Scientific Reports
·
2016
·Vol. 6
·期 1
·1-7
·
IF 5.228
Jin Xiaoting,Yu Xiangyang,Zhu Guangyan,Zheng Zuntao,Feng Fayun,Zhang Zhiyong
A high capacity of laccase from Trametes versicolor capable of degrading pesticides has been revealed. The conditions for degrading of five selected pesticides including chlorpyrifos, chlorothalonil, pyrimethanil, atrazine and isoproturon with the purified laccases from Trametes versicolor were optimized. The results showed that the optimum conditions for the highest activity were pH at 5.0 and temperature at 25 °C. The best mediators were violuric acid for pyrimethanil and isoproturon, vanillin for chlorpyrifos, and acetosyringone and HBT for chlorothalonil and atrazine, respectively. The laccase was found to be stable at a pH range from 5.0 to 7.0 and temperature from 25 to 30 °C. It was observed that each pesticide required a different laccase mediator concentration typically between 4.0–6.0 mmol/L. In the experiment, the degradation rates of pyrimethanil and isoproturon were significantly faster than those of chlorpyrifos, chlorothalonil and atrazine. For example, it was observed that pyrimethanil and isoproturon degraded up to nearly 100% after 24 hours while the other three pesticides just reached up 90% of degradation after 8 days of incubation.
研究领域:
环境生物学
·
酶学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Yuqi Li,Jian Chen,Wenjing Luo,Shujie Zhang,Baotong Li,Wenwen Zhou
As new pesticides are continually introduced into agricultural systems, understanding their environmental behavior and potential toxicity effects is crucial for effective risk assessment. This study utilized QuEChERS and UPLC-QTOF-MS/MS techniques to analyze Tiafenacil (TFA) and its six hydrolysis products (HP1 to HP6) in water, marking the first comprehensive report on these degradation products. Calibration curves demonstrated strong linearity (R 2 ≥ 0.9903) across concentrations ranging from 0.02 to 3.50 mg L −1 . TFA's hydrolysis followed single first-order kinetic (SFOK) model, with rapid degradation observed under alkaline and high-temperature conditions, resulting in half-lives ranging from 0.22 to 84.82 days. The ECOSAR model predicts that TFA's hydrolysis products exhibit acute and chronic toxicity to fish, Daphnia, and green algae. Additionally, hydrolysis products HP1, HP5, and HP6 were detected in irrigation water from citrus orchards, posing higher predicted toxicity risks to fish and green algae. This highlights the necessity for further risk assessments considering transformation products. Overall, this study enhances our understanding of TFA's environmental fate and supports its safe agricultural application and monitoring practices.
研究领域:
环境科学
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毒理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Haoran Song,Shiting Pan,Yuwei Wang,Yang Cai,Wei Zhang,Yongming Shen,Changping Li
There exists an obvious contradiction between Cu(III) generation and Cu(I) contribution in reductants enhanced Cu(II)/peroxymonosulfate (PMS) process because the involved electron transfer pathways were always ignored in previous studies. This study investigated the MXene-mediated electron transfer mechanism in Cu(II)/PMS for the first time. The introduction of MXene significantly promoted atrazine degradation under acidic condition because the in-situ generation of Cu(I) was an excellent activator for PMS. Under alkaline condition, although addition of MXene generated a large amount of Cu(I), the degradation of atrazine was inhibited due to that the conversion of Cu(I) to Cu(III) was interrupted. The strong metal-support interaction (SMSI) altered the reactive intermediate species from Cu(III) (two-electron transfer) to hydroxyl radical (HO • ) and sulfate radical (SO 4 •- ) (one-electron transfer) under alkaline condition. This work proposed a novel MXene-mediated electron transfer mechanism and improved the understanding of Cu(III)/Cu(I) transformation pathway.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yingguan Xiao,Jiajing Wu,Huiquan Li,Xiang Liu,Qian Li,Ying Zhang,Shunsheng Cao
