Water
·
2024
·Vol. 16
·期 13
·1822
·
IF 3
Dongyuan Zhang,Lin Shi,Edwin Hena Dawolo,Bingfa Chen,Ning Ding,Hong Liu
In this study, magnetic (Fe)-loaded biochar was successfully prepared by a simple impregnation pyrolysis method. Meanwhile, its degradation capability and mechanism for typical antibiotic metronidazole (MNZ) were systematically investigated under different conditions. The characterization of the synthesized material showed that the specific surface area, pore diameter, and pore volume changed significantly. Also, functional groups and metal element Fe were introduced on the surface of the biochar, leading to its better capability to activate peroxymonosulfate (PMS). The degradation experiments showed that the removal of MNZ in the Fe-BC/PMS system can reach up to 95.3% in 60 min under optimal conditions. Free-radical capture experiments showed that there were several active species of •OH, SO4•−, •O2−, and1O2present in the catalyst to synergistically degrade MNZ, among which SO4•−played a major role; it was also found that the material can be easily recycled and was still effective after several uses. Further, the main degradation pathways of MNZ include nitrohydroxylation, hydroxyethyl functional group deletion, carboxylation of the amino functional group of •OH, demethylation, oxidation, and carboxylation. It is obvious that the synthesized magnetic-loaded biochar, Fe-BC, generated from waste rape straw crops, shows high catalytic performance in pollutant degradation, providing an insight into the recycling potential of waste biomass in the catalytic field for pollutant removal.
研究领域:
环境科学
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催化材料
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废弃物资源化
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Xia Jiang,Yang Liu,Haijiao Hao,Yan Xu,Jiale Huang,Daohua Sun,Qingbiao Li
Herein, we described a mild and facile method for the synthesis of three-dimensional (3D) hierarchically porous TiO2. This method simultaneously realized the C,N self-dopant, introduced more surface defectives, and decreased in the band-gap energy (Eg) of TiO2. Rape pollen was chosen as the biotemplate to prepare TiO2, and the pore property of the obtained products could be adjusted by changing the amount of Ti precursor and calcination temperature. The as-synthesized pollen-TiO2 not only duplicated the morphology of rape pollen, but also showed enhanced 1-butene selectivity in the reaction of selective hydrogenation of 1,3-butadiene after loading elemental Pd, when comparing with the commercial TiO2. Butenes selectivity of 98% and 1-butene selectivity of 66% were achieved at 50 °C, because of the hierarchically porous structure of pollen-TiO2 and the lower Eg and more surface defects resulting from the C,N dopant.
研究领域:
材料科学
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催化
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纳米技术
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yi Qin,Bo Chai,Chunlei Wang,Juntao Yan,Guozhi Fan,Guangsen Song
A porous biochar (BC) was prepared using the recycled agricultural waste rape straw as resources by combining high temperature carbonization with KOH activation procedure, and applied into tetracycline hydrochloride (TC) adsorption. The multiple characteristic techniques were adopted to investigate the structures and properties of as-prepared BC. The results demonstrated that the BC activated by KOH would possess the more graphite-like structures, more abundant oxygen-containing functional groups, and larger specific surface area (1531 m 2 /g) comparing with unactivated BC, which were favorable for the TC adsorption. The effects of initial TC concentration, solution pH value, salt ionic strength and adsorption temperature on the adsorption performances were explored in detail. The adsorption data could be well fitted by the pseudo-second-order kinetic model and Freundlich isothermal model. The maximum adsorption capacity of KOH activation BC could reach 325.07 mg/g at 30 °C. The endothermic and spontaneous properties of the adsorption system was implied by thermodynamic study. The adsorption TC mechanism of KOH activation BC was involved in the pore filling, π-π electron donor-acceptor interaction, hydrogen bonding and electrostatic action. Regeneration experiments showed that the TC removal efficiency could still attain 97.0% even after six cycling experiment, suggesting that the BC had the excellent reusability and stability. These results indicate the feasibility of a win-win strategy for the application of agricultural waste to water remediation.
