Removal of Tetracycline in Sewage and Dairy Products with High-Stable MOF

Serious environmental and human health problems caused by the abuse of antibiotics have attracted worldwide concern. Recently, metal–organic frameworks (MOFs) with high porosity have drawn wide attention for their effects in the adsorption and removal of pollutants from complex matrices. Herein, a high-stable metal organic framework (MOF), i.e., ((ZnCl2)3(L)2·DMF)n, where L=1,3,5-tris((pyridin-4-ylthio)methyl)benzene), MOF 1, was applied to adsorb and remove tetracycline from sewage and dairy products. The results showed that MOF 1 exhibited a strong performance in the adsorption of tetracycline. The effects of initial pH values, adsorbent dose, contact time and ionic strength of the adsorption performance of MOF 1 were investigated. The adsorption kinetics best fit the pseudo-second order model, and the adsorption isotherms matched the Langmuir adsorption model well. It was indicated that both chemical adsorption and physical adsorption play an important role in the adsorption process, and the adsorption of tetracycline was homogeneous and occurred on a monolayer on the surface of MOF 1. Additionally, the stability of MOF 1 and the details of the adsorption mechanism were also investigated. Thus, this study provides a new candidate for the application of MOFs-based adsorbents in the removal of antibiotics from sewage and dairy products.

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Adsorption of azo dyes from aqueous solution by the hybrid MOFs/GO

Water Science & Technology ◽

10.2166/wst.2016.009 ◽

2016 ◽

Vol 73 (7) ◽

pp. 1728-1737 ◽

Cited By ~ 20

Author(s):

Ling Li ◽

Zhennan Shi ◽

Hongyang Zhu ◽

Wei Hong ◽

Fengwei Xie ◽

...

Keyword(s):

Aqueous Solution ◽

Azo Dyes ◽

Metal Organic Framework ◽

Freundlich Isotherm ◽

Order Kinetic ◽

Sunset Yellow ◽

Order Kinetic Model ◽

Metal Organic ◽

Pseudo Second Order ◽

The Stability

In this work, a hybrid of chromium(III) terephthalate metal organic framework (MIL-101) and graphene oxide (GO) was synthesized and its performance in the removal of azo dyes (Amaranth, Sunset Yellow, and Carmine) from water was evaluated. The adsorption for azo dyes on MIL-101/GO was compared with that of MIL-101, and it was found that the addition of GO enhanced the stability of MIL-101 in water and increased the adsorption capacity. The maximum adsorption capacities of MIL-101/GO were 111.01 mg g−1 for Amaranth, 81.28 mg g−1 for Sunset Yellow, and 77.61 mg g−1 for Carmine. The adsorption isotherms and kinetics were investigated, showing that the adsorption fits the Freundlich isotherm and the pseudo-second-order kinetic model. The recyclability of MIL-101/GO was shown by the regeneration by acetone. The high adsorption capability and excellent reusability make MIL-101/GO a competent adsorbent for the removal dyes from aqueous solution.

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Adsorption Properties of Comb-Shaped Polycarboxylate Dispersant onto Different Crystal Pyraclostrobin Particle Surfaces

Molecules ◽

10.3390/molecules25235637 ◽

2020 ◽

Vol 25 (23) ◽

pp. 5637

Author(s):

Liying Wang ◽

Chong Gao ◽

Jianguo Feng ◽

Yong Xu ◽

Danqi Li ◽

...

Keyword(s):

