SCIENCE OF THE TOTAL ENVIRONMENT
·
2025
·
IF 8
Wenjian Liu,Mengjiao Fan,Kai Sun,Xiao Cheng,Fei Wu,Shu Zhang,Xun Hu
FeCl 3 is a Lewis acid catalyzing condensation reaction, which might be beneficial for enhancing mass yield of activated carbon (AC) if used as a co-activator. Herein, this was verified by conducting activation of willow with various activators (ZnCl 2 , K 2 C 2 O 4 , H 3 PO 4 ) in the presence/absence of FeCl 3 . The results indicated that FeCl 3 competed with acid-catalyzed reactions induced by ZnCl 2 or H 3 PO 4 , interfering aromatization and diminishing AC yields (from 40.8 % to 37.0 % with ZnCl 2 ). In the activation with K 2 C 2 O 4 + FeCl 3 , In-situ IR measurement showed that FeCl 3 catalyzed polymerization reactions, but polymeric products were not stable and were further cracked with K 2 C 2 O 4 , reducing AC yield drastically from 27.6 % to 7.1 %. The co-presence of FeCl 3 in the activation reduced overall specific surface area (1201.6 versus 1127.2 m 2 g −1 for K 2 C 2 O 4 ) by merging of micropores to form a higher percentage of mesopores (i.e. 2.0 % to 17.1 % for K 2 C 2 O 4 , and 9.2 % to 41.4 % for H 3 PO 4 ). This pore restructuring significantly enhanced tetracycline adsorption (99.9 % removal for AC- K 2 C 2 O 4 + FeCl 3 versus 61.1 % for AC-K 2 C 2 O 4 alone), while compromising phenol adsorption (48.7 % versus 96.1 %) due to reduced micropore availability. The reduced specific surface area was also attributed to the retention of inorganics by solid phase reactions between FeCl 3 and K 2 C 2 O 4 or H 3 PO 4 . Additionally, the presence of FeCl 3 resulted in more fragmented surface of ACs generated from all activators.
研究领域:
化学工程
·
环境科学
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DOI
PubMed
高影响因子
PROCESS BIOCHEMISTRY
·
2023
·
IF 4.4
Si-Lu Wang,Jie Yu,Jian-Xi Song,Qing-Fan Meng,Zhuo-Rui Zhang,Gui-Quan Jiang
Amelanchier alnifolia polysaccharides (AAP) were isolated and purified and gave three sequential fractions, AAP1, AAP2 and AAP3. AAP3 was further separated and purified by cellulose chromatography to give three polysaccharide fractions, AAP3-I, AAP3-II and AAP3-III. A polysaccharide (AAP3-Ⅰ) with a molecular weight of 1.64 × 10 6 Da was mainly composed of rhamnose , glucose, galactose , xylose and arabinose . The Fourier transform infrared spectroscopy (FT-IR) analysis and DEAE-Cellulose-52 column elution results indicated that AAP3-Ⅰ is a neutral polysaccharide. The transmission electron microscopy (TEM) indicated that purified polysaccharide molecules are of higher purity and are in reticulated aggregates. AAP3-I exists in an entangled triple helix conformation. In vitro antioxidant assays showed that all three fractions had good, concentration-dependent, antioxidant properties. The antioxidant capacity was in the order AAP1 < AAP2 < AAP3. Therefore, AAP3 could serve as a potential natural antioxidant to prevent aging.
