Processes
·
2023
·Vol. 11
·期 7
·2050
·
IF 3.5
Shi Yan,Li Nie,Juan Ren,Wei Wang,Jingtao Xu,Ning Wang,Qian Zhao
Phosphorus (P) management in the “water-energy-resource-nexus” in wastewater treatment plants (WWTPs) remains a longstanding challenge. P adsorption from the P-enriched digested sludge liquor (DSL) is a comparatively more practical and economically viable approach for P recovery in WWTPs. However, high concentrations of impurities in DSL might pose a negative and interferential effect on P adsorption, hindering the application of sorbents or precipitation methods. Given such a situation, highly efficient and cost-effective sorbent towards P reclamation from DSL is highly needed. Therefore, this study aims to develop a novel complex agent containing aluminum coagulant and superparamagnetic nano-sorbent (SNS) that can be used in magnetic seeding coagulation for P recovery. The complex agents with different PACl: SNS ratios showed varied turbidity removal rates and P recovery efficiencies and the optimal ratio was 15 mg PACl: 15 g SNS. PAC and SNS showed significant interaction because PAC could enhance P adsorption by shielding the interferential effect of colloidal impurities. In addition, the complex is highly regenerative, with turbidity and P removal rate stably maintained at 70–80% after 10 adsorption/regeneration cycles. The cost–benefit analysis of the dosing complex agent showed a dosing cost of 0.154 EUR/m3, admittedly much higher than the conventional magnetic seeding coagulation, which could probably be covered by the profit if the expensive and rare P product is reclaimed. This work indicated that the complex agent was superior due to its high adsorption capacity, easy separation, and repeated dosing, and therefore had the potential for P recovery from DSL.Keywords:phosphorus recovery;digested sludge liquor;magnetic seeding coagulation;superparamagnetic nano-sorbents;economic cost
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BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2023
·Vol. 46
·期 8
·1175-1194
·
IF 3.8
Liu Siyuan,Liu Wei,Yin Hao,Yang Chunyan,Chen Jianxin
This work focused on the development of an inexpensive carbon source and the improvement of the fermentation-foam fractionation coupling system. The rhamnolipids production capacity of waste frying oil (WFO) was evaluated. The suitable bacterial cultivation of seed liquid and the addition amount of WFO was 16 h and 2% (v/v), respectively. A combined strategy of cell immobilization and oil emulsion avoid cell entrainment inside foam and improves the oil mass transfer rate. The immobilization conditions of bacterial cells into alginate-chitosan-alginate (ACA) microcapsules were optimized using the response surface method (RSM). Under the optimal conditions, rhamnolipids production using batch fermentation with immobilized strain reached 7.18 ± 0.23% g/L. WFO was emulsified into a fermentation medium using rhamnolipids as emulsifier (0.5 g/L). By monitoring dissolved oxygen, 30 mL/min was selected as a suitable air volumetric flow rate for fermentation-foam fractionation coupling operation. The total production and recovery percentage of rhamnolipids were 11.29 ± 0.36 g/L and 95.62 ± 0.38%, respectively. Graphical abstract
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ACS ES&T Engineering
·
2023
·
IF 7.1
Wei-Ping Zhu,Jie Deng,Zhi-Jie Chen,Jia-Cheng Li,Juan Xu
The performance of three-dimensional biofilm electrode reactors (3D-BERs) in hydrogen autotrophic denitrification is determined by electroactive biofilms. Herein, a self-assembled hybrid biofilm (SAHB) is developed on granular activated carbon particle electrodes by incorporating nano α-Fe2O3. The influences of operating parameters such as current, influent concentration, and hydraulic retention time (HRT) on denitrification are investigated as well as the mechanisms of SAHB-improved denitrification. The results indicate that SAHB achieves a high autotrophic denitrification rate of 4.20 mg TN/L/h under 40 mA current, 100 mg/L nitrate, and 26 h HRT, outperforming the naturally formed biofilm by 23.53%. SAHB contains more microorganisms than naturally formed biofilms, revealing that nano α-Fe2O3 is conducive to trapping free microorganisms on particle electrodes. SAHB enriches denitrification-related genes and increases corresponding enzyme activities (particularly nitrite reductase). According to metagenomic sequencing, nano α-Fe2O3 addition at a current level of 40 mA appears to favor denitrification via the nirS-dependent pathway probably due to its high affinity for cytochrome C. Metagenomic binning reveals that the microorganism associated with Zoogloeaceae (Rhodocyclales order) in SAHB may play a pivotal role in hydrogen autotrophic denitrification. This work develops a novel denitrification system, furthering our understanding of hydrogen autotrophic denitrification in 3D-BERs.
