INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.5
Xiaoqiang Chen,Yipei Liu,Enze Zhu,Yue Wu,Kun Chen,Zhusheng Feng,Mingyu Liu,Na Peng
This study introduces a multifunctional sponge (CS/EGO-EK) designed for rapid hemostasis and treatment of infected wounds. By integrating graphene oxide-grafted engineered kaolin nanotubes (EGO-EK) into a chitosan matrix, the composite demonstrated enhanced pore interconnectivity, mechanical strength, and fluid absorption. The EGO-EK component preserved biocompatibility while promoting platelet activation. In vitro , CS/EGO-EK exhibited approximately 2.1 times higher blood adsorption compared to pure chitosan, with significantly improved platelet adhesion. Antibacterial assays revealed over 99% inhibition of E. coli and S. aureus , which was further amplified by near-infrared (NIR) irradiation via photothermal synergy. In vivo , CS/EGO-EK reduced blood loss by 50–70% and shortened hemostasis time to approximately 40–60% of the control in rat models of tail, liver, and femoral artery injuries. In full-thickness infected wounds, CS/EGO-EK + NIR achieved over 97% wound closure and more than 95% bacterial reduction by day 14, along with enhanced epithelial regeneration and collagen deposition. These results underscore CS/EGO-EK as a promising platform that integrates structural optimization, kaolin-induced coagulation, and NIR-enhanced antibacterial effects for effective emergency bleeding control and infected wound healing.
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RSC Advances
·
2026
·Vol. 16
·期 2
·1697-1713
·
IF 4.6
Abdelazeem S. Eltaweil,Nouf Al Harby,Mervette El Batouti,Eman M. Abd El-Monaem
In this investigation, a good adsorbent was created by combining kaolin, β-cyclodextrin, and sodium lauryl sulfate-functionalized biochar, resulting in a new Kaol/SLS-BC/β-CD composite. Assorted analyses were used to characterize the chemical/physical properties of the Kaol/SLS-BC/β-CD. The adsorption capability of the Kaol/SLS-BC/β-CD was evaluated, using an experimental adsorption batch study of o-nitrophenol (o-NP). The experimental batch experiments showed that o-NP removal of 100% was achieved at room temperature after 180 minutes with pH = 3, Kaol/SLS-BC/β-CD dose = 10 mg, and o-NP concentration = 50 mg L−1. Kinetic and isotherm analyses of the experimental data implied that the Freundlich isotherm model and the pseudo-second-order kinetic model were obeyed for the o-NP adsorption reaction. Surprisingly, the maximal adsorption capacity of Kaol/SLS-BC/β-CD towards o-NP, calculated from Langmuir analysis, was 588.24 mg g−1. The optimization of o-NP adsorption onto Kaol/SLS-BC/β-CD was investigated using response surface methodology (RSM) based on a Box–Behnken design (BBD) with three independent variables: initial o-NP concentration, adsorbent dosage, and contact time. The quadratic response surface model was validated through analysis of variance (ANOVA). The reduced quadratic model demonstrated good agreement between the predicted and experimental results. Thus, the validated model can be reliably applied to predict the optimal conditions for o-NP adsorption onto Kaol/SLS-BC/β-CD. The mechanistic study of the o-NP adsorption onto Kaol/SLS-BC/β-CD clarified that the process may occur via Lewis acid–base, pore-filling, coordination bond, hydrogen bond, and pi–pi interactions. Notably, the cycling test indicated that the Kaol/SLS-BC/β-CD could be reused for six adsorption cycles of o-NP with promising efficacy.
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ANALYTICAL CHEMISTRY
·
2026
·Vol. 98
·期 34
·24984-24992
·
IF 7.3
Chen Bozhou,Wu Yu,Zhang Fang,Yang Guan,Chen Sheng
Rapid on-site detection of bacterial contamination remains
an urgent
need in public health and environmental monitoring. Herein, we report
a one-step, label-free colorimetric sensor for broad-spectrum bacterial
detection based on a competitive electrostatic mechanism. Cationic
poly- l -lysine (PLL) induces the aggregation of anionic, citrate-capped
gold nanoparticles (AuNPs), resulting in a distinct red-to-blue color
change. In the presence of bacteria, their negatively charged surfaces
adsorb PLL, thereby inhibiting AuNP aggregation and maintaining the
red color of the dispersion. This strategy enables the visual detection
of various Gram-positive and Gram-negative bacteria within 10 min.
