Journal of Cleaner Production
·
2020
·
IF 7.246
Shasha Wang,Yuelong Xu,Junfeng Miao,Mengshuai Liu,Bin Ren,Lihui Zhang,Zhenfa Liu
Microporous carbon xerogels (CXs) were successfully fabricated via a facile one-pot strategy using eutectic salt mixture (KCl and ZnCl 2 ) as dual activator and catalyst. Their pore structures, morphology, and selective CO 2 adsorption behaviors were thoroughly studied by varying the contents of eutectic salt mixture. The presented CXs herein showed excellent CO 2 adsorption selectivities , and the CX-4 with optimum salt concentration (12.9%) exhibited the highest CO 2 adsorption capacity of 4.39 mmol g −1 at 273 K, which was ascribed to their special microscopic pore structure. Compared with the reported carbon materials, the optimum CX-4 exhibits a comparable or superior CO 2 adsorption performance under similar conditions, showing great potential for efficient CO 2 capture and separation from flue gas and natural gas.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Panpan Li,Jianguo Zhang,Yongfa Yu,Wenlin Jia,Shuang Zhao
A collaborative coagulation strategy was proposed in this paper for algae-laden and dye-containing water treatment to realize the efficient, low-carbon, low-cost, fast, and synchronous removal of algal organic matters (AOMS) and dyes. Chemical conditions were optimized to achieve a higher collaborative coagulation efficiency, and the contributions of AOMS with different components and molecular weights (MW) were systematically analyzed to elucidate the mechanism of collaborative coagulation. Results showed that dye removal was enhanced with an increase in the proportion of AOMS (<50%). Collaborative coagulation efficiency showed a considerable dependence on the components of AOMS with high MW. 37.50% polysaccharides, 11.89% proteins, and 41.16% humic acid (HA) with WM higher than 100 kDa contributed 47.83–64.44% of the dye removal. The cross-linking reactions between the alum coagulant, AOMS, and dye active groups generated flocs with larger sizes and better settling abilities. Under alkaline conditions, alum hydrolysates produce efficient Lewis binding sites and lower steric hindrance, whereas AOMS deprotonation auxiliaries the formation of conjugated coordination and hydrogen bonds. These synergistic adsorption bridging effects were generated and the coagulation efficiency increased. Overall, the collaborative coagulation strategy realized the reutilization of algae-laden water from a new perspective, and achieved higher dye removal with a shorter hydraulic retention time, which are of great significance for the development of water treatment technology, energy savings, and emission reduction.
研究领域:
环境科学
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水处理技术
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 39
·23846-23850
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IF 3.361
Rongshan Lan,Yiyang Liu,Ling Han,Jing Yang,Huiqin Yin,Min Ge,Xiaobin Fu,Hongtao Liu,Yuan Qian
In this study, by applying 19F, 23Na and 7Li high-resolution NMR methods, the evolution of the [ZrxFy]4x−y local ionic structures in FLiNaK–ZrF4 salt mixtures were elucidated. K3ZrF7, Na3ZrF7 and Na7Zr6F31 crystal phases were identified when the melt salts were being solidified. The distribution of these [ZrxFy]4x−y species was dependent on the content of ZrF4 in FLiNaK eutectic salts. Moreover, K3ZrF7 phase transition from an orthorhombic lattice into a disordered cubic lattice was clarified, thereby causing dynamics of the coordinated F− ions to be reduced and the well-ordered crystal lattices to be destroyed. These mentioned results provide a further insight into the Zr–F based ionic structure and the formation of the disordered Zr–F structure in ZrF4-based eutectic salts.
