COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Na Li,Shaobai Wen,Chunwei Yu
Sodium alginate (SA) hydrogels have been extensively utilized for pollutant removal from wastewater due to the distinct properties of hydrophilicity, biocompatibility and reusability. However, the limited functional groups and poor adsorption capacity have hindered their applications. In this study, a novel hybrid hydrogel bead, composed of sodium alginate, attapulgite, and zeolitic imidazole framework-8 (SA/ATP/ZIF-8), was synthesized using a one-pot blending and ion cross-linking method for adsorptive removal norfloxacin (NOR) from aqueous solutions. The incorporation of ATP and ZIF-8 significantly enhanced the thermal stability and anti-swelling properties of the SA hydrogel beads. The effects of solution pH, contact time, initial NOR concentration, temperature, and the presence of coexisting substances on NOR uptakes were systematically investigated. The results demonstrated that the NOR uptake on SA/ATP/ZIF-8 hybrid hydrogel beads was significantly higher than that of the pure SA and SA/ATP hydrogel beads, and the maximum theoretical adsorption capacity of SA/ATP/ZIF-8 for NOR was 1360.67 mg/g at pH 5.0. Furthermore, the adsorption kinetic was well-described by a pseudo-second-order model, while the adsorption isotherm was most accurately represented by the Langmuir-Freundlich model. In tests conducted with Nandu River water, the SA/ATP/ZIF-8 exhibited removal efficiencies of 100 % for NOR at an initial concentration of 0.0015 mmol/L and 71 % at 0.015 mmol/L. Spectroscopic characterization and adsorption performance experiments indicated that the adsorption of NOR onto SA/ATP/ZIF-8 involved multiple mechanisms, including hydrogen bonding, electrostatic adsorption, cation exchange, π-π electron donor-acceptor interaction (EDA), and coordination. Consequently, the remarkable features of SA/ATP/ZIF-8 hydrogel beads highlight their great potential and promising practicability for separation and removal of lower-concentration antibiotics from wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Desalination and Water Treatment
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2016
·
IF 1.272
Manfeng Li,Zhaomei Wang,Bingjie Li
A cellulose/chitosan hydrogel bead was prepared by extruding and regenerating the blends from ionic liquid 1-ethyl-3-methylimidazolium acetate ([Emim]Ac) in ethanol. FT-IR, scanning electron microscopy (SEM) and X-ray powder diffraction techniques were used to prove the successful blending of both natural polymers (cellulose and chitosan). Brunauer–Emmet–Teller surface area and pore diameter analysis showed that the beads were nanoporous with pores measuring from 10 to 20 nm. Batch adsorption experiments demonstrated that the bead had a maximum adsorption capacity of 40 mg/g for congo red (CR) dye removal from aqueous solutions, which was more efficient than the most reported natural biosorbents. The CR adsorption capacity at equilibrium was related to initial CR concentration, dosage of beads and pH values of the CR solution. When the initial concentration of CR was 30 mg/L, and the adsorbent dosage was 2.0 g/L, the equilibrium of adsorption was reached within 115 min with the removal rate of 89.6%. The Langmuir model represented the adsorption isotherm data and the experimental results followed a pseudo-second-order rate model, indicating that intraparticle diffusion dominated the adsorption process. The cellulose/chitosan hydrogel beads can be used as an efficient adsorbent for dye contaminant removal from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
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IF 2.567
Lishen Shan,Yunling Gao,Yuanchang Zhang,Wubin Yu,Yujun Yang,Shaochuan Shen,Songhong Zhang,Lingyu Zhu,Linhong Xu,Bing Tian,Junxian Yun
Alginate-based cryogel beads loaded with urea and phosphates were fabricated by the microinjecting and cryo-cross-linking method and coated with ethyl cellulose films, and their properties were investigated. The cryogel beads had narrow diameter distributions and fracture-like supermacropores with the width of 1 to 3 μm and length up to more than 30 μm. Their porosities were from 74.9% to 92.2%, and the diameters were influenced by the microtube diameter, the injection flow velocity, and the freezing temperature. The cryogel beads had higher loading capacities of 13.4 mg phosphates and 33.2 mg urea/g wet bead, and the release rate of phosphates was much lower than that of urea. The beads with coating-films with the thickness of 3 to 8 μm had a lower release rate for phosphates than those without films. The inherent characteristic of alginate beads to be fully biodegradable makes them an interesting candidate for the bioremediation of coastal sediments.
