Desalination and Water Treatment
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2024
·
IF 1
Jiaming Hu,Shuai Zhang,Chen Feng,Shanggeng Li,Longfei Zhang,Jiajun Ma,Qiang Yin
In this work, an efficient Fe 3+ adsorbent was synthesized by using the tryptamine and sodium carboxymethyl cellulose (CMC-Na) modified polyacrylamide gel. The functional monomers synthesized by the reaction of tryptamine and methacrylic acid chloride were doped into the composition, and CMC-Na participated in the formation of the gel network. By changing different conditions, the optimal use conditions of the gel were explored. The Langmuir and Freundlich isotherm models were used to discuss the adsorption behavior. According to the fitting results, the Freundlich model was more suitable for explaining the adsorption of Fe 3+ by gels. The feasibility of its adsorption process was confirmed by the study of its kinetics and thermodynamics. As an adsorbent, tryptamine CMC-Na modified polyacrylamide gel has excellent ability to remove Fe 3+ from aqueous solutions. The maximum adsorption capacity of tryptamine and CMC-Na modified polyacrylamide gel for Fe 3+ reached 127.5 mg g −1 .
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2016
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IF 3.138
Xinyi Zhu,Liping Bao,Yong Wei,Jiangquan Ma,Yong Kong
Sodium carboxymethyl cellulose (NaCMC) and chitosan (CS) are successfully combined via amidation, and the obtained product, CMC-CS-A, is used for the adsorption of toxic indigo blue (IB) for the first time. The results of control experiments indicate that the adsorption performance of CMC-CS-A is superior to that of NaCMC, CS, and the composites of NaCMC and CS integrated via electrostatic attractions (CMC-CS-E), which can be attributed to the unique interconnected porous network structure of the as-prepared CMC-CS-A. The mass fraction of CS in the CMC-CS-A is also investigated to achieve the best adsorption of IB, and it reveals that satisfactory removal of IB can be achieved at the CMC-CS-A (50 wt%). Important parameters such as contact time, temperature and initial concentration are discussed in detail in this work. Finally, adsorption isotherms and adsorption kinetics are investigated and compared by using classic models, and the results indicate that the adsorption fits well with the Langmuir isotherm model and the pseudo-second-order kinetic model. It opens a new avenue for the effective and convenient treatment of textile wastewater with integrated natural biopolymers.
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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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 43
·e202403318
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IF 1.9
Xinyue Zhang,Qiurong Chen,Yan Luo
Graphical In order to improve the stability and controlled release properties, NaClO 2 is microencapsulated based on emulsion crosslinking method adopting high biocompatibility sodium alginate (SA) and sodium carboxymethyl cellulose (CMC-Na) as shell material. The resulted sample is featured with selectivity and no secondary pollution, and brings about continuous degrading both liquid and gaseous formaldehyde. Sodium chlorite (NaClO 2 ) is a new type of air disinfectant, which can oxidize formaldehyde into carbon dioxide (CO 2 ) on account of releasing chlorine dioxide (ClO 2 ) gas under acidic condition. Unfortunately, NaClO 2 is prone to moisture absorption and decomposition when exposed to air. In this paper, NaClO 2 was microencapsulated based on emulsion crosslinking method for improving its stability and controlled release properties. Due to their high biocompatibility, sodium alginate (SA) and sodium carboxymethyl cellulose (CMC-Na) were selected as the wall material to prepare NaClO 2 -SA/CMC-Na composite microcapsules. The results showed that mean particle size of NaClO 2 -SA/CMC-Na composite microcapsules was about 225 nm, and their encapsulation ratio was up to 73.18%. In addition, the thermal stability and environmental tolerance of NaClO 2 are improved greatly through microencapsulating. It was proved by formaldehyde degradation testing that the efficiency of formaldehyde degradation using resulted samples can continue to increase after seven days in pH 6.5 environment, indicating their good controlled-release performance. Moreover, degradation efficiency on 30 µg/mL formaldehyde solution using the resulted microcapsules is up to 97.08%. Meanwhile, after 20 repetition degradation, NaClO 2 -SA/CMC-Na composite microcapsules can still continuously degrade formaldehyde gas. Therefore, NaClO 2 -SA/CMC-Na composite microcapsules reveal good stability and prolonged action on formaldehyde degradation.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Desalination and Water Treatment
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2016
·
IF 1.272
Yuhao Zhang,Chuang Yu,Zhenhua Lü,Sanchuan Yu
