Journal of Water Process Engineering
·
2025
·
IF 6.7
Weibao Liu,Shengwen Zhou,Wen Xu,Jiangwei Shang,Ming Yi,Xiuwen Cheng
The advancement of environmentally friendly, cost-effective and efficient persulfate catalysts represents a pivotal step in the evolution of advanced oxidation technology involving persulfate. In this study, manganese sand composites modified with Co 3 O 4 quantum dots were prepared by isovolumetric impregnation and employed to activate persulfate (PMS) for levofloxacin (LVF) degradation. The resulting materials were characterized, and the results demonstrated that the Co 3 O 4 quantum dots enhanced the electron transfer ability of the materials, which in turn improved the catalytic ability. The degradation rate of levofloxacin was 99 % within 60 min, and the total organic carbon mineralization rate was 46 % at dosages of 0.4 g/L and 0.3 g/L of catalyst and PMS, respectively. The results of probe experiments demonstrated that •OH, SO 4 •- , and non-radicals were responsible for 11.8 %, 6.6 % and 81.6 % of the observed degradation, respectively. Potential degradation pathways of levofloxacin were proposed based on HPLC-MS and Fukui index analysis, and the toxicity changes of the degradation products were investigated. Cycling experiments and ionic dissolution tests demonstrated the stability of the material, which exhibited 94 % degradation and a markedly reduced ionic dissolution at the fifth cycle. Subsequently, the Co 3 O 4 quantum dots‑manganese sand composite system was evaluated in extended continuous flow device experiments for the treatment of real medical wastewater. The mineralization rate of the medical wastewater was 77 % in 48 h of operation, demonstrating the feasibility of the reaction system for the treatment of real medical wastewater and providing technical references for the future treatment of difficult-to-degrade organic wastewater.
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JOURNAL OF FOOD ENGINEERING
·
2024
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IF 5.3
Zhenfeng Xie,Yi Wu
In this study, we constructed a thermal insulation interface layer for O/W emulsion using composite nanoparticles formed through the aggregation of CaCO 3 particles, which was mediated by sodium casein (SC) and chitosan oligosaccharide (CHO). As a representative of hydrophilic thermo-sensitive active ingredients, the (−)-epigallocatechin gallate (EGCG) was dispersed in a blended oil comprising peppermint essential oil (PEO) and sunflower seed oil (SO). The retention rate of EGCG in the emulsion, which had a thermal insulation protective layer, increased by 34.37% after heating, compared to the control emulsion. Furthermore, our research findings indicate that the thermal degradation process of EGCG in emulsified oil droplets involves initial isomerization into (−)-gallocatechin gallate (GCG), followed by subsequent degradation. Notably, the presence of the thermal insulation interface layer effectively suppresses the thermal degradation of GCG. This can be primarily attributed to the numerous mesopores in SC&CHO&CaCO 3 particles and low thermal diffusivity of the thermal insulation interface layer. This study provides a reliable solution for the stable encapsulation of thermo-sensitive active ingredients in emulsified oil droplets of O/W emulsion through the design of a thermal insulation interface layer, thus effectively improving their stability.
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FOOD HYDROCOLLOIDS
·
2024
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IF 11
Qianqian Zhu,Jianfei Pei,Weijun Chen,Haiming Chen,Wenxue Chen
The formation of small droplets in emulsion systems promotes lipid oxidation, affecting their shelf life. In this study, ferulic acid was covalently grafted onto coconut protein (CPI) through alkaline treatment method. The structural characteristics, interfacial properties, emulsifying properties, and oxidative stability of emulsions prepared by coconut protein-ferulic acid covalent complexes (CPF) were investigated. The results showed that covalent grafting of ferulic acid could change the physicochemical properties of coconut protein, including altering protein secondary and tertiary structures, enhancing the absolute value of zeta potential and antioxidant activity [2, 2-diphenyl-1-picrylhydrazyl (DPPH • ) and 2, 2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS •+ )]. Meanwhile, the interfacial behavior of CPI and CPF was characterized by dissipative quartz crystal microbalance and dilatational rheology