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Scientific Reports
·
2023
·Vol. 13
·期 1
·1-13
·
IF 4.6
Ma Peipei,Li Jinlei,Huang Qing,Wei Shijie,Ge Hurong,Wang Zhizhong
To investigate the potential mechanism of resveratrol in anti-fatigue by network pharmacology and molecular docking, and to investigate the anti-fatigue efficacy of resveratrol through in vitro animal experiments. Resveratrol action targets and fatigue-related targets were obtained using various databases. The anti-fatigue targets of resveratrol were obtained using the Venn diagram, uploaded to the String database, imported into Cytoscape 3.7.1, and constructed into a Protein-protein interaction network. The target genes were then subjected to Gene ontology and Kyoto encyclopedia of gene and genome enrichment analysis. Molecular docking verification was performed on the binding ability of the core target to resveratrol. Using swimming-trained mice as exercise models, exhaustive swimming time and fatigue-related biochemical parameters were used as indicators to investigate the effects of resveratrol on exercise endurance and energy metabolism. 104 anti-fatigue targets and 10 core target genes of resveratrol were obtained. KEGG analysis enrichment included AGE-RAGE signaling pathway in diabetic complications, Human cytomegalovirus infection, and Pathways in cancer. Molecular docking showed that the core target genes TP53, PIK3R1, AKT1, PIK3CA, and MAPK1 had good binding activity to resveratrol. Animal experiments showed that resveratrol could prolong the exhaustive swimming time of endurance-trained mice (P < 0.01), decrease aspartate aminotransferase, alanine aminotransferase, uric acid, blood lactate (P < 0.01), decrease blood urea nitrogen (P < 0.05), increase the liver glycogen, muscle glycogen (P < 0.01). Conclusion: Resveratrol has the characteristics of multiple targets and multiple pathways in anti-fatigue; resveratrol can enhance exercise endurance in mice.
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JOURNAL OF MOLECULAR LIQUIDS
·
2018
·
IF 4.513
Zichen Yin,Yanling Wang,Kun Wang,Chuanbao Zhang
Hydroxypropyl guar gum (HPG) is an important guar gum derivative commonly used as thickener for fracturing fluids in the field of petroleum industry . This paper presents an investigation of the adsorption properties of HPG on quartz sand using a modified measurement method. The effects of pH, temperature, inorganic salt, alcohols and polymers on the adsorption density of HPG were also studied. The results showed that the effect of pH and temperature from 20 °C to 60 °C on the adsorption capacity could be negligible. Sodium chloride (NaCl) has little effect on HPG adsorption; however, potassium chloride (KCl), calcium chloride (CaCl 2 ) and magnesium chloride (MgCl 2 ) increased the adsorption capacity while sodium sulfate (Na 2 SO 4 ) and trisodium phosphate (Na 3 PO 4 ) resulted in the decrease of the adsorption density. In addition, monobasic alcohol has no significant effect on HPG adsorption while the addition of polybasic alcohol increased the adsorption. The addition of partially hydrolyzed polyacrylamide (HPAM) decreased the adsorption capacity. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) test demonstrated that HPG was only adsorbed on the surface of quartz sand and not absorbed into the quartz. The Fourier infrared spectroscopy showed that the HPG adsorption mechanism on quartz sand was caused by a hydrogen bond and Van der Waals' forces.
