Energies
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2019
·Vol. 12
·期 15
·2966
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IF 2.707
Pijian Gong,Xinxue Li
In this study, NaClO2was selected as a denitration oxidant. In order to clarify the mechanism of NaClO2as an oxidation agent for NO removal efficiency, the effects of H+and other factors (NaClO2concentration, temperature, and the other gas) on the NO removal efficiency were investigated. NaClO2showed a promotional ability on NO removal, whose efficiency increased with the increase of NaClO2concentration. One hundred percent removal efficiency of NO could be achieved when the NaClO2concentration was 0.014 mol/L. Furthermore, raising the reaction temperature benefited the removal of NO. The lower the pH, the better the NO removal efficiency. The promoting effect of H+on the NO removal was studied by the Nernst equation, ionic polarization, and the generation of ClO2. Under the optimal conditions, the best removal efficiency of NO was 100%. Based on the experimental results, the reaction mechanism was finally speculated.Keywords:sodium chlorite (NaClO2);wet scrubbing;removal efficiency;NO reaction mechanism
研究领域:
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
ENERGY & FUELS
·
2021
·
IF 3.605
Wenbo Jia,Chuanmin Chen,Songtao Liu,Yue Cao
In this study, the Hg0 removal characteristics of NaClO2 in limestone slurry were investigated in a bubbling reactor. The effects of slurry conditions (pH, temperature, and Cl– concentration) and flue gas components (NO, SO2, HCl, etc.) on Hg0 removal activity and efficient Hg0 removal duration were explored. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the solid products prepared under different conditions. It was found that NaClO2 exhibited superior Hg0 removal activity when both SO2 and NO were present in the flue gas, while the Hg0 removal efficiency reduced significantly in the absence of SO2 and/or NO. The Hg0 removal activity of NaClO2 decreased significantly with the increase of pH value. The slurry temperature had no obvious effect on Hg0 removal activity, while higher temperature could enhance the Hg0 re-emission at a later stage. However, the presence of Cl– in limestone slurry could notably inhibit the Hg0 re-emission. The characterization results showed that the presence of SO2 and NO promoted the formation of HgCl2, Hg(NO3)2, and HgSO4, thus significantly enhancing the Hg0 removal activity of NaClO2 in limestone slurry.
研究领域:
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
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2016
·
IF 1.207
Jie Wang,Wenqi Zhong
Experiments on simultaneous absorption of SO 2 and NO X from sintering flue gas via a composite absorbent NaClO 2 /NaClO were carried out. The effects of various operating parameters such as NaClO 2 concentration ( m s ), NaClO concentration ( m p ), molar ratio of NaClO 2 /NaClO ( M ), solution temperature ( T R ), initial solution pH, gas flow ( V g ) and inlet concentration of SO 2 ( C S ) and NO ( C N ) on the removal efficiencies of SO 2 and NO were discussed. The optimal experimental conditions were determined to be initial solution pH = 6, T R = 55 °C and M = 1.3 under which the average efficiencies of desulfurization and denitrification could reach 99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO 2 aqueous solution is favorable for the generation of ClO 2 and Cl 2 which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising.
