Minerals
·
2024
·Vol. 14
·期 6
·560
·
IF 2.2
Lijinhong Huang,Xiangrong Zeng,Chunyan Fan,Lihong Liu,Shafiq Alam,Bin Zeng,Shaomin Liu,Wanfu Huang,Ronghua Shu
It is important to recover La3+from metallurgical solutions or wastewater. However, the recovery rate of La3+is usually less than 1% and the recovery methods are not environmentally friendly or user-friendly. Therefore, a straightforward, efficient, clean, and economically friendly method is needed. In this investigation, a modified adsorbent, COSAC-Na2EDTA-15, which was made from theCamellia oleiferashell (COS) and disodium ethylenediaminetetraacetic acid (Na2EDTA), was invented. In addition, characterization of the COSAC-Na2EDTA-15 adsorbent was conducted using SEM and XPS, and the principle of adsorption was revealed. The adsorption kinetics followed P-S-O KM, while the isotherm of COS-activated carbon (COSAC) aligned more closely with the Langmuir model. Compared to COSAC, the maximum La3+adsorption capacity of COSAC-Na2EDTA-15 increased from 50 to 162.43 mg/g, and the content of O and N changed from 7.31% and 1.48% to 12.64% and 4.15%, respectively. The surface of the COSAC-Na2EDTA-15 exhibited abundant C, N, and O elements, and La3+was detected on the sample surface after adsorption. The test and analysis results fully indicate that La3+can be successfully adsorbed on the surface of COSAC-Na2EDTA-15. Because of its easy preparation, low cost, and superior performance, activated carbon made from COS finds extensive applications in the adsorption and recovery of rare earth elements.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuejie Qiu,Leping Zhang,Fenglun Zhang,Xichuang Cheng,Li Ji,Jianxin Jiang
XOS production from lignocellulose using organic carboxylic acids and alkyd acids has been widely reported. However, it still faces harsh challenges such as high energy consumption, high cost, and low purity. Pyruvic acid (PYA), a carbonyl acid with carbonyl and carboxyl groups, was used to produce XOS due to its stronger catalytic activity. In this work, XOS was efficiently prepared from COS in an autoclave under the condition of 0.21 M PYA-121 °C-35 min. The total yield of XOS reached 68.72 % without producing any toxic by-products, including furfural (FF) and 5-hydroxymethylfurfural (5-HMF). The yield of xylobiose (X 2 ), xylotriose (X 3 ), xylotetraose (X 4 ), and xylopentaose (X 5 ) were 20.58 %, 12.47 %, 15.74 %, and 10.05 %, respectively. Meanwhile, 89.05 % of lignin was retained in the solid residue, which provides a crucial functional group for synthesizing layered carbon materials (SRG-a). It achieves excellent electromagnetic shielding (EMS) performance through graphitization, reaching −30 dB at a thickness of 2.0 mm. The use of a PYA catalyst in the production of XOS has proven to be an efficient method due to lower temperature, lower acid consumption, and straightforward operation.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Luowen Sun,Jiayi Zhong,Hongyang Zhou,Xiaoqi Liu,Jin Gu,Chuanshuang Hu,Xiuyi Lin
Camellia oleifera shells (COS) are agricultural by-products that commonly discarded and burned, causing pollution to the environment. Due to their high holocellulose content, COS present a promising and cost-effective biomass resource, retaining both cellulose and hemicellulose. Leveraging this potential, holocellulose separators were fabricated via dissolution-regeneration and nonsolvent-based phase separation methods. The obtained holocellulose separator demonstrated a high porosity rate of 68.2 %, good thermal stability (to 190°C) and high ionic conductivity in sodium-ion batteries (2.38 mS/cm). Furthermore, the battery assembled with the holocellulose separator exhibited higher specific capacity and better stability compared to those using glass fiber separators, highlighting its potential for sustainable and high-value applications.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2017
