Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125271
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IF 7.5
Jun Xie,Rui Wang,Dawei Chen,Yi Wang,Xianzhong You,Dengying Wang,Hengxing Xie
Sodium Alginate-Chitosan capsule for aerobic microorganisms (SA-CS-AMC) was prepared. • The SA-CS-AMC achieved an optimal oxygen consumption rate of 96.26%. • The SA-CS-AMC demonstrated good environmental adaptability. • SA-CS-AMC demonstrated excellent effectiveness in suppressing the spontaneous combustion of coal. Free aerobic microorganisms are prone to inactivation under harsh conditions in mine shafts, exhibit weak reproductive capacity, and have a short effective period, resulting in poor suppression of coal spontaneous combustion. Therefore, the research utilized Sodium Alginate (SA) and Chitosan (CS) to encapsulate aerobic microorganisms, resulting in the preparation of microbial capsules (SA-CS-AMC) with high oxygen consumption capacity and strong environmental tolerance. Using the Box-Behnken response surface design, SEM, environmental stress tests, physical property evaluations, programmed temperature experiment, and FTIR, we investigated the influence patterns and interactions of SA concentration, CS concentration, and second crosslinking time on the oxygen consumption performance of SA-CS-AMC. This revealed the mechanism by which SA-CS-AMC suppresses coal spontaneous combustion. Research findings indicated that when the SA concentration was 1.4%, the CS concentration was 0.8%, and the second crosslinking time was 37 min, the SA-CS-AMC exhibited the highest oxygen consumption rate of 96.26% after 48 h. Under the protection of the capsule, the aerobic microorganisms' tolerance ranges for temperature and pH were expanded to 25–40°C and 6.0–8.0, respectively. The SA-CS-AMC-treated coal sample exhibited a delayed crossing point temperature of 38.2°C compared with raw coal during combustion, demonstrating superior suppression effects compared to the free microbial treatment group. SA-CS-AMC effectively deactivated active functional groups in coal, with the peak areas for hydroxyl and oxygen-containing functionalities decreasing by 52.80% and 46.09%, respectively, thereby significantly reducing the coal's tendency toward spontaneous combustion. This paper presents a novel, highly effective microbial technology solution for preventing and controlling coal spontaneous combustion. Download: Download high-res image (165KB) Download: Download full-size image First, the optimal preparation parameters for Sodium Alginate-Chitosan aerobic microbial capsules(SA-CS-AMC) were determined through response surface design. Subsequently, SEM observations revealed the three-dimensional network structure and microbial loading within the capsules. Environmental stress and physical property tests confirmed their excellent environmental adaptability, mass transfer efficiency, and water retention capacity. Furthermore, programmed temperature-gas chromatography and FTIR analyses elucidated the microscopic mechanisms by which these capsules inhibit coal spontaneous combustion. In summary, this study provides a theoretical basis for the application of SA-CS-AMC in the prevention and control of coal spontaneous combustion.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Hongping Tong,Zheng Xing,Yihan Wang,Zonglin Li,Shuangqing Li,Qingguo Zhang
The imidazolium ionic liquid is introduced into the traditional dual-network hydrogel via irregular aggregation. • The hydrogels exhibit high voltage windows and high sensitivity due to the synergistic effect. • The carbon-based hydrogel is applicable to wearable flexible electronic devices. The uneven dispersion of carbon particles restricts the mechanical properties and electrical conductivity of carbon-based nanomaterials, thus hindering their widespread application in wearable flexible electronic devices. Herein, imidazolium ionic liquids (ILs) in an irregularly aggregated form are perfectly incorporated into the polymer molecular chains of polyacrylamide/sodium alginate (PAM/SA) hydrogels. Interface and kinetic simulations clarify that the ionic liquid (IL) not only reinforces the hydrogel network structure, but also effectively improves the dispersion of graphite (KS-6), enhances the hydrogel's electrochemical performance, and endows the hydrogel with multiple excellent properties. The test results show that the composite PAM/SA carbon-based hydrogel achieves a wide voltage window (1.8 V ) and high sensitivity (GF = 7.03). Moreover, the hydrogel's mechanical properties (maximum elongation at break: 613.69%) and electrical conductivity (maximum value: 34.24 mS cm −1 ) are also significantly improved. Furthermore, the application value of this series of hydrogels in energy storage and sensing is demonstrated. For example, they can be used to fabricate flexible capacitors and as sensors to detect human joint movements and subtle vibrations. This research provides a feasible approach for the design of carbon-based hydrogels and an ideal set of candidate materials for the development of flexible electronic devices.
