL -1 with a limit of detection (LOD) of 0.22 μg mL -1 . The prepared nanocomposite sensor was employed for the determination of thiamethoxam in different real samples with acceptable recoveries. Thickwalled moso as biochar with post-modification provides a new promising platform for potential applications in electrochemistry.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Yanan Sun,Ping Ding,Jiayi Zhang,Kexin Sun,Xintong Li,Qing Ge,Yao Dang,Yunjiang Yu,Guocheng Hu
Microplastics (MPs) pollution, together with its consequential effect on aquatic biota, represent a burgeoning environmental concern that has garnered significant scholarly attention. Thiamethoxam (TMX), a prevalently utilized neonicotinoid insecticide, is renowned for its neurotoxic impact and selective action against targeted pests. The aquatic environment serves as a receptacle for numerous pollutants, such as MPs and neonicotinoid insecticides. However, there is currently a lack of comprehensive understanding regarding the toxic effects of co-exposure to aged MPs and neonicotinoid insecticides in aquatic organisms. Therefore, we endeavor to elucidate the deleterious impacts of aged polystyrene (PS) and TMX on zebrafish ( Danio rerio ) larvae when present at environmentally relevant concentrations, and to reveal the underlying molecular mechanisms driving these effects. Our study showed that exposure to aged PS, TMX, or their combination notably inhibited the heart rate and locomotion of zebrafish larvae, with a pronounced effect observed under combined exposure. Aged PS and TMX were found to diminish the activity of antioxidative enzymes (SOD, CAT, and GST), elevate MDA levels, and disrupt neurotransmitter homeostasis (5-HT, GABA and ACh). Notably, the mixtures exhibited synergistic effects. Moreover, gene expression related to oxidative stress (e.g., gstr1, gpx1a, sod1, cat1, p38a, ho-1, and nrf2b ) and neurotransmission (e.g., ache, ChAT, gat1, gabra1, 5ht1b, and 5ht1aa ) was significantly altered upon co-exposure to aged PS and TMX in larval zebrafish. In summary, our findings support the harmful effects of aged MPs and the neonicotinoid insecticides they carry on aquatic organisms. Results from this study enhance our understanding of the biological risks of MPs and insecticides, as well as help fill existing knowledge gaps on neonicotinoid insecticides and MPs coexistence toxicity in aquatic environment.
研究领域:
环境科学
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毒理学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Xuefei Qin,Yuping Lu,Mengmeng Bian,Zhourui Xiao,Yun Zhang,Yali Yuan
Herein, gold nanoparticles (Au NPs) in solution protected by various concentration of DNA at different aggregation states were found to have different quenching effect to the fluorescence of carbon dots (CDs). Au NPs wrapped up in more amount of DNA were able to quench the fluorescence of CDs more effectively, and vice versa. Based on this phenomenon, a facile and novel fluorescence sensing platform without labeling was constructed by designing the sequence of DNA as the aptamer of the detection target. With the addition of specific molecule, taking acetamiprid as representative, DNA was prior to bind with target and the Au NPs became less protected, leading to the fluorescence recovery of the CDs. Experimental results showed that the fluorescence of CDs was linearly recovered by acetamiprid in the concentration range of 7.8 × 10 −9 –1.4 × 10 −6 mol/L, with the detection limit of 1.5 × 10 −9 mol/L. This promising sensor might provide a new aspect for exploring the versatile application of CDs in various fields.
研究领域:
纳米技术
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Rubing Zou,Qianyi Yu,Zexiang Wang,Peiyu Yang,Ying Zhao,Yihua Liu,Yan Fu,Yirong Guo
Unexpected interferences from the food matrix pose challenges to achieving high-performance on-site monitoring of pesticide residues. In this study, we employed 3D printing technology to fabricate a miniaturized lab-on-a-chip (LOC) device for in-situ sample pretreatment. Serving as the analytical component, a lateral flow immunochromatographic strip was developed for thiamethoxam, a representative neonicotinoid insecticide. Results showed that the composite LOC device enabled on-site determination of thiamethoxam in 13 different food samples using a multi-step analysis approach. Similar to the buffer-based calibration curve (IC 50 : 0.11 ng·mL −1 ), the matrix-based calibration curves for celery (IC 50 : 0.15 ng·mL −1 ) and cucumber (IC 50 :0.10 ng·mL −1 ) samples exhibited ultrahigh sensitivities, with a total analysis time within 15 min. The average recovery rates were 87.2 % ~ 107.4 %, with relative standard deviations of 2.1 % ~ 7.6 % at the spiked levels of 1 and 5 ng·g −1 . Furthermore, this LOC device was applied to unknown food samples, achieving excellent accordance with LC-MS/MS confirmation.