研究领域:
植物学
·
生物化学
·
食品科学
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Jie Yang,Jiangdong Dai,Lulu Wang,Wenna Ge,Atian Xie,Jinsong He,Yongsheng Yan
The problem of tetracycline (TC) antibiotic pollution in aquatic environment has attracted wide attention and research. It is still meaningful to develop high-efficiency separation materials and investigate their adsorption behavior and mechanism. In this research, porous carbons were prepared using the renewable willow branches as carbon source, via pre-carbonization and alkali activation. The activation temperature and alkali usage played important roles in the pore structure, which was mainly microporous. The WBAC-850-4 obtained at 850 °C and alkali/biochar ratio of 4:1 exhibited the largest specific surface area (3342 m 2 /g) and total pore volume (1.912 cm 3 /g), displaying the ultrahigh TC adsorption capacity of 1300 mg/g at 298 K. which was higher than that of the reported TC-adsorbents. WBAC-850-4 kept high adsorption ability with a minor impact in the broad pH range of 3.0–8.0. Thermodynamic analysis implied the physisorption dominated the spontaneous adsorption process. The structure-activity relationship between the TC adsorption capacity and porosity properties was established for the first time. Notably, the adsorption capacity of TC had a positive linear correlation with specific surface area, total pore volume, micropore surface area and micropore pore volume, and the correlation coefficient were higher than 0.97. It was first revealed that micropore filling was the main mechanism for porous carbons to bind TC, which meaningfully provided new insight for designing advanced TC-adsorbents in future.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 18
·1510
·
IF 4.4
Ning Luo,Hanwen Ge,Xiangyu Liu,Qingdong He,Wenbo Wang,Wenyuan Ma,Fang Guo
Developing environmentally friendly bulk materials capable of easily and thoroughly removing trace amounts of dye pollutants from water to rapidly obtain clean water has always been a goal pursued by researchers. Herein, a green material with a 3D architecture and with strong underwater rebounding and fatigue resistance ability was prepared by means of the assembly of biopolymer chitosan (CS) and natural caraganate fibers (CKFs) under freezing conditions. The CKFs can randomly and uniformly distribute in the lamellar structure formed during the freezing process of CS and CKFs, playing a role similar to that of “steel bars” in concrete, thus providing longitudinal support for the 3D-architecture material. The 2D layers formed by CS and CKFs as the main basic units can provide the material with a higher strength. The 3D-architecture material can bear the compressive force of a weight underwater for multiple cycles, meeting the requirements for water purification. The underwater compression test shows that the 3D-architecture material can quickly rebound to its original shape after removing the stress. This 3D-architecture material can be used to purify dye-containing water. When its dosage is 3 g/L, the material can remove 99.65% of the Congo Red (CR) in a 50 mg/L dye solution. The adsorption performance of the 3D architecture adsorbent for CR removal in actual water samples (i.e., tap water, seawater) is superior than that of commercial activated carbon. Due to its porous block characteristics, this material can be used for the continuous and efficient treatment of wastewater containing trace amounts of CR dye to obtain pure clean water, meaning that it has great potential for the effective purification of dye wastewater.
研究领域:
环境科学
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材料科学
·
生物化学
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DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2013
·
IF 2.591
Sui Xiao,Li-Fang Zhang,Xu Zhang,Su-Mei Li,Fei-Qun Xue
Several Acalypha australis Linn. species are used in traditional medicine in Southeast Asia. In this work, the ultra-performance liquid chromatography/mass spectrometry fingerprints and the antibacterial activities of A. australis Linn. were investigated. An in-depth discussion on the reliability of identifying and obtaining potentially active compounds by spectrum-effect relationship and semi-preparative high performance liquid chromatography was conducted. The result shows that gallic acid and a compound with molecular weight of 634.1 in the fingerprints were the main antibacterial compounds. Compared to the crude extract of A. australis Linn., both compounds increase the antibacterial efficacy 10 to 20 times. Compounds with molecular weights of 154.0, 292.0, and 485.1 in the fingerprints were the auxiliary antibacterial compounds. Through the entire isolation procedure, we obtained these antibacterial compounds with purities of 92.53, 87.98, 90.73, 89.36, and 88.14%, respectively. This work provides a general model of the combination of ultra-performance liquid chromatography/mass spectrometry fingerprinting and antibacterial test to study the spectrum-effect relationships of A. australis Linn. This model can be used to discover further the active compounds of this herb.
研究领域:
药用植物学
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天然产物化学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 32
·50800
·
IF 3.125
Peng Zhu,Xingqun Zhang,Yunlong Wang,Changen Li,Xianzhu Wang,Jiancheng Tie,Ying Wang
Capparis spinosa L. (CSL) is a medicinal plant with high antibacterial activity against a variety of pathogens and antioxidation properties. In this paper, for the first time, nanofiber membranes of polylactic acid (PLA) containing 0, 4, 7,and 10 wt% CSL ethyl acetate extract were fabricated by electrospinning. Scanning electron microscopy showed that the fiber diameter decreased after adding CSL to the PLA nanofibers. Fourier transform infrared spectroscopy confirmed that CSL was successfully incorporated in the matrix. The water contact angle test proved that the addition of CSL improved the hydrophilic properties of the material. Moreover, the addition of CSL improved the oxidation resistance of the composite fiber membrane. A burst drug release from the composite nanofibers occurred within the first 12 hr, followed by slow release over a prolonged period of time. As the concentration of CSL increased, the inhibition ability of nanofibers against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) gradually increased. In summary, due to their good mechanical, antioxidant, and antibacterial properties, CSL/PLA nanofiber membranes may possess potential applications as wound dressing materials.
