ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 26
·26394-26404
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IF 2.8
Liu Yong,Lang Jie,Wang Ting,Jawad Ali,Wang Haibin,Khan Aimal,Chen Zhulei,Chen Zhuqi
Phenylurea herbicide residuals in soil may continuously contaminate surface water and groundwater due to unregulated and improper use. Herein, we reported a stable and active oxidation system including heterogeneous Fe-based layered double hydroxide materials as persulfate (PS) activators. Under mild conditions, 1% LDH in weight and 70 mM PS can completely degrade 500 mg/kg isoproturon in soil within 10 h, during which less than 0.1 ppm heavy metal leaching was detected. This remarkable performance was consistent in a broad pH range (3~11) and was resistant to various inorganic anions (Cl − , Br − , NO 3 − , HCO 3 − ) and humic acid. Mechanism studies from scavenging tests, EPR, and fluorescence spectra collectively proved that besides •OH and •SO 4 − , singlet oxygen ( 1 O 2 ) and superoxide (•O 2 − ) were also generated and were accounted for the oxidative degradation. This unique mechanism of generating diverse radicals was clearly distinguished from classic Fe(II)/PS system, significantly reduced the influence of varying parameters in water and soil matrix, and was suggestive to chemical oxidation system in soil remediation to avoid scavenging effects by background electrolytes or other components in water/soil matrix.
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研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xian Liu,Like Chen,Yibo Gao,Jiebin Li,Junyong Sun,Tian Gan
In this context, an innovative design of a molecularly imprinted polymer (MIP) capped Au@HKUST− 1 nanocapsules−based electrode was described for highly sensitive and selective detection of isoproturon herbicide. The Au@HKUST− 1 nanocapsules were constructed by in−situ growth of nanoscaled HKUST− 1 crystals on Cu 2 O core materials and subsequent encapsulation of Au nanoparticles inside the hollow HKUST− 1 walls via galvanic replacement reaction between AuCl 4 − and Cu 2 O. After a further surface imprinting−directing polymerization process in the presence of hydrophobic Au@HKUST− 1, a high−performance electrochemical sensing platform was obtained and used for recognition and quantification of isoproturon. Under the optimal experimental conditions, a linear relationship was observed covering the linear range of 0.0010 − 45 μM with an ultra−low detection limit of 0.45 nM. In addition, the Au@HKUST− 1 @MIP modified electrode had higher sensing specificity for isoproturon in the application of water samples with recoveries in the range of 99.07 − 105.8% and a relative standard deviation of < 4%.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiaoyi Long,Chaorui Deng,Gansheng Xiao,Fuliang Cheng,Ying Zhou,Lei Zhao,Longfei Cai,Jinyin Chen,Juan Du
An ultra-high antifouling electrochemical sensor has been established and described for determination of isoproturon (ISO) in the practical complex sample owing to its chemical stability. The complexity of practical sample severely influences the reliability and stability of sensors for ISO detection. Therefore, design an effective antifouling electrode is necessary. Glassy carbon electrode (GCE) modified with Nafion membrane was applied to monitor ISO via square wave voltammetry (SWV), showing great promising practical application for pesticide residue detection. The proposed sensor can sensitively detect trace levels of ISO with a linearity ranging from 0.09 to 20.00 μM, with a limit of detection (LOD) of 0.03 μM (S/N=3), which was superior to that of nanomaterial modified ISO electrochemical sensors. The high sensitivity is mainly attributed to the specifically electrocatalytic activity towards ISO catalyzed by hydrogen radical derived from the sulfonic group of Nafion. Additionally, the sensor for detecting ISO in actual test specimens like tomato, lettuce and water in rice field shows ultra-high stability and repeatability together with reproducibility.
研究领域:
分析化学
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环境科学
·
农药检测
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Runqiang Liu,Xuli Hu,Yuanhang Cao,Haotian Pang,Wenlei Hou,Yansheng Shi,Haoming Li,Xinming Yin,Hongyuan Zhao
The unreasonable use of isoproturon (ISO) had caused severe damage to human health and the ecological environment. Herein, an ultrasound-assisted strategy was proposed to construct a novel electrochemical sensor based on acetylene black (AB) nanoparticles for the sensitive determination of ISO. The morphological characterization of AB was investigated by scanning electron microscope (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). AB with pearl-chain-like carbon network exhibited outstanding electrical conductivity and prominent dispersion ability, which could significantly improve the electrochemical detection performance of ISO. The linear range of detecting ISO was 0.5-20 μM with the detection limit of 0.096 μM at the fabricated AB/GCE sensor. Moreover, the fabricated sensor demonstrated good stability, repeatability, and selectivity. The AB/GCE sensor presented acceptable recoveries of 98.21%-102.70% in measuring ISO in tomato and water samples. This work lays an essential foundation for using AB nanoparticles to develop high-performance ISO sensor.