analysis. Compared to CPI, CPF could diffuse to the oil-water interface quickly (from 0.084 ± 0.002 to 0.154 ± 0.003 mN/m/s 1/2 ), and formed a thick interfacial layer dominated by elasticity, which enhanced the centrifugal stability of CPF-stabilized emulsions and effectively inhibited lipid oxidation within a 15-day storage period. Our results clearly demonstrated that coconut protein-ferulic acid conjugated complexes could improve emulsion stability and mitigate lipid oxidation, owing to the strong electrostatic repulsion interaction and high diffusion rate at interface. These findings may provide comprehensive insights for the further design and development of protein-polyphenol covalent complexes in the food industry.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Ying Tian,Changqing He,Lin He,Hong Sui,Xingang Li
The low recovery rate of petroleum and the inevitable formation of large quantities of oil–water emulsions limit the efficiency of petroleum production, transportation, and storage. To address these issues, four nonionic interfacial regulators (PA-1, PA-2, PAMA-1, and PAMA-2) were developed by incorporating oxygen atoms into a polyether substrate via esterification and polymerization reactions. Additionally, PAMA-1 and PAMA-2 were further modified with sulfonyl groups. Experimental results demonstrated that all regulators exhibited high-efficiency cleaning and demulsification performance at 25 °C. These regulators achieved 100 % oil removal from mineral and metal surfaces without causing damage. Furthermore, they could effectively break different kinds of water-in-oil (W/O) emulsions. It is also found that over 95.33 % dewatering rate could be achieved at 20 °C in 15 mins when PAMA-1 (600 mg/L) is added into asphaltene-stabilized emulsion and complete dehydration (100 %) within 40 mins. These interfacial regulators possess high interfacial activity and are rich in polar groups (–COOR, –OH, O = S = O, –C–O–C–). Mechanistic studies revealed that the heteroatomic groups introduced into the regulators serve as active sites for noncovalent interactions reconstruction, forming hydrogen bonds with natural interfacially active substances (e.g., asphaltenes) and water molecules. This promotes oil dispersion on solid surfaces and disrupts the oil–water interfacial film, improving cleaning and demulsification efficiency. Importantly, pre-treatment with these interfacial regulators effectively prevents emulsion formation. These regulators hold significant potential for applications in oil–water and oil–solid separation processes during petroleum exploitation.
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JOURNAL OF FOOD BIOCHEMISTRY
·
2025
·Vol. 2025
·期 1
·7434957
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IF 4.2
Xiumin Zhang,Wenfeng Du,Danni Zhang,Na Zhang,Yuan Liu,Shui Jiang
Background: Rapeseed oil is the most widely consumed vegetable oil globally. However, the key aroma-active compounds of rapeseed oil and their changes during storage are unclear. In this study, the flavor of rapeseed oil during storage was characterized by physicochemical analysis, sensory evaluation, electronic nose (E-nose), and gas chromatography–olfactometry (GC–O). Results: Peroxide value, acid value, and anisidine value gradually increased, while polyphenol content, tocopherol content, and sterol content showed a downward trend during storage. The E-nose combined with the linear discriminate analysis (LDA) method could discriminate rapeseed oil with different storage times. The sensory attributes changed significantly from distinctive pickled aroma to rancid, green, and fried aromas during storage. This work provides the aroma-active markers based on GC–O–MS for the quality evaluation of rapeseed oil during storage. A total of 136 volatile compounds were detected by GC–MS, and 16 odorants were identified by GC–O combined with aroma extract dilution analysis (AEDA). Finally, seven aroma-active volatile compounds (3-butenyl isothiocyanate, 2(5H)-furanone, 2-methoxy-4-vinylphenol, ( E )-2-octenal, ( E,E )-2,4-heptadienal, ( E,E )-2,4-decadienal, and 3-methyl-pentanoic acid) with the odor activity values (OAVs) greater than 1 were identified as potential key aroma volatiles that contributed significantly to the overall aroma of rapeseed oil. Conclusion: This study provided a comprehensive method to monitor the flavor quality change of rapeseed oil during storage. The identified volatile compounds could be the markers to characterize the quality changes of rapeseed oil during storage.
