CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Hongxia Liu,Jiayi Yao,Lianhong Wang,Xinghao Wang,Ruijuan Qu,Zunyao Wang
Fenitrothion (FNT), a common organophosphorus pesticide, has been regarded as a contaminant because it is adverse to the environment. In this study, we chose the highly effective technique, persulfate (PS) activation by zero-valent iron powder (Fe 0 ), to degrade FNT. The effects of several experimental parameters including PS and Fe 0 dosages, pH, temperature, and common natural water constituents were systematically investigated via kinetics studies. We found that the addition of Fe 0 significantly enhanced the FNT degradation by PS under any of the studied conditions. Under the optimal conditions of [FNT]:[PS] = 1:500 (molar ratio), Fe 0 :PS = 1:1.5 (molar ratio), pH = 3.0, and 35 °C, 10 mg L −1 of FNT could be completely degraded in 45 min and 20 μg L −1 FNT was removed 96 ± 0% in 12 h. Sulfate (SO 4 − ) radicals led the degradation of FNT in the Fe 0 /PS system. Twelve transformation products of FNT were determined by LC-MS/MS analysis, and the vulnerable sites in FNT were predicted by a density-functional-theory-based descriptor, 2∑(C ri HOMO ) 2 , to illustrate the generation of initial reaction products. The overall acute and chronic toxicity of FNT and its products, as predicted by the ecological structure–activity relationship model (ECOSAR), decreased in the Fe 0 /PS process. The present work proves that FNT could be efficiently degraded by Fe 0 -activated PS, which may also contribute to future research on the removal of other organophosphorus pesticides.
研究领域:
环境科学
·
农药化学
·
水处理技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jiejun Li,Lin Li,junjie Fei,Pengcheng Zhao,Jinyao zhao,Yixi Xie
Fenitrothion (FT) is a common organophosphorus pesticide widely used in agricultural. Residues of fenitrothion in crops can adversely affect human health. In this work, modified MIL-125-Fe was prepared by changing the solvent ratios and further etching with iron nitrate, followed by high-temperature pyrolysis to obtain modified-TiO 2 /FeTiO 3 -doped nitrogen-containing carbon framework (m-TiO 2 /FeTiO 3 @NCF). The porous carbon material of m-TiO 2 /FeTiO 3 @NCF was used to modify the GCE to produce FT electrochemical sensor. Under optimized conditions, the sensor exhibited good detection performance for FT with a low LOD of 0.96 nM and a wide detection linear range of 1–9000 nM, and also exhibited good reproducibility (RSD = 2.08 %), repeatability (RSD = 1.09 %) and anti-interference performance. The sensor was successfully applied in real sample tests showing the recovery rates of 98.7 %–101.2 %. The present study provides a new idea for the rapid and accurate detection of FT.
研究领域:
农业科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·5930
·
IF 4.2
Liang Hao,Jingfei Luan
A highly versatile Z-scheme heterostructure, Ho2SmSbO7/YbDyBiNbO7(HYO), was synthesized using an ultrasonic-assisted solvent thermal method. The HYO heterojunction, composed of dual A2B2O7compounds, exhibits superior separation of photogenerated carriers due to its efficient Z-scheme mechanism. The synergistic properties of Ho2SmSbO7and YbDyBiNbO7, particularly the excellent visible light absorption, enable HYO to achieve exceptional photocatalytic performance in the degradation of fenitrothion (FNT). Specifically, HYO demonstrated an outstanding removal efficiency of 99.83% for FNT and a mineralization rate of 98.77% for total organic carbon (TOC) during the degradation process. Comparative analyses revealed that HYO significantly outperformed other photocatalysts, including Ho2SmSbO7, YbDyBiNbO7, and N-doped TiO2, achieving removal rates that were 1.10, 1.20, and 2.97 times higher for FNT, respectively. For TOC mineralization, HYO exhibited even greater enhancements, with rates 1.13, 1.26, and 3.37 times higher than those of the aforementioned catalysts. Additionally, the stability and durability of HYO were systematically evaluated, confirming its potential applicability in practical scenarios. Trapping experiments and electron paramagnetic resonance analyses were conducted to identify the active species generated by HYO, specifically hydroxyl radicals (•OH), superoxide anions (•O2−), and holes (h+). This facilitated a comprehensive understanding of the degradation mechanisms and pathways associated with FNT. In conclusion, this study represents a substantial contribution to the advancement of efficient Z-scheme heterostructure and offers critical insights for the development of sustainable remediation approaches aimed at mitigating FNT contamination.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2010
·Vol. 22
·期 10
·1061-1065
·
IF 2.63
Jun Li,Jingjing He,Jingxia Qiu,Shanqing Zhang,Huijun Zhao,Yuqing Miao
An acetylcholinesterase (AChE)-lecithin biomimetic structure was constructed at the oil/water interface for the direct determination of fenthion in cyclohexane. Indophenol acetate in oil phase was hydrolyzed by AChE at the two-phase interface to produce indophenol. Square wave voltammetry was used to monitor the current decrease of substrate to assess AChE activity. The AChE incorporated in the lecithin-based biomimetic layer possessed higher enzymatic activity and was more sensitive to fenthion inhibition than freestanding AChE. A linear relationship between the inhibition percentage and logarithm of fenthion concentration was obtained in a concentration range from 1 ng/mL to 1 mg/mL.
研究领域:
生物化学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2016
·Vol. 71
·期 9
·891-895
·
IF 0.694
Teng Y. J.,Liu W. H.,Liu J. M.,Nie Y. H.,Li P.,He C. J.
