Journal of Water Process Engineering
·
2023
·
IF 7
Mingxuan Wu,Manyu Zhao,Xiao Li,Jiatong Liang,Yingwen Xue
In this study, a stable gel sphere was successfully prepared by crosslinking sodium alginate(SA) with sodium carboxymethyl cellulose(CMC) through La and modified by MMT for removing tetracycline hydrochloride (TCH). The obtained materials have been comprehensively characterized using SEM, FTIR, XRD and XPS. The results of batch experiments showed that La@SA/CMC-MMT-0.5 had a high adsorption capacity of TCH, and its maximum adsorption capacity was up to 420.95 mg/g. The adsorption process followed a pseudo-second-order kinetic model and the Freundlich isotherm model. The removal of TCH was a combined process involving both chemisorption and physical adsorption. Hydrogen-bond and complexation played a primary role in removing process, while the role of static electricity was more limited. The MMT modification not only enhanced adsorption capacity of TCH but also improved the thermal stability of the material by creating a temperature barrier and promoting hydrogen-bond. La substitution of metal ions in MMT and electrostatic attraction by MMT-surface negative charges contributed to reducing La-release. In application experiments, the La@SA/CMC-MMT-0.5 showed a high adsorption capacity, strong anti-disturbance performance, and good reusability. Therefore, La@SA/CMC-MMT-0.5 holds great potential for the effective adsorption of TCH in aqueous environments.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 8
·11874-11882
·
IF 4.223
Xiang
Minghui,Lu Zhen,You Ziyin,Wang Xuechen,Huang Maofang,Xu Weixiong,Li Hui
In situ flushing through surfactant-enhanced aquifer remediation (SEAR) technology has long been recognized as a promising technique for NAPL removal from contaminated aquifers. However, there have been few studies on the choice of surfactants. In this work, the interaction quantitative model between resonance light scattering intensity and the concentration of binary surfactant mixtures NP-10+SDBS and NP-10+CTAB was established, and the mechanism of binary surfactant interaction was explored through the model by the resonance light scattering method. The relationship between the model constants and NAPL solubilization was also investigated to better address the application of surfactants in practical NAPL-contaminated site remediation. The critical micelle concentrations (CMCs) of nonylphenol ethoxylate (NP-10), dodecyl benzene sulfonate (SDBS), hexadecyl trimethyl ammonium bromide (CTAB), and the binary surfactant mixtures were measured by resonance light scattering (RLS), which were consistent with those obtained from surface tension measurements. In all cases, the RLS signals exhibited similar variations with surfactant concentration. A quantitative calculation model based on the RLS measurement data was established, and the binding constants K NP-10+SDBS and K NP-10+CTAB were calculated to be 0.66 and 1.51 L·mmol −1 , respectively, according to the equilibrium equations. The results showed that the binding constants have a significant positive correlation with NAPL solubilization.
研究领域:
环境科学
·
化学
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42879-42890
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IF 7.8
Li Jian,Zhu Hongtao,Tang Zhaoyu,Li Junchun,Li Zhenyu,Yue Yu,Chang Yajing,Zhong Honghai,Tong Guoqing,Jiang Yang
Materials integrating electromagnetic interference (EMI) shielding and infrared (IR) stealth possess great application potential but face obstacles in large-scale production. Herein, MXene/sodium carboxymethyl cellulose (CMC-Na) composite ink is synthesized via facile, scalable vacuum ball milling. CMC-Na chains adhere to MXene through intermolecular hydrogen bonds; electrostatic repulsion restrains nanosheet stacking, while the coating hinders MXene oxidation. The ink exhibits outstanding machinability and can form uniform films on various substrates via screen printing or coating. At a MXene/CMC-Na mass ratio of 4:1, the film achieves balanced performance: a tensile strength of 82.84 MPa, an elongation at break of 2.67%, a toughness of 1.58 MJ·m – 3 , an EMI shielding effectiveness of 33 dB, and a specific shielding effectiveness of 37,260 dB·cm 2 ·g –1 . Low IR emissivities of 19.56% (3–5 μm) and 13.65% (8–14 μm) reduce the surface radiant temperature to 69 ° C under 150 ° C heating. Its layered structure combines surface and internal multiple reflections to reconcile EMI shielding and IR stealth. This low-cost scalable strategy supports the development of integrated shielding-stealth wearable electronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shengtao Zhou,Jun Xu,Ao Li,Zhaohui Zhang,Bin Wang,Wei Zhang,Kefu Chen
