Agriculture-Basel
·
2023
·Vol. 13
·期 7
·1282
·
IF 3.6
Yuchen Liu,Liming Yao,Beibei Hu,Ting Li,Hongzhe Tian
The removal of or decrease in pesticide residues in soil has attracted considerable attention, due to the serious pollution of pesticides in soil. The purpose of the study was to explore the adsorption behavior of biochar on pesticides and the impact on the degradation of pesticide residues in soil, providing a basis for the remediation of soil by biochar. Biochars were prepared via pyrolysis of rice straw at a high temperature (300 °C, 400 °C, 500 °C, 600 °C). The individual and competitive adsorption of three triazine herbicides, prometryn, atrazine, and simazine, on biochar was investigated, and the degradation of the herbicide residues in biochar-added soil was determined. The selected herbicides presented similar adsorption characteristics to rice straw biochar, and the amount of herbicides adsorbed increased with higher preparation temperature and the amount of biochar. The rice straw biochar adsorbed the studied herbicides simultaneously, and the adsorption amount decreased as follows: simazine > atrazine > prometryn. The competition adsorption of the selected herbicides on the biochar presented a lower adsorption affinity than that when they are adsorbed individually. The adsorption isotherm was best fitted by the Freundlich model. The half-lives of prometryn, atrazine, and simazine were 9.8~12.6 d, 5.2~8.1 d, and 3.7~5.6 d, respectively. Biochar addition increased the degradation of the evaluated herbicides in soil. The rice straw biochar could be the potential sorbents that can be implemented for the removal of pesticides.Keywords:adsorption;biochar;degradation dynamics;triazine herbicides
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Piotr Rychter,Kamila Lewicka,Małgorzata Pastusiak,Marian Domański,Piotr Dobrzyński
Nowadays, researchers in the field of agrochemicals are trying to find effective methods to limit the excessive usage of pesticides and protect the environment. One of the most popular and promising techniques is the immobilization of pesticides using environment-friendly polymers. In the conducted research, it was demonstrated that the family of lactide/glycolide copolymers are unsuitable for this purpose due to very slow degradation in the soil. We examined influence of relatively small content of PEG blocks in newly synthesized poly( l -lactide-co-glycolide)-poly(ethylene glycol)–poly( l -lactide-co-glycolide) (PLGA–PEG–PLGA) on the degradation in soil, in activated sludge and usefulness of this terpolymers as a biodegraded carrier for the controlled release of two commonly used herbicides (Metazachlor and Pendimethalin). Presence of even small amount of PEG block in the terpolymer chain increases slightly the hydrophilicity of the polymeric chain, thereby increasing its susceptibility to hydrolytic and unexpectedly strongly to enzymatic degradation in soil environment. The amorphism of used as a carriers PLGA-PEG-PLGA terpolymers and the lack of the phenomenon of increasing the degree of crystallinity during degradation allow to achieve uniform progress of degradation, and thus is obtained a relatively constantly release of tested herbicides. In this way, it is possible to determine the optimal profile of degradation of polymer in soil and proper rate of diffusion and leaching of active agents which allows the release of herbicides in optimal and effective doses within 3–4 months of its application.