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FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Su Xu,Dajuan Shi,Haijiang Chen,Fengwei Ma,Guangcan Tao,Lingshuai Meng,Dong Lin,Siyao Wu,Qiang Fei
Strawberries represent a significant economic crop, with various cultivars exhibiting notable differences in taste, aroma, and nutritional value. Consequently, the discrimination and characterization of different strawberry varieties to assess their quality have become pressing issues that require attention. This study evaluated the flavor characteristics of three strawberry varieties (HY, ZJ, BXGZ) through sensory evaluation, physicochemical analysis, E-nose, HS-SPME-GC–MS, and HS-GC-IMS. The results indicated that ZJ strawberries exhibited the highest levels of sweetness, whereas HY strawberries were the hardest. BXGZ strawberries displayed the highest concentrations of vitamin C, total phenols, and flavonoids. Additionally, 18, 30, and 33 volatile organic compounds (VOCs) with odor activity values (OAV) greater than 1 were identified in HY, ZJ, and BXGZ strawberries, respectively. Based on the results from partial least squares discriminant analysis (PLS-DA), 3 physicochemical indicators, 18 VOCs detected using HS-SPME-GC–MS, and 26 VOCs detected using HS-GC-IMS were identified as potential biomarkers. These findings offer valuable insights into the flavor differences among strawberry varieties and establish a rapid analysis method for strawberry fruit aroma using GC-IMS.
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Journal of Zhejiang University-SCIENCE B
·
2016
·
IF 1.303
Tao Bao,Ye Wang,Yu-ting Li,Vemana Gowd,Xin-he Niu,Hai-ying Yang,Li-shui Chen,Wei Chen,Chong-de Sun
Oxidative stress and diabetes have a tendency to alter protein, lipid, and DNA moieties. One of the strategic methods used to reduce diabetes-associated oxidative stress is to inhibit the carbohydrate-digesting enzymes, thereby decreasing gastrointestinal glucose production. Plant-derived natural antioxidant molecules are considered a therapeutic tool in the treatment of oxidative stress and diabetes. The objective of this study was to identify tartary buckwheat rice flavonoids and evaluate the effect of in vitro digestion on their antioxidant and antidiabetic properties. High performance liquid chromatography (HPLC) analysis indicated the presence of rutin as a major component and quercitrin as a minor component of both digested and non-digested flavonoids. Both extracts showed a significant antioxidant capacity, but digested flavonoids showed reduced activity compared to non-digested. There were some decreases of the antioxidant activities (2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS), 2,2-diphenyl-1-picrylhydrazy (DPPH) radical, and ferric reducing antioxidant power (FRAP)) of digested tartary buckwheat rice flavonoids compared with non-digested. Flavonoids from both groups significantly inhibited reactive oxygen species (ROS) production and α-glucosidase activity. Both digested and non-digested flavonoids markedly increased glucose consumption and glycogen content in HepG2 cells. Tartary buckwheat rice flavonoids showed appreciable antioxidant and antidiabetic properties, even after digestion. Tartary buckwheat rice appears to be a promising functional food with potent antioxidant and antidiabetic properties.
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CARBOHYDRATE POLYMERS
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2016
·
IF 4.219
Ting Hu,Chenbo Jiang,Qilin Huang,Fengyuan Sun
An exopolysaccharide (EPS) was fractionated from fermentation media of a Cordyceps sinensis fungus (Cs-HK1) by ethanol precipitation at 2/5 volume ratio of ethanol/media. Its structural characteristics were elucidated by FT-IR, GC, GC–MS, 1D and 2D NMR combined with periodate oxidation, Smith degradation, partial acid hydrolysis, and methylation analysis. Furthermore, the immunomodulatory activity of EPS was evaluated by the model of cyclophosphamide-induced immunosuppression. The results from monosaccharide composition and partial acid hydrolysis indicated that EPS almost consisted of glucose excluding a trace amount of mannose . GC–MS and NMR analysis further confirmed EPS had a linear backbone of (1→3)-β- d -glucopyranosyl residues with a single (1→6)-β- d -glucopyranosyl side-branching unit for every three β- d -glucopyranosyl residues, showing a comb-like β- d -glucan with short and intensive branches, which was responsible for high viscosity. Moreover, EPS could significantly enhance immune organs and stimulate the release of major cytokines TNF-α and INF-γ, suggesting that EPS exhibited protective effect in immunocompromised mice.