研究领域:
材料科学
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核能工程
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物理化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jun Guo,Xia Xu,Ruoying Yang,Yingang Xue,Liping Wang,Qiuya Zhang,Mingguo Peng,Xuefeng Liu
The combination of organic and inorganic coagulants is considered to be an effective strategy for Humic Acid (HA) removal. In this study, the performance of Titanium-based coagulants aided by Cationic-Polyacrylamide (CPAM) to HA molecules was compared. It was found that CPAM had a higher promotion effect in the TXC system. The reason for why CPAM was more suitable for the TXC system could be explained by analyzing Zeta potential , FTIR, and XPS . By comparing the coagulation mechanism of TiCl 4 (TC) and Poly-Titanium Chloride (PTC), we found that complexation was the main mechanism of TC and PTC in acidic and neutral environments. The C-O-Ti Bond was formed by complexing the Ti-OH with the C-OH and -COOH functional groups of HA molecules. Sweeping was the most important removal mechanism of TXC in the neutral and alkaline environment, and CPAM bridged floc through hydrogen bond force for enhancing the sweeping effect. In addition, the role of CPAM in TXC system was further demonstrated by Zeta potential analysis. Both TC and PTC were positively charged in the measured pH range, so the removal of Humic acid was limited by increasing zeta potential. In both neutral and alkaline environments, TXC kept a negative surface charge and CPAM significantly enhanced the adsorption of HA on the TXC floc surface. This study provided clues for the interaction mechanism between titanium salt coagulants and HA, and it also provided a reference for the application of TXC coagulant combined with CPAM flocculant for the removal of HA molecules.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Peng Cheng,Yidi Huang,Chao Wu,Xiaoping Wang,Xiaorui Fu,Pan Li,Yanling Liu,Shengji Xia
Two-dimensional (2D) membranes were constructed using porphyrin-based metal organic frameworks (MOFs), i.e., copper-tetrakis(4-carboxyphenyl) porphyrin (Cu-TCPP), for efficient molecular sieving of dye/salt mixture solutions. These novel membranes contained a regular Cu-TCPP nanosheet filter layer fabricated by the vacuum filtration method to retain the oriented interlayer structure of the MOF material, resulting in a robust 2D membrane. The hydrated Cu-TCPP membrane with a thickness of 300 nm displayed high retention rates for dyes (90.1% for crystal violet (CV), 93.3% for Chrome black T (CB-T), 99.7% for Methyl blue (MB) and 99.8% for Congo red (CR); CV, Mw= 407.9 g/mol; CB-T, Mw=416.4 g/mol) with diameters approximately greater than 1.3 nm. A water permeance of 840.1 L·m −2 ·h −1 ·bar −1 and a CR (Mw= 696.7 g/mol) rejection rate of 99.9% were obtained with the optimal metal−porphyrin framework membrane (small lamellar dimension nanosheets) undergoing the cross-flow mode filtration of dye/salt mixture solutions for 24 h. More importantly, due to the abundant interlayers and regular surface nanochannels, the Cu-TCPP membrane exhibited a low salt rejection rate (0.4% for NaCl) and an outstanding CR/NaCl selectivity (as high as 249.5), which was more superior compared with that of other reported two-dimensional membranes. Additionally, the nanochannels of the membrane presented strong rigidity under pressure load as high as 0.4 MPa, endowing the membrane with high tolerance to shear stress and good antifouling performance after several fouling-cleaning cycles.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2019
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IF 3.782
Qiuyu Li,Weihong Zhao,Hui Miao,Xiaotian Han
This work attempted to prolong the validity of the molybdate mixed solution and ascorbic acid solution used in the phosphomolybdenum blue spectrophotometric method by improving their preservation according to the influence factors. The results showed that the molybdate mixed solution can be directly preserved in darkness with validity over half a year. The ascorbic acid solution is influenced by light, temperature, pH, metal ions , oxygen, and bacteria. The validity of ascorbic acid is shortened as the temperature rises. Through keeping in darkness, adding complexing agents , adjusting pH, removing oxygen and sterilization, the validity of ascorbic acid solution was prolonged to over 2.7 times under 4 °C and over 5 times under 25 °C. At the same time, the hybrid solution of ascorbic acid solution and molybdate mixed solution should be preserved separately, otherwise the using effect is poor.