研究领域:
农业科学
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高分子化学
·
环境科学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 19
·2890-2896
·
IF 1.9
Zhuangwei Zhou,Yujie Zhang,Jingyan Kang,Chen Dong,Ningyi Chen,Xing Li,Zhiyong Guo,Aiguo Wu
In this study, a new detection method for glyphosate (GPS) based on an anti-aggregation mechanism by using gold nanoparticles (AuNPs) is proposed. A certain amount of Pb2+ can cause the aggregation of AuNPs because of electrostatic interactions and the color of the solution changed from red to gray. However, in the presence of GPS, the above-mentioned process can be strongly hindered due to the chelation between GPS and Pb2+. Based on this anti-aggregation mechanism, the colorimetric detection method exhibits excellent sensitivity for GPS. The limit of detection (LOD) is 0.5 μM by the naked eye and 2.38 nM by UV-vis spectroscopy. The selectivity of the AuNP detection system for GPS is excellent compared with other pesticides. A good linear relationship (R2 = 0.99695) between the absorption intensity ratio and GPS concentrations indicates that our probe can be used for the quantitative assay of GPS. The detection method has been successfully used for detecting GPS in real environmental samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2019
·
IF 4.191
Ying Fu,Shuai-Qi Zhang,Yong-Xuan Liu,Jing-Yi Wang,Shuang Gao,Li-Xia Zhao,Fei Ye
4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is a very important target for the discovery of novel bleaching herbicides. In order to discover novel triketone green HPPD inhibitors with excellent herbicidal activity and crop selectivity, the natural product leptospermone was selected as the template compound, and niacin was employed as bioisostere to design and synthesize a series of novel substituted niacin-triketone derivatives. Some of the target compounds showed potent Arabidopsis thaliana HPPD ( At HPPD) inhibitory activity in vitro . Especially compound II-1 displayed the best herbicidal activity (IC 50 = 0.262 μM, At HPPD), and was safe for Zea mays at concentration of 300 g ai/ha. Molecular docking results indicated that the triketone moiety of compound II-1 could form a bidentate complex with Fe(II), and the pyridine subunit interacted with Phe430 and Phe360 via π−π packing. The present work indicated that 3-hydroxy-2-nicotinoylcyclohex-2-en-1-one could be a potential lead structure for developing novel green HPPD inhibitors.
研究领域:
植物学
·
药物化学
·
农业科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Lei Li,Haicheng Guo,Chen Shao,Shuili Yu,Daqiang Yin,Naiyun Gao,Ning Lu
The presence of algal organic matter (AOM) and emerging organic contaminants in surface drinking water sources has received increasing attention recently. Nevertheless, interactions between these two harmful co-existing compounds in water sources have rarely been reported. This study investigated the influence of AOM, including intracellular organic matter (IOM) and extracellular organic matter (EOM), on the photo-degradation of Diuron, under UV and visible light (VL) irradiation. Kinetics analyses indicated that both the direct and indirect photolysis of Diuron followed a pseudo-first-order reaction ( R 2 > 0.98). Diuron was rapidly removed under UV irradiation accompanied by minor impacts from AOM. Under VL irradiation, the photo-excited phycocyanin in the IOM was capable of accelerating Diuron degradation, whereas the coexistence of other organic compounds in the IOM inhibited the reaction due to a screening effect, resulting in a slower overall rate of Diuron degradation. By comparison, EOM promoted the reactions when pH exceeded 5.0. The AOM-mediated generation of triplet DOM ( 3 DOM ∗ ) accounted for 82% and 64% of the Diuron removal in the presence of IOM and EOM, respectively. Spectral excitation–emission matrices produced by AOM in solutions demonstrated the primary mechanisms of the co-existing AOM on Diuron degradation.
研究领域:
环境科学
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水处理工程
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2015
·
IF 2.746
Qiaoxuan Zhang,Verónica Gil,Elena Sánchez-López,María Ángeles García,Zhengjin Jiang,María Luisa Marina
The use of agrochemicals as pure enantiomers avoids the presence of non-active pesticide compounds in the environment. The quality control of these agrochemicals requires the development of new chiral methodologies. In this work, the performance of the monolithic column named poly(O-9-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11-dihydroquinidine-co-2-hydroxyethyl methacrylate-co-ethylene dimethacrylate) (poly(MQD- co -HEMA- co -EDMA)) was assessed as stationary phase for the enantiomeric separation of seven phenoxy acid herbicides (dichlorprop, 2-(4-chlorophenoxy)propionic acid, 2-(3-chlorophenoxy)propionic acid, mecoprop , fenoprop, 2-phenoxypropionic acid, and fenoxaprop) in a nano-liquid chromatography (nano-LC) system. Under optimized conditions (60/40 ( v/v ) ACN/0.1 M ammonium acetate (pH 6.0) at a flow rate of 20 μL/min), it was possible to obtain baseline separation for most of the studied compounds. The analysis of an enantiomerically pure mecoprop commercial herbicide sample which also contained three achiral phenoxy acid herbicides (MCPA, 2,4-D and dicamba) commonly present in these kinds of formulations showed that the use of a 80/20 ( v/v ) ACN/0.1 M ammonium acetate (pH 5.3) enabled the simultaneous separation of these compounds and mecoprop enantiomers in less than 8 min. The analytical characteristics of the methodology were evaluated in terms of selectivity, linearity, precision, accuracy, LOD, and LOQ. Results demonstrated that determined amounts of R-mecoprop in commercial formulations were in agreement with the labeled content and the enantiomeric impurity was below the LOQ. The poly(MQD- co -HEMA- co -EDMA) capillary monolithic column exhibits great potential as a useful and environmental-friendly tool for the quality control of agrochemicals by nano-LC.