研究领域:
环境工程
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化学工程
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能源技术
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污染控制
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工业生态学
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DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Zili Zhang,Yao Lin,Jianwei Meng,Lei Wang,Qin Yao,Xiaohan Chen,Guodong Dai,Yi Zhao,Runlong Hao
Our previous work had demonstrated that UV/NaClO2 was the best advanced oxidation method in terms of nitric oxide (NO) removal, but we have not studied the impact of the fly ash on NO removal under such conditions. For this, this paper selected six kinds of fly ashes and studied their effects on NO removal. The micromorphology, elemental composition, and the elemental oxidation states of these six fly ashes were characterized by scanning electron microscopy-energy-dispersive X-ray spectra, X-ray photoelectron spectroscopy, and inductively coupled plasma methods. The main inorganic components in the six fly ashes are metal oxides (Fe2O3/Fe3O4, SiO2, Al2O3, ZnO, MgO, and TiO2), carbonates (Na2CO3 and CaCO3), and chlorides (NaCl, KCl, and MgCl2). The experimental results suggested that high solubility was the premise condition for the fly ashes exhibiting an inhibitory effect on NO removal. Among all of the metal compounds, Fe2O3/Fe3O4 exhibited the highest inhibitory contribution rate to the NO removal (22.9–45.7%). The anions of Cl– and CO32– acted as scavengers for the free radicals which greatly impaired the oxidation of NO. Based on the simulation experimental results and the UV–vis analysis, the order of inhibitory contribution rates of various metal compounds to the NO removal was determined as Fe2O3/Fe3O4 > TiO2 ≈ Na2CO3 > Al2O3 ≈ ZnO ≈ MnO2 > CaCO3 > NaCl > KCl ≈ SiO2 ≈ MgCl2.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 23
·3361
·
IF 4.7
Jing Wang,Ling Sun,Ying-Ying Chu,Yong-Qi Ou,Bo-Wen Liang,Zi-Jian Shan,Chang-Bao Han,Hui Yan
Bamboo is widely distributed around the world as an excellent renewable resource. However, the structural and morphological changes in the bamboo samples in extracting bamboo cellulose fiber using alkaline-acidic sodium chlorite are unclear, and the potential for preparation of cellulose packaging films is yet to be explored. In this paper, the changes in micro-morphology, chemical structure, and pyrolytic behavior of moso bamboo powder during alkaline and acidic sodium chlorite pretreatment were intensively investigated. The bamboo cellulose fiber (BC) diameter decreased from 14.41 to 11.79 µm with the treatment as a result of the removal of amorphous materials such as lignin and hemicellulose. The BC was dissolved in NaOH/urea aqueous solution, and all-cellulose composite films were obtained with excellent mechanical properties and high transparency. When the BC contents reached 4 wt%, the resulting films had a light transmittance of about 90% in the visible light range (400–780 nm), and the tensile strength was as high as 57.9 MPa, which was much higher than that of the polyethylene packaging film (PE, 35 MPa). In addition, the film also suggests superior biodegradability compared to PE films. Therefore, the current shortage of raw materials and environmental pollution faced by plastic packaging materials may be expected to gain new inspiration in this study.
研究领域:
材料科学
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林业工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
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2021
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IF 5.039
Lechen Yang,Yan Wu,Feng Yang,Wenhao Wang
As one of the most sustainable resources, wood has been widely used in the fields of construction, decoration, flooring and furniture. The emergence of transparent wood further expands the application fields of wood to solar cells, luminescent magnetic switches, artificial electronic skins and stress sensors. However, most of the transparent woods reported are obtained by impregnating resins such as polymethylmethacrylate (PMMA), epoxy resin (EP) and polyvinylpyrrolidone (PVP). Here, we demonstrated a flexible transparent wood prepared based on a deep eutectic solvent composed of acrylic acid and choline chloride. The light-absorbing chromophore group of natural wood was removed by the sodium chlorite delignification method to obtain the treated wood template, then the deep eutectic solvent was infiltrated into the wood template, and the final transparent wood was obtained by photo-initiated polymerization. This transparent wood has excellent stretchability (maximum tensile strain up to 73.9%), flexibility and tensile resilience. Moreover, this transparent wood also has good electrical conductivity and temperature sensing properties. The electrical signal of transparent wood has very favorable stability and repeatability in multiple heating–cooling cycles, indicating its great potential as a temperature sensor.
研究领域:
材料科学
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纳米技术
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可持续材料
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高分子科学
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传感器技术
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产品关联
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
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2022
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IF 2.455
Ying Zhang,Ting-Ting Li,Bing-Chiuan Shiu,Ching-Wen Lou,Jia-Horng Lin
The chromaticity coordinates and luminance factor are important indicators of the fluorescent dyeing performance of fluorescent dyed fabric. However, with the current bleaching pretreatment process, the chromaticity coordinates and luminance factor of fluorescent yellow dyed modacrylic/cotton blended fabric usually do not meet the requirements of standard ISO 20471. Here we report a new type of bleaching process method via sodium chlorite to solve the problem of yellowing of the background color of the modacrylic/cotton blended fabric. Compared with hydrogen peroxide bleaching, the whiteness of the modacrylic/cotton blended fabric was increased by 13.52% with sodium chlorite bleaching. The color performance analysis showed that the chromaticity coordinates and luminance factor of fluorescent yellow dyed modacrylic/cotton fabric after exposure to xenon light or washing cycles could meet the standard ISO 20471 requirements. Moreover, the fluorescent yellow dyed fabric has good color fastness, such as rubbing resistance, perspiration, laundering at 60°C, and dimensional stability. In addition, the fluorescent yellow dyed blended fabric also has flame retardant performance. Our work may provide a method for the preparation of high-visibility fluorescent yellow fabric with flame retardant performance. It could be used for multifunctional personal protective equipment.