This study focused on the modification of flat-sheet polysulfone ultrafiltration membranes for nanofiltration (NF) through sequential deposition of poly(vinyl alcohol) (PVA) and sodium carboxymethyl cellulose (CMCNa) with glutaraldehyde cross-linking after each deposition. The contents of PVA and CMCNa in the coating solutions were varied to optimize the membrane performance and the modified membranes were characterized in terms of surface and permeation properties. It was found that the membrane surface became denser, more hydrophilic, and negatively charged at neutral pH after modification and the modified membrane possessed the NF separation characteristic. Under 5.0 bar, the optimized modified membrane exhibited a high-pure water flux of 89.5 l/m2 h and rejections of 37.8 and 93.8% to 500 mg/l NaCl and Na2SO4 aqueous solution, respectively. The modified membrane could also efficiently remove anionic dyes from aqueous solution, showing retentions of 99.7 and 99.5% to methyl blue and congo red, respectively, under neutral pH and 5.0 bar. Additionally, the modified membrane possessed good chlorine stability, and acid and alkaline resistances. The technique developed is potentially applicable for the fabrication of high-flux negatively charged NF membranes for partial desalination and anionic dye removal.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2017
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IF 4.055
Meng Pan,Jiajun Zheng,Yujian Liu,Qinglan Kong,Huiping Tian,Ruifeng Li
Hollow zeolite microspheres have attracted considerable interest due to their unique properties and great potential applications. In this work, we report a simple and cost-effective approach for constructing hollow zeolite microspheres based on a biomass-derived template, i.e., carboxymethylcellulose sodium (CMC). As an example, a hollow ZSM-5 microsphere with a hollow core smaller than 1 μm in diameter and a complete crystal shell is synthesized. This approach overcomes most of the limitations associated with the existing methods, such as complex operations and costly spherical templates. By studying the growth process in detail, a possible formation mechanism is proposed. The crystallization of the hollow zeolite microsphere is through a “surface to core” process, in which the interaction between the CMC and the zeolite gel and the decomposition of the polymer network play the critical roles.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 87
·84536-84546
·
IF 3.289
Jinsong He,Jiangdong Dai,Atian Xie,Sujun Tian,Zhongshuai Chang,Yongsheng Yan,Pengwei Huo
The development of practicable and retrievable adsorbents with high adsorption capacity is a technical imperative for water treatment. Herein, we reported a new convenient macroscopic granular adsorbent for the removal of tetracycline (TC) from water by immobilizing porous carbons (PCs) which were obtained via one-step in situ pyrolysis from ethylenediaminetetraacetic acid dipotassium salt dihydrate (EDTA-2K·2H2O) into carboxymethylcellulose sodium (CMCS) gel beads utilising molecular cross-linking. A remarkable similarity can be observed between multivariant gel beads and EDTA-2K·2H2O derived porous carbons (EPCs) according to the characterization results. The adsorption performance was evaluated using batch adsorption studies of TC in aqueous solution: the kinetic results could be fit well by a pseudo-second-order model and intraparticle diffusion was treated as the rate-controlling step; equilibrium adsorption data fitted well to the Langmuir adsorption isotherm yielding a maximum adsorption capacity of 136.9 mg g−1 at 298 K. Importantly, these results indicate that the as-prepared gel beads could be used as facile adsorbents in pharmaceutical wastewater treatment.
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
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Qingjiang Cheng,Xiuli Cheng,Xue Wang,Peixing Du,Chenzhen Liu,Zhonghao Rao
Erythritol has many advantages such as high latent heat, good stability, non-toxicity and abundance, which are extremely potential in the field of medium-temperature thermal energy storage . However, the application of erythritol in thermal energy storage is greatly restricts by high supercooling. Herein, sodium carboxymethyl cellulose (CMC Na) and hexagonal boron nitride (h-BN) are introduced to regulate the supercooling and thermal properties of erythritol. The crystal growth and nucleation process of erythritol is promoted effectively by CMC-Na and h-BN, as a result, the supercooling degree and solidification stability degree of erythritol is suppressed observably. According the results, while retaining the high latent heat of erythritol, the defect of supercooling of erythritol is effectively improved. The supercooling degree and solidification stability degree of erythritol are suppressed by 93% and 84%, respectively. Furthermore, the high latent heat, good thermal conductivity and excellent cycling thermal stability of erythritol composite phase change materials (ECPCM) are also available. This conclusion is important for supercooling regulation and thermal property optimization of erythritol, and indeed, can promote the utilization of erythritol in medium-temperature thermal energy storage.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2016
·Vol. 311
·期 3
·1577-1591
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IF 0.983
Zong Youli,Zhang Yongde,Lin Xiaoyan,Ye Dong,Luo Xuegang,Wang Jing
A novel microsphere adsorbent based upon carboxymethyl cellulose sodium/prussian blue composite loaded with Lanthanum(III) (CMC/PB-La) was successfully synthesized via electrostatic ejection device for removal of cesium from contaminated water, and characterized by FT-IR, SEM, EDX and XPS. Influencing factors to adsorption cesium were investigated, including solution pH, adsorbent dosage, contact time, initial concentration, temperature and competing ions. Linear Freundlich isotherm was fitted satisfactorily to the adsorption data, and the adsorption kinetic data was fitted well with pseudo-second-order model. Moreover, the results of γ-irradiation experiments indicate that CMC/PB-La has good radiation stability.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Jiamin Wu,Zhaoxue Feng,Chaohong Dong,Ping Zhu,Jianhui Qiu,Longxiang Zhu