研究领域:
材料科学
·
生物医学工程
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药学
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产品关联
DOI
高影响因子
Food & Function
·
2020
·Vol. 11
·期 5
·4356-4362
·
IF 4.171
Yunci Zhang,Dongyu Gu,Shuai He,Jing Meng,Jifeng Wang,Yunxiao Wang,Yi Wang,Jing Tian,Yi Yang
The flower of S. japonica is a favorite food and used as traditional medicine. In the present study, a facile and effective method based on the changes in the composition before and after the enzyme reaction was established to screen the active compounds from complex natural products. The separation of an active compound from the ethanolic extracts of Sophora japonica var. violacea, which exhibited the α-amylase inhibitory activity is presented as an example. The analysis of HPLC showed that one component was reduced by 25% after the enzyme reaction. The potential active compound was isolated via LH-20 gel permeation chromatography and identified as kaempferol 3-O-α-L-rhamnopyranosyl-(1 → 6)-β-D-galactopyranosyl-7-O-α-L-rhamnopyranoside by 1H and 13C NMR. The in vitro test indicated that the compound had the α-amylase inhibitory activity, and the IC50 was 88.56 ± 0.60 μg mL−1. The molecular docking study of this compound showed that the compound enfolded in the active sites of α-amylase completely and interacted with the amino acid residues through hydrogen bonds, van der Waals force and hydrophobic interactions.
研究领域:
药理学
·
植物化学
✓ 已验证
DOI
PubMed
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2025
·
IF 4
Zepeng Yang,Huangling Wang,Chen Huang,Cui Wang,Zimeng Geng,Fei Lyu
Asian longhorned beetle ( Anoplophora glabripennis ) has caused significant economic and ecological damage. However, environmentally friendly control strategies remain limited. Elucidating the adult's feeding preference is critical for developing effective and sustainable pest management approaches. Therefore, we firstly compared the feeding preference of adults on the Salix babylonica branch with diameters of 0.5-cm, 2-cm, 4-cm, 8-cm, 16-cm. The results showed that both female and male significantly preferred 2-cm branches over the others. Subsequently, we analyzed metabolites allocation patterns across these branch types, identifying a total of 2216 metabolites. Further analyses showed that 1500 differentially accumulated metabolites (DAMs) in branches with diameters of 0.5-cm, 4-cm, 8-cm, 16-cm compared to 2-cm samples. These DAMs were significantly enriched in flavonoid, flavone and flavonol biosynthesis pathways when comparing the 2-cm branches to others. The contents of 10 DAMs in flavonoid, flavone and flavonol biosynthesis pathways showed a significant negative correlation with feeding consumptions. To evaluate the antifeeding effects of flavonoid-related metabolites, four economically viable and practically flavonoid-related metabolites (+)-taxifolin, naringenin, kaempferol, and phlorizin were selected for feeding bioassays. They significantly inhibited feeding consumption, with (+)-taxifolin, naringenin, and phlorizin reducing by up to 70 %. Dose-response experiments confirmed varying concentrations of these compounds significantly suppressed feeding consumption. Our findings demonstrate that the allocation patterns of flavonoid compounds in branches of different diameters regulate the feeding preferences of A. glabripennis . This study explores a metabolomics-driven approach that centers on size-structured flavonoid reprogramming in S. babylonica branches, aiming to establish a sustainable strategy for disrupting A. glabripennis 's feeding preference.