Using Escherichia coli ( E. coli ) as a model analyte, the assay reached a
detection limit of 720 CFU/mL under the optimized conditions (5 μg/mL
PLL, 3 min incubation, 20 mM phosphate buffer at pH 7.5) and exhibited
a wide detection range from 10 2 to 10 7 CFU/mL
( R 2 > 0.99). The assay also performed
reliably in spiked tap water and drinking water samples, with recoveries
of 82–96% and CVs below 10%, demonstrating its potential as
a rapid, low-cost screening tool for bacterial contamination in low-matrix
water samples.
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JOURNAL OF HYDROLOGY
·
2023
·
IF 6.4
Huan Wang,Jia Xin,Xilai Zheng,Yunhai Fang,Mingmin Zhao,Tianyuan Zheng
Artificial recharge of groundwater is an effective technology for solving the shortage of water resources. The clogging of porous media is a bottleneck that limits the application of this technology. In this study, percolation experiments in sand columns were conducted to investigate the influence of different types of biofilms on the deposition of suspended particles and clogging evolution during artificial recharge. A unique aspect of this study is the consideration of biofilms coated on porous media when the clogging mechanisms of suspended particles in porous media are explored. At the end of the recharge process, the relative hydraulic conductivity ( K’ ) of the porous media in descending order was Pseudomonas aeruginosa experimental group (PA) > Bacillus subtilis experimental group (BS) > mixed microbial consortium experimental group (MC) > suspended particle only group (SP). The suspended particles in SP- moved more deeply into the sand column than those in BS, PA, and MC. Electron microscopy, high-throughput sequencing, and confocal laser scanning microscopy were used to identify the mechanisms governing clogging evolution under the influence of biofilm existence. The presence of a biofilm not only alters the surface charge and physical roughness of the porous media, but also affects the electrostatic interaction between the porous media and suspended particles. Biofilms combine tightly with suspended particles by binding and adhesion, which can form tight biofilm-particle aggregations. Compared with deposition of particle-only in SP, the biofilm-particle aggregations on the surface of the porous media are more firm. The biofilm coated on the surface of porous media occupied the pore vacancy and narrowed the void space compared with that in clean sand, which induced physical straining. As the thickness of biofilm coated on the sand surface increased, the more suspended particles were deposited on the sand surface in PA. These findings provide insights into clogging under the influence of biofilms and have implications for future field-based artificial recharge.
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ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Qian He,Huixia Chen,Haiyan Tang,Jiyuan Sun,Hongbin Xu,You Zhang
The lightweight aggregate ceramsite (LAC) was prepared from by-product sulfate salt slag (BPSS) of high-salt organic wastewater with fly ash. The BPSS fixation rate, leaching toxicity, morphological structures and potential environmental risks of heavy metals in LAC were investigated. BPSS can be fixed in LAC when the mass ratio of Fly ash: Kaolin: clay was 7:1:2, the addition of BPSS was 28%, the heating rate was 8°C min−1, and the calcination temperature was 1100°C. The characteristics of the LAC met the requirements for Chinese lightweight aggregate standards (GB/T17431.2-2010). The Total Organic Carbon (TOC) content of the aqueous leaching liquor in LAC was less than 0.5 mg·L−1. And the fixation rate of heavy metal was more than 99%, which meets the requirements of GB 5085.3-2007. The BPSS immobilization mechanisms were mainly related to the formation of new crystal phases, including Leucite (KAlSi2O6), Albite (Na2O·Al2O3·6SiO2), Potash Feldspar (K2O·Al2O3·6SiO2), Jadeite (NaAlSi2O6), Hauyne ([Na,Ca]8[Si,Al]12O24[SO4]2), Nosean (Na8Al6Si6O24SO4), and Sodalite (Na8Al6Si6O24[MnO4]2) by incorporation of heavy metals in high-temperature curing reaction. This work provides an effective method for the harmless treatment and recycling of by-product salt residues from high-salt organic wastewater.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yijie Wang,Zhixin Chen,Liming Hu
Specific surface area is an important property of porous materials and a crucial index in multiple disciplines, which is mainly measured using nitrogen isotherms and the Brunauer–Emmett-Teller (BET) equation. The BET surface area is remarkably higher than the geometric surface area, which is defined as the surface area of the crystal geometry structure. However, many studies directly use the BET surface area as the geometric surface area. We proposed a simple, general, and accurate method that only needs the nitrogen adsorption isotherm as the input to calculate the geometric surface area of mesoporous materials. The proposed method considers the adsorptive potential influences and the physical state of adsorbed nitrogen in estimating the surface area. We utilized 18 isotherms generated by molecular simulations and actual experiments to cover a wide range of materials, including minerals, catalysts, and carbon-based tubes, and validate the effectiveness of the proposed method. Our results showed that the surface area determined by the proposed method is almost identical to the referenced geometric area. The surface area obtained by the proposed method can be typically considered a geometric surface area.