Physical Adsorption ◽

Order Kinetic ◽

Adsorption Model ◽

Adsorption Models ◽

Crystal Forms ◽

Adsorption Processes ◽

Different Temperatures ◽

Pseudo Second Order ◽

The Stability ◽

Crystalline Forms

The stability of the suspension system of the two crystal forms of pyraclostrobin is evaluated using multiple light technology, and the adsorption performance of polycarboxylate dispersant on the surface of two different crystalline pyraclostrobin particles is compared in combination with XRD, FTIR, XPS, and SEM from the microscopic view. The adsorption kinetics and thermodynamics studies of 2700 on the surfaces of different crystalline forms of pyraclostrobin particles show that the adsorption process of 2700 on the surfaces of pyraclostrobin crystal forms II and IV conform to pseudo-second-order kinetic adsorption model. The Ea values for crystal forms II and IV are 12.93 and 14.39 kJ∙mol−1, respectively, which indicates that both adsorption processes are physical adsorption. The adsorption models of 2700 on the surfaces of pyraclostrobin crystal forms II and IV are in accordance with Langmuir adsorption isotherms. The ∆Gad values of crystal forms II and IV are negative and the ∆Sad values are positive at different temperatures. Therefore, the adsorption processes are spontaneous and accompanied by entropy increase. The results of this study provide an important theoretical basis for the selection of polycarboxylate dispersants in the suspension of pyraclostrobin. This study also provides a reference for the research of polycrystalline pesticide suspension concentrate.

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Functional Metal Organic Framework/SiO2 Nanocomposites: From Versatile Synthesis to Advanced Applications

Polymers ◽

10.3390/polym11111823 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1823 ◽

Cited By ~ 6

Author(s):

Mengyu Ma ◽

Liangyu Lu ◽

Hongwei Li ◽

Yuzhu Xiong ◽

Fuping Dong

Keyword(s):

Structural Characteristics ◽

Metal Organic Framework ◽

High Specific Surface Area ◽

Inorganic Materials ◽

High Porosity ◽

Active Metal ◽

Metal Organic ◽

Sio2 Nanocomposites ◽

And Performance ◽

The Stability

Metal organic frameworks (MOFs), also called porous coordination polymers, have attracted extensive attention as molecular-level organic-inorganic hybrid supramolecular solid materials bridged by metal ions/clusters and organic ligands. Given their advantages, such as their high specific surface area, high porosity, and open active metal sites, MOFs offer great potential for gas storage, adsorption, catalysis, pollute removal, and biomedicine. However, the relatively weak stability and poor mechanical property of most MOFs have limited the practical application of such materials. Recently, the combination of MOFs with inorganic materials has been found to provide a possible strategy to solve such limitations. Silica, which has excellent chemical stability and mechanical properties, shows great advantages in compounding with MOFs to improve their properties and performance. It not only provides structured support for MOF materials but also improves the stability of materials through hydrophobic interaction or covalent bonding. This review summarizes the fabrication strategy, structural characteristics, and applications of MOF/silica composites, focusing on their application in chromatographic column separation, catalysis, biomedicine, and adsorption. The challenges of the application of MOF/SiO2 composites are addressed, and future developments are prospected.

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Metal-Organic Framework Transistors for Dopamine Sensing

Materials Chemistry Frontiers ◽

10.1039/d1qm00118c ◽

2021 ◽

Author(s):

Jiajun Song ◽

Jianzhong Zheng ◽

Anneng Yang ◽

Hong Liu ◽

Zeyu Zhao ◽

...

Keyword(s):

Charge Transport ◽

Transport Properties ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

High Porosity ◽

Two Dimensional ◽

Metal Organic ◽

Organic Framework

Two-dimensional (2D) conductive metal-organic frameworks (MOFs) can not only inherit the high porosity and tailorability of traditional MOFs but also exhibit unique charge transport properties, offering promising opportunities for applications...

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Highly stable metal-organic framework UiO-66-NH2 for high-performance triboelectric nanogenerators

Nanotechnology ◽

10.1088/1361-6528/ac32f8 ◽

2021 ◽

Author(s):

Yong-Mei Wang ◽

Xinxin Zhang ◽

Dingyi Yang ◽

Liting Wu ◽

Jiaojiao Zhang ◽

...