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Applied Sciences-Basel
·
2026
·Vol. 16
·期 9
·4093
·
IF 2.9
Cheng Chen,Pengcheng Xian,Xiong Zhang,Liang Huang,Fengyao Fan,Chunhai Lu,Yanjing Yang
In this study, chicken bone biochar (CBC) was prepared from waste chicken bones via oxygen-limited pyrolysis. A magnetic component (Fe3O4) was introduced, and the composite was embedded in a sodium alginate (SA) gel network, successfully constructing magnetic chicken bone biochar/sodium alginate composite gel beads (M-CBC/SA). The experimental results showed that under the conditions of pH = 4.5, 25 °C, and an adsorbent dosage of 0.5 g/L, the removal efficiency of M-CBC/SA toward 50 mg/L U(VI) reached 91.67%, corresponding to an adsorption capacity of 91.67 mg/g. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, with a theoretical maximum adsorption capacity of 322.58 mg/g, indicating that the adsorption was dominated by monolayer chemisorption. The material exhibited excellent magnetic separability and good anti-interference ability against coexisting ions such as K+, Na+, Cl−, and SO42−, and its adsorption behavior was only weakly affected by ionic strength. Characterization by XRD, FTIR, XPS, SEM-EDS and other techniques revealed that the immobilization mechanism of U(VI) involved the synergistic effects of dissolution–precipitation (the formation of a new autunite phase), surface complexation (involving hydroxyl and phosphate groups), ion exchange (exchange with Ca2+), and electrostatic attraction. Using waste chicken bones as the raw material, this composite achieves both efficient uranium immobilization and convenient magnetic separation, fully embodying the environmental concept of “treating waste with waste”, and shows promising application prospects in the treatment of uranium-containing wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yue Cai,Na Wang,Yongwoo Kim,Jiabao Fan,Can Wang,Ling Liu,Cun Zhu,Yoojung Song,Shixiang Zuo,Xiubo Zhao,Chao Yao,Haoguan Gui
Stable physical integration of TiO 2 NPs into the hydrogel network. • Dynamic mechanical properties and pronounced self‑healing capability. • Excellent biocompatibility, UV‑shielding, and anti‑melanogenic activity. • 98.5% wound closure in a full‑thickness mouse model within 14 days. Excessive UV exposure impedes wound healing by damaging fibroblasts and epithelial cells and stimulates melanocytes to overproduce melanin, leading to post-healing hyperpigmentation. To address this challenge, a dynamic dual-network composite hydrogel was developed via Schiff-base crosslinking between aldehyde sodium alginate (ASA) and carboxymethyl chitosan (CMCS), with titanium dioxide nanoparticles (TiO 2 NPs) incorporated through electrostatic interactions. Based on the dynamic Schiff base chemistry, HAC-TiO 2 - Y hydrogels have good self-healing properties. The incorporation of TiO 2 nanoparticles increases network rigidity and physical crosslinking density. The resulting HAC-TiO 2 - Y hydrogels exhibited excellent biocompatibility, supporting > 85% viability of L929 fibroblasts. It also displayed outstanding UV-blocking capability. Notably, the HAC-TiO 2 -2.5 hydrogel showed concentration-dependent anti-melanogenic activity in B16F10 melanoma cells, reducing intracellular melanin content to 74.2% compared to the control. In a full-thickness mouse wound model, the HAC-TiO 2 -2.5 hydrogel achieved 98.5% wound closure within 14 days, significantly outperforming the TiO 2 -free control. By integrating UV protection with wound healing promotion, this multifunctional hydrogel presents a promising strategy for advanced wound management under UV-exposed conditions. Download: Download high-res image (223KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Guichun Mo,Pei Zhang,Zhenxing Yang,Qi Zheng,Saleem Raza,Imran Shakir,Shaheen Abdulhafez Al-Muhtaseb
