GREEN CHEMISTRY
·
2021
·Vol. 23
·期 12
·4560-4566
·
IF 10.182
Yunhao Gao,Zhiyuan Zhou,Xi Chen,Yuyang Tian,Yan Li,Huachen Wang,Xuan Li,Xueyang Yu,Yongsong Cao
Volatilization and leaching are two critical pathways for pesticide transportation from their applied areas to non-target regions. Nanocarrier-based formulations can improve the use efficiency and reduce the off-target effects of pesticides, however, the complicated preparation process seriously restricts the large-scale application of nanopesticides in the agricultural field. In this work, taking 2-(2,4-dichlorophenoxy) acetic acid (2,4-D), 2-methyl-4-chlorophenoxyacetic acid (MCPA), and 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) as model herbicides, herbicide-intercalated Zn–Al hydrotalcites (herbicide@HTlcs) were facilely fabricated by a modified co-precipitation method without heating, aging, organic solvents, and inert gas. The obtained herbicide@HTlcs showed high entrapment efficiencies (71.7%–86.7%), a sheet structure with an average size of 339.4 nm, and positive surface charges (+40.5). The volatilities of herbicide@HTlcs were reduced more than 3-fold compared with those of pure herbicides. The release rates of 2,4-D@HTlcs were in line with the selectivity sequence of HTlcs for the anions and controlled by non-Fickian diffusion. The leaching experiments performed in two agricultural topsoils collected from Beijing and Yunnan province and a grassland soil from Neimenggu province all demonstrated that the developed 2,4-D@HTlc nanosheets could evidently retard 2,4-D leaching through the soil. Additionally, 2,4-D@HTlcs exhibited no delay in the control efficacy against Amaranthus retroflexus compared with free 2,4-D sodium salt. This study provides a novel insight into the facile fabrication of controlled release formulations of pesticides that can reduce the volatilization and leaching risks simultaneously.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2017
·
IF 3.154
Zhongxiang Xiao,Chang Le,Zhenghao Xu,Zhefeng Gu,Junfei Lv,Imran Haider Shamsi
Leaching of allelochemicals in soil is one of the fundamental processes that determines allelopathic activities but is often overlooked. In the present study, the vertical leaching of seven putative allelochemicals as well as one pesticide and one herbicide was investigated using polyvinyl chloride columns combined with a bioassay approach. The results indicated that the leachability of pretilachlor and imidacloprid were the best (Lf > 0.8), followed by vanillin and coumarin (Lf > 0.6). The leachability of daidzein, menthol, and m-tyrosine were medium (0.3 < Lf < 0.6). The lowest leachability has been observed on p-coumaric and p-hydroxybenzoic acids (Lf < 0.3). The chemicals were classified into three clusters according to the phospholipid fatty acid profile (i.e., vanillin in one cluster, coumarin and menthol in the second cluster, and the rest in the third cluster). Bioactivities of the chemicals changed dramatically. Germination of lettuce seeds was suppressed by imidacloprid and pretilachlor, and the suppression was concentration-dependent. The bioactivity of most of the allelochemicals were progressively decreased with the downward movement of chemicals. The results indicated that leaching mediated the microbial communities and the interactions of chemical–microorganism and modified the bioavailability of allelochemicals in soil.
研究领域:
生态学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaoxu Ma,Mingxin Liu,Yanzhen Chen,Qiliang Huang,Chong Cao
Dinotefuran (DIN) contaminates groundwater and is toxic to bees, so designing a novel pesticide loading system for dinotefuran is of great significance. In this paper, dinotefuran was loaded into TpBDMe COF with a mesoporous hollow structure, and the TpBDMe COF loaded with dinotefuran exhibited initial burst and subsequent sustained release behavior. The results showed that the product effectively suppresses wheat aphid development, with virtually no infestation occurring for 7–14 days, whereas other commercially available formulation had lost their usefulness. Our TpBDMe COF carrier effectively immobilizes dinotefuran, reducing pesticide leaching in soil by 70 % and enhancing the application efficiency of neonicotinoid insecticides. The LD 50 of this product for acute exposure of honey bees doubled the LD50 of the original furosemide at 24 h and was equally effective at 48 h, reducing the toxicity to bees and promoting ecological safety. The results of this work show that this nanocarrier system is highly stable, loadable, insecticidal active, and environmentally friendly, showing great potential in the development of new nanocarriers for use.