研究领域:
环境科学
·
农业资源利用
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Guangyu Wu,Qi Liu,Jingyi Wang,Siye Xia,Hualong Wu,Jiaxiang Zong,Jiangang Han,Weinan Xing
Wastewater containing pharmaceuticals can be bioaccumulated, posing a potential risk to drinking water, human health, and ecosystems. In order to make the adsorption process more suitable for actual application, rape straw biomass fiber (treated by an acidified sodium chlorite solution, 5%) and Fe 3 O 4 embedded β-CD to prepare a novel adsorbent (RSBCDF), which was used for the removal of ibuprofen (IBP) from aqueous solution. The RSBCDF was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) measurements, scanning electron microscopy (SEM), and zeta potential measurements. The synthesized adsorbent was studied with regard to IBP removal percent under different adsorption conditions such as varying initial pH levels (4–10), initial ibuprofen concentrations (20−160 mg/L), contact time (5−150 min), and the dosage of adsorbent (10−100 mg) via batch adsorption experiments. The adsorption kinetics, thermodynamics, and isotherms were also investigated. The IBP adsorption behaviour followed a pseudo-second-order kinetic model and the Freundlich isotherm model. The maximum adsorption capacity obtained for ibuprofen was 48.29 mg/g. The values of Gibbs free energy change were negative (-2.58∼-3.56KJ/mol), suggesting that the process of ibuprofen adsorption onto adsorbent was spontaneous. The positive value of standard enthalpy change (12.09 kJ/mol) indicated that the adsorption process was endothermic. The obtained results prove that RSBCDF is a proficient and economically suitable material for removing IBP from water environments.
研究领域:
环境科学
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材料科学
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药学
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wei Tang,Bo Fan,Xinyue Wang,Caoxing Huang,Zhengyu Tang,Yucai He
Deep eutectic solvent (DES) pretreatment plays an indispensable role in destroying the natural anti-degradation barrier structure of lignocellulose . Here, the cetyltrimethylammonium bromide and glycerol were used to synthesize novel DES and introduced to the pretreatment process to facilitate the enzymatic hydrolysis efficiency of rape straw (RS). The results showed that the delignification and xylan removal could extremely reach 46.1% and 52.7% under optimal conditions (molar ratio of 1:6, 200 °C, 90 min), respectively. It also resulted in 171.4 mg/g higher accessibility, 7.2% higher crystallinity, and 122.3 m 2 /g lower lignin surface area in RS concerning morphological changes of deconstructed and porous cell wall structure. Ultimately, the reducing sugar yield of RS was increased from 27.4% to 67.9% after pretreatment with this type of DES. This study exploited a novel DES for facilely reducing the recalcitrance of lignocellulose and a promising process for efficient saccharification using renewable biomass.
研究领域:
生物化学
·
可再生资源工程
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Miaoling Luo,Shanshan Shao,Yu Cao,Xiaohua Li,Shiliang Wu
TG analysis, kinetic model and fixed-bed experiments were applied in this study to explore the synergistic effect of rape straw (RS) and acrylonitrile-butadiene-styrene copolymer (ABS) in the co-catalytic pyrolysis. The results showed that the preferential pyrolysis of RS was favorable for the formation of some active radicals and decreased the pyrolysis temperature of ABS from about 400 °C to 350 °C. As the mixing ratio of ABS rose, the temperature range of co-pyrolysis decreased gradually. The interaction between the free radicals generated by RS and ABS was effectively promoted with the addition of HZSM-5, and also the aromatization was accelerated. The temperature range of co-pyrolysis was decreased from 350 °C to 400 °C–340 °C–380 °C. The Flynn-Wall Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) were used to build the kinetics model, and revealed that the activation energy of co-pyrolysis system reached the bottom with the mixing ratio was 1:1, indicating the strongest synergistic effect at this point. The synergistic action was revealed from the kinetic analysis. In the fixed-bed test, the yield of liquid phase (54.15 %) and monocyclic aromatic hydrocarbons (MAHs) (32.87 %) peaked at the mixing ratio of 1:1, at which the synergistic effect inhibited the conversion to polycyclic aromatic hydrocarbons (PAHs).