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APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Yao Xiao,Zhenchun Xu,Chuansheng Wang,Huiguang Bian
In order to realize the high value-added utilization of natural clay materials in natural rubber composites , an environment-friendly animal glycerol potassium salt was introduced to modify kaolin, and the natural rubber with excellent performance were prepared by high-energy ball milling combined with gas-phase spray drying technology . The impact of the ball milling reduced the particle size and increased the specific surface area of kaolin, promoting the chemical modification of kaolin by potassium oleate. The gas-phase spray technology effectively broke the filler aggregates, and the high-temperature roller realized the instantaneous drying, reducing the oxidation and fracture of the rubber molecular chains . In this paper, the gas barrier properties , mechanical properties, anti-aging properties, dynamic mechanical properties and Payne effect of the composites were investigated. The FTIR , XPS and interfacial contact angle demonstrated the existence of a stable chemical bonding in the process of potassium oleate-modified kaolin, and the hydrophilicity of kaolin was reduced. Kaolin was uniformly and finely dispersed in the rubber matrix by spray drying technology. Compared with the traditional dry mixing, the composites prepared by the technology improved the gas barrier properties , processing properties, comprehensive mechanical properties, and the aging coefficient increased by 23.1%, and had excellent wet skid resistance and rolling resistance.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hao Wang,Wenxin Bao,Muhammad Tariq Sarwar,Luyuan Tian,Aidong Tang,Huaming Yang
Local geometric configurations of metal cations in inorganic enzyme mimics determine their catalytic behaviors, while their optimization remains challenging. Herein, kaolinite, a naturally layered clay mineral, achieves the optimization of cationic geometric configuration in manganese ferrite. We demonstrate that the exfoliated kaolinite induces the formation of defective manganese ferrite and makes more iron cations fill into the octahedral sites, significantly enhancing the multiple enzyme-mimicking activities. The steady-state kinetic assay results show that the catalytic constant of composites toward 3,3′,5,5′-tetramethylbenzidine (TMB) and H2O2 are more than 7.4- and 5.7-fold higher than manganese ferrite, respectively. Furthermore, density functional theory (DFT) calculations reveal that the outstanding enzyme-mimicking activity of composites is attributed to the optimized iron cation geometry configuration, which has a higher affinity and activation ability toward H2O2 and lowers the energy barrier of key intermediate formation. As a proof of concept, the novel structure with multiple enzyme-mimicking activities amplifies the colorimetric signal, realizing the ultrasensitive visual detection of disease marker acid phosphatase (ACP), with a detection limit of 0.25 mU/mL. Our findings provide a novel strategy for the rational design of enzyme mimics and an in-depth investigation of their enzyme-mimicking properties.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 30
·e54103
·
IF 3
Zhenchun Xu,Yao Xiao,Yukun Zhou,Yufei Hong,Qingxiang Lai,Chuansheng Wang,Huiguang Bian,Wei Li
A combination of plasma-foaming double dispersion method, flash drying technology, and potassium oleate (PO), a plasma- and environmentally-friendly foaming agent, were used to modify kaolin. The use of high-energy plasma disrupts the stacking agglomeration formed between kaolinite lamellae, increases the contact area between the lamellae, and PO reduces the polarity of kaolinite to realize the effective surface modification of kaolinite. PO decreases the polarity of kaolin and weakens the strength of the interfacial bonds formed between kaolin and rubber. Modified kaolin and natural latex are deposited on the surface of high-temperature rollers for instant drying, and a decrease in the contents of non-rubber components, such as proteins and phospholipids accompanies the progress of the rapid drying process. Thus, the gas barrier performance of the composite was higher than that of the traditional dry blend by 42.9%. The tensile strength of the prepared composite was higher than that of the traditional blend by 9%, and the aging coefficient of the fabricated composite was higher than that of the traditional blend by 45.5%. Herein, a new environmentally friendly and energy-saving method has been proposed for the fabrication of natural rubber composites characterized by excellent gas-tightness using natural mineral resources.