Keyword(s):

High Performance ◽

Metal Organic Framework ◽

High Surface ◽

High Surface Area ◽

Triboelectric Nanogenerator ◽

High Porosity ◽

Chemically Modified ◽

Metal Organic ◽

Triboelectric Nanogenerators ◽

Organic Framework

Abstract The high porosity, controllable size, high surface area, and chemical versatility of a metal-organic framework (MOF) enable it a good material for a triboelectric nanogenerator (TENG), and some MOFs have been incorporated in the fabrication of TENGs. However, the understanding of effects of MOFs on the energy conversion of a TENG is still lacking, which inhibits the improvement of the performance of MOF-based TENGs. Here, UiO-66-NH2 MOFs were found to significantly increase the power of a TENG and the mechanism was carefully examined. The electron-withdrawing ability of Zr-based UiO-66-family MOFs was enhanced by designing the amino functionalized 1,4-terephthalic acid (1,4-BDC) as ligand. The chemically modified UiO-66-NH2 was found to increase the surface roughness and surface potential of a composite film with MOFs embedded in polydimethylsiloxane (PDMS) matrix. Thus the total charges due to the contact electrification increased significantly. The composite-based TENG was found to be very durable and its output voltage and current were 4 times and 60 times higher than that of a PDMS-based TENG. This work revealed an effective strategy to design MOFs with excellent electron-withdrawing abilities for high-performance TENGs.

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Study of UiO-66 and UiO-66 Modulated with Acetic Acid as the Adsorbent for Eriochrome Black T Dye

Indo J Chem Res ◽

10.30598//ijcr.2021.8-riz ◽

2021 ◽

Vol 8 (3) ◽

pp. 183-193

Author(s):

M. Anugrah Rizky Pambudi ◽

Nanda Prayogo ◽

Muhammad Nadjib ◽

Ratna Ediati

Keyword(s):

Acetic Acid ◽

Reaction Rate ◽

Metal Organic Framework ◽

X Ray Diffraction ◽

Adsorption Selectivity ◽

X Ray ◽

Langmuir Adsorption ◽

Eriochrome Black T ◽

Metal Organic ◽

Pseudo Second Order

UiO-66, as one of the metal-organic framework (MOF) compounds, has been used to treat some anionic and cationic dye waste. In order to determine the adsorption selectivity decisively, the synthesis of UiO-66 and UiO-66 modulated with acetic acid had been carried out, along with their adsorption tests for Eriochrome Black T (EBT) dye solution. The synthesis was performed by utilizing a solvothermal method with the reaction mixtures of zirconium (IV) chloride (ZrCl4) and terephthalic acid (H2BDC) as a ligand heated at 120 oC for 24 hours. Both UiO-66 (without acetic acid) and acetic acid modulated UiO-66 were obtained as a white powder. Acetic acid as a modulator was added and being investigated for the adsorption capability compared to the normal UiO-66. This study showed that normal UiO-66 exhibited better adsorption than acetic acid modulated UiO-66 with a mmol ratio of acetic acid:ligand varied from 50:1, 100:1, and 150:1. Acetic acid modulated UiO-66 with a mmol ratio of 50 exhibited the best crystallinity as observed by using x-ray diffraction. It can be concluded that the adsorption of EBT using normal and acetic acid modulated UiO-66 obeyed the pseudo-second-order reaction rate law as well as the Langmuir adsorption isotherm pattern.

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Stable artificial solid electrolyte interphase films for lithium metal anode via metal–organic frameworks cemented by polyvinyl alcohol

Journal of Materials Chemistry A ◽

10.1039/c9ta10405d ◽

2020 ◽

Vol 8 (1) ◽

pp. 251-258 ◽

Cited By ~ 13

Author(s):

Lishuang Fan ◽

Zhikun Guo ◽

Yu Zhang ◽

Xian Wu ◽

Chenyang Zhao ◽

...

Keyword(s):

Polyvinyl Alcohol ◽

Metal Organic Framework ◽

Solid Electrolyte Interphase ◽

Lithium Metal ◽

Metal Anode ◽

Lithium Metal Anode ◽

Sei Film ◽

Metal Organic ◽

Li Metal Anode ◽

The Stability

Polyvinyl alcohol (PVA) as a “glue” to cement the metal organic framework (Zn-MOF) sheet as a reasonable artificial SEI film. The artificial SEI film can efficiently adapt to the changes of the volume during the cycle, significantly improve the stability of the Li metal anode.