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Horticulture Research
·
2024
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IF 7.6
Yuan Ziyu,Li Gu,Zhang Huixian,Peng Zhaoxin,Ding Wenyu,Wen Huan,Zhou Hanxin,Zeng Jiwu,Chen Jiajing,Xu Juan
Citrus fruits have abundant flavonoid glycosides (FGs), an important class of natural functional and flavor components. However, there have been few reports about the modification of UDP-glycosyltransferases (UGTs) on flavonoids in citrus. Notably, in flavonoid biosynthesis, 7-O-glucosylation is the initial and essential step of glycosylation prior to the synthesis of flavanone disaccharides, the most abundant and iconic FGs in citrus fruits. Here, based on the accumulation of FGs observed at the very early fruit development stage of two pummelo varieties, we screened six novel flavonoid 7-O-glucosyltransferase genes (7GlcTs) via transcriptomic analysis and then characterized them in vitro. The results revealed that four Cg7GlcTs possess wide catalytic activities towards various flavonoid substrates, with CgUGT89AK1 exhibiting the highest catalytic efficiency. Transient overexpression of CgUGT90A31 and CgUGT89AK1 led to increases in FG synthesis in pummelo leaves. Interestingly, these two genes had conserved sequences and consistent functions across different germplasms. Moreover, CitUGT89AK1 was found to play a role in the response of citrus to Huanglongbing infection by promoting FG production. The findings improve our understanding of flavonoid 7-O-glucosylation by identifying the key genes, and may help improve the benefits of flavonoid biosynthesis for plants and humans in the future.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhiwei Zhao,Yuan Li,Yanjie Wang,Yating Wang,Yuhao Tang,Mengyue Lu,Xu Yang,Xiaoqing Wang,Feifei Zhang,Jinping Li,Jiangfeng Yang
The enrichment of low-concentration coal-bed methane is beneficial to solving the world’s energy concerns. However, most adsorbents used for CH 4 /N 2 separation from coal-bed methane are hydrophilic and ineffective under humid conditions. In this study, a hydrophobic nickel-based metal–organic framework (TUTQ-1Ni) was developed for efficient CH 4 /N 2 separation under humid conditions. Adsorption results show that, at 298 K and 1 bar, TUTQ-1Ni exhibits the highest CH 4 /N 2 selectivity (11.0) among the reported hydrophobic CH 4 -selective metal–organic frameworks. The results of theoretical calculations reveal that multiple O/S sites provide strong adsorption affinity for CH 4 over N 2 . Further, breakthrough experiments confirm the suitability of the material for CH 4 /N 2 separation, with the separation performance being maintained at even a high relative humidity of 100 %. The pressure swing adsorption simulation results indicate that TUTQ-1Ni is a potential candidate material for the selective capture of methane from coal-bed methane.
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PROGRESS IN ORGANIC COATINGS
·
2024
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IF 6.5
Quan Yuan,Liwei Yan,Jinfeng Tian,Yang Chen,Huawei Zou
With the development of the new generation space vehicles, traditional phenolic resin (PR)-based coatings are no longer able to meet the increasingly harsh thermal environment. There is an urgent need to develop higher performance PR to ensure the flight safety of aircraft. Therefore, in this work, a novel hyperbranched polysiloxane containing Si-O-Zr bond was synthesized and then introduced into PR to develop homogeneous silicone/phenolic hybrid resin coatings. The TG results indicate that the introduction of Si-O-Zr bonds significantly improves the heat resistance of silicone. During ablation, the hyperbranched polysiloxane will undergo a ceramization to produce SiO 2 and ZrO 2 particles, both of which will subsequently generate a highly viscous Zr-Si-O glassy phase as anti-ablation layer. With the fluidity and self-healing properties, it can fill the gaps of the carbon layer and cover the surface of the carbon layer, giving the hybrid resin excellent ablative resistance. The linear ablation rate of the hybrid resin can be as low as 0.003 mm/s, which is an 80 % decrease compared to pure PR. The synthesized hybrid resin is expected to act as superior thermal protection coatings for the next generation of spaceflight.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Hong Meng,Junhui Zhou,Chunyang Nie,Wenhao Li,Didi Li,Yongqing Zhang,Zhimin Ao