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
WATER RESEARCH
·
2021
·
IF 11.236
Jiaxin Lu,Yuefei Ji,Jean-Marc Chovelon,Junhe Lu
Fluoroquinolone (FQ) antibiotics are a group of contaminants of emerging environmental concern. In the present study, we demonstrated that norfloxacin (NORF) and ofloxacin (OFLO), two typical FQs, have photochemical reactivity analogous to chromophoric dissolved natural organic matter (DOM) in surface waters and can sensitize the photodegradation of isoproturon (IPU), a phenylurea herbicide. Such photochemical reactivity is ascribed to the quinolone chromophore that is excited to a triplet state ( 3 FQ*) upon UV-A irradiation. 3 FQ* further reacts with dissolved oxygen to give rise to singlet oxygen. 3 FQ* steady-state concentrations of 6.72 × 10 −15 and 1.27 × 10 −15 M were measured in 10 μM NORF and OFLO solutions, respectively, under UV 365nm irradiation. The degradation of IPU was due to the reaction with 3 FQ*, with bimolecular rate constants of 6.07 × 10 9 and 1.51 × 10 10 for 3 NORF* and 3 OFLO*, respectively. Intriguingly, NORF and OFLO per se were unstable and photolyzed during UV-A irradiation, but the photochemical reactivities of the solutions were not lost accordingly. High-resolution mass spectrometry analysis revealed that defluorination and piperazine moiety oxidation were the main photolysis pathways, while the core quinolone structure remained intact. Thus, the photolysis products largely inherited the photochemical reactivity of the parent compounds. Since all FQs share the same quinolone structure, similar photochemical reactivity is expected. The presence of FQs in surface water would affect the transformation and fate of coexisting compounds. To the best of our knowledge, this is the first study examining the environmental behavior of FQs as photosensitizers. The findings greatly advance the understandings of the influence of FQs in aquatic environment.
研究领域:
环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2020
·Vol. 13
·期 4
·839-849
·
IF 2.667
Zhou Ying,Cheng Fuliang,Hong Yanping,Huang Jianping,Zhang Xue,Liao Xiaoning
Isoproturon (ISO), an herbicide belonging to the phenyl urea family, is extensively used in modern agriculture to guarantee a bumper harvest. However, it has been evidenced that the ISO has heavy toxicity to the liver system and appears to be a tumor promoter. It is therefore urgent to develop sensitive and selective methods to screen its presence in food resources to meet the ever-increasing pollution restrictions. In this work, an electrochemical sensor based on graphene oxide–modified multi-walled carbon nanotubes hybrid material was firstly developed for the rapid and sensitive detection of ISO via square wave voltammetry (SWV). Under optimized experimental conditions, the sensor exhibits a relatively wide linear range from 0.30 to 15.0 μmol L −1 , a low limit of detection (LOD) of 0.10 μmol L −1 , as well as good repeatability, high reproducibility, excellent selectivity, and long-term stability. The sensor has also been successfully employed in various real samples such as rice field water, tomato, and lettuce analyses. The obtained recoveries are in the range of 97.33–105.0% with low relative standard deviation (less than 2.5%), which is very close to the results of the high-performance liquid chromatography (HPLC), showing the proposed electrochemical sensor has great potential in practical applications.