研究领域:
环境科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
Polymers
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2021
·Vol. 13
·期 22
·3890
·
IF 4.329
Chenlu Jiao,Die Liu,Nana Wei,Jiannan Gao,Fan Fu,Tao Liu,Jian Wang
Porous sustainable cellulose/gelatin/sepiolite gel beads were fabricated via an efficient ‘hydrophilic assembly–floating droplet’ two-step method to remove Congo red (CR) from wastewater. The beads comprised microcrystalline cellulose and gelatin, forming a dual network framework, and sepiolite, which acted as a functional component to reinforce the network. The as-prepared gel beads were characterized using FTIR, SEM, XRD, and TGA, with the results indicating a highly porous structure that was also thermally stable. A batch adsorption experiment for CR was performed and evaluated as a function of pH, sepiolite addition, contact time, temperature, and initial concentration. The kinetics and isotherm data obtained were in agreement with the pseudo-second-order kinetic model and the Langmuir isotherm, with a maximum monolayer capacity of 279.3 mg·g−1for CR at 303 K. Moreover, thermodynamic analysis demonstrated the spontaneous and endothermic nature of the dye uptake. Importantly, even when subjected to five regeneration cycles, the gel beads retained 87% of their original adsorption value, suggesting their suitability as an efficient and reusable material for dye wastewater treatments.Keywords:microcrystalline cellulose;gelatin;sepiolite;beads;dye;adsorption
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
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2025
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IF 8
Hang Liu,Yikun Liu,Shengfeng Peng,Lei Zhou,David Julian McClements,Suqiong Fang,Wei Liu
In this study, the application of banana-derived extracellular vesicles (EVs) as natural carriers for hydrophobic nutraceuticals was investigated for the first time. Curcumin was solubilized in an amorphous state within the hydrophobic domains of the EVs in banana juice. The bioaccessibility of the curcumin was considerably higher in the curcumin-loaded EVs (CEVs) than for pure curcumin crystals. The retention/release behavior of the curcumin in the CEVs was regulated by incorporating the curcumin-loaded banana juice into hydrogel beads, which were assembled from sodium alginate and banana pectin. The pectin and D-galacturonic acid contents of the banana juice were 0.87 % ± 0.11 % and 0.58 % ± 0.08 %, respectively. With the introduction of sodium alginate, the sphericity, hardness, chewiness, water holding capacity, surface smoothness and other physiochemical properties of the hydrogel beads were improved. Fourier Transform infrared analysis showed that hydrogen bonding played an important role in the formation of the hydrogel beads. The hydrogel beads had a higher swelling ratio under neutral conditions than under acidic conditions. Encapsulation of the curcumin-loaded banana juice within the hydrogel beads retarded curcumin release and enhanced the therapy potential of ulcerative colitis, which indicated that these delivery systems could be designed to regulate the release profile of the CEVs. Encapsulation of the curcumin also improved its resistance to heating, exposure and storage. In summary, we have shown that encapsulation of curcumin within plant-based EVs loaded into hydrogel beads can improve its functional performance.
研究领域:
食品科学
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药理学
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生物技术
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 16
·16482-16492
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IF 2.914
Tong Dongshen,Fang Kai,Yang Haiyan,Wang Jie,Zhou Chunhui,Yu Weihua
Sodium alginate (SA) is a linear biopolymer, which is the nontoxic, biodegradable, and rich in carboxyl and hydroxyl groups. In the paper, the SA-based hydrogel bead was prepared by the cationic hectorite clay and anionic sodium alginate with a simple ionic gelation method under freeze-drying, and the adsorption properties were evaluated by the removal of copper ions from aqueous solutions. The composites were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherm (BET), thermal analysis (TG), and Fourier transform infrared spectroscopy (FT-IR). The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data and the Langmuir, Freundlich, Dubinin–Radushkevich (D-R), and Temkin models were applied to describe the adsorption isotherms. The results showed that the adsorption process was found to follow the Freundlich isotherm model and the maximum sorption capacity was observed to be 160.28 mg/g under the initial concentration from 10 to 700 mg/L at 45 °C. Adsorption kinetics data fitted well with pseudo-second-order rate model. The porous structure of the composite was responsible for the adsorption of Cu 2+ ions. But the adsorption ability could be improved by pH. Finally, the adsorption mechanism was suggested.