The detection of trace fenthion using surface-enhanced Raman scattering (SERS) was proposed via the OH stretching band of water serving as an internal standard. The adsorption process of fenthion on the silver nanoparticle aggregates was characterized by UV-Visible absorption spectrometry and the optimal adsorption time was about 20 min. The OH stretching band of H 2 O molecule presented around 3100–3500 cm –1 in SERS spectrum was identified by density functional theory and it was not interfered with other characteristic peaks of fenthion. The linearity was obtained from the concentrations divided by the ratio of the benzene ring stretching area around 1073 cm –1 and the internal standard of OH stretching area from 3100 to 3500 cm –1 , while the detection limit was calculated as 0.46 µM. The proposed SERS detection method was used in analyzing lake water sample with the recovery of 94–99%.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Peipei Qi,Jiao Wang,Xue Wang,Xiangyun Wang,Zhiwei Wang,Hao Xu,Shanshan Di,Qiang Wang,Xinquan Wang
An efficient, highly sensitive and selective electrochemical sensor was developed for determination of fenitrothion in tap water, cropland water and canal water samples. The synthesized reduced graphene oxide (RGO) and molybdenum sulfide (MoS 2 )-Au were introduced using their synergetic enhancement effect to improve the sensor sensitivity. Zirconia (ZrO 2 ) nanoparticles were electro-deposited onto modified gold electrode to selectively adsorb fenitrothion, which can be further captured by cyclic voltammetry or square wave voltammetry on the basis of its redox behavior of nitrobenzene group. The immobilization process was characterized by electrochemical impedance spectroscopy , illustrating the enhancement of RGO/MoS 2 -Au composite and the successful electro-deposition of ZrO 2 . Systematical method validation was performed including linearity, sensitivity, selectivity, reproducibility, regeneration and stability. The current is linearly correlated with the fenitrothion concentration from 5.0 to 600 ng mL −1 with the limit of detection of 2.2 ng mL −1 . The developed electrochemical sensor displayed satisfactory performance in real water samples analysis.
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
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Jingxuan Han,Yan Zhang,Zhenfei Chen,Ao Zhang,Xuerong Shi
The rational design and fabrication of high-performance electrochemical sensors for the determination of environmentally hazardous substances, such as fenitrothion, is of great significance and remains a great challenge. Understanding the interaction between fenitrothion and substrates is critical to inform the design of electrochemical sensors. Herein, we have developed an electrochemical sensor based on nitrogen and sulfur co-doped holey graphene (NS-HG) for fenitrothion. NS-HG with high levels of nitrogen and sulfur leaded to excellent conductivity and a fast electron transfer rate. NS-HG modified electrode showed high electrochemical activity towards fenitrothion. The results were supported by density functional theory (DFT) calculations. The adsorption energy calculations and density of states analysis (DOS) showed that NS-HG exhibited strengthened fenitrothion adsorption and fast electron transfer rate by nitrogen and sulfur co-doping. The fenitrothion sensor based on NS-HG showed an excellent analytical response with high sensitivity, low LOD (0.062 ng·ml −1 ), excellent selectivity, stability, and satisfactory recoveries for real samples. This research provides new insights into understanding the synergetic effect of co-dopant, and new opportunities for the rational design of electrochemical sensors.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SPECTROSCOPY
·
2024
·
IF 2.2
Hang Zhao,Xinyu Cui,Panshuo Zhang,Min Zhou,Chunlin Liu,Xiaofeng Shi,Jun Ma
Current label-free surface-enhanced Raman spectroscopy (SERS) assay for the detection and analysis of organophosphorus pesticides has achieved initial success, but the application still faces constraints of substrate portability and specificity. To this end, this paper demonstrates a method for portable, rapid, and specific detection of low concentrations of fenthion pesticides based on a solid substrate of gold nanoparticle monolayers combined with molecularly imprinted polymers (MIPs). The nano-monolayers were transferred to the surface of mercapto-silicon wafers by interfacial self-assembly technique to form a stable connection with S–Au bonds and, at the same time, prevent nanoparticles from dropping off during the surfactant removal process. Then, the fenthion MIPs were directly generated on the surface of the monolayer film by spin-coating with a pre-polymerization solution and ultraviolet-induced polymerization. Tests showed that the molecular imprint was able to accurately bind to fenthion, but not other molecules, in a mixture of structural analogs, achieving a low concentration detection of 10–8 mol/L. The composite substrate maintained a signal uniformity of a relative standard deviation (RSD) = 7.05% and a batch-to-batch reproducibility of RSD = 10.40%, making it a potential pathway for the extended application of SERS technology.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Luqi He,Peihuan He,Jiacong Li,Meng Xiong,Yeshun Zhang,Hui Yan
The residue of pesticide fenthion is a common issue in food safety, and how to conveniently detect it is a challenge in the food industry. Therefore, combined with a portable Raman spectrometer, a surface enhanced Raman spectroscopy (SERS) method based on a high-performance substrate Au@AgNPs had been designed for the rapid and sensitive detection of fenthion. Au@AgNPs can be induced to generate more hot spots to improve SERS signals because of their core-shell structure. The quantitative detection of fenthion was achieved under the optimal conditions: pH 7.0, 10 −3 M CaCl 2 , 70 % Au@AgNPs concentration, and 4 min of incubation time. The results showed that the method had a wider detection range of 0.1–100 mg/L, a low detection limit (LOD) of 0.036 mg/L, excellent anti-interference ability, and reproducibility. In addition, the method was successfully validated with the actual sample rice. Therefore, the method had the advantages of being fast, on-site, and easy to use, which is useful for promoting its application.
研究领域:
食品安全
·
分析化学
·
纳米技术
✓ 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）