PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2021
·
IF 6.158
Boqian Li,Shu Li,Ludong Yi,Haosheng Sun,Jun Qin,Jun Wang,Dawei Fang
Diazinon (DZN), a broad-spectrum and highly effective organophosphorus pesticide, is widely being used in agricultural production and household environments. However, massive DZN effluent can be generated during the DZN production process, which will cause devastating effects on the ecosystem and damage human health due to the improper dispose of pesticide effluent before discharging. In this work, hydrodynamic cavitation (HC), a new advanced oxidation technology, was used to degrade DZN in wastewater for the first time. The influences of DZN initial concentration (5.0–15 mg/L), solution pH (4.0–10), temperature (30–50 °C) and some orifice plate geometric parameters (orifice numbers and orifice half angles) on the degradation effect of DZN were investigated. It can be observed that the DZN in solution can be effectively degraded in orifice plate HC system based on three orifices with 45° convergent half angle and the degradation ratio can reach 50.52 % under the operation conditions of 150 min treatment time, 30 °C temperature and pH = 4.0 acidity. Subsequently, the studies of intensifying DZN degradation were also carried out through adding different inorganic oxidants such as potassium peroxodisulfate (K 2 S 2 O 8 ), potassium periodate (KIO 4 ) and sodium perchlorate (NaClO 4 ). The maximum DZN HC degradation extent (81.92 %) can be achieved in the presence of K 2 S 2 O 8 under the optimized conditions. The generated intermediate products in DZN HC degradation process are some low-toxic and low-active substances. And that, these intermediate products can be further mineralized to H 2 O, CO 2 and inorganic ions. On the basis of cavitational yield, the energy consumption analysis has been performed. Overall, this work demonstrates that the HC combined with oxidant K 2 S 2 O 8 may be a promising strategy for the large-scale treatment of organophosphorus pesticide wastewater.
研究领域:
环境科学
·
农药化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ECONOMIC ENTOMOLOGY
·
2025
·
IF 2.4
Tian Chao,Tang Jie,Zhu Qingyu,Guo Xiqian,Shu Qilong,Gu Zhiya,Li Fanchi,Li Bing
Bombyx mori (L.) (Lepidoptera: Bombycidae) is an important economic insect, and Exorista sorbillans (W.) (Diptera: Tachinidae) is an endoparasitic pest of larval B. mori. Dimethoate is less toxic to B. mori than E. sorbillans and is used in sericulture to controlling E. sorbillans. To investigate the effects of dimethoate treatment on the gut microorganisms and physiological functions of B. mori, 16S rRNA sequencing was used to analyzed the composition and structure of the gut microbiota. This study investigated their role in enhancing silkworm resistance by screening dominant populations after dimethoate treatment. The results indicated that dimethoate did not alter the composition of the dominant gut bacterial groups in silkworm; however, it significantly increased the abundance of the gut bacteria Methylobacterium and Aureimonas, and decreased the abundance of Enterobacterales, Bifidobacterium, Blautia, Collinsella, Faecalibacterium, and Prevotella. Eleven strains of dimethoate-resistant bacteria were selected through in vitro culture, all of which were unable to grow when dimethoate was used as a carbon source. Additionally, a germ-free silkworm model was established to assess detoxifying enzyme activity in the midgut. The results revealed that the gut symbiotic microbiota can enhance dimethoate resistance by increasing detoxification enzyme activity. This study identifies a novel pathway for silkworm resistance to dimethoate based on gut microbiota, providing new insights into the role of symbiotic gut bacteria in insecticide metabolism.
研究领域:
昆虫学
·
微生物学
·
农药科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2023
·
IF 6
Lian Xia,Jianxun Han,Xiaohuan Huang,Xiaojuan Niu,Xin Lin,Yuangen Wu
The overutilization of dimethoate may lead to its deposition in both the environment and crops, which potentially induces neurological, respiratory, and hepatic abnormalities upon absorption by organisms. Colorimetry can accurately determine dimethoate, but there are still many challenges in the rapid, convenient, and point-of-care detection. Herein, based on the inhibitory effect of dimethoate on the laccase activity of silver citrate (AgCit), a smartphone-assisted colorimetric sensor and rapid detection enzyme sheets were constructed. It was demonstrated that dimethoate could adsorb on the surface of AgCit and inhibit the production of semiquinone radicals in the reaction system. Then, the AgCit laccase activity was inhibited, causing the colorimetry sensor and the enzyme sheets turned light red or even colorless. The constructed sensor has higher sensitivity and the limit of detection for dimethoate is 1.0 μg⋅L −1 . Moreover, the developed enzyme sheets have good selectivity and specificity, and display the detection results within 5 min. Thus, the colorimetric sensor and the constructed enzyme sheets are expected to be used for large-scale preliminary detection of dimethoate residues in actual agricultural products.
