INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Fuhua Wei,Fang Lan,Qinhui Ren,Hongliang Chen,Yutao Zhang,Zhao Liang
The Y/Cr-MOFs were synthesized via solvothermal treatment using 1, 3, 5-benzoic acid as the organic ligand and yttrium acetate hydrate and chromium acetate as the metal ions. The structures of the prepared Y/Cr-MOFs were characterized using FT-IR, XRD, TG, and SEM techniques. These characterized Y/Cr-MOFs were employed to investigate the adsorption efficiency of minocycline. Experimental findings indicate that minocycline adsorption by Y/Cr-MOFs follows both the second-order kinetic model and Freundlich isotherm. Within a span of 5 h, up to 90.4 % of minocycline can be adsorbed by Y/Cr-MOFs at pH 6. Moreover, a maximum removal capacity of minocycline reaching 506 mg/g was achieved with Y/Cr-MOFs. These results demonstrate the practical application potential of utilizing Y/Cr-MOFs for efficient minocycline adsorption.
研究领域:
环境科学
·
材料科学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Ruyue Guo,Jiayuan Chang,Huayi Li,Jie He,Peng Pan,Zhengchun Yang,Jun Wei
A core–shell structure that can achieve effective adsorption of methyl orange (MO) can be prepared by using 26-facet Cu 2 O as a template for producing copper using a reducing agent. However, there are insufficient studies on this topic. Therefore, in this study, Cu 2 O@Cu composites were synthesized using a two-step liquid-phase reduction method. MO was used as a pollutant to test the adsorption properties of the materials. The adsorption experiments showed that the adsorption process followed pseudo-first-order kinetic and Freundlich isotherm. The maximum capacity of the adsorbent was 498 mg/g, and the adsorption occurred via spontaneous and exothermic physical adsorption. By the comparison of adsorbent before and after adsorption, it was found that the content of Cu + decreased and that of CuO increased, indicating that the material was oxidized during the adsorption process. Further, FTIR spectroscopy and zeta potential showed that the adsorption mechanism was the electrostatic attraction between positively charged adsorbent and the sulfonic acid group of the MO. Therefore, the porous core-shell structure and the positively charged adsorbent facilitated the adsorption of anionic dyes. 1 TD can be used as an effective adsorbent for MO.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Dongliang Yang,Feipeng Cheng,Le Chang,Dengfeng Wu
Developing efficient and low-cost adsorbent for removing heavy metal ions from aqueous solution is of great significance for environmental protection. Herein, low quality natural bentonite was purified and sodium-modified to adsorb Pb 2+ from the aqueous phase. The effects of initial pH value of the solution, type and amount of the adsorbent, contact time and initial Pb 2+ concentration on the adsorption performance of sodium bentonite were systematically studied. The adsorption efficiency of sodium bentonite was significantly better than that of purified bentonite and natural bentonite toward Pb 2+ . Under the optimum adsorption conditions of pH = 5, adsorbent dosage of 0.2 g, initial Pb 2+ concentration of 400 mg/L, and adsorption time of 120 min, sodium bentonite can remove more than 99.94% of Pb 2+ . Adsorption behavior fitted well with Freundlich isotherm and pseudo-second-order kinetics adsorption equations. Adsorption process was endothermic and feasible. The adsorption pathways of Pb 2+ on sodium bentonite are mainly including ion exchange, surface hydroxyl functional group capture, electrostatic attraction and chemical precipitation by CO 3 2- in the pore channel to form PbCO 3 . This research is anticipated to give technical support for prompting the wider application of bentonite as an adsorbent material.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 8
·1147-1155
·
IF 1.87
Habimana Fabien,Huo Yanxia,Jiang Sai,Ji Shengfu
Europium metal organic framework (Eu-MOF) was synthesized using Europium as metal ion center and 1,3,5-trimesic acid (H 3 BTC) as organic ligand under hydrosolvothermal conditions. The dynamic performance of the Eu-MOF material in adsorption desulfurization processes was investigated using a solution of thiophene/n-octane as sulfur containing quality model oil. The adsorption desulfurization kinetics equations and adsorption desulfurization isotherms of Eu-MOF were also studied. The results have shown that Eu-MOF catalyst has very good adsorption desulfurization abilities under optimum desulfurization conditions of m adsorbent : m model oil ratio of 1:100 and reaction temperature of 303 K. After 4 h of desulfurization reaction, the adsorption rate and the adsorption desulfurization capacity has reached 64.70% and 24.59 mgS/gMOF respectively. The Eu-MOF adsorption desulfurization process of thiophene on Eu-MOF fits well the quasi two level dynamic model using Langmuir isotherm, Freundlich isotherm and Dubinin–Radushkevich isotherm equations. The Dubinin–Radushkevich isotherm can be a suitable description of adsorption process for Eu-MOF absorbent on thiophene/n-octane mode oil. However the Freundlich isotherm equation model with fitting R
2 value closer to 1, can be a better description for the adsorption of thiophene. The adsorption of thiophene over Eu-MOF absorbent has two types of adsorption that occur simultaneously. These are the monolayer physical adsorption and the multilayer chemical adsorption.