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
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
·
2022
·
IF 2.506
Linlin Wang,Qiang Hu,Yanmin Huang,Qipeng Xiong,Yong Chen,Chunfang Gan,Yuanfei Zhang,Guoqin Cui,Jianguo Cui
The controlled release formulations (CRFs) are considered an effective way to solve damage to the environment caused by traditional pesticide formulations. To change the defects of traditional neonicotinoid formulations that dissolve quickly in soil, three types of thiamethoxam (TM) CRFs microspheres with content of 20% TM were prepared using microcrystalline wax (MK) as the matrix, laurate acid tapioca starch ester (MSK) and stearyl dehydroabietic acid ester (MDK) as the regulators of ingredient release. The release behavior of CRFs microspheres in water and soil showed that the microspheres had superior stability and different TM sustained-release periods, and TM release of the microspheres in soil was faster than that in water. The release rate is TM/MDK > TM/MSK > TM/MK. In water, the release of thiamethoxam technical was finished after 38 hours. However, for TM/MK, the release rate was 94% after 240 hours, and the release time was extended by 6 times. Meanwhile, TM/MDK has a particular pH-responsive release. Research shows that using microcrystalline wax as the matrix, by adding MSK or MDK to adjust the release of ingredients, pesticide CRFs microspheres with different release periods can be prepared to achieve the purpose of controlling the release of pesticides.
研究领域:
农药科学
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环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Honghui Jiang,Zhenxin Hu,Yuanhao Ouyang,Xiaodong Ji,Xi Hu,Tingting Li,Ke Ouyang,Ping Wang,Hui Wang,Xinjiang Hu
Mounting evidence highlights the negative impacts of thiamethoxam (THM) on non-target organisms and ecosystem. Herein, multi-phase cadmium sulfide loaded on biochar (CdS@BC) was used to photocatalytic activate peroxymonosulfate (PMS) to remove THM. The obtained CdS@BC significantly improved the photocatalytic performance of PMS on THM degradation with a superior rate constant of 0.165 min −1 , 60 times more than that of BC. In addition, the catalyst displayed excellent stability and reusability. The mechanism of free radical formation by adsorption activation of PMS adsorbed on CdS@BC was characterized using active species detection and Density functional theory (DFT) calculations. According to the DFT study, the phase junction and π-conjugated structure contribute to the stable migration of π-electrons, thus effectively activating the PMS to produce active substances for the degradation of THM. The findings provide a theoretical basis for the design and synthesis of effective catalysts for AOPs to remove emerging organic contaminants from wastewater.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yong Yang,Xinxin Ma,Chunhong Yang,Yanru Wang,Jingli Cheng,Jinhao Zhao,Xiaowu Dong,Qingming Zhang
Neonicotinoids, extensively present in water environment, can adversely affect the ecological safety and human health. Herein, a low-cost magnetic porous carbon ZIF-67/CS@C derived from ZIF-67 and agricultural waste corn stalk (CS) is designed and applied for adsorptive removal of imidacloprid and thiamethoxam from water. The adsorbent is fabricated by carbonizing ZIF-67/CS hybrid pre-prepared through an in-situ decoration of ZIF-67 on the surface of CS, and then acid picking to elute the unstable constituents. In the carbonization, Co 2+ ions are reduced to magnetic Co 0 nanoparticles, with the result that ZIF-67/CS@C shows a strong magnetic response (saturation magnetization intensity is 12.25 emu‧g −1 ) and can be easily magnetically separated. Meanwhile, Co nanoparticles are protectively encapsulated in well-developed graphitized wall, which endows ZIF-67/CS@C with good acid resistance (only 0.23% of Co is leached out at pH 1.0). More importantly, reasonable pore size distribution (most pore sizes match or are 3–6 times that of imidacloprid and thiamethoxam) and high external surface area (280 m 2 ‧g −1 ) are obtained, which makes