In this study, sodium carboxymethyl cellulose/poly(acrylic acid) (CMC/PAA) microgels were successfully synthesized via visible-light-triggered free-radical polymerization to remove methylene blue (MB) from water. The microgels had a loose and porous 3-D network structure, exhibiting excellent adsorption performance. The equilibrium adsorption capacity and the removal efficiency of the microgels reached approximately 1479 mg/g and 97%, respectively, when the initial concentration of MB was 300 mg/L. The adsorption kinetics was well described by the pseudo-second-order model, and the adsorption isotherms followed the Langmuir isothermal model. Notably, CMC/PAA microgels could naturally settle and be separated from the MB solution. Furthermore, the recovery efficiency of the regenerated CMC/PAA microgels reached approximately 94% after five adsorption–desorption cycles. Therefore, the microgels could be used as promising adsorbents due to the advantages of high adsorption capacity, fast removal rate, and reusability.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2024
·
IF 3.3
Zirou Xiao,Shuang Wu,Hongshan Liang,Bin Li,Jing Li
BACKGROUND Growing public concern over the health risks of high-sugar diets has led to a consensus on the necessity of sugar reduction. This research evaluated the effects of oligosaccharides (OS), sodium carboxymethyl cellulose (CMCNa) and d -allulose as a compound improver on the quality of sugar-reduced bread, aiming to assess the feasibility of substantial sucrose reduction at the same time as maintaining desirable bread characteristics. RESULTS Compared to bread with a 90% sugar reduction, the improved formulation increased specific volume by 50.14% and reduced hardness by 66.69%. It exhibited a homogeneous structure and crust color closely resembling that of full-sugar bread. Low-field NMR analysis revealed better moisture control, delaying water loss and starch retrogradation, with relative crystallinity and retrogradation enthalpy decreased by 45.31% and 59.96%, respectively. Additionally, the combination of XOS and d -allulose boosted volatile compound production, increasing the abundance of aldehydes, esters and heterocyclic compounds, enriching the flavor with fruity and baked aromas. CONCLUSION The improvers enhanced the texture, appearance, flavor and storage stability of sugar-reduced bread, yielding qualities that are comparable to or even surpass conventional bread. These findings provide a new insight for the development of quality improvers designed for sugar-reduced bakery products. © 2024 Society of Chemical Industry.
研究领域:
食品科学
·
营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2025
·
IF 8.2
Hua Chen,Xiaonan Bian,Haoyuan Wang,Kaijie Shang,Zhiheng Zhao,Yijun Liu,Xue Lin,Xuewu Guo,Xiaoping Hu,Lu Wang
The effect of two modification methods, ultrasound and tannic acid (TA), on the structural, physicochemical, antioxidant, and antibacterial attributes of pectin‑sodium carboxymethyl cellulose (CMC) based composite film were assessed. The chemical structure and morphological analyses of the composite films revealed a 10 min ultrasound or adding 8 % TA improved the intermolecular interaction forces of the polymer, substantially leading to the formation of more dense gel network structures. Furthermore, the application of a 10 min ultrasound or the integration of 8 % TA caused a significant increase in the composite film's water resistance and mechanical strength. The incorporation of 10 % TA into the composite film induced the highest antioxidant activities and optimal antibacterial efficacies against both Staphylococcus aureus and Escherichia coli . Overall, the addition of appropriate TA has demonstrated a more pronounced enhancement of the physicochemical, antioxidant, and antibacterial properties of the composite film when compared to the modification through ultrasound.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2011
·
IF 2.775
Sanchuan Yu,Zhiwen Chen,Qibo Cheng,Zhenhua Lü,Meihong Liu,Congjie Gao
Submerged nanofiltration of anionic dye aqueous solution by laboratory-fabricated sodium carboxymethyl cellulose (CMCNa)/polypropylene (PP) thin-film composite hollow fiber membrane was investigated in this paper. The CMCNa/PP thin-film composite membranes were prepared through dip-coating CMCNa skin layer on the outer surface of polypropylene microporous hollow fibers followed by cross-linking with FeCl 3 . The molecular weight cut-off (MWCO) and surface zeta potential of the tailor fabricated membrane were estimated through permeation tests using different PEG solutions and measurements of surface steaming potential, respectively. Submerged nanofiltration tests were then performed with anionic dye solutions under different conditions. It was found that, at neutral pH, the negatively charged CMCNa/PP composite hollow fiber membrane with a MWCO of about 700 Da could effectively remove anionic dyes (Congo red and Methyl blue) from aqueous solution with good long-term performance stability and anti-fouling property through submerged nanofiltration. The dye retention and water permeability was affected by the trans-membrane pressure, the dye concentration as well as the presence of salt in the solution. The dye retention, water permeability and salt rejection rate to aqueous solution containing 2000 mg/l Congo red and 10,000 mg/l NaCl were 99.8%, 7.0 l/m 2 h bar, and lower than 2.0%, respectively.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）