·Vol. 22
·期 10
·1562
·
IF 2.861
Tai-Mei Di,Shao-Lan Yang,Feng-Yu Du,Lei Zhao,Tao Xia,Xin-Fu Zhang
One new and three known triterpenoid saponins were isolated and identified fromCamellia oleiferaseeds through IR, NMR, HR-ESI-MS and GC-MS spectroscopic methods, namely oleiferasaponin A3, oleiferasaponin A1, camelliasaponin B1, and camelliasaponin B2. The structure of oleiferasaponin A3was elucidated as 16α-hydroxy-21β-O-angeloyl-22α-O-cinnamoyl-23α-aldehyde-28-dihydroxymethylene-olean-12-ene-3β-O-[β-d-galactopyranosyl-(1→2)]-[β-d-xylopyranosyl-(1→2)-β-d-galactopyranosyl-(1→3)]-β-d-gluco-pyranosiduronic acid. Camelliasaponin B1and camelliasaponin B2exhibited potent cytotoxic activity on three human tumour cell lines (human lung tumour cells (A549), human liver tumour cells (HepG2), cervical tumour cells (Hela)). The hypoglycemic activity of oleiferasaponin A1was testified by protecting pancreatic β-cell lines from high-glucose damage.Keywords:Camellia oleifera;triterpenoid saponin;oleiferasaponin A3;cytotoxic activity;hypoglycemic activity
研究领域:
植物化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2025
·Vol. 48
·期 1
·e70082
·
IF 2.8
Bincheng Gong,Lingqi Shen,Yu Wang,Zuguang Li,Guohua Zhu
Tea saponin has garnered tremendous interest for its potential use in surfactant and drug synthesis. This research was designed to develop a technique based on pH-responsive switchable deep eutectic solvents (SDESs) for extracting tea saponins from Camellia oleifera seed meal. SDES synthesized from hexanoic acid and triethanolamine (1:1 molar ratio) offered the optimum extractive performance and the optimal conditions were obtained through single-factor experiments: 30 wt% water content in SDES, solid-liquid ratio of 1:30 g/mL, 60°C extraction temperature, 30 min extraction time, and acid volume of 1500 µL. The extraction yield was 162.14 mg/g after optimization, which increased by 15.65% and 9.47% compared to water and ethanol extraction methods, respectively. After pH adjustment, 98.95% of the tea saponins were recovered in the bottom phase. After precipitation and freeze-drying procedures, the purity of the tea saponin solid was 62.9%.
研究领域:
食品科学
·
环境科学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xinjin Yu,Zhimei Zhao,Xiaoli Yan,Jianhua Xie,Qiang Yu,Yi Chen
Traditional organic solvent extractions of tea saponins have many drawbacks. This study aimed to establish an environment-friendly and efficient technology based on deep eutectic solvents (DESs) to extract tea saponins from Camellia oleifera seed meal. The solvent consisting of choline chloride and methylurea was screened as optimal DES. Under the optimal extraction conditions obtained by response surface methodology, the extraction yield of tea saponins reached 94.36 mg/g, which increased by 27% compared with ethanol extraction, while the extraction time was reduced by 50%. Analysis of UV, FT-IR, and UPLC-Q/TOF-MS indicated tea saponins did not alter during DES extraction. Surface activity and emulsification evaluation showed that extracted tea saponins could reduce interfacial tension at the oil–water interface with excellent foamability and foam stability, and they could form nanoemulsions ( d 32 < 200 nm) with excellent stability. This study provides a suitable approach for the efficient extraction of tea saponins.