Non-nanoscale strategy enables high-performance flexible humidity sensing. • Synergistic CMC-MXene coupling amplifies humidity-induced transport response. • Ultrawide-range (11–97% RH) detection with a high response of 89.5%. • Excellent temperature stability, bending durability, and biodegradability. Flexible humidity sensors for wearable health monitoring and environmental sensing require simultaneously high sensitivity, operational stability, and environmental sustainability. However, most high-performance devices still rely on non-degradable polymers or elaborate nanostructured bio-based architectures. Here, we report a biodegradable resistive humidity sensor based on a vacuum-filtrated carboxymethyl cellulose (CMC)/MXene composite membrane. CMC provides abundant hydrophilic-OH and -COOH for efficient moisture adsorption, while MXene forms a percolated conductive network. Humidity-dependent XRD shifts indicate tunable MXene interlayer spacing within the CMC matrix, which modulates intersheet contacts and thus the effective conductive pathways, leading to an amplifies electrical response. The optimized sensor exhibits stable and highly reproducible responses over 11–97% relative humidity (RH), achieving a maximum humidity response value (-ΔI/I₀) of 89.5% at 97% RH, with a response/recovery time of 131/340 s. The device maintains performance underrepeated bending (100 cycles), long-term operation (10 days), and temperature variation. Importantly, the membrane shows rapid disintegration in soil within 30 days, offering a promising route toward high-performance yet sustainable flexible humidity sensing without nanocellulose fibrillation or complex device architectures. Download: Download high-res image (180KB) Download: Download full-size image
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Fan Zhang,Miaomiao Zhao,Xiaoyu Jia,Chen Li,Degang Ma
Activated carbon (AC) is considered to be an excellent adsorbent due to its high specific surface area and various functional groups. AC powders are available in mesh sizes ranging from 100 to 325. Its particle size prevent its separation from the soil. Therefore, when AC powder is applied to Cd-contaminated soil, it only reduces the bioavailability of Cd and Cd is not necessarily removed but semi-immobilized. Recovery of adsorbent materials from the soil is therefore a preferred soil remediation method. In order to achieve the separation of Cd from soil and the recovery and reuse of AC, a batch of phenolic resin(PR) -carboxymethyl cellulose(CMC) -activated carbon (AC) composite (PCC-800) with uniform particle diameter (Diameter 0.8mm) and high compressive strength was prepared. PCC-800 composites were made of PR/CMC/AC calcined at 800 °C in a certain ratio. The Barrett-Joyner-Halender results showed that the PCC-800 spheres own a mesoporous structure. The compressive strength of PCC-800 pellets was 20.6 N. After first adsorption cycle, total Cd in the soil decreased by 52.18% while bioavailable Cd decreased to 25.68% of the original soil. After three cycles, the recovery rates of PCC-800 were 90.37% and the adsorption regeneration was 72.73%. The PCC-800 immobilized Cd by adsorption, precipitation and complexation reaction. This study demonstrates the potential for developing adsorbents that are both easily separable from soil and highly effective in adsorption.
研究领域:
环境科学
·
土壤修复
·
材料科学
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LANGMUIR
·
2025
·
IF 3.9
Wenqian Xiao,Qisong Hu,Wenxi Li,Hongsi Yu,Ziyi Yan,Congyan Xia,Yuekun Li,Jifan Wang,Xiaoling Yang,Bo Li,Xiaoling Liao
Oil–water separation remains a critical environmental challenge for treating industrial effluents and marine oil spills. This study presents a novel SiO2/CMC-Fe3+ (SCF) composite mesh fabricated through an environmentally friendly two-step approach: hydrophilic silicon dioxide (SiO2) nanoparticle deposition on copper mesh, followed by CMC-Fe3+ hydrogel surface modification. The synergistic interactions among SiO2 nanoparticles, CMC-Fe3+ hydrogel, and copper substrate through hydrogen bonding and metal chelation create a hierarchical structure, exhibiting superhydrophilicity and underwater superoleophobicity. Under gravity-driven conditions, the SCF mesh achieves high performance with >99% separation efficiency and up to 4.019 × 104 L·m–2·h–1 water flux across diverse oil types. The mesh demonstrates excellent durability, maintaining >99.5% efficiency after 60 cycles and exhibiting stability under harsh conditions, including extreme pH, high salinity, and temperature variations, with separation efficiencies above 98% after extended testing. The combination of high performance, enhanced stability, cost-effectiveness, and environmental compatibility positions the SCF mesh as a promising solution for offshore oil spill management, underwater oil treatment, and industrial oily wastewater purification.