Nickel single/dual atoms anchored on MXene boost photocatalytic efficiency. • SA hydrogel framework enhances charge transfer and structural stability. • 97.8% RhB and 88% TCH degradation achieved under visible light. • Strong pH tolerance and adaptability across diverse wastewater conditions. • Excellent recyclability with ∼78% RhB efficiency retained after 10 cycles. The development of efficient, stable, and recyclable photocatalysts is essential for the remediation of complex wastewater pollutants. Herein, an advanced MXene@Ni₁/Ni₂-SA hydrogel was constructed by anchoring atomically dispersed nickel single-atom (Ni₁) and dual-atom (Ni₂) active sites onto conductive MXene nanosheets and immobilizing them within a sodium alginate (SA) three-dimensional framework. This rational design integrates high electrical conductivity, abundant active sites, and structural durability, enabling superior visible-light-driven photocatalytic performance. The MXene@Ni₁/Ni₂-SA hydrogel exhibits excellent activity toward rhodamine B (RhB) and tetracycline hydrochloride (TCH). For RhB, degradation efficiencies exceeded 97.8% under optimal conditions and remained above 90% across pH 2–8, hydrogel dosages of 1–4 g, and initial dye concentrations ranging from 30 to 100 mg L −1 . For TCH, a maximum removal of 88% was achieved at 10 mg L −1 , with >75% degradation maintained even at 30 mg L −1 across a broad pH range (2−12). Kinetic studies revealed high apparent rate constants of 0.063 min −1 and 0.0230 min −1 for RhB and TCH. Reactive species quenching and EPR spectroscopic analyses confirmed that •OH and •O₂ − radicals dominate the degradation pathways, facilitated by efficient charge separation at the Ni atomic sites–MXene interface. The hydrogel demonstrated strong recyclability, retaining ∼78.4% and ∼ 60.0% of its initial activity toward RhB and TCH after ten cycles. This work demonstrates a scalable and structurally robust MXene-based single/dual-atom hydrogel platform with significant potential for practical wastewater treatment. The findings provide new insights into atomically engineered photocatalysts for efficient and sustainable environmental remediation.
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PubMed
高影响因子
BIOMACROMOLECULES
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2025
·
IF 5.4
Bingqing Lin,Pengfei Yang,Wei Liu,Zhiqiang Li,Zhao Wang,Yong Xiang,Qian Zhang,Xiaoran Hu
Water quality monitoring refers to multiple parameters, including flow rate, pH, and temperature. However, current individual underwater sensors have certain limitations in multiparameter measurements, and integrated sensors face dilemmas, such as large size and high power consumption. In the present work, a hydrogel sensor was prepared for water quality monitoring (HSWQM) based on a piezoelectric elastomer (PE). The PE is synthesized with a long flexible backbone and cross-linking sites, providing it with a low elastic modulus and high piezoelectricity to realize stress monitoring. PE was blended with sodium alginate (SA) to make a flexible piezoelectric hydrogel (FPH), and its high swelling capacity was utilized to absorb carbon quantum dots (CQDs), thus responding to changes in pH. Further integration with a thermally sensitive alloy membrane and a Near Field Communication (NFC) module enabled real-time and synchronous monitoring of flow rate, temperature, and pH.
