CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Hong Li,Diyun Chen,Weixing Han,Jun He,Gang Song,Lingjun Kong,Minhua Su
Wastewater from uranium mining activities is highly acidic and contains uranium, thereby posing severe risks to the ecological environment and human health. Accordingly, uranium purification is extremely crucial. Herein, we delicately designed a novel adsorbent of diethylenetriaminepenta(methylenephosphonic) acid (DTPMP) and meso -SiO 2 modified γ-Fe 2 O 3 (γ-Fe 2 O 3 @SiO 2 @DTPMP, denoted as FSD), and found that the adsorbent can remarkably boost the removal performance of U(VI) under highly acidic conditions. The removal efficiencies of U(VI) by FSD are 90.26 % and 99.81 % in strong acidic solutions of pH = 1.0 and pH = 2.0, respectively, which are much higher than most of the reported adsorbents. Importantly, FSD exhibits high adsorption capacity (51.45 mg/g) and excellent anti-interference, even the wastewater stream contained a lot of organic substances ( e.g. , fulvic acid), cations ( e.g. , K + , Na + , Mg 2+ , NH 4 + , Zn 2+ , Co 2+ , etc.), radioactive nuclides ( e.g. , Cs + and Sr 2+ ). After five cycles, the adsorption efficiency and desorption efficiency of FSD only reduced by 8.83 % and 9.61 %, respectively, which are mainly attributed to the unique structures and good chemical stability of FSD. The removal of U(VI) by FSD is a heterogeneous adsorption process which is dominated by chemical adsorption, mainly involving surface coordination complexation. Multiwfn wavefunction and VMD programs based on density functional theory (DFT) further analyzed and visualized the interaction sites and relative strengths of reactions. The results of detailed characterization analysis and theoretical calculations confirmed that the highly efficient U(VI) removal by FSD is mainly ascribed to the strong coordination of the phosphate groups and amino nitrogen atoms in DTPMP with UO 2 2+ . Therefore, this study provides a promising strategy for the removal of U(VI) in strongly acidic wastewater.
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
ANALYTICAL CHEMISTRY
·
2017
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IF 6.32
Zhijiao Tang,Zhenhua Lin,Gongke Li,Yuling Hu
Fluorescent amino nitrogen quantum dots (aN-dots) were synthesized by microwave-assisted method using 2-azidoimidazole and aqueous ammonia. The aN-dots have a nitrogen component up to 40%, which exhibit high fluorescence quantum yield, good photostability, and excellent biocompatibility. We further explored the use of the aN-dots combined with AuNPs as a nanoprobe for detecting fluorescently and imaging of cysteine (Cys) in complex biological samples. In this sensing system, the fluorescence of aN-dots was quenched significantly by gold nanoparticles (AuNPs), while the addition of Cys can lead to the fluorescence signal recovery. Furthermore, we have demonstrated that this strategy can offer a rapid and selective detection of Cys with a good linear relationship in the range of 0.3–3.0 μmol/L. As expected, this assay was successfully applied to the detection of Cys in human serum and plasma samples with recoveries ranging from 90.0% to 106.7%. Especially, the nanoprobe exhibits good cell membrane permeability and excellent biocompatibility by CCK-8 assay, which is favorable for bioimaging applications. Therefore, this fluorescent probe ensemble was further used for imaging of Cys in living cells, which suggests our proposed method has strong potential for clinical diagnosis. As a novel member of the quantum-dot family, the aN-dots hold great promise to broaden applications in biological systems.