研究领域:
环境科学
·
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yanbo Tian,Abdul Majid,Yuewei Zhang,Liju Tan,Huiru Li,Na Wang,Jiangtao Wang
In this study, molecularly imprinted polymers (MIPs) were prepared for the specific recognition of organophosphorus pesticides and a rapid, efficient and simple method was established for the detection of dimethoate (DIT) in food samples. Fe 3 O 4 magnetic nanoparticles were synthesized by co-precipitation, and Fe 3 O 4 /ZIF-8 complexes were prepared by a modified in-situ polymerization method, and then magnetic molecularly imprinted polymers (MMIPs) were prepared and synthetic route was optimized by applying density functional theory (DFT). The morphological characterization showed that the MMIPs were coarse porous spheres with an average particle size of 50 nm. The synthesized materials are highly selective for the organophosphorus pesticide dimethoate with an adsorption capacity of 461.50 mg·g −1 and are effective resistance to matrix effects. A novel method for the determination of DIT in cabbage was developed using the prepared MMIPs in combination with HPLC. The practical results showed that the method can meet the requirements for the determination of DIT in cabbage with recoveries of 85.6–121.1 % and detection limits of 0.033 μg·kg −1 .
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiaofang Shen,Zhaoxia Li,Yan Cui,Yuehong Pang
Thiol biomolecule of glutathione (GSH) combined with lead ion as precursor for synthesis of hierarchical PbS via hydrothermal degradation has been developed. The precursor and as-prepared PbS were characterized by Fourier-transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and electrochemical technique. Flower-shaped micron crystals, submicron-sized spherical particles and dendritic PbS were controllably synthesized by adjusting pH value of the precursor solutions. GSH acted as both soft template and sulfur source in the synthesis. To investigate the suitability of PbS for pesticidal sensing application, an pesticidal biosensor based on the AChE-CHIT/dendritic PbS/GCE has been devised. Organophosphate pesticide dimethoate was selected as model to examine the feasibility of pesticidal bio-sensing. Under the optimum conditions, a quantitative measurement of dimethoate was achieved with the linear range of 0.05 μM to 1.0 μM and the detection limit of 0.02 μM.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 11
·2810
·
IF 4.35
Xinpeng Yan,Zhong Zhang,Runguang Zhang,Tian Yang,Guoying Hao,Li Yuan,Xingbin Yang
Given the imperative of monitoring organophosphorus pesticides (OPs) residues in the ecosystem, here a novel, facile and sensitive fluorescence sensor is presented for the rapid detection of dimethoate. In this work, surface molecularly imprinted polymer (SMIP) and microfluidic technology had been introduced to enhance the selectivity and portability of the described methodology. Oil-soluble CdSe quantum dots (QDs) synthesized in a green way were used as fluorescent material for the selective detection of dimethoate on the basis of static quenching and photoinduced electron transfer mechanism. Among many kinds of paper materials, glass fiber paper was used as the novel substrate of paper chip due to low pristine fluorescence and better performance when combining CdSe QDs. In the process of molecular imprinting, the interaction between several functional monomers and dimethoate molecule was investigated and simulated theoretically by software to improve the selectivity of the sensor. Consequently, the fabricated novel detection platform could effectively respond to dimethoate in 10 min with the concentration range of 0.45–80 μmol/L and detection limit of 0.13 μmol/L. The recovery in the spiked experiment soybean sample was in an acceptable range (97.6–104.1%) and the accuracy was verified by gas chromatography-mass spectrometry, which signified the feasibility and potential in food sampling.Keywords:oil-soluble CdSe QDs;dimethoate;microfluidic paper chip;fluorescence sensor
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Xincheng Yan,Rui Rong,Shanshan Zhu,Mingchun Guo,Shang Gao,Shasha Wang,Xiaolong Xu
The extensive applications of ZnO nanoparticles (nano ZnO) and dimethoate have increased the risk of people’s coexposure to nano ZnO and dimethoate. Therefore, we evaluated in this study the effects of nano or bulk ZnO on dimethoate-induced toxicity in mice. The serum biochemical parameters, biodistributions, oxidative stress responses, and histopathological changes in mice were measured after intragastric administration of nano or bulk ZnO and/or dimethoate for 14 days. Oral administration of nano or bulk ZnO at a dose of 50 mg/kg did not cause obvious injury in mice. In contrast, oral administration of dimethoate at a dose of 15 mg/kg induced observable oxidative damage in mice. Co-administration of nano or bulk ZnO with dimethoate significantly increased Zn accumulation by 30.7 ± 1.7% or 29.7 ± 2.4% and dimethoate accumulation by 42.8 ± 2.1% or 46.6 ± 2.9% in the liver, respectively. The increased accumulations of dimethoate and Zn in the liver reduced its cholinesterase activity from 5.64 ± 0.45 U/mg protein to 4.67 ± 0.42 U/mg protein or 4.76 ± 0.45 U/mg protein for nano or bulk ZnO, respectively. Furthermore, the accumulations of dimethoate and Zn in liver also increased hepatic oxidative stress, resulting in severe liver damage. Both nano and bulk ZnO dissolved quickly in acidic gastric fluid, regardless of particle size; therefore, they had nearly identical enhanced effects on dimethoate-induced toxicity in mice.