研究领域:
生物质能
·
高分子材料
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热解技术
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化学动力学
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Shi-Ye Luo,Jia-Li Tao,Yan-Xiang Bi,Hong-Wei Xiao,Hua-Lei Chen,Xiang-Xin Li,Yin-Chen Wang,Xiao-Ming Fang
Crystallization degrades the physicochemical properties of honey and reduces consumer acceptance. To address this issue, radiofrequency was developed to investigate the decrystallization efficiency and quality impact mechanism of rape honey. The results showed that radiofrequency significantly decreased the number and size of crystals, leading to shortening the decrystallization time to less than 10 min. The response surface optimization methodology further indicated that the highest decrystallization rate (98.72 ± 0.34 %) and lower 5-Hydroxymethylfurfural (2.45 ± 0.12 mg/kg) contents were obtained. Furthermore, radiofrequency changed the honey from a pseudoplastic into a Newtonian fluid efficiently due to the volumetric heating feature. It is worth noting that the inactivation of glucose oxidase reduced the antibacterial capacity, while the increase in total phenolic and flavonoid contents improved the antioxidant capacity of rape honey. In summary, current findings indicated that radiofrequency is a potential alternative decrystallization technology for water baths.
研究领域:
食品科学
·
化学
·
农业
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产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Kai Zhu,Weiguo Wu,Liwen Jiang,Yu Zhang,Rongrong Wang,Junling Wu,Xiaobo Zhou,Luyan Liao
Fermented rape moss (FRM), one of pickled vegetable with salt cured in a short period fermentation (7 days), is broadly popular among consumers for crispness and mellowness. This study aimed to elucidate the variation of physicochemical indicators, flavor profiles, as well as bacterial communities during rape moss fermentation and the relationship between them. The results showed that flavor characteristics were dominantly accumulated in the late stage (day 6-day 7) of FRM. Moreover, the volatile compounds (VCs) of FRM were mainly ketones, esters and aldehydes, and 12 key VCs were detected, including 1 ester, 4 ketones, 2 terpenes, 1 aldehyde, 1 nitrile, 1 sulfur, 2 isothiocyanates. Additionally, Pseudomonas , Weissella , Leuconostoc , Latilactobacillus , Ligilactobacillus occupied relatively high abundance in the entire FRM fermentation. Furthermore, Spearman correlation analysis revealed that Latilactobacillus was positively correlated with 15 flavor profiles (5 FAAs, 2 OAs and 8 VCs). These findings may provide scientific references for the rational utilization of rape moss and the meticulous development of FRM.
研究领域:
食品科学
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微生物学
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代谢组学
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宏基因组学
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2021
·
IF 5.541
Xiaohua Li,Shengnan Ge,Shanshan Shao,Zhichao Lv,Xianliang Xiang,Yixi Cai
In order to promote the production of hydrocarbons in the catalytic pyrolysis of rape straw, a core-shell catalyst fabricated by external recrystallization method was employed. The composite catalyst HZSM-5@MCM-41 was prepared by varying the mass ratio of template and HZSM-5 (THR), and the effect of zeolite acidity and mesoporosity on the production of hydrocarbons was analyzed. A final pyrolysis temperature of 500 °C was suitable to obtain high yield of hydrocarbons over composite catalysts. Compared with ZSM-5 with a favorable pyrolysis temperature of 550 °C, a lower pyrolysis temperature meant a more efficient process, which may be related closely to the good diffusion of large-sized pyrolysis vapors over HZSM-5@MCM-41 catalysts. In addition, the highest yield of monocyclic aromatic hydrocarbons obtained over HZSM-5@MCM-41 with THR of 1 was 11.43 wt.%, which was boosted by 2.5 times compared with HZSM-5. A proper THR was suitable to fabricate a core-shell catalyst with excellent crystallinity, acidity and mesoporosity, and resulting in a high yield of hydrocarbons. Furthermore, the core-shell catalyst presents less formation of graphite-like coke, which indicated the easier removal of coke. Therefore, the composite HZSM-5@MCM-41 catalysts were more appropriate for upgrading of pyrolysis vapors for hydrocarbons.