Constructing phase junction is an effective strategy to increase photocatalytic performance of titanium dioxide (TiO 2 ) because it can promote charge separation. However, both low surface area and unstable phase interface limit its further application. In this investigation, we introduce a structural regulation strategy to prepare anatase/rutile TiO 2 (A/R–TiO 2 ) hollow photocatalyst through in-situ growth of rutile TiO 2 on anatase TiO 2 hollow microspheres byheat treatment. The as-synthesized A/R–TiO 2 photocatalyst was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet–visible (UV–vis) spectroscopy. The results reveal that the A/R–TiO 2 hollow photocatalyst significantly promotes efficient charge separation due to the intimate contact of two phases within a single hollow sphere. Notably, A/R–TiO 2 exhibits more efficient than commercial TiO 2 (P25) towards the photodegradation of various pesticide pollutants, which suggests that such a structural design can be an effective method for rationally constructing TiO 2 -based photocatalyst with advanced performance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Liying Yang,Xinyu Yang,Jiatai Guo,Zhengyi Yang,Yuhang Du,Qiqi Lu,Guohua Zhong
Managing invasive plant presents a significant challenge to both the environment and the economy. There is an opportunity to address this issue by utilizing invasive plants as a sustainable and cost-effective source of valuable functional materials for environmental remediation. In this study, a promising Mikania micrantha biochar (MB) was synthesized by pyrolyzing an invasive plant, which was utilized for bacterial immobilization and adsorption of contaminants. By embedding Proteus terrae ZQ02-MB within a polyvinyl alcohol-sodium alginate gel to create a biochar-modified bacterial microsphere (BBM), the superior degradation of pesticide contaminants was observed. Taking chlorothalonil (CHT) as an example, field experiments demonstrated that BBM achieved a removal efficiency of 59.8% by the third day. Additionally, BBM not only improved the richness and diversity of soil bacteria but also enhanced the microbial community structure by the seventh day. On this basis, the adsorption capacity of MB, biofilm growth promoting ability of BBM, and the CHT mineralization ability of strain ZQ02 were validated as a joint mechanism to promote efficient CHT removal. Overall, this study proposes a composite model of invasive plant-derived biochar loaded microorganisms, which has great potential in eliminating pollutant residues and paves new paths to develop strategies for reusing invasive species resources.
研究领域:
环境科学
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微生物学
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产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-14
·
IF 3.8
Sun Caixia,Liu Yuhong,Bei Ke,Zheng Weiran,Wang Qinfei,Wang Qiang
A 28 days pesticide degradation experiment was conducted for broccoli ( Brassica oleracea L. var. italica Planch) and pakchoi ( Brassica chinensis L.) with three pesticides (chlorantraniliprole (CAP), haloxyfop-etotyl (HPM), and indoxacarb (IXB)) to explore the effects of biochar on pesticide environmental fate and rhizosphere soil diversity. Rice straw biochar (RB) was applied to soil at a 25.00 t ha −1 dosage under greenhouse conditions, and its effects on the degradation of three pesticides in vegetables and in soil were investigated individually. Overall, RB application effectively facilitated CAP and HPM degradation in broccoli by 13.51–39.42% and in broccoli soil by 23.80–74.10%, respectively. RB application slowed the degradation of CAP, HPM and IXB in pakchoi by 0.00–57.17% and slowed the degradation of CAP in pakchoi by 37.32–43.40%. The results showed that the effect of RB application on pesticide degradation in crops and soil was related to biochar properties, pesticide solubility, plant growth status, and soil characteristics. Rhizosphere soil microorganisms were also investigated, and the results showed that biochar application may be valuable for altering bacterial richness and diversity. The effect of biochar application on pesticide residues in crops and soil was influenced by the vegetable variety first, and the second was pesticide characteristics. RB applied to soil at a 25.00 t ha −1 dosage under greenhouse conditions is recommended for broccoli production to ensure food safety. Our results suggested that biochar application in soil could reduce pesticide non-point source pollution, especially for highly soluble pesticides, and could affect soil microorganisms.