研究领域:
昆虫学
·
植物生理学
·
化学生态学
·
次生代谢
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林业害虫管理
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分子生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2020
·
IF 3.465
Guanyi Chen,Chuanbin Wang,Jingnan Tian,Juping Liu,Qingjie Ma,Bin Liu,Xiangping Li
Removal of heavy metals from water by biochar is necessary and benefit for human life and environmental protection. In this study, biochar from sludge (SB), cow dung (DB), corn stalk (CB) and willow branches (WB) were synthesized and activated by potassium hydroxide (KOH), and these biochars were used as adsorbent to remove divalent cadmium ion (Cd(II)) from water. The materials were further characterized by using N 2 -sorption, scanning electron microscopy (SEM), elemental analysis, thermal gravity and differential thermal gravity (TG/DTG) and fourier transform infrared spectroscopy (FTIR). It found that external surface area of biochar had significant effect on the adsorption of Cd(II). Batch adsorption experiments were performed to investigate the effects of various parameters, including initial pH value, adsorbent dosage, concentration of Cd(II) and adsorption time. The results showed that CB had a better adsorption ability to remove Cd(II) from water than the other biochars. The pseudo-second-order and pseudo-first-order kinetics models were introduced to study the adsorption kinetics of Cd(II) by CB. The Freundlich model and Langmuir model were both fit for the experimental isotherm data. The maximum adsorption capacity of 40 mg/g was obtained by CB according to the experimental isotherm data by Langmuir model.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Waste and Biomass Valorization
·
2018
·Vol. 11
·期 5
·1983-1988
·
IF 1.874
Chang Fei,Zhou Quan
Brønsted acidic ionic liquid supported on magnetic Fe 3 O 4 [ β -CD-6-Im-(CH 2 ) 3 -HSO 3 ][HSO 4 ]-Fe 3 O 4 was synthesized successfully, the catalyst was characterized via TGA, FT-IR, XRD, SEM, BET and acidity determination, and used to catalyze the high-acidic untreated Jatropha carcass L. seed crude oil (46.0 mg KOH/g) for biodiesel production in a single pot. The results showed that 94.70% yield of FAME was obtained under the optimized reaction conditions of temperature of 130 °C, 10:1 molar ratio of methanol to oil, 3 wt% of catalyst dosage, 3 h reaction time. In addition, the catalyst activity was not significantly decreased after five recycles.
研究领域:
化学工程
·
可再生能源
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 11
·e202200414
·
IF 2.745
Xin-Yu Lei,Shao-Huan Liu,Ya-Xian Zhao,Meng-Jia Guo,Ling Tao,Xiang-Chun Shen,Nen-Ling Zhang
A pair of new lignan conformers ( 1 – 2 ), one new flavonoid glycoside ( 3 ), as well as nineteen known compounds were purified from the twigs and leaves of Cajanus cajan (L.) Millsp.. The planar structures of the unknown compounds were determined via NMR and high-resolution mass spectrometry, while their absolute configurations were elucidated via comparison between their experimental and calculated electronic circular dichroism (ECD) values. All the isolated compounds were assayed for their α -glucosidase inhibitory activities. The results demonstrated that compounds 8 – 12 , 15 – 16 , 18 – 19 , 21 – 22 had strong inhibition activities, with compound 10 (IC 50 =0.4±0.21 μM) most active. The structure-activity relationships were preliminarily summarized. Enzyme kinetics showed that compounds 8 , 9 , 15 – 16 , 18 – 19 , 21 – 22 were non-competitive inhibitors and compounds 10 – 12 were anti-competitive ones. Graphical
研究领域:
植物化学
·
药理学
·
天然产物研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLANT CELL AND ENVIRONMENT
·
2024
·
IF 6
Peipei Zhu,Yanping Zhang,Mengqi Deng,Yuxin Zhang,Jing Luo,Runhua Han,Letian Xu
Polystyrene micro- and nanoplastics (MNPs) are increasingly found in terrestrial environments, posing risks across the food web. However, the potential impacts of MNPs transfer on plant-insect interactions remains largely unknown. In this study, consumption of willow plants ( Salix maizhokunggarensis ) exposed to 10.0 mg/L MNPs for 21 days inhibited survival and reduced body weight in Plagiodera versicolora larvae unlike those exposed to lower concentrations or shorter durations (0.1, 1.0 and 10.0 mg/L MNPs for 7 or 14 days). MNPs exposure increased lignin content and leaf thickness in willows, leading to decreased leaf consumption and increased mouthpart wear in P. versicolora larvae. Transcriptome and gut microbiota analyses revealed significant downregulation of genes related to digestion, intestinal homoeostasis, immunity, and growth/development along with profound alterations in gut microbiota composition. Notably, the abundance of the pathogenic bacterium Pseudomonas increased significantly. The gut barrier was disrupted, allowing gut bacteria to translocate into the haemolymph, accelerating larval mortality. Overall, MNPs altered plant physiology, making willow plants unsuitable for herbivore consumption and indirectly influenced herbivore survival by modulating gut bacteria. These findings offer novel insights into the cascading ecological effects and risks of MNPs, highlighting potential impacts on plant-herbivore interactions, biodiversity, and ecosystem health in terrestrial ecosystems.
CAS / MDL:
研究领域:
环境科学
·
生态学
·
植物学
·
昆虫学
·
微生物学
✓ 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）