研究领域:
纺织科学
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染整工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Bin Zheng,Long Zhou,Chengjie Xue,Kuang Wang,Zhanqiang Fang
Oxalic acid-modified ball-milled zero-valent iron (OA-ZVI bm ) was employed to activate sodium chlorite (ClO 2 - ) for the removal of norfloxacin (NOR). The complete removal of 20 mg/L NOR was achieved within 60 min by the OA-ZVI bm /ClO 2 - process. Compared with the ZVI bm /ClO 2 - process which was the ball-milled zero-valent iron (ZVI bm ) activate sodium chlorite, the reaction activity of the OA-ZVI bm /ClO 2 - process was increased by 102.6 times. Through scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), electrochemical testing, and density functional theory (DFT) calculations, which has been confirmed that the introduction of oxalic acid can significantly increase the surface Fe(II) content of OA-ZVI bm , and accelerate the electron transfer rate of iron nuclei, thereby improve the efficiency of ClO 2 - activation for the removal of NOR. The role of various active species in NOR removal, which were •O 2 - , 1 O 2 , Fe(IV), ClO 2 , and •OH, was elucidated through free radical quenching experiments, electron paramagnetic resonance (EPR) spectroscopy, and quantitative detection of active species. These active species all participated in the reaction, while •O 2 - played a dominant role in the reaction because it could transform into other active species, such as (•OH, 1 O 2 ). Inorganic anions and natural organic matter have no significant effect on the removal of NOR in the OA-ZVI bm /ClO 2 - process. The protonation of oxalic acid ensured its good pH applicability range (pH = 2–11), thus exhibiting excellent performance in NOR removal in real water bodies. This further demonstrates that OA-ZVI bm prepared by oxalic acid ball milling modification is an efficient ClO 2 - activator, offering promising prospects for antibiotic removal technology.
研究领域:
环境科学
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水处理
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Food Packaging and Shelf Life
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2022
·
IF 8.749
Haiyu Du,Tiantian Min,Xiaoli Sun,Liping Zhou,Xiaochun Bian,Zhu Zhu,Yongqiang Wen
Microbial infection, juice overflow, and water condensation from respiration and transpiration can cause premature spoilage of fresh produce. Here, a cellulose acetate/polyvinyl alcohol-g-polyacrylic acid/polyurethane (CA/PVA-g-PAA/PU) triple-layer nanofiber pad loaded with sodium chlorite and citric acid was prepared by electrospinning technique and thermal crosslinking, which possessed excellent liquid transfer, absorption, barrier, and antimicrobial properties. Depending on the wettability difference between the CA transfer layer and PVA-g-PAA absorbent layer, this pad could directionally transfer and absorb produce-generated liquid, preventing fresh produce from being wetted. Meanwhile, the PU barrier layer protected the paper packaging from being soaked. More importantly, absorbed liquid activated the reaction between sodium chlorite and citric acid for moisture-controlled releasing chlorine dioxide, thus inhibiting Escherichia coli , Staphylococcus aureus , and Aspergillus niger . In addition, the pad showed desirable biocompatibility, fresh-keeping effect, and sensory influence. Therefore, the antimicrobial absorbent pad with three functional layers provided an innovative strategy for designing multifunctional packaging.