研究领域:
农业科学
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环境科学
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微生物学
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DOI
PubMed
高影响因子
CHEMOSPHERE
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2022
·
IF 8.943
Yingjie Wen,Xu Chen,Linfeng Su,Shuqian Dong,Li Yi,Peilei He,Wen Yang,Zhiyi Lu
The catalytic ozonation-based advanced oxidation process (AOP) is applied to remove nondegradable chemical oxygen demand (COD), while the application in industry is limited by the economics and activity of catalysts. In this study, we demonstrate that by taking atrazine (ATZ) as a model pollutant, the removal rates of catalytic ozonation were negatively correlated with the interlayer water content of metal-modified montmorillonite (M x @MMT), instead of the loadings metals. Among the modified MMT, Zn 0.1 @MMT achieved 83.2% degradation of ATZ within 15 min, and corresponding removal rates of COD and total organic carbon (TOC) reached 40.3% and 46.5%, respectively. Detailed EPR and quenching experiments identified that hydroxyl radicals (HO•) were the main reactive oxygen species and QTOF/MS/MS analysis helped to propose a possible degradation pathway of ATZ. Moreover, the catalytic performance of Zn 0.1 @MMT under different conditions was also systematically evaluated.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2024
·
IF 5.8
Shoaib Khan,Aoxue Wang,Jiayin Liu,Iltaf Khan,Samreen Sadiq,Aftab Khan,Waleed Yaseen,Saeed Zaman,Abdul Mueed,Yuanyang Miao
Over the past few years, nanotechnology and nanomaterials have played a crucial role in the agriculture sector. Notably, among different types of nanomaterials, metal–organic frameworks (MOFs) have attracted significant attention owing to their porosity, organic composition, biocompatibility, and tailored structural and compositional properties. In this research work, we have effectively prepared four types of MOFs including ZIF-8, ZIF-67, PFC 6, and PFC-7. Interestingly, among all the prepared MOFs, ZIF-67 exhibited exceptional performance. With the aim to further improve the efficacy of ZIF-67, we decorated it with SnO2. Among the as-prepared samples, the optimal sample 5SnO2/ZIF-67 nanocomposite exhibited exceptional efficiency in terms of its high chemical and thermal stability, large surface area, selective antipathogenic activities, high catalytic activities, and disease resistance properties. Based on our various characterization techniques, such as XRD, DRS, PL, FS, BET, FT-IR, and RAMAN, it has been confirmed that the incorporation of SnO2 into ZIF-67 leads to adjustments in band gaps, enhanced stability, modulated photo-electrons, large surface area, abundant active sites, and upgraded adsorption and selectivity for antipathogenic and pesticide degradation activities. As compared to pure ZIF-67, the most active sample 5SnO2@ZIF-67 showed ∼4.5 and ∼2.6 times significant improvement for glyphosate (GLY) and acephate (ACPH) degradation, respectively. Remarkably, our prepared samples also offered potent performances against various pathogens in Luria–Bertani medium. Based on the scavenger tests, ·OH and O2− are respectively responsible for GLY and ACPH decomposition. Accordingly, the activity improvement mechanism and biochemical pathways are proposed. Finally, our novel research work will provide a gateway for the fabrication of MOF-based green nanomaterials that will unlock a wide range of opportunities and applications in antipathogenic and pesticide degradation activities and tomato plant growth.