研究领域:
食品科学
·
植物化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Xianyue Liang,Zhixiang Huang,Yonghui Zhou,Chuanshuang Hu,Dengyun Tu,Litao Guan
The preparation of wood-plastic composites (WPCs) with high filling fibers and excellent physical properties remained a great challenge. This study used Camellia oleifera shell (COS, agroforestry product waste) as raw material, and prepared 60 wt% COS/high-density polyethylene (HDPE) WPCs using profile extrusion method through pretreating fibers including hot water, hot steam, alkali, acid, extraction, and fine fiber screening. After pretreatments, the relative contents of cellulose and lignin increased, the relative contents of hemicellulose and extract decreased significantly, and the length-diameter ratio was improved. The flexural strength, tensile strength and impact strength of hot water and steam heat treated composites reached 31.4, 17.1 MPa and 6.9 kJ/m 2 , 31.8, 16.8 MPa and 6.7 kJ/m 2 , respectively. Compared with untreated 28.8, 14.7 MPa and 5.5 kJ/m 2 , the advantages were more obvious. Alkali treatment and acid treatment improved the thermal stability and residue rate of the material. Extraction treatment and alkali treatment significantly reduced the processing torque force, which was conducive to processing, while acid treatment was the opposite. The highest water absorption and thickness expansion rate were 13.75% and 3.60% respectively at 7 days after alkali treatment, which were considerably higher than 5.60% and 0.78% without treatment, while other pretreatments improved the dimensional stability of the material. Highlights High filling Camellia oleifera shell waste/HDPE composites were prepared. Physical and chemical pretreatments improved interfacial adhesion of the composites. Heat treatments significantly improved mechanical performance of the composites.
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Yanzhi You,Xiankun Zhang,Pengfei Li,Fuhou Lei,Jianxin Jiang
Camellia oleifera shell (COS) is a worthy byproduct in woody edible oil production enriched in hemicellulose and lignin. This paper aims to explore the high-value transformation of COS for the production of xylooligosaccharides (XOS) with main degree of polymerization (DP) of 2–5 by the catalysis of ZnCl 2 . The effect of pretreatment temperature, reaction time and ZnCl 2 concentration on the contents and DP distributions of XOS were analyzed. Moderate reaction conditions tended to achieve high content XOS, and the maximum value 61.38% and 14.39 g/L of XOS yield and concentration, respectively, peaked at 170 °C for 30 min using 0.5% (w/w) ZnCl 2 . The first time the solid residues derived from the production process of XOS were used as the precursor for the co-production of activated carbons (AC). The maximum iodine values and BET surface area were 5623.94 mg/g and 1244.46 m 2 /g, respectively, using 2.20 M ZnCl 2 as the activating agent .
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Innovative Food Science & Emerging Technologies
·
2025
·
IF 6.8
Xiangyan Mo,Fangxue Hang,Er-Fang Ren,Lili Gai,Kai Li,Debao Niu
Camellia oleifera ( C. oleifera ) shells, a major by-product of the camellia oil industry, are rich in tea saponins. The efficient extraction and characterization of tea saponins from C. oleifera shells using deep eutectic solvents (DESs) were investigated, with the extraction mechanism further explored through scanning electron microscopy (SEM) and molecular dynamics simulations. A total of 24 different types of DESs were prepared, with the optimal DES identified as a combination of L-proline and acetamide (the molar ratio of 1:4). Response surface methodology (RSM) optimization revealed that the maximum yield of tea saponins extraction reached 22.46 %. 18 kinds of tea saponin monomers were identified by ultrahigh-performance liquid chromatography coupled with quadrupole-orbitrap high-resolution mass spectrometry (UPLC-Q-Orbitrap HRMS). SEM analysis showed that DESs effectively disrupted the surface structure of C. oleifera shell. Furthermore, molecular dynamics simulations demonstrated the high extraction efficiency of DESs was due to their larger solvent accessible surface area (SASA), increased number of hydrogen bonds, extended hydrogen bond lifetime, and lower intermolecular interaction energy between DESs and tea saponins. These findings provide new insights into the extraction mechanism and contribute to the optimization of DES-based extraction techniques for bioactive compounds from natural plant sources.