研究领域:
环境科学
·
农业科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
AGRICULTURAL WATER MANAGEMENT
·
2023
·
IF 6.7
Lingyun Chen,Ziyi Hu,Wenhui Chen,Ziwei Xu,Can Hao,Prakash Lakshmanan,Dunyi Liu,Xinping Chen
The high loss of foliar-applied fertilizers in the wet season and other extreme weather conditions reduces fertilizer use efficiency remarkably low. Emerging nano-iron materials, owing to their highly desirable properties such as exceptionally small size, particle surface and interface attributes, strong adhesion and high iron ratio, could overcome the limitations of traditional fertilizers. However, their anti-leaching property, leaching resistance mechanism, iron nutrition enrichment capacity and cost effectiveness remain unclear. In this study, four nano-iron materials (Fe nanoparticles (Fe-NPs), Fe 3 O 4 -NPs, α-Fe 2 O 3 -NPs and γ-Fe 2 O 3 -NPs) were compared with traditional iron fertilizers (FeSO 4 and Fe-EDTA). The results showed that the efficiency of traditional iron fertilizers decreased greatly under simulated rainfall conditions due to their poor leaching resistance. In contrast, nano-iron fertilizers performed exceptionally well under simulated rainfall conditions with significant increase in leaf iron concentration, photosynthesis and growth of peanut. This was mainly attributed to their decreased contact angle, increased wetting capacity and increased adhesion on plant surface, which collectively decreased fertilizer leaching remarkably. The adhesion capacity of Fe 3 O 4 -NPs (53.5 mN/m), was nearly three times that of traditional iron fertilizer (18.3 mN/m). Therefore, only a small amount of Fe 3 O 4 -NPs (4 mg/plant) was needed relative to traditional iron fertilizers (FeSO 4 , 59 mg/plant) to achieve comparable high leaf Fe concentration (1076.96 μg/g) under rainfall conditions. Cost evaluation suggests that the cost-competitiveness of Fe 3 O 4 -NPs will become comparable to that of FeSO 4 when its price comes down from the current cost of $139/kg to $36/kg, the cost of FeSO 4 , which is likely considering the pace of nano-material technology development. Together, these results demonstrate the remarkable potential of nano-iron fertilizers in mitigating the escalating fertilizer cost and improving the environmental outcomes of peanut, as well as potentially other crops grown in wet season.
研究领域:
农业科学
·
植物营养学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Shuangchi Li,Ning Wang,Shuiqing Chen,Yuqing Sun,Puwang Li,Jinfang Tan,Xiaoqian Jiang
Phosphate fertilizers have been excessively applied in agricultural production, bringing the risk of phosphorus (P) loss to nearby river systems and low utilization efficiency. In this study, eggshell-modified biochars prepared by pyrolysis of eggshell and corn straw or pomelo peel were applied to soil for enhancing P immobilization and utilization. The structure and properties of modified biochars before and after P adsorption were analyzed using the Brunauer-Emmett-Teller (BET) nitrogen adsorption method, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The eggshell-modified biochar performed an excellent adsorption performance for P (up to 200 mg/g), which was well described by the Langmuir model (R 2 > 0.969), showing monolayer chemical adsorption with homogenous surface. The Ca(OH) 2 appeared on the surface of eggshell modified biochars and changed to Ca 5 (PO 4 ) 3 (OH) and CaHPO 4 (H 2 O) 2 after P adsorption. The release of immobilized P by modified biochar increased with decreased pH. In addition, pot experiments of soybean indicated that the combined application of modified biochar and P fertilizer significantly increased the content of microbial biomass P in soil, raising from 4.18 mg/kg (control group) to 51.6–61.8 mg/kg (treatment group), and plants height increased by 13.8–26.7%. Column leaching experiments showed that P concentration in the leachate decreased by 97.9% with the modified biochar application. This research provides a new perspective that the eggshell-modified biochar could serve as a potential soil amendment for enhancing P immobilization and utilization.