研究领域:
能源与环境科学
·
催化化学
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DOI
高影响因子
Food & Function
·
2023
·Vol. 14
·期 4
·1897-1908
·
IF 6.1
Yuan Yuan,Shun Zhong,Zeyuan Deng,Guangyan Li,Hongyan Li
In this study, the effects of particle size on the microstructure, nutrient components and antioxidant activities of bee pollen were evaluated. Moreover, the in vitro simulated digestion model was used to explore whether there was a size effect on the release behavior of phenolic compounds from the bee pollen matrix. Results showed that the greater the damage degree of the bee pollen wall, the smaller the bee pollen particle became. The decrease in the bee pollen particle size promoted the release and extractability of sugar, protein, phenolics and flavonoids, and improved their antioxidant activities. In addition, during simulated digestion, the dissolution of total phenolics and flavonoids, as well as the antioxidant activities of bee pollen, increased with the decrease in the particle size. Results showed that minimizing the particle size of bee pollen was not always beneficial for bioaccessible phenolic compounds because their content and bioavailability decreased when the particle size became smaller than 200 μm.
研究领域:
食品科学
·
营养学
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生物化学
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DOI
PubMed
高影响因子
Foods
·
2025
·Vol. 15
·期 1
·70
·
IF 5.1
Chenyu Sun,Fei Pan,Wenli Tian,Zongyan Cui,Xiaofeng Xue,Yitian Xu
Honey variety authentication is critical for ensuring market integrity and protecting consumer rights, especially for high-value unifloral honeys, such as acacia honey, which are frequently adulterated with low-value alternatives such as rape honey due to their similar visual appearance. The aim of this study was to develop a method for precise discrimination between rape honey and acacia honey using their chemical profiles combined with machine learning. A total of 542 honey samples were collected from major beekeeping regions in China. Targeted quantification of 12 sugars and 20 amino acids was performed using UPLC-MS/MS. Multivariate analysis revealed significant differences in sugar and amino acid compositions between the two honey types, though partial samples overlapped due to chemical similarity. Six machine learning algorithms, including the Multilayer Perceptron, were employed for classification. Optimization was performed via 10-fold cross-validation and ADASYN oversampling, yielding optimal performance of 98% and 100% prediction accuracies for rape honey and acacia honey, respectively, on the independent test set. SHAP (Shapley Additive Explanations) analysis identified key differential markers, including fructose, turanose, glucose, and GABA, which contributed most to the classification. Furthermore, a user-friendly web application was developed to facilitate rapid on-site authentication. This study provides an innovative technical framework for honey variety discrimination, with potential applications in quality control and anti-fraud practices.
研究领域:
食品科学
·
分析化学
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机器学习应用
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养蜂业
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食品真伪鉴别
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产品关联
DOI
PubMed
高影响因子
eFood
·
2023
·Vol. 4
·期 4
·e101
·
IF 0
Yingjun Hu,Simin Chen,Wenrui Yan,Le Ji,Mengli Shao,Ze Sun,Dong He,Lijun Zhang,Zengrun Xia,Xinsheng Li,Hongxing Zheng,Shanshan Qi
Rape ( Brassica napus L .) bee pollen (RBP) is a functional food rich in nutrients obtained by worker bees collecting rape pollen and mixing it with nectar and bee salivary enzymes. The study aimed to investigate the protective impact of RBP on renal tissue damage and modulating gut microbiota in diabetic rats. We established a diabetic model of rat via streptozotocin injection, then the rats were treated with RBP for 6 weeks. Results showed that RBP significantly suppressed fasting glucose, reduced oxidative stress and prevented renal pathological changes as well as renal function damage in diabetic rats. In addition, RBP reduced the levels of serum inflammatory cytokines (tumor necrosis factor-α, monocyte chemoattractant protein-1, C-reaction protein, interleukin (IL)-6, IL-1β, and IL-18), and the expression levels of transforming growth factor-β1, p-Smad2, and p-Smad3 in the kidney. Moreover, RBP supplementation also improved the gut microbial dysregulation in diabetic rats. Based on the results, RBP can improve kidney tissue damage in diabetic rats. This study will promote the development of RBP functional food.
研究领域:
营养学
·
糖尿病
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肾脏生理学
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微生物学
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DOI
危险品化学品经营许可证（带存储）