Understanding the metal bonding types in biochar and their effects on peroxymonosulfate (PMS) activation is essential for selecting appropriate biomass and developing efficient catalysts. This study reports a dual-pathway non-radical oxidation system activated by Mn-doped biochar (P-Mn-TPs-900). In the P-Mn-TPs-900/PMS system, phenol degradation reached 100 % within 60 min across a broad pH range (5 −10). Additionally, this oxidation system exhibited excellent stability (5 cycles), maintaining at least 74 % degradation efficiency in the presence of background ions or humic acid. Experimental results and density functional theory (DFT) calculations identified: i) C-O-Mn sites as the primary active sites for PMS activation, facilitating the formation of singlet oxygen ( 1 O 2 ) which was the key reactive oxygen species for phenol degradation; ii) phenol adsorbed on the P-Mn-TPs-900 surface was degraded via an electron transfer process between sulfate groups and phenol. DFT calculations showed strong hybridization between the Mn 3d-orbital, the O 2p-orbital, and the corresponding 2p-orbitals of carbon, which enhanced biochar's catalytic capability. This study provides insights into the role of the C-O-Mn site in PMS activation and offers guidance for selecting suitable biomass for developing practical Fenton-like systems in wastewater treatment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tong Zhao,Sining Liu,Yutong Shuai,Xinyi Zhang,Min Chen,Sijie Pei,Yuxi Duan,Shukai Wang,Yu Lu,Zhongfu Wang,Guiping Gong,Linjuan Huang
Pectin is a structurally complex heteropolysaccharide that affects intestinal microorganisms and mucin O -glycans. The present study employed an in vitro model to investigate dynamic changes in microbiota during pectin fermentation. Residual pectin fragments arising from its fermentation were applied to HT29-MTX cells to study the effect of pectin structure on mucin O -glycosylation. Prevotella , Bacteroides , and Parabacteroides were found to preferentially degrade galactose, arabinose, and on the rhamnogalacturonan RG-I side chain region and methyl esterification groups of pectin. Bifidobacterium , Enterococcus , Megamonas , and Dorea metabolized the galacturonic HG region on pectin to produce butyrate. All pectin fragments were found to up-regulate total O -glycans (1.55–2.73 fold) and neutral O -glycans (1.11–1.49 fold) on HT29-MTX mucins. The large HG fragment (81.04 kDa) increased significantly the amount of non-fucosylated glycans (by 2.46-fold); whereas the small HG fragment (16.02 kDa) promoted fucosylated (by 9.25 fold), and especially di-fucosylated O -glycans. Collectively, these results demonstrate that gut microorganisms degrade pectin fragments in the following order of utilization: RG-I, RG-II, and HG. The small fragment of HG improves the expression of fucosylated O -glycans in HT29-MTX cells, mainly owing to an increase in di-fucosylated O -glycans.
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TALANTA
·
2024
·
IF 5.6
Chen Cui,Yunfeng Fan,Yaxuan Chen,Renlong Wei,Jie Lv,Meng Yan,Dechen Jiang,Zhimin Liu
Cyanidin-3- O -glucoside (C3G), a natural antioxidant, plays multiple physiological or pathological roles in maintaining human health; thereby, designing advanced sensors to achieve specific recognition and high-sensitivity detection of C3G is significant. Herein, an imprinted-type electrochemiluminescence (ECL) sensing platform was developed using core-shell Ru@SiO 2 -CMIPs, which were prepared by covalent organic framework (COF)-based molecularly imprinted polymers (CMIPs) embedded in luminescent Ru@SiO 2 cores. The C3G-imprinted COF shell not only helps generate a steady-enhanced ECL signal, but also enables specific recognition of C3G. When C3G is bound to Ru@SiO 2 -CMIPs with abundant imprinted cavities, resonance energy transfer (RET) behavior is triggered, resulting in a quenched ECL response. The constructed Ru@SiO 2 -CMIPs nanoprobes exhibit ultra-high sensitivity, absolute specificity, and an ultra-low detection limit (0.15 pg mL −1 ) for analyzing C3G in food matrices. This study provides a means to construct an efficient and reliable molecular imprinting-based ECL sensor for food analysis.
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TALANTA
·
2024
·
IF 5.6
Jianwen Fei,Wei Yang,Yin Dai,Wei Xu,Huizhu Fan,Yani Zheng,Junli Hong,Jun Zhang,Wanying Zhu,Xuemin Zhou
The enzyme-like properties of nanozymes may be considerably affected by the structure and surface groups, which thus need to be optimized. Here, through a simple NaOH chemical corrosion method, the chemical structure similar to N-Methylpyrrolidone (NMP), which possessed intrinsic oxidase-like activity, was introduced into polypyrrole (PPy), and then this nanomaterial became oxygen-functionalized PPy ( o -PPy) with excellent oxidase-like activity from PPy without this property. Furthermore, after compounding magnetic Fe 3 O 4 , the obtained nanocomposites Fe 3 O 4 @o-PPy nanoparticles (Fe 3 O 4 @o-PPy NPs) showed superiorities in separation during synthesis and real-time control of enzyme catalysis . Studies have found that the enzymatic activity of Fe 3 O 4 @o-PPy NPs depended on the amount of functionalized oxygen and the conjugation extent of o -PPy. Fe 3 O 4 @o-PPy NPs had efficient oxidase-like activity under a wide range of pH and temperature. Based on the oxidase-like activity of Fe 3 O 4 @o-PPy NPs, a colorimetric sensor for glutathione (GSH), which presented rich color changes and satisfactory colorimetric resolution by adding the amaranth , was realized. We believe that the functional modification and structural regulation of PPy can not only realize its wider application but also promote the discovery of novel and efficient nanozymes .
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