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MOLECULES
·
2016
·Vol. 21
·期 1
·97
·
IF 2.465
Chang-Wei Zhang,Cheng-Zhang Wang,Ran Tao
In this study, high performance liquid chromatography (HPLC), ultraviolet (UV), thermagravimetric analyzer (TGA), pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS), and scanning electron microscope (SEM) were used as measurement techniques, contents of chemical composition, pyrolytic products, thermal stability, morphological characterization ofGinkgo bilobaleaves (GBL) acted as the index, and physicochemical properties of GBL after enzymolysis based ultrasound extraction (EBUE) and Soxhlet extraction were studied. The detection results of chemical composition revealed that contents of general flavone, soluble protein, soluble total sugar and protein in the GBL declined significantly after EBUE, and contents of polyprenols and crude fat obviously reduced as well after Soxhlet extraction. Py-GC-MS results indicated that total GC contents of micromolecules with carbon less than 12 from 54.0% before EBUE decline to 8.34% after EBUE. Total GC contents of long-chain fatty acids with carbon less than 20 from 43.0% before EBUE reduced to 27.0% after Soxhlet extraction. Thermal stability results showed that GBL after Soxhlet extraction was easier to decompose than GBL before EBUE. SEM results illustrated that surface structure of GBL was damaged severely after EBUE, compared with GBL before EBUE, while organic solvent extraction had little influence on the morphological characterization of GBL after Soxhlet extraction compared with GBL after EBUE.Keywords:physicochemical properties;Ginkgo bilobaleaves;enzymolysis;ultrasound;Soxhlet extraction
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Horticulturae
·
2024
·Vol. 10
·期 11
·1144
·
IF 3.1
Mostafa Saeed,Lan Zhao,Ahmed K. Rashwan,Ahmed I. Osman,Zhuyun Chen,Guoyun Wang,Chaochao Zhou,Ting Tu,Ahmed Alabd,Yun Jiao,Zhongshan Gao
Ethylene is an essential indicator of fruit ripening and climacteric or non-climacteric nature. This study investigated the postharvest behavior of five Chinese bayberry cultivars ‘Biqi’, ‘Dongkui’, ‘Fenhong’, ‘Xiazhihong’, and ‘Shuijing’. The fruits were harvested mature and stored at room temperature (25 °C) and under cold storage conditions (4 °C) to investigate the dynamics of ethylene production, firmness, anthocyanin content, and cell wall polysaccharide composition, as well as basic fruit physicochemical characteristics. The results show that Chinese bayberry is a climacteric fruit with ethylene production peaking shortly after harvest, especially at room temperature. Fruit color intensified over time due to anthocyanin accumulation, particularly in the flesh core. Darker cultivars produced more ethylene, which correlated with higher anthocyanin levels. At room temperature, ‘Biqi’ (black) had the highest ethylene production (4.03 µL·kg−1·h−1) and anthocyanin content (0.91 mg/g FW), while ‘Shuijing’, the white cultivar, had the lowest ethylene levels (1.9 µL·kg−1·h−1) and anthocyanin content (0.03 mg/g FW). Firmness significantly decreased at room temperature due to the degradation of hemicellulose and insoluble pectin, whereas cold storage mitigates this effect. After 3 days at room temperature, the average of firmness decreased by 23.7% in the five cultivars, compared to 12.7% under cold storage. Total soluble solids increase during storage, enhancing sweetness, especially at room temperature, with ‘Biqi’ increasing from 9.2 to 10.9% at 4 °C. Titratable acidity slightly decreased over time: the value for ‘Biqi’ decreased from 1.2% to 0.95% at room temperature and 1.1% at 4 °C. Citric, malic, and tartaric acid generally declined at room temperature but stabilized under cold storage. Sucrose, fructose, and glucose increased or remained stable, with significant varietal differences. Our results indicate that storing Chinese bayberry at 4 °C effectively preserves its quality and extends postharvest life. These findings underscore ethylene’s key role in regulating ripening, postharvest quality, and shelf life by influencing fruit color, firmness, and overall consumer appeal.