研究领域:
农业科学
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分析化学
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环境科学
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
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2022
·Vol. 29
·期 3
·629-640
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IF 2.523
Li Dongdong,Hu Xuli,Zhao Hongyuan,Ding Kunjie,Li Fang,Han Shixing,Wang Hongliang,Bai Lianyang,Liu Runqiang
Carbonaceous nanomaterials have exhibited huge practical prospects as conductive sensitizers for the modification of electrodes. In this work, the nanocomposite of graphitized multi-walled carbon nanotubes@Super P Li carbon nanoparticles (GCNTs@SP-Li) was designed via a simple ultrasonication-assisted strategy, and then the GCNTs@SP-Li/GCE sensor based on the synthesized GCNTs@SP-Li nanocomposite decorating glassy carbon electrode (GCE) was successfully applied in the sensitive detection of isoproturon (ISO). For the GCNTs@SP-Li nanocomposite, GCNTs with porous structure presented excellent adsorption property, which contributed to the preconcentration of ISO and facilitated the electrolyte penetration. Additionally, GCNTs possessed good electrical conductivity owing its higher graphitization degree. More importantly, the interconnected dot-line-like structure of GCNTs@SP-Li nanocomposite acted as conductive “highways” to remarkably reduce the electron transport distance, which could significantly accelerate the process of redox reaction. Benefiting from the synergistic effect of GCNTs and SP-Li, the optimized GCNTs@SP-Li/GCE sensor showed a low detection limit of 0.1653 μM in the linear concentration of 0.7–30 μM. Additionally, the proposed sensor exhibited satisfactory recoveries from 97.2 to 101.6% towards the determination of ISO in river water and tap water. This work offers a feasible and cost-effective idea in developing the high-performance ISO electrochemical sensor.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 12
·35214-35222
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IF 5.19
Zhang Hongyu,Wu Shouying,Zhang Ying,Mao Zhiping,Zhong Yi,Sui Xiaofeng,Xu Hong,Zhang Linping
Catalytic degradation is a promising and ideal technology in environmental remediation. Among them, catalytic oxidation and photocatalysis respectively based on catalysts and photocatalysts both trigger broad interests because of their high removal activity. However, the reusability of the powder catalysts still faces substantial challenges. Here, a simple strategy is proposed to load Fe-BTC catalyst on aramid fabrics (AF) to construct Fe-BTC MOF @ aramid fabric (Fe-BTC@AF) composite materials with layer-by-layer in situ self-assembly methods. The experimental results illustrated that 98% isoproturon could be removed by Fe-BTC@AF 20 with oxidant H 2 O 2 , while the single Fe-BTC@AF 20 could photo-degrade 99% isoproturon within 7 h. Meanwhile, it could sustain a high degradation rate of more than 80%, even if it had gone through 5 degradation cycles. Thus, the Fe-BTC@AF composite has a significant advantage in the recycling ability for degradation of isoproturon, which will have potential applications in the efficient removal of organic contaminants in water.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haiyan Wang,Peizeng Yang,Yiqian Song,Deyang Kong,Junhe Lu
UV-based treatment technologies have been widely applied in wastewater treatment plants due to its high efficiency in deactivating pathogens and degrading organic contaminants. However, this study demonstrates that N -nitrosodimethylamine (NDMA), a probable human carcinogen, can be generated during UV treatment of dimethylamine (DMA) pollutants of concern, for example isoproturon (IPU), in the presence of nitrite (NO 2 – ). Quenching tests have identified that in addition to direct photolysis, hydroxyl radicals (HO • ) and nitrogen oxide radicals (NO • and NO 2 • ) generated from NO 2 – photolysis play a crucial role in the reaction. They can react with IPU, leading to hydroxylated and nitrated products. More importantly, NO 2 • couples with a NO • or another NO 2 • to form N 2 O 3 and N 2 O 4 , respectively. As nitrosating agents, N 2 O 3 and N 2 O 4 directly attack the released DMA during IPU degradation, yielding NDMA. At IPU initial concentration of 50 μM, the highest concentration of NDMA was 5.62 μg/L in 2.5 h by UV/NO 2 – , corresponding to the molar yield of 0.22%. This study further reveals that other dimethylamine compounds, such as diuron, imipramine, and tetracyclines, can also serve as NDMA precursors during UV disinfection with NO 2 – present. Given that many environmental contaminants contain DMA moieties and NO 2 – is ubiquitously present in wastewaters, formation of NDMA during UV disinfection is probably a common but overlooked problem, which deserves emerging concern.