研究领域:
分析化学
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环境科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10654-10661
·
IF 3.288
Qi Wu,Wei Wu,Xue Zhan,Xiudan Hou
A simple, facile method was adopted to synthesize three-dimensional chitosan grafted graphene oxide aerogel modified silica (3D CS/GOA@Sil) as an eco-friendly, sustainable extraction material for the preconcentration of phenoxy acid herbicides. An amidation reaction realized the immobilization of CS and GO on the surface of silica, which was followed by a freeze-drying technique to yield the CS/GOA@Sil with 3D architecture structure. The successful synthesis and properties of 3D CS/GOA@Sil were characterized and confirmed by using scanning electron microscopy, infrared spectroscopy, BET adsorption–desorption analysis, and thermogravimetric analysis. The surface area of 3D CS/GOA@Sil was twice that of the individual GO@Sil. Besides, the adsorption and extraction times were also shorter due to the ordered porous structure and rapid mass transfer. Under the optimal conditions, coupled with a high-performance liquid chromatography-ultraviolet detector, this as-established method presented wide linearities with desirable correlation coefficients (≥0.9936) and low limits of detection (≤1.5 μg L−1). Finally, it was applied in the analysis of phenoxy acid herbicides in vegetables, and satisfactory relative recoveries of 62.38–102.92% of spiked standard solutions with different concentrations were obtained.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xuerui Yang,Xue Cao,Li Zhang,Yanlin Wu,Lei Zhou,Guangli Xiu,Corinne Ferronato,Jean-Marc Chovelon
The widespread utilization of pesticides has attracted increasing attention to their environmental impacts and effective removal strategies. In the present study, the degradation of herbicides picloram (PCLO) and aminopyralid (AMP) with similar structures were investigated systematically by thermo activated persulfate. Overweight SO 4 •− was determined to be the predominant oxidizing species by quenching experiment. Obtained by laser-flash photolysis (LFP), reaction rate constants of SO 4 •− towards AMP and PCLO were determined at 1.56 × 10 9 M −1 s −1 and 1.21 × 10 9 M −1 s −1 , respectively. Product analysis revealed that both substances underwent similar oxidation paths, namely, successive oxidation on pyridine ring and formation of coupling-products as well as further hydroxylation and decarboxylation . Amino group on the pyridine ring was identified as the main reactive site, which was further confirmed by DFT calculation. It was susceptible attacked by SO 4 •− to form deamination, nitration , and self-coupling products. These couples could be further oxidatively dehydrated to form azo and a series of azo derivatives . EOCSAR program predicted significant hazards on aquatic species during the formation of these couplings and azo derivatives. Our work emphasized the potential ability and toxicity of contaminates to produce azo substances in the presence of amino groups on the pyridine ring.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2023
·Vol. 23
·期 8
·3006-3017
·
IF 3.6
Dong Yibo,Liu Xudong,Wu Xiaomao
Purpose In this study, the adsorption behavior of diuron in a typical black soil and its bioavailability to crops and earthworms were investigated by adsorption and incubation experiments, combined with biochar amendment and aging time. Methods In this study, the adsorption of diuron, and its uptake by corn and earthworms were investigated in black soil with 0.1–5% (w/w) bamboo charcoal. Results Uptake of diuron by corns was reduced by 45% in black soil aged for 0 day in 0.1–5% biochar-amended soil, the concentration of diuron in both roots and stems of corn plants tended to decrease with the increase of aging time, and the enrichment coefficient of diuron in corn also tended to decrease in 0.1–5% biochar-amended soil. When aging time was 0 day and the biochar amendment in black soil was 0.1–5%, the accumulation concentration of diuron in earthworms decreased by 63%; the bioconcentration coefficient of diuron in earthworms in black soil with different levels of biochar decreased continuously with the increase of aging time. Conclusion Biochar is an efficient adsorbent for diuron and could significantly reduce the uptake of diuron by plants and earthworms from contaminated soil. Significant correlations indicated that regression analyses could be constructed between the bioconcentration factor and sorption coefficients to predict the bioavailability of diuron residues in soil to corns and earthworms. Biochar amendment could be used as an option to immobilize diuron in soil and protect non-target organisms from diuron contamination.