研究领域:
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 8
·1-16
·
IF 3.8
Deng Wenchao,Wang Guanghui,Wang Bing,Deng Nansheng
The contamination of soil with cadmium (Cd) poses a significant risk to both food safety and human health. It is crucial to urgently identify an effective technology for remediating Cd-contaminated soil. In the present study, a novel sulfur modified biochar supported ferrous sulfide (FeS@SBC) composite was fabricated by calcination and hydrothermal method. Indoor culture, column leaching, and pot experiments were employed to examine the immobilization effect of FeS@SBC on Cd in contaminated soil. The outcomes illustrated a significant immobilization effect on the Cd-contaminated soil with the application of FeS@SBC. After incubating the soil with the stabilizer for 28 d, the Cd that was previously highly mobile underwent a transformation into an immobilized state. In the experiment on leaching using simulated acid rain, the treatment with FeS@SBC showed a noteworthy decrease in the cumulative loss and leaching efficiency of Cd when compared to the control experiment. It achieved reductions of 70.9% and 71.6%, respectively. The adsorption and immobilization mechanisms resulted from co-precipitation, ion exchange and surface complexation. In the outdoor pot experiment, after 28 d of growth, the water spinach in contaminated soil treated with FeS@SBC has a better growth compared to the control group, with a biomass increase of 134.95%. Additionally, the values of BCF and TF of Cd decreased by 62.25% and 40.39%, respectively, and the available concentration of Cd in the soil decreased by 23.87%. The FeS@SBC composite shows promise as an effective stabilizer for remediating Cd-contaminated soil.
研究领域:
环境科学
·
土壤修复
·
重金属污染治理
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Peng Lyu,Guanghui Wang,Yelin Cao,Bing Wang,Nansheng Deng
The decommissioning of uranium mill tailings (UMTs) is usually accompanied by uranium (U) contamination in soil, which poses a serious threat to human health and ecological safety. In this study, a novel phosphorus-modified bamboo biochar (PBC) cross-linked Mg–Al layered double-hydroxide (LDH) composite (“PBC@LDH”) was successfully prepared by phosphate pre-impregnation and a hydrothermal method with Mg–Al LDH. Physicochemical analysis revealed that phosphorus-containing functional groups and Mg–Al LDH were grafted onto the pristine biochar (BC) matrix. Laboratory-scale incubation and column leaching experiments were performed on the prepared BC, PBC, and PBC@LDH. The results showed that, at a dosage of 10%, the PBC@LDH composite had a commendable ability to immobilize U in soil. After 40 days of incubation with the stabilizer, the more mobile U was converted into immobilized species. Furthermore, during a column leaching experiment with simulated acid rain, the cumulative loss and leaching efficiency of U were remarkably reduced by PBC@LDH treatment compared with the control, reaching 53% and 54%, respectively. Surface complexation, co-precipitation, and reduction described the adsorption and immobilization mechanisms. In conclusion, this research demonstrates that the PBC@LDH composite offers a potentially effective amendment for the remediation of U contaminated soil.
