JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Hong Li,Yuhao Zhang,Dexin Sun,Liang Zhao,Jinsen Gao,Chunming Xu
In order to investigate the ability of N -methyl-2-pyrrolidone (NMP) to extract aromatics (benzene, toluene) and sulfides (3-methylthiophene, thiophene) from n-hexane, the liquid-liquid equilibrium (LLE) data of n-hexane + {benzene, toluene, thiophene or 3-methylthiophene} + NMP systems were determined at 293.15 K under 101.3 kPa. The Othmer-Tobias and Hand equations were applied to validate the reliability of the obtained LLE data, and the correlation coefficients ( R 2 ) are close to unity. It was found that sulfides could be successfully extracted from n-hexane by NMP solvent companying with the extraction of aromatics. However, the separation factors and distribution coefficients of the sulfides are greater than those of aromatics, indicating that the sulfides are more easily extracted by NMP. Furthermore, the separation energies of the sulfides are greater than that of aromatics, which is also a piece of evidence for easier separation of sulfides. In order to extend those results to other extraction processes involving those sulfides, aromatics and solvent, the binary interaction parameters of the NRTL and UNIQUAC thermodynamic models were calculated by correlating the LLE data. The RMSD values were all <0.0070, and a graphical user interface based on the Gibbs tangent plane test was also applied to validate the coherent consistency of the parameters. The results show that the obtained binary interaction parameters could be reliable adopted in the design and optimization of the related extraction/separation process in industry.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Xing Zhang,Xiao Liu,Shuhuan Lin,Xiaoli Zhu,Ziye Zhang,Baoshou Shen,Shi Zhou
Immobilization technology is a promising way to improve effectiveness and stability of microbial remediation for polycyclic aromatic hydrocarbons (PAHs), in which carrier material is one of key factors restricting removal efficiency. In this study, fulvic acid-wheat straw biochar (FA/WS) composites were applied for immobilization of an efficient PAHs degrading bacterium Stenotrophomonas maltophilia (SPM). FA/WS&SPM showed superior degradation capacity than free bacteria and biochar-immobilized bacteria, with the removal efficiency of pyrene (20 mg L -1 ) reaching 90.5 % (7 days). Transcriptome analysis revealed that FA in the carrier materials can promote transportation and degradation of pyrene, and cell growth, as well as inhibit cell apoptosis. Enzyme activity and degradation products detection showed that SPM utilized both phthalic acid and salicylic acid metabolic pathways to degrade pyrene. Practicality of FA/WS&SPM for different kinds of PAHs remediation had been verified in contaminated soil, demonstrating a great potential in the field of PAHs polluted sites remediation.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Industrial Chemistry & Materials
·
2023
·
IF 0
Jun Han,Wenrou Tian,Ye Miao,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jianmei Lu
Coupling the effects of flexoelectricity with piezoelectricity has been proved to effectively harvest mechanical energy. In this study, a composition-graded core–shell structure (HAP@FAP) was prepared by surface-gradient F-doping in hydroxyapatite, which could introduce flexoelectricity by a built-in strain gradient. A flexoelectric-boosted piezoelectric response was demonstrated by piezoresponse force microscopy (PFM) characterization, showing that the piezoelectric constant of HAP@FAP was increased by 2.25 times via a lattice strain gradient induced by chemical heterogeneities derived from the unique composition-graded core–shell structure. Thus, the piezocatalytic activity of HAP@FAP for phenanthrene (PHE) degradation in soil was enhanced. This work provides a new strategy for the modification of piezoelectric catalysts for the remediation of organics-contaminated soils on industrial land.
研究领域:
材料科学
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环境科学
·
物理化学
✓ 已验证
DOI
MAIN GROUP CHEMISTRY
·
2020
·Vol. 19
·期 2
·117-124
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IF 0.845
Zhao Xue-Yan,Shi Yan-Shu,Pang Mao-Lin,Zhang Wei-Na,Li Yun-Hui
The controllable synthesis of MOF materials is of great significance for its application. At present, the regulation of MOF morphology is mainly limited to those composed of transition metal elements, such as IRMOF, ZIF-8, HKUST-1, UiO-66, and MIL-MOFs etc, and few reports about the fabrication of micro/nano sized lanthanide MOFs could be found in literature. In this paper, micron sized Eu-1,4-NDC-fcu-MOF octahedral particles were obtained via a modified solvothermal method by using methylamine as a modulator. The luminous efficiency of Eu3+ was greatly improved due to the efficient energy transfer from the 1,4-NDC ligand to rare earth ion. The resultant Eu-1,4-NDC-fcu-MOFs particles could be used to detect benzidine in ethanol solution effectively, and as the concentration of benzidine increased, the fluorescence intensity of Eu-1,4-NDC-fcu-MOFs gradually decreased. Due to the good stability, high luminescent intensity and excellent sensitivity, this work further demonstrates that Ln-MOF are ideal fluorescent probes to identify specific molecules.
研究领域:
材料科学
·
化学工程
·
分析化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-11
·
IF 5.3
Zhou Binbin,Li Xinyi,Xie Hao,Sheng Xingxin,Huang Lijun,Zhu Yongbo,Liang Meng,Zhong Ming
A novel molecular-imprinted electrochemical sensor for 3,4-benzopyrene (3, 4-BaP) in food samples, with high sensitivity and selective detection, is introduced. Firstly, graphene oxide was modified onto a glassy carbon electrode (GCE) by electroreduction deposition to form an RGO/GCE sensing platform, thereby enhancing the sensitivity and stability of the sensor. Then, magnetic molecularly imprinted polymer-zeolite imidazole framework-8 (MMIP-ZIF-8) was synthesized in one step using the crystal growth method and modified onto RGO/GCE, endowing the sensor with good adsorption capacity and selectivity. The performance of the sensor for 3, 4-BaP was studied using differential pulse voltammetry (DPV), and the detection conditions of the constructed sensor were optimized. The results showed that under the optimal conditions, the constructed sensor exhibited a wide linear range (0.5 ~ 1000 nmol L −1 ), a low limit of detection (0.16 nmol L −1 ), and good selectivity and stability for the detection of 3, 4-BaP. It also showed a good recovery (99.74 ~ 102.58%) for the detection of 3, 4-BaP in actual corn meal samples. The MMIP-ZIF-8/RGO/GCE sensor developed has potential application prospects in the precise detection of 3, 4-BaP in food. Graphical
研究领域:
分析化学
·
食品科学
✓ 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）