研究领域:
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2014
·
IF 1.611
Lu Zeng,Ligang Yang,Shuping Wang,Kai Yang
Different crystalline calcium silicate hydrates (CSH) were synthesized under specific hydrothermal conditions and several methods were used to analyze samples. Amorphous calcium silicate hydrates (ACSH) mainly consists of disordered calcium silicate hydrate gel (C-S-H gel) and crystalline calcium silicate hydrates (CCSH) consists of crystallized tobermorite. The adsorption of carcinogenic aflatoxin B1 (AFB1) onto ACSH and CCSH was investigated. The adsorption kinetics was studied using pseudo-first-order and pseudo-second-order kinetic models and intraparticle diffusion model. The pseudo-second-order model provided the best correlation and the intraparticle diffusion controlled the adsorption process of AFB1 onto CCSH. Adsorption isotherm parameters were obtained from Langmuir and Freundlich and the adsorption data fitted to Freundlich much better. Based on the results of N2 adsorption/desorption, adsorption kinetics, and adsorption isotherms, the adsorption mechanism of AFB1 onto CCSH was developed. All results indicate that CCSH has a great potential to be a safe, easy-made, and cost-effective material for the control of AFB1 contamination.
研究领域:
食品科学
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环境工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2020
·Vol. 147
·期 1
·04020142
·
IF 1.264
Yuefeng Qiu,Liming Kong,Tonghe Chen,Qin Xu
Cu+-modified SBA-15 (Cu+/SBA-15, SBA-15 refers well-ordered hexagonal mesoporous silica) was prepared for adsorption of tetracycline (TC) by the pH adjusting reduction method. Some Cu+ species (Cu2O) are aggregated on the outside surface of SBA-15, and the other Cu+ species are highly dispersed in SBA-15 via ≡Si-O-Cu. Its adsorption mechanism was firstly studied via comparison with CuO/SBA-15. The TC adsorption kinetic of Cu+/SBA-15 fitted the pseudo-second-order model well. The adsorption isotherms at 293, 303, and 313 K were determined and modeled with Langmuir and Freundlich equations, and the Qmax of Cu+/SBA-15 for TC calculated from Langmuir model could reach 961.54 mg/g at 313 K. Its good adsorption performance for TC is associated with the high surface area of SBA-15, highly dispersed Cu+ species, and mesoporous structure. The adsorption of Cu+/SBA-15 for TC is an endothermic process, and adsorption heat is 66.88 kJ·mol−1, which implies that the adsorption process of Cu+/SBA-15 for TC is weak chemisorption. The adsorption mechanism of Cu+/SBA-15 was mainly explored via comparing with CuO/SBA-15 by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectroscopy analysis. Besides the coordination complexation of Cu+ with NH2 radical of TC, the π-complexation between Cu+, and the benzene ring of TC improved the adsorption capacity of Cu+/SBA-15 for TC comparing with CuO/SBA-15 and showed a dominant role for TC adsorption.