ZIF-67/CS@C super adsorbent. The adsorption capacities for imidacloprid and thiamethoxam can reach as high as 189 and 133 mg‧g −1 , respectively. Moreover, after six consecutive recycling processes, the adsorption efficiencies are still above 95%, which reveals excellent reusability of ZIF-67/CS@C. Mechanism analysis affirms that pore-filling, H-bond, and π-π EDA interaction are mainly responsible for driving imidacloprid and thiamethoxam adsorption. Finally, ZIF-67/CS@C with a great security towards Daphnia carinata survival and wheat growth is eco-friendly. This study can be easily adapted to different biomass wastes and MOFs, thus potentially enabling the preparation of more novel adsorbents.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2020
·
IF 5.715
Zhenlan Xu,Xiaoting Qian,Chao Wang,Chunrong Zhang,Tao Tang,Xueping Zhao,Lingxiangyu Li
Microplastics (MPs) as a type of emerging contaminant in the environment have attracted extensive attentions in recent years, and understanding the impacts of MPs on soil biodiversity and functioning are thus increasingly urgent. Nevertheless, few studies were performed to investigate potential effects of MPs on decay of soil organic pollutants in particular pesticides and enzyme activities . Herein, three types of MPs including polystyrene fragments (PS-50) and polyvinyl chloride beads (PVC-42000 and PVC-10) were added to soil at environmentally relevant concentrations (0.2 and 1.0%) to study their impacts on dissipation of thiacloprid and activities of urease, acid phosphatase , invertase and catalase . MPs exhibited negligible impacts on thiacloprid dissipation regardless of MPs type and content, being probably attributed to the unaltered bioavailability of thiacloprid in soil even after an addition of MPs, which was documented by using the hydroxypropyl-β- cyclodextrin (HPCD) extraction method. Batch sorption experiments also exhibited the comparable adsorption capacity of thiacloprid to soil with and without MPs, along with K f valuses of 3.44–3.77. Besides, MPs exerted negligible effects on enzyme activities of soil. Taken together, this study showed negligible impacts of MPs at environmentally relevant concentrations on thiacloprid dissipation and enzyme activity, expanding our knowledge on impacts of MPs at the environmentally relevant concentrations on pesticide dissipation in soil.
研究领域:
环境科学
·
土壤生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Youzheng Chai,Ma Bai,Anwei Chen,Xiyan Xu,Zhaohui Tong,Jiayi Yuan,Liang Peng,Jihai Shao,Jiahao Xiong,Cheng Peng
The safe disposal and resource utilization of heavy metal contaminated biomass has long posed a huge challenge. The direct preparation of heavy metal-contaminated straw into a biomass-derived multi-metal loading heterogeneous Fenton catalyst (BHFC) through pyrolysis for thiamethoxam (THX) degradation is a win–win strategy to address this problem. In this method, Fe, Mn, Cu, and Zn in contaminated biomass collected from mineral areas are released as active metals and loaded in the form of metal oxides on biomass pyrolysis biochar with a mesoporous structure. The presence of multiple metals accelerated the mutual redox, increased oxygen mobility, synergistically promoted the generation of hydroxyl radicals, and reached 100% THX degradation rate and 90% total organic carbon removal within 20 min using the optimum BHFC-600. The BHFC derived from biomass contaminated with different heavy metal contents showed differences in catalytic performance. The THX degradation rate of BHFC prepared from higher metal level biomass increased by 1.2-fold compared to the low level. Possible pathways and mechanisms of THX degradation was investigated using different methods, including density functional theory calculations. The degradation of THX can be mainly attributed to h + , OH, and O 2 – attacking the region with a high Fukui index. This study presents a promising strategy for preparing sustainable environmentally functional materials and provides new feasible ideas for the safe treatment of contaminated biomass.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）