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Lei Zhang,Xinyu Liu,Jinghan Li,Yanhong Zhu,Yufan Xiao,Jianqiang Zhang,Yang He
In alpine meadow regions, macropore flow is a critical but inadequately understood pathway for antibiotic transport. The complex relationship between macropore structure, flow dynamics, and solute properties presents a significant research gap. Methodological limitations hinder the accurate characterization of solute migration mechanisms due to complex macropore structures. This study investigated sulfadiazine (SD) and florfenicol (FF) migration behaviors in alpine meadow soil using leaching experiments in soil columns with artificially constructed macropores. Findings reveal that while greater macropore flow intensity (> 1.75 cm/h) and connectivity accelerate solute transport, the effect is not linear. A fundamental shift in transport control occurs with changing macropore flow intensity. At lower velocities, solute mobility is primarily controlled by adsorption reactivity, particularly for the strongly reactive SD. Conversely, at high velocities, hydrodynamic dispersion becomes the dominant factor governing the transport. Moderate dispersion (1.7–1.8 cm 2 /h) optimizes retention by increasing adsorption opportunities, while high dispersion (3.06 cm 2 /h) accelerates solute transport and reduces retention. This causes the transport of the strongly reactive SD to become dispersion-driven, significantly narrowing the behavioral differences between it and the weakly reactive FF. This highlights that under certain hydraulic conditions, physical transport processes can override chemical properties in controlling contaminant fate.
研究领域:
环境科学
·
土壤科学
·
水文学
·
污染物运移
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haonan Zhang,Donglai Zhang,Bin Yu,Qiuyu Xiong,Yun Fang,Zifeng Yang,Zerui Li,Jingli Cheng,Jinhao Zhao
The design of intelligent pesticide delivery systems based on the characteristics of soil-borne diseases is of great significance for improving pesticide utilization efficiency and achieving long-lasting disease control. Herein, a cost-effective and degradable functional poly(butylene oxalate) (PBO) material was constructed and applied for the encapsulation of metconazole (MEZ) to develop a sustained-release pesticide delivery system (MEZ@PBO). The optimized MEZ@PBO was mainly distributed within the 200–300 nm range, with a fungicide-loading capacity reaching 55.7%. Release experiments confirmed the regulatory effect of the PBO molecular weight on the release rate, with higher molecular weight resulting in a longer sustained release period, thereby prolonging the duration of efficacy. MEZ@PBO significantly enhances the photostability of the fungicide while preventing pesticide loss caused by leaching. Moreover, pot experiments indicated that MEZ@PBO achieved long-lasting control of the Fusarium crown rot. After 14 days, the inhibition rate against Fusarium crown rot was 37.9 and 22.4% higher than those of the metconazole technical material and commercial formulation, respectively. Biosafety evaluation and degradation tests further confirmed the environmental friendliness and crop safety. This work offers a promising strategy for enhancing the stability, release control, and efficacy of fungicides in sustainable agriculture.
研究领域:
农业化学
·
植物病理学
·
高分子材料科学
·
纳米药物递送
·
可持续农业
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Haris Muhammad,Ting Wei,Geng Cao,ShengHui Yu,XinHao Ren,HongLei Jia,Atif Saleem,Li Hua,JunKang Guo,Yongtao Li
The application of crops straw and biochar in trace metals remediation from the contaminated environment attracted more and more attention during the past decade. Although there has been some review work on the mechanism of trace metals stabilization by crops straw, the effects and mechanisms of interaction among soil indigenous-microbes and crops-straw for trace metal adsorption and stabilization is still unclear. In this study, the dynamic effects along with potential mechanisms of wheat-straw (WS), wheat-straw biochar (WBC) and biologically modified wheat-straw (BMWS) were conducted to investigate the adsorption, leaching behaviour, chemical fractions and bioavailability of cadmium (Cd). The results showed that the biosorption capacity (q e ) was most elevated in the BMWS treatment (14.42 mg g −1 ) as compared to WBC (6.28 mg g −1 ) and WS (4.20 mg g −1 ). The application of BMWS, WBC and WS at the rate of 3% significantly reduced Cd concentration in leachate to 53, 45 and 21% respectively, as compared to control. The addition of BMWS reduced the exchangeable Cd fraction resulted an increase in organic matter and carbonate bound Cd fraction in the soil. The DTPA extractable Cd was significantly decreased by 31.2 and 28.6% with the application of BMWS and WBC at 3% w/w respectively as compared to control. The research results may provide a novel perceptive for the development of functional materials and strategies for eco-friendly and sustainable trace metal remediation in contaminated soil and water by combination of straw and soil-indigenous microorganisms .