研究领域:
分析化学
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生物医学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·090545
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IF 4.316
Jia Wen,Zhenying Chen,Sheng Han,Jinhui Zhu,Changchun Ke,Emmanuel Kymakis,Xiaodong Zhuang
Poly(ethylene oxide) (PEO) is regarded as an attractive solid-state electrolyte in lithium-ion batteries (LIBs). However, relatively low ionic conductivity of pristine PEO is a critical bottleneck to boost high-performance solid-state LIBs. Herein, poly(2-aminoazulene) (PAAz) was synthesized using the oxidation polymerization strategy and acted as a polymeric filler in the fabrication of PEO−PAAz composite electrolyte. Compared with PEO electrolyte, the composite electrolyte had a better ionic conductivity (9.27 × 10−6 vs 6.47 × 10−5 S cm−1 at 30 °C), Li+ transference number (0.21 vs 0.51), and suppression of Li dendrites. Consequently, the PEO−PAAz electrolyte paired Li/LiFePO4 cell had a high capacity (156 mAh g−1 at 0.5 C, 1 C = 170 mA g−1) and stability (only 8% capacity loss after 300 cycles); these are better than those of the PEO-based cell (132 mAh g−1, 45% capacity loss). In addition, the PEO−PAAz-based cell could run for 1200 cycles with 60% capacity retention at 1 C. This study provides both a new organic filler for PEO-based solid-state LIBs and a method of improving the performance of solid-state LIBs, especially in terms of a long lifetime.
研究领域:
材料科学
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能源存储技术
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高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2021
·Vol. 45
·期 6
·e15556
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IF 2.19
Suping Li,Jingjing Liang,Yanli Ma,Yufeng Ding,Jiancheng Luo,Haiyan Yu,Jianfeng Sun,Yaqiong Liu
Red millet is a novel raw material for brewing Chinese rice wine. The physicochemical and structural properties of red millet (R1) were compared with those of five other brewing materials during pretreatment (soaking and steaming). Significant differences in physicochemical characteristics were found among raw grain varieties ( p < .05). R1 had the highest protein content (18.36/100 g). The total acid and amino nitrogen contents of all grains showed a fluctuating upward trend during the soaking process. The reduction in setback viscosity of most grains after soaking indicated that soaking treatment slowed the retrogradation of starch. The grains changed into a gelatinized form with expanded pores after steaming. Further brewing might be beneficial due to the high acidity of soaking water (12.77 g/L), low setback value (336.50 cp), and large pore structure of R1 after pretreatment. Novelty impact statement In this study, some new findings were as follows: (1) the protein and fat content of red millet was the most outstanding; (2) red millet soaked water showed the highest total acid and amino nitrogen contents; (3) during steaming, grain morphological transformed into expanded porous structure. These results would improve our comprehending of the raw material characteristics of red millet, thereby providing theoretical guidance for the production and brewing of red millet wine.
研究领域:
食品科学
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酿造技术
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农业化学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Yehua Liu,Hongying Li,Mingming Li,Linggao Liu,Kuan Lu,Shenghui Bi,Mixin Zhou,Li Chen,Lisha Lan,Minping Wei,Ying Zhou,Qiujin Zhu
This study explored the effect of electrical stimulation (ES) and Pediococcus pentosaceus LL-07 ( P. pentosaceus LL-07) and Staphylococcus simulans QB7 ( S. simulans QB7) on the quality and microbial community of loin ham during the ripening. After the ES and starter culture treatments, the Aw and pH were decreased. Surface hydrophobicity, myogenic fiber fragmentation index (MFI), TCA-soluble peptide, amino nitrogen and free amino acids (FAAs) were also significantly higher than the control group (CK) ( P < 0.05). This increase was more significant in the E-S group (electrical stimulation followed by inoculation with P. pentosaceus LL-07 and S. simulans QB7) than the rest of the experimental group (E、S、S-E group). Furthermore, the CK and E-S groups were subjected to a bacterial community comparison experiment. The microbial diversity of these two groups was increased. Pediococcus spp. and Staphylococcus spp. became the dominant bacteria in E-S groups during the ripening. Correlation analyses show a strong correlation between protein hydrolysis, microorganisms and FAAs. In conclusion, the combination of ES and starter culture could promote protein hydrolysis, the accumulation of FAAS, and improves the bacterial community of loin ham.
研究领域:
食品科学
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微生物学
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生物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）