研究领域:
环境科学
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水处理
·
化学工程
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毒理学
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产品关联
DOI
高影响因子
Agronomy-Basel
·
2023
·Vol. 13
·期 1
·216
·
IF 3.7
Guangtao Zhu,Hao Wang,Haitao Gao,Ying Liu,Jun Li,Zhike Feng,Liyao Dong
Italian ryegrass (Lolium multiflorumL.), a cross-pollinated grass, is gradually becoming a predominant weed in wheat fields in China and is evolving resistance to many groups of herbicides. The aim of this study is to determine the resistance levels of a singleL. multiflorumpopulation from a wheat field in Henan Province China, to three modes of action (MoAs) of herbicides and to further characterize the potential resistance mechanisms. ThisL. multiflorumpopulation evolved multiple herbicide resistances to pyroxsulam [acetolactate synthase (ALS)], pinoxaden [acetyl-CoA carboxylase (ACCase)] and isoproturon [photosystem II (PSII)]. Target-site resistance (TSR) mutations (Pro-197-Gln, Pro-197-Thr, and Trp-574-Leu) and non-target-site resistance (NTSR) mediated by cytochrome P450 monooxygenase (CYP450) genes were associated with pyroxsulam resistance. Pinoxaden resistance was conferred by two TSR mutations, which referred to a rare Ile-2041-Val mutation and a common Ile-1781-Leu mutation but with two different nucleotide substitutions (CTA/TTA). CYP450- and glutathione-S-transferase (GST)-mediated resistances were the main resistance mechanisms for this multiple herbicide-resistant (MHR) population to the PSII inhibitor isoproturon. This is the first case of a singleL. multiflorumpopulation evolving multiple resistance to three herbicide MoAs (ALS, ACCase and PSII) in China. Diverse resistance mechanisms including TSR and NTSR meanL. multiflorumexhibits a high degree of resistance plasticity.Keywords:Lolium multiflorumL.;pyroxsulam;pinoxaden;isoproturon;multiple herbicide resistance;TSR;CYP450;GST
研究领域:
植物学
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农学
·
杂草科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Haiyan Wang,Sunxinyi Wang,Zixuan Jia,Hao Li,Jiayu Wang,Teng Zhang,Jiayue Dong,Peizeng Yang,Jing Chen,Yuefei Ji,Junhe Lu
Isoproturon (IPU), a widely utilized phenylurea herbicide, is recognized as an emerging contaminant . Previous studies have predominantly attributed the degradation of IPU in natural waters to indirect photolysis by natural organic matter (NOM). Here, we demonstrate that nitrite (NO 2 − ) also serves as an important photosensitizer that induces the photo-degradation of IPU. Through radical quenching tests, we identify hydroxyl radicals (•OH) and nitrogen dioxide radicals (NO 2 • ) originating from NO 2 − photolysis as key players in IPU degradation, resulting in the generation of a series of hydroxylated and nitrated byproducts. Moreover, we demonstrate a synergistic effect on the photo-transformation of IPU when both NOM and NO 2 − are present in the reaction mixture. The observed rate constant ( k obs ) for IPU removal increases to 0.0179 ± 0.0002 min −1 in the co-presence of NO 2 − (50 μM) and NOM (2.5 mg C /L), surpassing the sum of those in the presence of each alone (0.0135 ± 0.0004 min −1 ). NOM exhibits multifaceted roles in the indirect photolysis of IPU. It can be excited by UV and transformed to excited triplet states ( 3 NOM*) which oxidize IPU to IPU •+ that undergoes further degradation. Simultaneously, NOM can mitigate the reaction by reducing the IPU •+ intermediate back to the parent IPU. However, the presence of NO 2 − alters this dynamic, as IPU •+ rapidly couples with NO 2 • , accelerating IPU degradation and augmenting the formation of mono-nitrated IPU. These findings provide in-depth understandings on the photochemical transformation of environmental contaminants , especially phenylurea herbicides, in natural waters where NOM and NO 2 − coexist.
研究领域:
环境科学
·
化学
·
水处理
·
光化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Zilu Wang,Minghao Jiang,Fan Yin,Mali Wang,Jinfang Jiang,Min Liao,Haiqun Cao,Ning Zhao
Alopecurus aequalis Sobol. is a predominant grass weed in Chinese winter wheat fields, posing a substantial threat to crop production owing to its escalating herbicide resistance. This study documented the initial instance of an A. aequalis population (AHFT-3) manifesting resistance to multiple herbicides targeting four distinct sites: acetyl-CoA carboxylase (ACCase), acetolactate synthase, photosystem II, and 1-deoxy-d-xylulose-5-phosphate synthase. AHFT-3 carried an Asp-to-Gly mutation at codon 2078 of ACCase, with no mutations in the remaining three herbicide target genes, and exhibited no overexpression of any target gene. Compared with the susceptible population AHFY-3, AHFT-3 metabolized mesosulfuron-methyl, isoproturon, and bixlozone faster. The inhibition and comparison of herbicide-detoxifying enzyme activities indicated the participation of cytochrome P450s in the resistance to all four herbicides, with glutathione S-transferases specifically linked to mesosulfuron-methyl. Three CYP72As and a Tau class glutathione S-transferase, markedly upregulated in resistant plants, potentially played pivotal roles in the multiple-herbicide-resistance phenotype.
研究领域:
植物科学
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杂草科学
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分子生物学
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生物化学
✓ 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）