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Water
·
2023
·Vol. 15
·期 9
·1680
·
IF 3.4
Yuxin Jiang,Xihua Cao,Fang Li,Xiuxian Song
Antibiotics have been identified as emerging pollutants, and they increasingly threaten the safety of mariculture; thus, effective treatment methods are urgently needed. In this study, Fe(II)-peroxymonosulfate-modified clay (Fe-PMS-MC), an effective mineral complex for harmful algal bloom control, was tested for sulfamethoxazole (SMX) removal from seawater. The results showed that SMX removal efficiency increased gradually from 42.3% to 100% in seawater in 6 h as the Fe-PMS-MC dose increased from 0.1 g/L to 1.0 g/L; this removal was more efficient than that in freshwater. Both an increase in temperature and the addition of inorganic anions such as Cl−, HCO3−, and SO42−improved the SMX removal efficiency; in contrast, there was no noticeable influence of a pH change from 3.0 to 9.0 or ofHeterosigma akashiwobiomass addition from 103cells/mL to 105cells/mL. Oxidation was the main mechanism for the removal of SMX by Fe-PMS-MC treatment, and the mechanisms included radical oxidation and non-radical oxidation. PMS was the key component in Fe-PMS-MC for the production of radicals, which increased with temperature. Similarly, both radical oxidation and non-radical oxidation increased when PMS was attacked by Cl−, HCO3−, and SO42−in seawater.
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International Journal of Environmental Research and Public Health
·
2023
·Vol. 20
·期 4
·2793
·
IF 4.614
Jie He,Qixuan Song,Jian He
In order to address the growing problem of water pollution caused by the excessive discharge of contaminants and provide a better aquatic ecosystem for the public, increasing attention has been paid to the harmlessness and efficiency of coagulation. In this study, polyaluminum lanthanum silicate (PALS) was synthesized through co-polymerization as a novel coagulant to treat wastewater. FTIR, XRD, and SEM were used to analyze the morphology and structure of the material, which further confirmed that the PALS was successfully synthesized. The results indicated that PALS had a great performance in the treatment of a kaolin–humic acid suspension under the optimal synthesis conditions with Al/Si = 3, La/Si = 0.1, and basicity = 0.7. Compared with conventional coagulants, PALS exhibited a better performance at a low coagulant dose and could achieve a good removal effect for an ultraviolet wavelength less than 254 nm (UV254) (83.87%), residual turbidity (0.49 NTU), and dissolved organic carbon (DOC) (69.57%) at the optimal conditions. Additionally, the PALS showed a better effect on phosphate removal than other coagulants did, where the removal efficiency could reach 99.60%. Charge neutralization and adsorption bridging were the potential wastewater treatment mechanisms employed by the PALS, which showed varied contributions under different pH levels. The results indicated that PALS can be a promising coagulant in water treatment.Keywords:coagulant;water treatment;phosphate adsorption;polymer bridging
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Biofuels Bioproducts & Biorefining-Biofpr
·
2023
·Vol. 17
·期 3
·592-601
·
IF 3.9
Liangliang Zhang,Man Xu,Qinhao Guan,Jianchun Jiang,Kang Sun,Emmanuel Manirafasha
Tannin is a chemical compound found in plants such as tea, with yellow or brown as a characteristic color. Tannin is present in any plant species’ wood, stems, barks, leaves, roots, and fruits. However, the tannin contents in those plants are not the same and plants rich in tannin are the most used raw material for industrial-level tannin extraction, such as chestnut. The central purpose of this article was to identify the tannin content of vegetables. In this study, tannins were extracted from 72 plants in China. The contents and purities of tannins, non-tannins and insoluble substances in those studied plants were determined. A gravimetric approach, using hider powder as a precipitate to bind tannins, has been developed to quantify total tannins in plants. The results showed that high contents of tannins (>20%) were found in Pltycarya strobilacea fruit, Quercus acutissima shell, Quercus variabilis shell, Acacia mearnsii bark, Albizia kalkora bark, Camellia oleifera wood, Rosa cymosa root, Rosa laevigata root, Rhus chinensis gallnut, Bruguiera sexangular bark, Kandelia candel bark, Ceriops tagal bark, Lumnitzera racemose bark and Dioscorea cirrhosa tuber. The purity of tannins was more than 70% in some plants: Larix gmelimi bark, Causuarina equisetifolia bark, P. strobilacea fruit, Castanopsis tibetana wood, Quercus aliena shell, Quercus chenii shell and bark, A. mearnsii bark, A. kalkora bark, Bruguiera gymnorrhiza bark, C. tagal bark, K. candel bark and D. cirrhosa tubers . These plants are excellent resources for vegetable tannins in China. © 2023 Society of Industrial Chemistry and John Wiley & Sons Ltd.
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