Graphical abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Foods
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2023
·Vol. 12
·期 11
·2256
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IF 5.2
Yachun Huang,Lin Zhang,Jielun Hu,Huan Liu
The objective of this research was to encapsulate probiotics by alginate hydrogel beads based on an in situ cultivation method and investigate the influences on the cell loading capacity, surface and internal structure of hydrogel beads and in vitro gastrointestinal digestion property of cells. Hydrogel beads were prepared by extrusion and cultured in MRS broth to allow probiotics to grow inside. Up to 10.34 ± 0.02 Log CFU/g of viable cell concentration was obtained after 24 h of in situ cultivation, which broke through the bottleneck of low viable cell counts in the traditional extrusion method. Morphology and rheological analyses showed that the structure of the eventually formed probiotic hydrogel beads can be loosed by the existence of hydrogen bond interaction with water molecules and the internal growth of probiotic microcolonies, while it can be tightened by the acids metabolized by the probiotic bacteria during cultivation. In vitro gastrointestinal digestion analysis showed that great improvement with only 1.09 Log CFU/g of loss in viable cells was found after the entire 6 h of digestion. In conclusion, the current study demonstrated that probiotic microcapsules fabricated by in situ cultivation method have the advantages of both high loading capacity of encapsulated viable cells and good protection during gastrointestinal digestion.Keywords:microencapsulation;probiotic;alginate;hydrogel beads;in situ cultivation
研究领域:
生物技术
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食品科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2024
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IF 5.7
Chonghui Wei,Shu Zhu,Jiacheng Lu,Aoran Guan,Yan Sun,Liyun Zeng,Jinghao Fu,Xingyu Luo
Background Hydrogen peroxide (H 2 O 2 ) plays a vital role in human health and have been regarded as a crucial analyte in metabolic processes, redox transformations, foods research and medical fields. Especially, the long-time and excessive digestion of H 2 O 2 may even cause severe diseases. Although conventional instrumental methods and nanozymes-based colorimetric methods have been developed to accomplish the quantitative analysis of H 2 O 2 , the drawbacks of instrument dependence, cost-effectiveness, short lifespan, non-portable and unsustainable detection efficacies will limit their applications in different detection scenarios. Results Herein, to address these challenges, we have proposed a novel strategy for nanozyme (RuO 2 ) hydrogel preparation by the solid support from cross-linked polyvinyl alcohol (PVA) and chitosan (CS) to both inherit the dominant peroxidase-like (POD) activity and protect the RuO 2 from losing efficacies. Taking advantages from the hydrogel, the encapsulated RuO 2 were further prepared as the regularly spherical beads (PCRO) to exhibit the sustainable, recyclable, and robust catalysis. Moreover, the intrinsic color interferences which originated from RuO 2 can be avoided by the encapsulation strategy to promote the detection accuracy. Meanwhile, the high mechanical strength of PCRO shows the high stability, reproducibility, and cyclic catalysis to achieve the recyclable detection performance and long lifetime storage (40 days), which enables the sensitively detection of H 2 O 2 with the detection limit as lower to 15 μM and the wide detection linear range from 0.025 to 1.0 mM. Significance On the basis of the unique properties, PCRO has been further adopted to construct a smartphone detection platform to realize the instrument-free and visual analysis of H 2 O 2 in multi-types of milk and real water samples through capturing, processing, and analyzing the RGB values from the colorimetric photographs. Therefore, PCRO with the advanced detection efficacies holds the great potential in achieving the portable and on-site analysis of targets-of-interest.
研究领域:
生物化学
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材料科学
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医学检测
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
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2025
·Vol. 15
·期 6
·456
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IF 4.3
Ruixing Ge,Jiaji Wang,Junlong Piao,Zhenghua Pan,Zhehao Zhang,Yating Yang,Jin Huang,Zhiguo Liu
Green-synthesized gel materials can efficiently absorb and remove organic dyes from wastewater. This investigation designed and synthesized a novel modification method of sodium alginate gel beads based on the protein glycosylation reaction (Maillard reaction) using green chemistry principles. The prepared gel beads were subsequently applied to examine their efficacy in adsorbing the organic dye methylene blue. The adsorption process and mechanism were characterized and analyzed. At an adsorption equilibrium of 300 K, the adsorption value can reach 908 mg/g. The dry casein glycosylated gel beads synthesized in this study demonstrate the potential for further development as a novel adsorbent for organic dyes in wastewater.
