scholarly journals Facile Fabrication of Novel NiFe2O4@Carbon Composites for Enhanced Adsorption of Emergent Antibiotics

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6710
Author(s):  
Van Tan Lam ◽  
Thi Cam Quyen Ngo ◽  
Long Giang Bach
Keyword(s):  
Metal Organic Framework ◽  
Pharmaceutical Drugs ◽  
Optimum Conditions ◽  
Solution Ph ◽  
Antibiotic Drugs ◽  
Metal Organic ◽  
Facile Fabrication ◽  
Permissible Levels ◽  
Enhanced Adsorption ◽  
Quadratic Models

Water purification is becoming one of the most pertinent environmental issues throughout the world. Among common types of water pollution involving heavy metals, pharmaceutical drugs, textile dyes, personal care products, and other persistent organic pollutants, the pollution of antibiotic drugs is increasingly emerging due to their adverse effects on microorganisms, aquatic animals, and human health. Therefore, the treatment of such contaminants is very necessary to reduce the concentration of antibiotic pollutants to permissible levels prior to discharge. Herein, we report the use of NiFe2O4@C composites from a bimetallic-based metal-organic framework Ni-MIL-88B(Fe) for removal of ciprofloxacin (CFX) and tetracycline (TCC). The effect of production temperatures (600–900 °C), solution pH (2–10), NiFe2O4@C dose (0.05–0.2 g/L), concentration of antibiotics (10–60 mg/L), and uptake time (0–480 min) was investigated systematically. Response surface methodology and central composite design were applied for quadratic models to discover optimum conditions of antibiotic adsorption. With high coefficients of determination (R2 = 0.9640–0.9713), the proposed models were significant statistically. Under proposed optimum conditions, the adsorption capacity for CFX and TCC were found at 256.244, and 105.38 mg/g, respectively. Recyclability study was employed and found that NiFe2O4@C-900 could be reused for up to three cycles, offering the potential of this composite as a good adsorbent for removal of emergent antibiotics.

scholarly journals Quinone-modified metal-organic frameworks MIL-101(Fe) as heterogeneous catalysts of persulfate activation for degradation of aqueous organic pollutants

2019 ◽  
Vol 79 (12) ◽  
pp. 2357-2365 ◽  
Author(s):  
Huaisu Guo ◽  
Weilin Guo ◽  
Yang Liu ◽  
Xiaohua Ren
Keyword(s):  
Photoelectron Spectroscopy ◽  
Heterogeneous Catalysts ◽  
Electrochemical Impedance ◽  
Metal Organic Framework ◽  
Optimum Conditions ◽  
X Ray Diffraction ◽  
Heterogeneous Fenton ◽  
X Ray ◽  
Metal Organic ◽  
Persulfate Activation

Abstract In this work, quinone-modified metal-organic framework MIL-101(Fe)(Q-MIL-101(Fe)), as a novel heterogeneous Fenton-like catalyst, was synthesized for the activation of persulfate (PS) to remove bisphenol A (BPA). The synthetic Q-MIL-101(Fe) was characterized via X-ray diffraction, scanning electron microscope, Fourier transform infrared, electrochemical impedance spectroscopy, cyclic voltammetry and X-ray photoelectron spectroscopy. As compared to the pure MIL-101(Fe), Q-MIL-101(Fe) displayed better catalytic activity and reusability. The results manifested that the Q-MIL-101(Fe) kept quinone units, which successfully promoted the redox cycling of Fe3+/Fe2+ and enhanced the removal efficiency. In addition, the reaction factors of Q-MIL-101(Fe) were studied (e.g. pH, catalyst dosage, PS concentration and temperature), showing that the optimum conditions were [catalyst] = 0.2 g/L, [BPA] = 60 mg/L, [PS] = 4 mmol/L, pH = 6.79, temperature = 25 °C. On the basis of these findings, the probable mechanism on the heterogeneous activation of PS by Q-MIL-101(Fe) was proposed.