研究领域:
环境科学
·
土壤学
·
生态毒理学
✓ 已验证
产品关联
DOI
高影响因子
MENDELEEV COMMUNICATIONS
·
2017
·
IF 1.741
Ivan P. Pozdnyakov,Victoria A. Salomatova,Marina V. Parkhats,Boris M. Dzhagarov,Nikolai M. Bazhin
pH-dependent efficiency of singlet oxygen ( 1 O 2 ) generation by fulvic acids (FAs) from different sources was estimated by time-resolved luminescence technique. All FAs turn up the highest quantum yields of 1 O 2 for neutral and alkali solutions [ ϕ 532 ( 1 O 2 )] = (0.3•2.5)í10 •2 ] and 3•5-fold decrease in ϕ 532 ( 1 O 2 ) for acidic solutions. Potential of FA ChangSheng (the best 1 O 2 generating agent among investigated FAs) in relation to photodegradation of non-UVA-absorbing herbicide Amitrole (3-amino-1,2,4-triazole) was demonstrated.
研究领域:
环境科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Qing Wang,Tingting Wang,Yanqing Zhang,Jiaxing Ma,Yiqian Tuo
The low allowable limit of triazine herbicides (THs) in rice makes it imperative to develop novel sample pretreatment methods for extraction and preconcentration of THs. Herein, a phosphoric acid activated biochar (PBC) was prepared and modified by chitosan (CS). For THs with different polarities, CS-PBC with multiple interaction sites exhibited satisfactory chemisorption. On this basis, a CS-PBC-based pipette tip-solid phase extraction (PT-SPE) was developed combined with HPLC to extract THs from rice. Low limits of detection (1.41–3.35 ng g −1 ), satisfactory linearity (0.01–2.00 μg g −1 , R 2 > 0.9974) and recoveries (96.13–116.25 %) were obtained with acceptable inter-day and intra-day precision (RSD ≤ 13.60 %). CS-PBC showed superior performance to three commercial single-mode adsorbents and comparable results to a hydrophilic-lipophilic balance adsorbent. The study explored the feasibility of PT-SPE for extracting THs from rice and broadened the application of plant biochar as an environmentally-friendly matrix in food sample pretreatment.
研究领域:
食品科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 20
·8088-8099
·
IF 11.034
Yuntian Xiao,Chuanhua Wu,Ling Zhou,Qiuxiang Yin,Jingxiang Yang
Due to the poor efficacy and environmental contamination caused by the ease of leaching, highly water-soluble herbicides have received considerable attention. For example, metamitron (MET), a herbicide that is used for controlling grass and broadleaf weeds in sugar beet fields, has led to a great threat to aquatic invertebrates because of its great migratory capacity. As a result, it is critical to control the release rate of MET applied in the field. Cocrystallization has been proven to be an effective strategy for dissolution property manipulation of pharmaceuticals and agrochemicals. However, few cocrystals of herbicides were reported for the release rate control. Herein, cocrystals of MET with cinnamic acid (CA), naringenin (NA), and baicalein (BA) were developed. Compared to pure MET, the dissolution rate of cocrystals MET–NA and MET–BA were dramatically decreased by 98.30% and 96.28%, respectively; the solubility of MET–NA and MET–BA were decreased by 95.49% and 96.21%. Leaching experiments showed that the leaching amounts of MET–NA and MET–BA in the soil were significantly reduced to roughly one-fifth of pure MET. Under simulated rainfall, the MET–NA and MET–BA showed a longer duration of action than pure MET. Additionally, crystal structure analysis and molecular dynamics simulations were conducted to reveal the mechanism of the sustained release effect of cocrystals MET–NA and MET–BA at a molecular level. This work demonstrates that cocrystal engineering can offer a promising strategy to achieve sustained-release efficacy and reduce environmental damage for highly water-soluble herbicides.
研究领域:
农业科学
·
化学
·
环境科学
✓ 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）