研究领域:
环境科学
·
材料科学
·
化学工程
·
分析化学
✓ 已验证
DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2021
·
IF 4.508
Jingbao Wang,Jing Jing,Li Feng,Hailin Zhu,Zhiyong Hu,Xuemei Ma
The corrosion inhibition behavior and adsorption mechanism of three novel synthetic surfactants in 1 M HCl solution on carbon steel were investigated. The PP results confirmed that all the synthetic surfactants behave as mixed-type inhibitors, while the EIS results validated the existence of a protective layer by the adsorption of inhibitor molecules on the carbon surface. T 3 was observed to offer the highest inhibition efficiency ( η w , 96.28%) at 1 mM by the static weight loss measurements due to two different hydrophobic chains which form a more compact film with the crosswise arrangement. SEM/EDS and XPS results revealed the formation of the surfactants film on the carbon steel surface. Molecular dynamics simulation (MD) was further executed to determine the adsorption mechanism in molecular level insights. In addition, a linear correlation between surface activity ( γ ) and corrosion inhibition efficiency ( η w ) was verified. The adsorption of the prepared surfactants followed the Freundlich isotherm at different concentration ranges. Moreover, the bilayer/multilayer adsorption mechanism was also proposed and confirmed by experimental, adsorption isotherm studies and MD. Hence, both MD simulations and experimental results revealed the analogous inhibition with the order follows: T 3 > T 2 > T 1 .
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qianqian Song,Jianli Liang,Yi Fang,Zhonglu Guo,Zhao Du,Lei Zhang,Zhenya Liu,Yang Huang,Jing Lin,Chengchun Tang
Contamination of aqueous environment caused by various antibiotics has attracted wide attention. It is important to find effective adsorbents for the removal of toxic compounds. Herein, Ni (II) was anchored at the surface of porous boron nitride (BN) by a facile way to enhance the adsorption performance for tetracycline (TC). The interaction between porous BN and Ni (II) was proved to be B-O-Ni bond. It is noteworthy that Ni (II) modified porous BN shows excellent removal percentage up to 99.769% for TC which far exceeds the pristine porous BN (70.853%) and most other reported adsorption materials. The maximum adsorption capacity calculated from the Langmuir model is 429.582 mg g −1 , confirming that Ni (II) modified porous BN has a remarkable performance for removing TC. In addition, the adsorption of TC onto Ni (II) modified porous BN followed pseudo-second-order kinetics and the equilibrium data fitted well with the Freundlich isotherm, revealing that chemisorption and multilayer adsorption was dominated. Finally, the results of DFT calculations further demonstrated that the effective adsorption of TC on Ni (II) modified porous BN could be ascribed to cation bridge interaction, π-π interaction, Van de Waals force and electrostatic interaction.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Yang Peng,Xiangjiang Liu,Xun Gong,Xiaomin Li,Yifu Liu,Erwei Leng,Yang Zhang
In this study, three kinds of monocarboxylic acids, formic, acetic, and propionic acids, are first applied to modified microalgae residuals (M1-RD, M2-RD, and M3-RD, respectively) after lipid extraction, aiming to enhance the adsorption capacity and selective binding ability for Hg(II) ions in simulated wastewater. The effect of pH, temperature, and initial Hg(II) concentration was investigated to identify the optimum adsorption conditions. Batch adsorption tests showed that the maximum adsorption efficiency obtained was 96.7% for M1-RD, 91.1% for M2-RD, and 84.4% for M3-RD at pH 4.05 compared to 48.5 and 57.6% for raw and residual microalgae at pH 5.01, respectively. The adsorption capacity of raw, residual, and modified microalgae increased with the increase of the temperature. Langmuir and Freundlich isotherm model tests showed that the maximum equilibrium adsorption capacity among three modified adsorbents reached 63 ± 3 mg/g for M1-RD, in contrast to 17 ± 1 and 25 ± 2 mg/g for raw and residual microalgae, respectively. The characterization of the modified sample by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller, and scanning electron microscopy showed that the fibrous structure of the algae was decomposed by carboxyl groups in organic acids involved in microalgae, resulting in a larger surface area and more binding sites. In consideration of ion interference in the actual process, a kind of actual desulfurization wastewater from a 1000 MW coal-fired power plant (Guangdong, China) was introduced in the simulated adsorption system. Verification tests in desulfurization wastewater showed that up to 96% of Hg(II) ions were removed, probably as a result of co-precipitation of mercury and other co-existing ions.
研究领域:
环境科学
·
化学工程
·
废水处理
·
材料科学
✓ 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）