研究领域:
环境科学
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材料科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Meiling Yang,Xiaolin Liu,Yunchuan Qi,Wen Sun,Yi Men
A series of environmental-friendly adsorbents, κ-carrageenan/graphene oxide gel beads (κ-Car/GO GBs), were synthesized from κ-carrageenan and graphene oxide via a simple method. The composition and morphology of these gel bead adsorbents were characterized by Fourier transform infrared spectroscopy , Raman spectroscopy , X-ray photoelectron spectroscopy, thermogravimetric analysis , scanning electron microscopy, etc. The adsorption ability of κ-Car/GO GBs was investigated by measuring the removal of methylene blue (MB) from aqueous solutions. The effects of the initial dye concentration, adsorption time, temperature and pH value were evaluated. The results of the adsorption experiments were consistent with the Langmuir model, while the adsorption kinetic data were fit with a pseudo-second-order model. The maximum adsorption capacity of κ-Car/GO GBs for MB is 658.4 mg/g at 25 °C, which barely declined even after five cycles. Hence, the κ-Car/GO GBs are outstanding adsorbents with high adsorption capacity and excellent regeneration ability. Furthermore, the gel bead adsorbents could be easily separated from aqueous solutions after adsorption using a simple filtration method.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Zhiying Shao,Xiaoyi Jiang,Qinlu Lin,Simiao Wu,Siming Zhao,Xinyang Sun,Yunhui Cheng,Yong Fang,Peng Li
The presence of potentially toxic elements and compounds poses threats to the quality and safety of fruit juices. Among these, Hg(II) is considered as one of the most poisonous heavy metals to human health. Traditional chitosan-based and selenide-based adsorbents face challenges such as poor adsorption capacity and inconvenient separation in juice applications. In this study, we prepared nano‑selenium functionalized chitosan gel beads (nanoSe@CBs) and illustrated the synergistic promotions between chitosan and nanoSe in removing Hg(II) from apple juice. The preparation conditions, adsorption behaviors, and adsorption mechanism of nanoSe@CBs were systematically investigated. The results revealed that the adsorption process was primarily controlled by chemical adsorption. At the 0.1 % dosage, the adsorbent exhibited high uptake, and the maximum adsorption capacity from the Langmuir isotherm model could reach 376.5 mg/g at room temperature. The adsorbent maintained high adsorption efficiency (> 90 %) across a wide range of Hg(II) concentrations (0.01 to 10 mg/L) and was unaffected by organic acids present in apple juice. Additionally, nanoSe@CBs showed negligible effects on the quality of apple juice. Overall, nanoSe@CBs open up possibilities to be used as a safe, low-cost and highly-efficient adsorbent for the removal of Hg(II) from juices and other liquid foods.
研究领域:
食品科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Xiangxian Li,Hengfeng Zhu,Xuanru Wei,Quanling Yang,Chuanxi Xiong,Zhuqun Shi
Activated carbon is extensively utilized in blood purification applications. However, its performance has been significantly limited by their poor blood compatibility. In this work, 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCN) and activated carbon (AC) were used to form composite beads by the drop curing method to improve hemocompatibility. The TOCN/AC composite beads had porous surface and exhibited extraordinary adsorption properties. The beads had a high adsorption capacity for creatinine with the optimal adsorption capacity of 83.33 mg g −1 . And the equilibrium adsorption of bilirubin, uric acid and Cu 2+ by TOCN/AC beads was as high as 159.80 mg g −1 , 114.61 mg g −1 and 154.0 mg g −1 , respectively, with a mass ratio of TOCN to AC of 1:4. It is also observed that the adsorption behavior of TOCN/AC beads on creatinine was consistent with the second-order kinetics and Langmuir isothermal model. The hemolysis rate of TOCN/AC was 1.21 %, indicating that TOCN/AC beads had good blood compatibility. The clearance of creatinine toxin in blood by TOCN/AC beads was as high as 87 % within 90 min. Overall, our produced composite beads had great potential for application in the field of blood purification.
研究领域:
材料科学
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医学工程
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生物医学
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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）