研究领域:
毒理学
·
纳米技术
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Deshuai Kong,Rui Jin,Tianshuang Wang,Hongxia Li,Xu Yan,Dandan Su,Caileng Wang,Fangmeng Liu,Peng Sun,Xiaomin Liu,Yuan Gao,Jian Ma,Xishuang Liang,Geyu Lu
Precise monitoring of pesticide with portable device was challenging because it required high sensitivity, short response time, strong stability and excellent selectivity. Herein, we newly constructed a stimuli-responsive hydrogel (SRHg)-based portable kit by embedding copper nanoparticles (CuNPs) in agarose hydrogel. In this work, dimethoate as inhibitor of urease restrained the generation of ammonia, which reduced in-situ etching of CuNPs, resulting in the fluorescence color response of test kit under ultraviolet illumination. Interestingly, by means of smartphone-based nanocolorimetry, the photo image of portable kit could be translated into digital information using ImageJ software, achieving a direct quantitative tool for dimethoate identification. The simplicity of SRHg-based portable kit combined with smartphone-based color recognition not only improved the analysis sensitivity (detection limit of 1.0 μg L −1 ), accuracy and stability, but also simplified operation process and shortened sample-to-answer analysis time (55 min), demonstrating that the methodology met the needs of daily testing and provided a new sight for on-site monitoring of food safety and human health.
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Shaofeng Yuan,Fangwei Yang,Hang Yu,Yunfei Xie,Yahui Guo,Weirong Yao
Bioremediation of pesticides in contaminated foodstuffs using probiotics has attracted great attention in recent years, but some intermediate products may have profound effects on the toxicity of treated food. Therefore, this work studied the degradation mechanism of dimethoate in milk by L. plantarum, and analyzed the toxicity of degradation products. The results showed that under the optimal conditions, L. plantarum can degrade 81.28% of dimethoate. Dimethoate had high binding affinities to phosphatase with the free energy of –16.67 kcal/mol, and amino acid residues, Gln375 and SER415 played important roles in the catalysis process. Five degradation products were identified using UPLC-QTOF/MS, and their toxicity was estimated using quantitative structure–activity relationship models. Some intermediate products were predicted to be toxic, which should not be ignored, but the overall toxicity of milk decreased after fermentation. Furthermore, the pH and titratable acidity of the fermented milk were 4.25 and 85 ◦ T, respectively.