研究领域:
环境科学
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材料科学
·
化学工程
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zhuqian Xiao,Qian Zhao,Qin Li,Yurui Wang,Huilin Zheng,Hongpeng Wang,Jun Huang,Jianwei Mao
The current manufacture of (carboxymethyl)cellulose (CMC) requires a large amount of solvents, severely resulting in environmental impacts and a laborious separation process. Herein, a “green” synthetic route employing a mechanochemistry strategy was addressed to prepare CMC promoted by minute surface-confined water. The mechanical forces (shear and strain) from ball collisions facilitated the formation of disordered regions, promoting the water-holding capacity of cellulose. Together, water molecules permeated the impact structure and were locked by surface hydroxyls, intensifying the chemical accessibility. The resultant CMC possessed a wide degree of substitution within 0.38–1.03 and a maximum yield of 46.1% under optimal mechanochemical conditions. Density functional theory revealed that Gibb’s free energy (ΔGTS) of hydroxyl activation was approximately −1.73 eV on the surface of dry cellulose. In comparison, ΔGTS was reduced to −3.37 eV upon intervention of water. The reactivity sensitivity of hydroxyls was C2 > C6 > C3 on the surface of highly hydrated cellulose. The high concentration (1200 μg/mL) of CMC was not significantly toxic to HepG2 cells (apoptosis rate of less than 4.0%), demonstrating the excellent biocompatibility of CMC prepared by this strategy. This mechanochemical method opened a safe and environmentally friendly avenue to produce CMC without sacrificing excess reagents.
研究领域:
材料科学
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化学工程
·
环境科学
·
生物技术
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NANO
·
2021
·
IF 1.556
Yuntian Wan,Xue Lin,Zhongshuai Chang,Xiaohui Dai,Jiangdong Dai
Currently, with the increasingly serious pollution problem of oily wastewater, it is urgent to develop advanced materials and methods. In this work, a Fe(III)-CMC@Ni(OH) 2 @Ni composite foam with superhydrophilic and underwater superoleophobicity was fabricated by an in situ growth of flower-like Ni(OH) 2 nanoparticles and chelated assembly of Fe(III)-CMC nanohydrogel via a layer-by-layer self assembly using Fe 3 + ion and carboxymethyl cellulose (CMC). The composite foam could separate various oil/water mixtures and exhibited excellent efficiency over 99%. This foam possessed ultrahigh water flux (220000 L m − 2 h − 1 ) and better resistant to penetration pressure (1.3 kPa). After 30 cycles, the oil–water separation performance reduced only 0.5%, but the foam structure was still stable that guarantees a better lifetime. Besides, this composite foam showed anti-fouling, unique durability and excellent corrosion resistance performance. Taking into account all good properties, Fe(III)-CMC@Ni(OH) 2 @Ni composite foam was expected to be a potential candidate for responding to all kinds of complex oily wastewater conditions.
研究领域:
材料科学
·
环境科学
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Journal of Central South University
·
2024
·Vol. 31
·期 4
·1163-1177
·
IF 3.7
Liu Hong-yu,Lyu Hua-gang,Zhang Wen,Jiang Jun,Li Xiao-hong,Xue Sheng-guo
To improve the remediation and antioxygenic properties of ferrous sulfide (FeS) nanomaterials toward heavy metals is the focus of current research. This study employed a combination of sodium carboxymethylcellulose (CMC) and sodium dodecyl benzene sulfonate (SDBS) for the modification of FeS nanomaterials supported by porous silicon (SiO 2 /FeS) to serves as an efficient amendment for cadmium pollution. The optimized slurry with the mass ratio of CMC/SDBS to be 1:3 showed enhanced dispersion and antioxidant effects on SiO 2 /FeS (the mass ratio of surfactant to FeS was 1:1). This formulation exhibited the smallest particle size ( D 50 = 0.66 µm) and the highest absolute Zeta potential values exceeding 30 mV. Also, the obtained products demonstrated effective remediation of cadmium-contaminated solutions, with Cd(II) primarily forming stable CdS and CdSO 4 products through ion exchange and chemical precipitation. The adsorption capacity of SiO 2 /FeS-CMC/SDBS 1:3 for cadmium in air and nitrogen was remained during 30 d, reaching about 158 mg/g. Notably, under low concentration Cd contamination, the adsorption capacity of SiO 2 /FeS-CMC/SDBS 1:3 exceeded that of SiO 2 /FeS-CMC and SiO 2 /FeS-SDBS without acidification risk. In summary, this research highlights the improved remediation and antioxygenic properties achieved through CMC and SDBS co-modification of SiO 2 /FeS, providing a new amendment for Cd remediation.