研究领域:
农业科学
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
·
IF 6.789
Ting Yu,Hengyan Ma,Hui Zhang,Minghua Xiong,Yuan Liu,Feng Li
The fragility and high cost of enzymes represent critical challenges limiting their practical application in the removal of pesticides. Herein, an aryloxyphenoxypropionate herbicide-hydrolyzing enzyme, QpeH, was purified via one-step affinity chromatography and embedded into two types of zeolitic imidazolate frameworks (ZIFs) through biomimetic mineralization . The catalytic activity towards the herbicide quizalofop-P-ethyl, the loading capacity and efficiency of the resulting two composites, QpeH@ZIF-10 with cruciate flower-like morphology and QpeH@ZIF-8 with rhombic dodecahedral morphology, were compared. Both composites had excellent stability and reusability after 10 reuse cycles, with QpeH@ZIF-10 having a better performance. More importantly, when applied for the removal of quizalofop-P-ethyl pollution in the watermelon field, QpeH@ZIF-10 (88%) showed a remarkably improved degradation efficiency compared to QpeH@ZIF-8 (84%) despite the latter having a greater loading capacity. Finally, the use of QpeH@ZIF composites was shown to recover the bacterial community in soil. This work provides a new insight into the low-cost synthesis of nanobiocatalysts combining simple purified enzymes and metal-organic frameworks (MOFs) for the remediation of pesticide-contaminated soils.
研究领域:
环境科学
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生物技术
✓ 已验证
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2012
·
IF 5.625
Hongying Zhao,Yujing Wang,Yanbin Wang,Tongcheng Cao,Guohua Zhao
A novel electro-Fenton (E-Fenton) system with the Fe 3 O 4 @Fe 2 O 3 /activated carbon aerogel (ACA) composite cathode was firstly constructed in this study. Its application on degrading imidacloprid exhibited highly catalytic efficiency over a wide applicable pH range from 3 to 9. The removal of imidacloprid and TOC achieved to 90% within 30 and 60 min, respectively. The nature of composite cathode was examined by BJH, XRD, SEM, TEM, XPS and FTIR techniques. ACA with high surface area of 2410 m 2 g −1 and multiplicated porosities composed of micropores and mesopores worked not only as cathode but also as Fenton catalyst support, enhancing oxidation activity. We proposed reasonable E-Fenton oxidation mechanisms with Fe 3 O 4 @Fe 2 O 3 /ACA cathode at acidic and basic conditions. At pH 3, it followed a Haber–Weiss mechanism that the dissolved iron ions and surface Fe(II) sites catalyzed the decomposition of H 2 O 2 to generate hydroxyl radicals ( OH). While at pH 9, it was expected the formation and deactivation of H 2 O 2 complex as well as the catalytic decomposition of H 2 O 2 with surface Fe(III) and Fe(II) sites to produce both superoxide anion ( O 2 − /HO 2 ) and hydroxyl radicals ( OH), involving an in situ recycling of iron oxide (FeO·Fe 2 O 3 → Fe 2 O 3 ).
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
·
2019
·Vol. 95
·期 3
·207-213
·
IF 1.429
Fan Ying,Gao Ruihan,Jiang Yangming,Bian Bing,Tao Zhu,Wei Gang,Xiao Xin
In this work, we report a conceptual strategy for preventing pesticide degradation using cucurbit[n]uril to encapsulate pyroquilon (Pyn). The host–guest inclusion complexes of pyroquilon (Pyn) with CB[7] and CB[8] were prepared and characterized using 1 H NMR spectroscopy, quadrupole-time of flight mass spectrometry (Q-TOF), isothermal titration calorimetry (ITC) and UV absorbance spectrophotometry. The experimental results revealed that the entire Pyn molecule resides within the cavities of CB[7] and CB[8], forming 1:1 inclusion complexes between CB[n] and Pyn. Our study on the release of Pyn demonstrated that CB[n]@Pyn exhibit sustained- and slow-release properties. Moreover, CB[8] can effectively shield UV irradiation and thereby protect the Pyn from photodegradation. Therefore, CB[7]@Pyn and CB[8]@Pyn have great potential to be used as slow-release agents.
研究领域:
化学
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材料科学
·
农业科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）