Facile fabrication of magnetically recyclable metal–organic framework nanocomposites for highly efficient and selective catalytic oxidation of benzylic C–H bonds

2014 ◽  
Vol 50 (61) ◽  
pp. 8374-8377 ◽  
Author(s):  
Yifa Chen ◽  
Xianqiang Huang ◽  
Xiao Feng ◽  
Jikun Li ◽  
Yingyu Huang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Metal Organic Framework ◽  
Highly Efficient ◽  
Selective Catalytic Oxidation ◽  
Metal Organic ◽  
Facile Fabrication ◽  
Organic Framework

Chemically-bonded HKUST-1@Fe3O4 shows exceptional activity for the oxidation of benzylic C–H bonds.

scholarly journals Green synthesis of Zr-based metal–organic framework hydrogel composites and their enhanced adsorptive properties

2020 ◽  
Vol 7 (24) ◽  
pp. 4813-4821
Author(s):  
Shirell E. Klein ◽  
Joshua D. Sosa ◽  
Alexander C. Castonguay ◽  
Willmer I. Flores ◽  
Lauren D. Zarzar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Green Chemistry ◽  
Green Synthesis ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Hydrogel Composites ◽  
Enhanced Adsorption ◽  
Adsorptive Properties ◽  
Organic Framework

A Zr-MOF-hydrogel hybrid synthesized using a green chemistry approach exhibited enhanced adsorption for methylene blue compared with the constituent materials.

Understanding gas adsorption in MOF-5/graphene oxide composite materials

2017 ◽  
Vol 19 (18) ◽  
pp. 11639-11644 ◽  
Author(s):  
Li-Chiang Lin ◽  
Dooam Paik ◽  
Jihan Kim
Keyword(s):  
Graphene Oxide ◽  
Composite Materials ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Oxide Composite ◽  
Metal Organic ◽  
Enhanced Adsorption ◽  
Organic Framework

Metal–organic framework (MOF) and graphene oxide (GO) composite materials (MOF/GO) have been regarded as promising for separation applications due to their synergistically enhanced adsorption properties.

scholarly journals Facile Fabrication of Amino-Functionalized MIL-68(Al) Metal-organic Framework for Effective Adsorption of Arsenate (As(V))

2022 ◽  
Author(s):  
Alireza Rahmani ◽  
Amir Shabanloo ◽  
Solmaz Zabihollahi ◽  
Mehdi Salari ◽  
Mostafa Leili ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Quadratic Model ◽  
System Response ◽  
P Value ◽  
Order Kinetic ◽  
Solution Ph ◽  
Metal Organic ◽  
Organic Framework

Abstract An amino-functionalized MIL-68(Al) metal-organic framework (amino-MIL-68(Al) MOF) was synthesized by solvothermal method and then characterized by FESEM, XRD, FTIR, EDX-mapping, and BET-BJH techniques. In order to predict arsenate (As(V)) removal, a robust quadratic model (R2 > 0.99, F-value = 2389.17 and p-value < 0.0001) was developed by the central composite design (CCD) method and then the genetic algorithm (GA) was utilized to optimize the system response and four independent variables. The results showed that As(V) adsorption on MOF was affected by solution pH, adsorbent dose, As(V) concentration and reaction time, respectively. Predicted and experimental As(V) removal efficiencies under optimal conditions were 99.45 and 99.87 %, respectively. The fitting of experimental data showed that As(V) adsorption on MOF is well described by the nonlinear form of the Langmuir isotherm and pseudo-second-order kinetic. At optimum pH 3, the maximum As(V) adsorption capacity was 74.29 mg/g. Thermodynamic studies in the temperature range of 25 to 50 °C showed that As(V) adsorption is a spontaneous endothermic process. The reusability of MOF in ten adsorption/regeneration cycles was studied and the results showed high reusability of this adsorbent. The highest interventional effect in inhibiting As(V) adsorption was related to phosphate anion. The results of this study showed that amino-MIL-68(Al) can be used as an effective MOF with a high surface area (> 1000 m2/g) and high reusability for As(V)-contaminated water.

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