研究领域:
海洋化学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2015
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IF 4.642
Ruihua Li,Baoyu Gao,Shenglei Sun,Qinyan Yue,Meng Li,Xudan Yang,Wuchang Song,Ruibao Jia
In this study, a lignin-based flocculant (LNF) was synthesized by grafting amine groups into alkali lignin containing papermaking sludge. Characterization of LNF, such as FTIR, zeta potential, cationic degree, viscosity, and molecular weight, showed that the product was a cationic polymer with high solubility. LNF was used with aluminum sulfate (AS) and polyaluminum chloride (PAC) in humic acid coagulation to demonstrate its efficiency. Coagulation behavior and floc properties of LNF+PAC and LNF+AS dual-coagulant were comparatively evaluated. Results showed that the coagulation aid effect of LNF was independent of aluminum species. Addition of LNF could enhance humic acid removal efficiency and floc properties including size, strength, and fractal dimension significantly. The effect of solution pH on coagulation processes was also studied. Dual-coagulants showed the same variation trend as that of aluminum-based coagulants but enhanced coagulation performance during the investigative pH range. Flocs formed at pH 9 and pH 5 achieved maximum floc size in AS and PAC coagulation systems, respectively. Fractal dimension was relatively high at pH 7–9 due to the sweeping effect of aluminum hydrolysates. Overall, LNF brought in charge neutralization and absorption bridging effect and played a positive role in coagulation processes.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Science-Advanced Materials and Devices
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2025
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IF 6.8
Baiyuan Tian,Chuang Zhu,Manting Gu,Minhao Xu,Wenxuan He
This study aims to discover innovative thermal storage materials that fulfill the specifications of concentrated solar power systems. Thermal storage materials based on ternary eutectic (Hitec) with nano-SiO 2 and nano-MgO are investigated. Simultaneous thermal analysis and laser flash analysis are used to study the main properties of materials. The results indicate that the inclusion of nano-SiO 2 and nano-MgO reduces the melting point while enhancing the latent heat of the base salt. Doping the base salt with 0.3 wt.% nano-SiO 2 and 0.7 wt.% nano-MgO results in molten salt nanocomposites with an average specific heat of 2.16 J/(g⋅K), which is 54.3% higher than that of the base salt. This surpasses the specific heat of the base salt mixed with a single type of nanoparticle. The thermal conductivity of this nanocomposite is increased by 13.13% to 0.836 W/(m⋅K) compared to the base salt. Furthermore, this study demonstrated that the effect of interfacial thermal resistance on specific heat capacity and heat transfer characteristic is opposite. While the nanoparticles can increase the specific heat capacity of the molten salt, they can also reduce the heat transfer rate within this material.
研究领域:
材料科学
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能源工程
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纳米技术
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产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2013
·Vol. 8
·期 6
·1306-1312
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IF 4.572
Xin-Yu Zhao,Ying-Jie Zhu,Feng Chen,Bing-Qiang Lu,Chao Qi,Jing Zhao,Jin Wu
Graphical Exerting control : A simple, room-temperature synthesis of calcium phosphate hybrid nanoparticles (CaP-HNPs) by using poly(diallyldimethylammonium chloride) (PDADMAC) and poly(acrylate sodium) (PAS) as dual templates is described (see picture). The as-prepared CaP-HNPs are promising anticancer drug (docetaxel; Dtxl) nanocarriers for cancer therapy. en Calcium phosphate hybrid nanoparticles (CaP-HNPs) have been synthesized in aqueous solution through self-assembly by using two oppositely charged polyelectrolytes (poly(diallyldimethylammonium chloride) (PDADMAC) and poly(acrylate sodium) (PAS)) as dual templates. First, the PAS/Ca 2+ and PDADMAC/PO 4 3− complexes form through electrostatic interactions and then two complexes self-assemble into CaP-HNPs after mixing them together. The as-prepared CaP-HNPs exhibit a spherical morphology with a narrow size distribution, good dispersibility, and high colloidal stability in water. The CaP-HNPs are explored as a nanocarrier for the anticancer drug docetaxel (Dtxl). The CaP-HNPs show excellent biocompatibility, high drug-loading capacity, pH-sensitive drug-release behavior, and high anticancer effect after being loaded with Dtxl. Therefore, the as-prepared CaP-HNPs are promising drug nanocarriers for cancer therapy. zh 1
研究领域:
材料科学
·
药学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
MEAT SCIENCE
·
2024
·
IF 5.7
Haibo Shi,Yongjie Li,Jiabao Zheng,Xianqi Yao,Wei Wang,Igor Tomasevic,Weizheng Sun
This study aimed to investigate the performance differences of low-sodium myofibrillar protein (MP) gels substituted by different chloride salt mixtures from the perspective of gelation process. The results revealed that low-sodium MP substituted by KCl/CaCl 2 exhibited higher turbidity and particle size at 40 % substitution, and formed protein aggregates earlier at 53 °C. During the gelation process, KCl/CaCl 2 increased the extent of cross-linking as the substitution level increased from 10 % to 40 %, which was prone to forming final gels with poor palatability. Microstructural and binarization results visually indicated that an irregular reticular structure composed of partial clusters formed when the temperature heated over 53 °C, and the cross-linked cluster blocks further shrunk from 53 °C to 73 °C. Rheological amplitude sweeps revealed that KCl/CaCl 2 -substitued MP displayed a faster fracture of the ductile structure, and this influenced the distribution of cluster blocks inside the network. The introduction of salt mixtures altered protein conformation, and more unordered structures were found in low-sodium MP containing CaCl 2 , rather than MP containing MgCl 2 . Additionally, Ca 2+ ions increased the thermo-denatured temperature of MP, and extended the relaxation time of bound water at 53 °C, and Mg 2+ ions slowed down the degree of liquid loss at 53 °C. As a result, the low-sodium MP containing CaCl 2 exhibited a lower expansion of protein structure accompanied by the involvement of less proteins in gel formation and more liquid loss in the final gel.