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ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yan Li,Defa Huang,Wenjiang Shen
Supercapacitors based on MnO 2 /CB/C nanocomposites films are prepared by direct electrophoretic deposition (EPD) process on nickel plates in an aqueous solution containing of MnO 2 nanoparticles , carbon black (CB) and sodium alginate (SA), followed by carbonization of SA to carbon layer . The nanocomposites of MnO 2 /CB/C films are prepared from different electrolytic solutions with mass ratios of MnO 2 nanoparticles, CB and SA from 8: 1: 1 to 6: 2: 2. Same mass ratios of nanocomposites are prepared by traditional Doctoral Blade (DB) process for morphologies and performances comparisons, in which mixtures of MnO 2 nanoparticles, carbon black with polyvinylidene fluoride (PVDF) are used. From scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) images, the MnO 2 /CB/C shows a uniform aggregation of MnO 2 and carbon nanoparticles covered with carbon layers. In the case of the MnO 2 /CB/PVDF from DB process, the MnO 2 nanoparticles are separately clustered, and the clusters are adhered to CB together with PVDF. More uniform film and better contact of MnO 2 with CB by carbon layer can be obtained from EPD/Carbonization process. The electrochemical performances of MnO 2 /CB/C and MnO 2 /CB/PVDF nanocomposites in different mass ratios are compared by areal specific capacitances (C a ), charge transfer resistance of films and retention of capacitance after 1500 cycles of charge/discharge to test stability respectively. The nanocomposites of MnO 2 /CB/C show better areal specific capacitances and smaller charge transfer resistances at each ratio. The carbon layer coating on surface of MnO 2 nanoparticles can effectively delay the capacitance loss, which leads to 98% of capacitance after charge/discharge cycles, much better than retention of those from DB process (50%). The EPD/Carbonization is an easy way to make carbon layer on pseudo capacitive materials from sodium alginates , and the carbon layer can effectively improve the charge/discharge stability of supercapacitors.
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FOOD CHEMISTRY
·
2026
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IF 10.4
Elam Elnur,Wei Wang,Kiran Thakur,Wen-Ping Ma,Zhi-Jing Ni,Zhao-Jun Wei
A composite film was prepared using sodium alginate as the substrate, supplemented with nano-TiO₂ and antimicrobial agents consisting of pomegranate peel polyphenols and ginger essential oil at different ratios. The film was fabricated via cast-film method as a pomegranate peel polyphenol/ ginger essential oil/sodium alginate/nano-TiO₂ composite. Its properties were characterized, and the film's effects on grape storage quality indicators were evaluated. The results showed the P6 composite film exhibited optimal mechanical properties, with a tensile strength of 6.13 MPa and an elongation at break of 200.88%. Its soil degradation rate reached 10.74% after 15 d. It effectively suppressed quality loss in grapes and significantly reduced rot rates, while better maintaining hardness, ascorbic acid content, soluble solids content, and titratable acidity, thereby extending the grape storage life. This study demonstrates that the composite film extends fruit shelf life, reduces packaging costs for greater economic benefit, and minimizes packaging waste and plastic pollution, offering significant environmental advantages.
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高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Xin Ge,Hao Xiong,Chengzhe Niu,Mingyu Li,Huitao Yu,Lina Jia,Ruiguang Xing,Gaofei Pan,Yanan Li,Jinxiao Bao
The encapsulation of solid-liquid phase change materials (PCMs) provides good shape stability and mechanical strength for further applications in thermal management, which is an attractive topic in the development of materials for thermal energy storage. In this work, a novel and facile strategy was developed for the encapsulation of polyethylene glycol (PEG). Hydrogels containing sodium alginate (SA) and PEG were first prepared through the formation of hydrogen bonds or chelation with metal ions including Ca 2+ , Ce 3+ and La 3+ . Then, macroporous foams with a unique “bone-like” structure were synthesized via freeze-drying while PEG was encapsulated as “bone marrow” by SA. The foams exhibited varied microstructures with different preparation strategies. After mold pressing, the PCMs maintained excellent shape stability at temperatures much higher than the melting point of PEG. They provided high latent heat, reaching 167.26 J/g, and high relative latent heat efficiency. After 200 thermal cycles, the latent heat retention rate remained as high as 97.06 %. This study establishes a promising approach for the encapsulation of PEG as a shape-stable PCM. Furthermore, the heterogeneous structure of the foams synthesized in this work shows great potential for the development of novel functional materials.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 2