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Materials Today Communications
·
2024
·
IF 3.7
Xiaoyan Li,Fuxun Qi,Jixiang Zhu,Xinsheng Niu,Shengbing Yang,Deng-Guang Yu
Constructing bio-based antibacterial composite multilayer coatings with sustained drug release is important for reducing the infection risk of bone tissue repair. In this paper, a layer-by-layer aqueous electrodeposition method was applied to prepare a bio-based composite coating of chitosan, hyaluronic acid, and chitosan quaternary ammonium salt on the titanium surface. By pretreating with poly (acrylic acid), controlling the electrochemical deposition process, and post-treating with glutaraldehyde, a multi-layer composite coating with a smooth surface, good interface bonding with the titanium substrate, and a thickness more than ten microns was obtained. The composite coating was used as a drug-carrying system for gentamicin sulfate, which showed obvious antibacterial effects against Escherichia coli and Staphylococcus aureus . The bio-based composite coating with a sandwich structure loaded with antibiotics effectively inhibited the burst release of antibiotics, and the 14-day release rate is only 68.4 ± 2.1 %, achieving sustained release of the drug. The hydrophilic chitosan quaternary ammonium salt on the surface of the composite coating can effectively inhibit the early adhesion of bacteria, while the slow release of gentamicin sulfate in the interlayer can exert a long-lasting antibacterial effect. The preparation of bio-based antibacterial composite coatings using a layer-by-layer electrodeposition strategy has promising applications in titanium orthopedic implants.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yongfa Yu,Xuefei Feng,Yunxiao Jian,Yonheng Shen,Xinming Nie,Wenlin Jia,Qian Wang,Lulu Qu,Shuang Zhao
The eutrophication of water bodies and rapid industrial development have generated large amounts of algae-laden water and heavy metal wastewater. Herein, algal organic matters (AOMS), a traditional pollutant, was extracted from algae-laden water and used as a flocculant to remove heavy metal ions (HMs), achieving the mutual treatment of two pollutants. Furthermore, the coagulation kinetics was studied via online monitoring of floc size, and the mutual removal mechanism of AOMS and HMs was explored using density functional theory (DFT) calculations. Results show that the main components of AOMS in this study are polysaccharides, proteins, and humic acids, which contain functional groups such as –OH, –COOH, and –NH 2 that can coordinate and complex with HMs to form micro-flocs. At the same time, due to the bridging effect of the AOMS molecular skeleton, flocs can grow rapidly. With the rise of AOMS dosages, the removal efficiency of HMs gradually increases, ultimately reaching 86.7 % (Cu 2+ ), 81.6 % (Zn 2+ ), and 77.2 % (Cd 2+ ), respectively. Furthermore, higher pH values can cause deprotonation on AOMS surface, which enhances the conjugated coordination effect, further improving the coagulation efficiency. DFT calculations indicate that the adsorption binding energies between each point on AOMS and HMs are considerably different, and the strongest binding ability is observed between Cu 2+ and AOMS in mixed-HMs solutions, followed by Zn 2+ and Cd 2+ . In summary, the synchronous coagulation process of AOMS and HMs realizes the rational reuse of algae-laden water and meanwhile provides a feasible solution for the efficient, low-carbon, and low-cost treatment of heavy metal wastewater.
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危险品化学品经营许可证（带存储）