研究领域:
材料科学
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食品科学
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生物技术
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农业工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Jianwei Luo,Yingsi Huang,Xinghai Huang,Jinyun Cai,Haiyi Zhong
Emphasizing the use of biomass resources is a vital step in advancing green chemistry and environmental protection, significantly contributing to the reduction of carbon emissions and the promotion of carbon neutrality. Converting agricultural waste into biomass resources, such as nanocellulose, is of great significance for a low-carbon economy. Furthermore, the challenge of environmentally friendly and selective separation of natural active plant ingredients still needs to be addressed. In this study, drawing inspiration from the wisdom of “Pods burned to cook peas”, the biomass of the nonmedicinal portion of the herbal medicine (Sophora tonkinensis Gagnep.) was processed to obtain nanocellulose for the preparation of a magnetic molecularly imprinted composite, which was used to separate quercetin from the medicinal portion of this herbal medicine. The stacked complex of magnetic Fe3O4 nanoparticles and nanocellulose particles served as the carrier, and the magnetic nanocellulose molecularly imprinted polymer (MIPs/MCNC) was prepared through surface imprinting. It exhibited a strong adsorption capacity (Qe = 50.64 mg/g) and imprinting factor (IF = 2.55) as well as specific selectivity (Ks’ = 3.48) against structurally similar compounds (naringenin). The regeneration capability remained at 75% after 5 adsorption-elution cycles. It was also successfully applied in a complex solvent environment to selectively separate quercetin from the deep eutectic solvent (DES, choline chloride─acrylic acid) extract of S. tonkinensis Gagnep. Additionally, an interdisciplinary approach was integrated into the design process of MIPs/MCNC, utilizing density functional theory (DFT) to effectively guide the design of functional monomers. This work presented a concept with significant potential for reusing the nonmedicinal parts waste of herbal medicine as nanocellulose and for the environmentally friendly and selective separation of active components.
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产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Zelong Li,Shiqi Qin,Zhongyang Bai,Yingcheng Hu
This study aims to address the drawback of traditional epoxy resin-based wood composites being non-reusable after damage by employing epoxy vitrimer (EPV) containing dynamic imine bonds to infiltrate delignified wood (DW) frameworks, fabricating a reprocessable multilayer wood composite (MLWC) through cross-lamination. Experimental results demonstrated that while maintaining a high tensile strength (63.46 MPa) comparable to natural wood (NW), the material achieves interlayer damage repair and multiple reprocessing capabilities via reversible exchange reactions of dynamic imine bonds at elevated temperatures. After hot-pressing treatment, the strength recovery rate of bending-damaged specimens reached 63.87%. Multiple reprocessing tests confirmed that the material maintains a stable chemical structure and exhibits no significant deterioration in thermomechanical properties following microstructural reorganization. Although reprocessing reduced tensile strength to 17.34 MPa due to wood fiber fracture, mechanical performance showed no progressive decline with reprocessing cycles. The developed composite exhibits excellent comprehensive properties, demonstrating potential as a low-cost and sustainable structural material for applications such as structural components or automotive interiors.
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xinyuan Wan,Xiaojian Xia,Youzhe Zhen,Biaohua Zhang,Deyuan Lin,Yunxiang Chen
Ice accumulation poses significant threats to safety and energy efficiency across aerospace, energy, and transportation sectors. While conventional active de-icing methods suffer from high energy demands and environmental concerns, passive superhydrophobic surfaces offer limited ice prevention. To overcome these limitations, this study develops a robust, multifunctional photothermal superamphiphobic composite by integrating MXene (Ti 3 C 3 T x ) nanosheets with densified wood substrates and a gradient hierarchical coating. Delignified wood exposes hydrophilic cellulose nanofibers, enabling uniform MXene loading (up to 40 wt%) via drop-casting.Densification compresses MXene/wood, enhancing hydrogen bonding, thermal conductivity (photothermal heating rate: 4.9 ℃ s -1 ), and electromagnetic interference (EMI) shielding (80 dB at 40% MXene). A sequentially sprayed resin-based primer (with nylon microparticles) and fluorinated silica nanoparticle topcoat create a micro-nano hierarchical gradient superamphiphobic (SAP) surface, achieving contact angles >150° for water and oils, low adhesion, and self-cleaning functionality. Under 1-sun illumination, the composite rapidly melts ice within 60 s at -10 °C. The material also exhibits high mechanical strength (253.6 MPa after densification; 155-173 MPa post-coating) due to interfacial hydrogen bonding and structural integrity. This work presents a sustainable, active-passive anti-icing strategy with dual functionality in photothermal de-icing and EMI shielding, leveraging renewable wood resources and efficient MXene photothermal conversion.
研究领域:
材料科学
·
纳米技术
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能源工程
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环境工程
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电磁干扰屏蔽
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防除冰技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）