研究领域:
环境科学
·
材料科学
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yang Wang,Jingyun Huang,Jianguo Lu,Bin Lu,Zhizhen Ye
The shuttling effect of soluble polysulfide in electrolyte has been the major obstacle resulting in the poor cycling stability of Li–S battery. The ultrathin ZrB 2 /graphene oxide/carboxymethocel (ZrB 2 /GO/CMC) layer coated onto cathode via simple doctor blade method has been developed as the effective polysulfide shuttling barrier. Owing to typical 2D scaffold and abundant functional oxygen groups，the GO can provide physical defender as well as chemical trap against polysulfide shuttling. The introduction of conductive ZrB 2 nanoparticles in the hybrid layer can not only improve the conductivity of hybrid layer dramatically reducing electrochemical polarization of Li–S battery without adding other conductive agent but also further form chemical shield by chemisorption which is firstly confirmed by experimental and theoretical calculations. Combining these merits, the ultrathin ZrB 2 /GO/CMC hybrid layer combining with CNT@S hybrid cathode enables the Li–S battery to achieve good rate performance (769 mAh g −1 at a rate of 2 C) and stable cycling capability (with a low capacity decay rate of 0.098% during 300 cycles at 1 C). Specifically, the Li–S battery shows the potential of practical application, with high areal S loading of 5.1 mg cm −2 , delivering the capacity near-commercial lithium-ion battery.
研究领域:
材料科学
·
电化学
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POLYMER
·
2026
·
IF 5.1
Haiwei Wu,Liqing Du,Yunhao Liu,Chuang Zhou,Zuyu He,Chao Wang
The prevention of wound infection remains a critical area of research in the clinical management of diabetic wounds. Antibacterial hydrogel possesses the ability to present bacterial infections and promote faster wound healing. Here, gelatin (Gel) modified with phenylboronic acid (PBA) and carbo-di-hydrazide (CDH), was combined with oxidized carboxymethyl cellulose (OCMC) and polyvinyl alcohol (PVA) to constructed a multifunctional composite hydrogel with antibacterial drug, Imidazolium Chloride (Im-Cl). This hydrogel integrates injectability, self-healing properties, pH/glucose dual stimulus-responsive characteristics, and tissue adhesion, demonstrating favorable mechanical strength, biodegradability, and optimal biocompatibility. Notably, in vitro and in vivo experiments demonstrated that the PVA/PBA-Gel-CDH/OCMC@Im-Cl hydrogel could effectively killed bacterial, enhanced formation of new skin tissue, improved collagen distributions and accelerated wound healing. Collectively, this novel hydrogel provides a promising strategy for the treatment of infected diabetic wounds in clinical application.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 20
·1157
·
IF 3.5
Zhou Qihua,Wang Chenyang,Xu Simin,Duan Ziyi,Fu Tiantian,Ding Zhonghai,Li Na
Pomegranate peel, a by-product of pomegranate fruit processing, is frequently discarded in substantial quantities. This agricultural waste contains an exceptionally high concentration of natural polyphenols, distinguished by abundant hydroxyl groups possessing dual hydrogen-bond donating and accepting capabilities. However, research on the fabrication of hydrogels from pomegranate peel polyphenols (PPP) for organic dye removal applications remains limited. In this research, polyvinyl alcohol/sodium carboxymethyl cellulose (PVA/CMC) hydrogel was first synthesized through freeze–thaw cycles, and subsequently soaked in an aqueous PPP solution to fabricate the PVA/CMC/PPP composite hydrogel. We employed Fourier transform infrared spectrometer, scanning electron microscope, X-ray photoelectron spectroscopy, and simultaneous thermal analyzer for hydrogel characterization. Our findings revealed a porous structure in the hydrogel, with PPP immersion enhancing its pore configuration and thermal stability. Swelling tests further revealed that PPP reduced the degree of hydrogel swelling. The combined action of PPP and the PVA/CMC hydrogel augmented the adsorption capacity for methylene blue (MB). The adsorption of MB conformed to the Freundlich isotherm model, and its kinetic behavior aligned more closely with the pseudo-second-order model. The PVA/CMC/PPP hydrogel preserved superior MB removal capability even after five cycling operations. Thus, the formulated PVA/CMC/PPP hydrogel holds promise as a promising candidate for organic dye extraction from water.
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