研究领域:
食品科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jialin Liang,Jinjia Huang,Siwei Zhang,Xian Yang,Shaosong Huang,Li Zheng,Maoyou Ye,Shuiyu Sun
High levels of extracellular polymeric substances (EPS) and bound water in sludge negatively impact sludge dewaterability. This study applied a novel sludge conditioning process involving calcium hypochlorite (Ca(ClO) 2 ) oxidation, ferric coagulant re-flocculation, and walnut shell (WS) skeleton construction to remove EPS and bound water and improve sludge dewaterability. The study also described the underlying mechanisms for this activity, by investigating the changes in EPS distribution, morphological structure, flocs morphology, rheological behavior, and bound water. Using single factor experiments, the optimal dosages of the composite conditioner included 10 mg/g dry solid (DS) of Ca(ClO) 2 , 60 mg/g DS of ferric chloride (FeCl 3 ) or 100 mg/g DS of polymeric ferric sulfate (PFS), and 600 mg/g DS of WS. Using a novel pressure filtration system, the moisture content of the dewatered sludge cake conditioned with Ca(ClO) 2 /ferric coagulant/WS was reduced to below 50 wt%. The study described a three-step mechanism for the composite conditioning of sludge. First, protein-like substances and polysaccharide-like materials in the EPS and bound water were degraded by Ca(ClO) 2 oxidation. Second, the porous structure and compact flocs were re-flocculated using high charge neutralization and the bridging ability of ferric coagulant. The flowability increased and the viscosity decreased compared with raw sludge. Third, a rigid networked structure was formed by adding the WS skeleton. The combined Ca(ClO) 2 /ferric coagulant/WS treatment had a significant synergistic effect supporting dewatering. The filter liquor of the combined treatment has a lower impact on the environment. The combined treatment is an appropriate was to treat sludge prior to landfilling and incineration. Furthermore, the economic analysis showed that using the Ca(ClO) 2 /FeCl 3 /WS treatment had economic advantages over other treatments.
研究领域:
环境工程
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废水处理
·
污泥管理
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Weijia Zhang,Jingqi Shen,Tianhong Liu,Chenghua Chen,Jinlin Wang,Fan Bai,Peng Xu,Ruichang Gao,Yuanhui Zhao,Xinxing Xu
This novel study explored how “roe rubbing” and “salt mixing” qualitatively transform fish roe into caviar, focusing on membrane phospholipids (PLs) and proteins. Salt mixing increased phosphatidylcholine (PC) concentration in membrane PLs, while DHA, linolenic acid, and linoleic acid levels decreased. After roe rubbing and salt mixing, Raman spectra of membrane PLs decreased at 1300, 1450, and 1655 cm −1 , indicating decreased torsional freedom of motion and C C telescopic vibration intensity. The hydrophobic environment formed by salt and interchain repulsion led to hydrogen bonding network, causing conformational changes in membrane proteins and increases in α-helix, β-sheet composition. Roe rubbing induced temporary disruption of protein chemical bonds, while eliminating contaminants mitigated off-flavors and improved the tissue condition. Salt caused osmotic pressure to release more lipids, which increased membrane thickness and consistent internal pore size, giving caviar elasticity and fullness. This work enhanced theoretical direction for caviar processing quality.
研究领域:
食品科学
·
生物化学
·
食品加工
·
光谱学
·
膜生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）