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Combined Minimum-Run Resolution IV and Central Composite Design for Optimized Removal of the Tetracycline Drug Over Metal–Organic Framework-Templated Porous Carbon

Molecules ◽

10.3390/molecules24101887 ◽

2019 ◽

Vol 24 (10) ◽

pp. 1887 ◽

Cited By ~ 18

Author(s):

Thuan Van Tran ◽

Duyen Thi Cam Nguyen ◽

Hanh T. N. Le ◽

Long Giang Bach ◽

Dai-Viet N. Vo ◽

...

Keyword(s):

Central Composite Design ◽

Removal Efficiency ◽

Metal Organic Framework ◽

Response Surfaces ◽

Diagnostic Plots ◽

Initial Ph ◽

Metal Organic ◽

Ph Level ◽

Central Composite ◽

Organic Framework

In this study, a minimum-run resolution IV and central composite design have been developed to optimize tetracycline removal efficiency over mesoporous carbon derived from the metal-organic framework MIL-53 (Fe) as a self-sacrificial template. Firstly, minimum-run resolution IV, powered by the Design–Expert program, was used as an efficient and reliable screening study for investigating a set of seven factors, these were: tetracycline concentration (A: 5–15 mg/g), dose of mesoporous carbons (MPC) (B: 0.05–0.15 g/L), initial pH level (C: 2–10), contact time (D: 1–3 h), temperature (E: 20–40 °C), shaking speed (F: 150–250 rpm), and Na+ ionic strength (G: 10–90 mM) at both low (−1) and high (+1) levels, for investigation of the data ranges. The 20-trial model was analyzed and assessed by Analysis of Variance (ANOVA) data, and diagnostic plots (e.g., the Pareto chart, and half-normal and normal probability plots). Based on minimum-run resolution IV, three factors, including tetracycline concentration (A), dose of MPC (B), and initial pH (C), were selected to carry out the optimization study using a central composite design. The proposed quadratic model was found to be statistically significant at the 95% confidence level due to a low P-value (<0.05), high R2 (0.9078), and the AP ratio (11.4), along with an abundance of diagnostic plots (3D response surfaces, Cook’s distance, Box-Cox, DFFITS, Leverage versus run, residuals versus runs, and actual versus predicted). Under response surface methodology-optimized conditions (e.g., tetracycline concentration of 1.9 mg/g, MPC dose of 0.15 g/L, and pH level of 3.9), the highest tetracycline removal efficiency via confirmation tests reached up to 98.0%–99.7%. Also, kinetic intraparticle diffusion and isotherm models were systematically studied to interpret how tetracycline molecules were absorbed on an MPC structure. In particular, the adsorption mechanisms including “electrostatic attraction” and “π–π interaction” were proposed.

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Efficient Removal of Cd(II) Using SiO2-Mg(OH)2 Nanocomposites Derived from Sepiolite

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17072223 ◽

2020 ◽

Vol 17 (7) ◽

pp. 2223 ◽

Cited By ~ 2

Author(s):

Zhendong He ◽

Bozhi Ren ◽

Andrew Hursthouse ◽

Zhenghua Wang

Keyword(s):

Ph Value ◽

Physical Adsorption ◽

Structural Characteristics ◽

Contaminated Water ◽

Adsorption Model ◽

X Ray Diffraction ◽

Base Modification ◽

Pseudo Second Order ◽

Polluted Wastewater ◽

Cd Species

The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water, we characterized uptake on a recently identified nanomaterial (SiO2-Mg(OH)2) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO2-Mg(OH)2 were analyzed by means of SEM-EDS, Fourier Transform Infra-Red Spectroscopy (FTIR) and Powder X-ray Diffraction (PXRD). Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO2-Mg(OH)2. The results show that the pore structure of SiO2-Mg(OH)2 is well developed, with specific surface area, pore size and pore volume increased by 60.09%, 16.76%, and 43.59%, respectively, compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298 K, the maximum saturated adsorption capacity fitted by Sips model of SiO2-Mg(OH)2 regarding Cd(II) is 121.23 mg/g. The results show that SiO2-Mg(OH)2 nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.

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