研究领域:
食品科学
·
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jinsuo Lu,Zhanguo Cui,Xiaoyong Deng,Zhijie Liang,Shouning Chai,Junyu Fan,Zhiqiang Zhang,Zhiwei Zhao
Ferrate (Fe(VI)) is usually effective for oxidizing a variety of organic pollutants within a few seconds, but some recalcitrant asorganophosphorus pesticides such as dimethoate require higher dose of Fe(VI) and inorganic phosphorus produced by mineralization is difficult to remove. In this study, acid-activated ferrate (Fe(VI)) was firstly used to degrade organophosphorus pesticides dimethoate and simultaneously remove total phosphorus (TP) from solution under simulated sunlight. At a Fe(VI):dimethoate molar radio of 15:1, dimethoate was almost completely removed within 20 min and 47% of TP in the solution was removed by the reduction product of Fe(VI) within 240 min. Electron paramagnetic resonance (EPR) and terephthalic acid (TA) fluorescence experiments showed that •OH radicals were continuously generated in the system, and •OH formation pathway was proposed. Importantly, the involvement of •OH in acid-activated Fe(VI) process was confirmed for the first time by EPR. In the acid-activated Fe(VI)/simulated sunlight system, the removal of dimethoate and TP gradually increased with the decrement of activation pH, whereas the increase of molar ratio of Fe(VI):dimethoate enhanced the removal of dimethoate and TP. The addition of inorganic anions (HCO 3 - and NO 2 - ) had obvious inhibitory effects on dimethoate and TP removal. Eight degradation products including O,O,S-trimethylphosphorothiate, omethoate and 2- S -methyl-(N-methyl) acetamide were determined by gas chromatography mass spectrometry (GC-MS) analysis, and two possible degradation pathways were proposed. The insights gained from this study open a new avenue to simultaneously degrade and remove organic contaminants .
研究领域:
环境科学
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Wenhao Zhang,Zhichong Qi,Pengcheng Yan,Ruya Ma,Erjin Zhang,Song Zhang,Keqiang Xu,Li Xu,Henan Li
As a widely used insecticide, diazinon (DIA) is easily hydrolyzed into highly toxic tetraethyl thiophosphate in water, posing significant long-term risks to both aquatic ecosystems and public health. A sensitive photoelectrochemical (PEC) aptasensor was developed by integrating Mo 2 N nanoparticles with g-C 3 N 4 (Mo 2 N/g-C 3 N 4 ) to function as an electron acceptor for DIA detection. The combination of high conductivity and wide spectral response in Mo 2 N enables enhanced photogenerated charge collection. Driven by an internal electric field (IEF), recombination with g-C 3 N 4 can form Schottky junctions, promote directional transfer of electrons, and substantially inhibit electron-hole pair recombination. Thus, g-C 3 N 4 exhibited significantly boosted photocurrent under visible light. Through π-π conjugation effect, an aptamer specifically recognizing DIA was introduced at the electrode interface, establishing the PEC sensing interface. The PEC aptasensor constructed based on this achieves highly sensitive and specific detection of DIA. The sensor showed a broad linear range (5 ×10 −3 -1 ×10 3 pM) and an ultra-low detection limit (1.67 ×10 −3 pM) for DIA. Moreover, it exhibited remarkable accuracy, selectivity, and applicability when applied to real water samples. This work extends the application of Schottky junctions to the sensitive detection of pesticide residues and achieves effective amplification of sensing signals, providing profound insights for constructing excellent PEC aptasensors.
研究领域:
分析化学
·
环境毒理学
·
生物传感器
·
农药残留检测
·
光电器件
·
分子识别
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Jingcheng Huang,Mei Zhang,Xue Huang,He Li,Jie Han,Shancang Zhao,Mohamed Bedair Mohamed Ahmed,Xia Sun,Yemin Guo
Stable detection of diazinon (DZN) residues in vegetables is important for food safety. In this work, an electrochemiluminescence (ECL) aptasensor with dual-catalytic glucose in-situ production of H 2 O 2 was constructed for the stable detection of DZN in vegetables. Firstly, MWCNTs@MB was prepared using π-π stacking interactions between methylene blue (MB) and multi-walled carbon nanotubes (MWCNTs) to enhance the loading of MB on an electrode and thus catalyze the generation of H 2 O 2 from glucose. Secondly, Cu 2 O@AuNPs was formed by loading AuNPs on the surface of Cu 2 O through spontaneous reduction reaction, which improved the interfacial charge transfer, Cu 2 O nano-enzyme had glucose oxidase mimicking activity and could further catalyze the production of more H 2 O 2 from glucose. MWCNTs@MB and Cu 2 O@AuNPs played a key role in the in-situ generation of co-reacting reagent H 2 O 2 , which solved the problem of unstable detection caused by the easy decomposition of the H 2 O 2 solution added to the luminescence system. In addition, the aptamer was immobilized on the electrode surface by forming Au–S bonds with Cu 2 O@AuNPs. As a result, the ECL aptasensor performed good linearity in 1.00 pg mL −1 -1.00 μg mL −1 and a low limit of detection (LOD) to 0.39 pg mL −1 (S/N = 3). This work provided an effective method for the accurate and stable detection of DZN residues in vegetables, which was of great significance in ensuring food safety and assessing the environmental risk of DZN.
研究领域:
食品安全
·
分析化学
·
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）