研究领域:
植物化学
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Guanfeng Deng,Pingjin Li,Heng Liang,Tao Chen,Lijun Zhou,Hongyu Yang,Xiaoyu Jiang,Chunbang Ding,Shiling Feng
Camellia oleifera leaves were byproduct of the C. oleifera industry which was rich in polysaccharides. Deep eutectic solvent-dual enzyme system (DES-dEAE) was established to achieve the simultaneous hydrolysis reaction of dual enzymes and DES extraction. Currently, there was a lack of research methods that simultaneously deal with the relationship between DES and enzymes and the effect of DES on the polysaccharide extraction rate. In the study, artificial neural network (ANN) and conductor-like screening model for real solvents (COSMO-RS) were used to screen the most suitable DES by predicting the pH and activity coefficient of DESs. Choline chloride and sorbitol constituted the best DES and were used to optimize the process conditions of DES-dEAE by response surface method (RSM). The polysaccharide yield was verified to be 21.46 mg/g with the optimal process conditions: liquid-solid ratio of 33:1, enzyme ratio of 3:1, extraction time of 15 min and water content of 40 %. The C. oleifera polysaccharides obtained by water, DES, and DES-dEAE extractions were observed by scanning electron microscopy and cell wall damage effect of DES-dEAE was confirmed microscopically. The study optimized the complex polysaccharide extraction system using bioinformatics methods, contributing new ideas to the development of simulated extraction.
研究领域:
植物学
·
生物化学
·
食品科学
·
计算生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Changyang Qiu,Zhihong Chen,Fenjuan Hu,Hailing Wu,Lu Wang,Meixia Liu,Kai Zhou
The seed cake of Camellia oleifera Abel. (SCOC), a big residue produced after Camellia oil extraction, enriches with many bioactive components. However, it is often discarded directly due to the lack of cost-effective extraction. Herein, a three-phase partitioning (TPP) system is first time tried for the simultaneous extraction of three major ingredients i.e. residual oil, protein, and polysaccharide from SCOC. Results from the extraction yields show that the established method is more efficient or at least comparable to conventional techniques. The developed method takes only 1.5 h and can be carried out at mild temperature of 40 °C, making it a cost-effective method. The successful scaling up of the extraction system at a 30 L extraction tank confirms its scalability. Furthermore, compared with conventional extraction methods, the TPP extracts shows better product quality. These facts, along with simultaneous extraction features of the method, allow us to use TPP as a promising extraction technology of SCOC biomolecules.
研究领域:
生物技术
·
食品科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2023
·Vol. 249
·期 7
·1875-1885
·
IF 3.3
Lu Yuanchao,Hou Rongrong,Li Mengren,Yu Ningxiang,Huan Weiwei,Nie Xiaohua,Meng Xianghe
Camellia oleifera Abel is a traditional and high-quality oil source in China, characterized as polyphenols. This study evaluated how extraction methods impacted the phenolic profiles and antioxidant activities of Camellia oils. The contribution rates of phenolic profiles to antioxidant activities were investigated. HPLC and UPLC-Triple-TOF/MS demonstrated that phenolic content significantly varied with extraction methods while phenolic profiles were not. Herein, 15, 15, 17, 14, and 14 compounds were identified in mechanical pressing (MP), solvent extraction-hexane (SE-H), solvent extraction-ethanol (SE-E), aqueous enzymatic extraction (AEE), aqueous extraction (AE) oils, respectively. Results presented that SE-E oils were rich in phenolic acids (caffeic acid and p-hydroxybenzaldehyde), while AE oils were abundant in flavonoids (rutin and quercetin). Besides, the antioxidant activities of AEE and AE oils were significantly higher than other oils, originating from flavonoids (rutin and quercetin) and non-phenolics (rhododendron acid). Furthermore, Camellia oils from five extraction methods were remarkably classified by principal component analysis based on phenolic categories and antioxidant activities. It was assumed that low-polar and high-polar phenolic profiles were simultaneously transferred into SE-E oils, while only low-polar phenolic profiles (mainly flavonoids) were extracted into AE or AEE oils. The antioxidative origin of Camellia oils was ascribed to rutin, quercetin, and rhododendron acid. Our results provided an in-depth understanding of Camellia oils on phenolic profiles and the relationship between extraction methods and antioxidant activities.
研究领域:
食品科学
·
分析化学
·
植物化学
✓ 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）