·1240
·
IF 5.6
Hang Yao,Xiaohui Yuan,Zhonglian Wu,Sumin Park,Wang Zhang,Hui Chong,Liwei Lin,Yuanzhe Piao
A gelatin/sodium alginate-based hydrogel microsphere has been fabricated after reaction condition optimization. Macrophages (RAW246.7) and adipose mesenchymal stem cells (ADSC) have been subsequently encapsulated in the microsphere in order to construct a 3D paracrine system for wound healing treatment. The synthesized microsphere displayed neglectable cytotoxicity toward both encapsulated cells until 10 days of incubation, indicating promising biocompatibility of the microsphere. A qRT-PCR and ELISA experiment revealed positive regulation of cytokines (Arg-1, IL-6, IL-8, IL-10, bFGF, HGF, VEGF, TLR-1, and CXCL13) expression regarding macrophage phenotype transformation and anti-inflammatory performance both inside the microsphere and in the microenvironment of established in vitro inflammatory model. Additionally, positive tendency of cytokine expression benefit wound healing was more pronounced in a fabricated 3D paracrine system than that of a 2D paracrine system. Furthermore, the 3D paracrine system exhibited more efficiently in the wound healing rate compared to the 2D paracrine system in an in vitro model. These results suggested the current paracrine system could be potentially used as a robust wound healing dressing.Keywords:wound healing dressing;paracrine system;biocompatibility;3D cell culture;natural polymer
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BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Zhiyong Qin,Kaiqiang Dong,Yidan Zhang,Yanling Jiang,Liuting Mo,Siyu Xiao
Rational design of adsorbed materials with three-dimensional (3D) hierarchical porous structure, sustainable, high adsorption capacity, and excellent selective is of great significance in practical applications. Herein, a novel aerogel adsorbed material with 3D hierarchical porous architecture was fabricated by employing naturally abundant sodium alginate (SA)/gellan gum (GG) as basic construction blocks to achieve sustainability as well as applying polyethyleneimine (PEI) as functional material for highly efficient and selective capture of Congo red (CR). The aerogel sorbent exhibited strong microstructure, numerous active adsorption sites and being ultralight. The resulting aerogel adsorbent showed high adsorption capacity (3017.23 mg/g) toward CR, exceedingly most previously reported sorbents. Furthermore, the aerogel adsorbent was accompanied by outstanding selectivity for CR in four binary dye systems. Meanwhile, after 3 cycles, the adsorption capacity decreased by 14.8 %, but still maintained the adsorption capacity of 559.79 mg/g. Therefore, excellent adsorption performance, and superb selectivity prefigures its great prospects for wastewater purification.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Junhong Gu,Zhi Liu,Aiyuan Jia,Yiqi Wang,Ningning Li,Zhisheng Liu,Yangxue Li,Hongxing Zhang
Due to the extensive usage of tetracyclines and fluoroquinolones for disease control, their residuals usually coexist in wastewater and seriously affect human health and the entire ecosystem. To mitigate this problem, developing efficient and recyclable absorbent has been urgently required to be put on the agenda. In this research, Ga-based MOGs (GMOGs) were synthesized to remove chlortetracycline hydrochloride (CTC) and ciprofloxacin hydrochloride (CIP) in aqueous solution, followed by incorporating GMOGs into low-cost sodium alginate (SA) matrix to gain GMOG/SA beads with enhanced adsorption property, fine recycling performance and stable reusability. In single system (S-system), the adsorption behaviors of CTC/CIP by GMOGs and GMOG/SA beads including key operating factors, kinetics, isotherms and practicability were investigated systematically, and the maximum adsorption capacities for CTC/CIP by GMOGs and GMOG/SA beads achieved 406.50/158.23 mg g −1 and 1085.19/862.07 mg g −1 , respectively. Furthermore, the proposed adsorption mechanisms were discussed. In binary system (B-system), regardless of suppressed co-adsorption behaviors of CTC/CIP by GMOGs and GMOG/SA beads arising from the competitive effect between CTC and CIP, their adsorption capacities still reached 207.90/126.90 mg g −1 and 588.24/571.42 mg g −1 , respectively. Moreover, the value of industrial application was evaluated by testing the adsorption performance of GMOG/SA beads in bead columns and real water. This work provides a potential practicable, effective and recycled exploration of GMOG/SA beads for remediating the CTC and CIP co-contaminated wastewater.
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