研究领域:
环境科学
·
土壤学
·
微生物学
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Yasir Hamid,Lin Tang,Bilal Hussain,Muhammad Usman,Lei Liu,Xuerui Cao,Zaid Ulhassan,Muhammad Bilal Khan,Xiaoe Yang
As arable land has become an important sink for cadmium (Cd), soil is being recognized as a major source of metals to the food chain. It becomes, therefore, essential to investigate metal mobility in contaminated soils and to identify suitable remediation strategies. For this, immobilization of Cd was evaluated in contaminated stagnic anthrosol: S1, gleysol : S2 and fluvisol: S3 under flow through conditions. Ten treatments including control were tested alone or in composite form firstly at natural Cd contents (0.58–0.69 mg kg −1 ). Here, T2 (lime), T5 (biochar) and T10 (composite amendment) were found better in reducing the Cd concentration in the soils’ leachates, so, their efficacy was further investigated in the same soils of higher Cd contents (1 and 2 mg kg −1 imposed by soil spiking). Amendments significantly reduced the leachate metal contents especially in 1 mg kg −1 spiked soils. Characterization of T2, T5 and T10 revealed their structural transformations in all the studied soil types, while active functional groups e.g. C–O, C O, O–H, Si–O–Si, ester and alcoholic groups were notably involved in Cd precipitation or adsorption on amendments surface. Variations in Cd speciation in these soils exhibited the exchange of Cd to more stable fractions with tested amendments. These continuous-flow experiments confirmed the strong efficiency of T2, T5 and T10 in reducing the Cd concentration in the leachate of three soils. This study has strong implications in understanding the role of different amendments in controlling the fate, leaching behavior and immobilization of Cd in diverse soil types.
研究领域:
环境科学
·
土壤学
·
污染控制
·
修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 16
·48248-48259
·
IF 5.8
Pan Zewen,Tang Changyuan,Cao Yingjie,Xuan Yingxue,Zhou Qianyi
The sources and distribution characteristics of three phenolic endocrine-disrupting compounds (EDCs), e.g., alkylphenols (APs) (including nonylphenols (NPs) and 4-t-octylphenol (OP)) and Bisphenol A (BPA), were investigated in the rivers of the Pearl River Delta Region (PRDR) with complex land-use types. The mean concentrations of NPs, OP, and BPA in river water including wet and dry seasons were 87, 6, and 74 ng/L in the agricultural regions ( n = 10), 135, 7, and 61 ng/L in the transitional regions ( n = 8), and 249, 15, and 152 ng/L in the urban regions ( n = 28). Contents of NPs and BPA were high in the river sediments (ranged from 7 to 3048 ng/g and 2 to 271 ng/g, respectively). Equilibrium analysis results suggested that sediment release was not the main source of the river EDCs. Principal component analysis (PCA) showed that sewage was the major source of EDCs in the dry season, while the leaching effect of rainfall on the agricultural soils, urban roads, and commercial products was an important source in the wet season. Furthermore, the ratio of APs and total concentration of phenolic EDCs (ΣEDCs) was used to characterize the agricultural regions and urban regions in the PRDR. The ratio was less than 0.6 in the agricultural regions while the ratio was large than 0.6 in the dry season and less than 0.6 in the wet season in urban regions. BPA and NPs in transitional region and urban region had small/medium potential risk to aquatic organisms.
研究领域:
环境科学
·
化学工程
·
水资源管理
·
生态毒理学
✓ 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）