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Comparative adsorption capacities of CAP antibiotic onto materials Fe3O(BDC)3 and MPCs-x, where x presents pyrolysis temperature at 600, 700, 800, and 900 °C.
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Chloramphenicol (CAP) is commonly employed in veterinary clinics, but illegal and uncontrollable consumption can result in its potential contamination in environmental soil, and aquatic matrix, and thereby, regenerating microbial resistance, and antibiotic-resistant genes. Adsorption by efficient, and recyclable adsorbents such as mesoporous carbon...
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Porous TiO2 nanotablets were fabricated by calcining the MIL-125 metal–organic framework (MOF) precursors formed by a solvothermal method. Sensing results indicated that this kind of MOF-derived TiO2 nanotablets exhibited excellent ethanol sensing properties, including high response (46.12–500 ppm), relatively low operating temperature (250 °C), an...
Citations
... In this investigation, the linear form of the Langmuir and Freundlich isotherms with two parameters was used to describe the adsorption data. [46,47] Several adsorption methods may use the Langmuir adsorption isotherm. The fundamental premise is that an adsorbate monolayer will develop on the adsorbent's outer surface and that there will be no more adsorption after that. ...
In this study, the synthesis process of TiZnPbO nanocomposite and its use for the removal of Basic Fuchsin (BF) dye from wastewater was studied. The influence of contact duration (90 min), concentration (200 mg/L), solution pH (3.0), and adsorbent dosage (0.2 g) on adsorption studies were thoroughly examined. The kinetic models (pseudo‐first‐order and pseudo‐second‐order) and isotherm models (Langmuir and Freundlich) are used to understand the adsorption mechanism and behavior of BF over adsorbents. According to the kinetic data, the models fit a pseudo‐second‐order equation which is an indication of a heterogeneous chemisorption process. The Langmuir isotherm is best fitted with R² of 0.999 and a maximum adsorption capacity of 208.33 mg/g. It was determined that the values of n for the adsorption of BF on TiZnPbO at 298 K were less than unity (n=0.516, 0.504, and 0.501). This finding showed that the BF dyes should be adsorbed on this adsorbent in a non‐parallel orientation. As for BF adsorption on TiZnPbO, the isotherm data indicated that it behaved more like a multilayer than a monolayer. The TiZnPbO adsorbent showed high recyclability at least 5 times.
... H°was found to be negative in value (− 36.41 kJ/mol) which demonstrates an exothermic adsorption system and agrees with previous reports [58,78,81,82]. Additionally, ...
The increasing presence of chloramphenicol (CAP) in aquatic environments each year has led to serious concerns regarding potential adverse effects on human health, the environment, and aquatic organisms. If CAP residues are not sufficiently removed during wastewater treatment, they can migrate into the aquatic environment and eventually end up in the food chain. Therefore, the removal of CAP from river bodies is of great importance. In this research study, a novel sodium bicarbonate (NaHCO3)-impregnated coconut husk-activated carbon (CHAC) was developed through an impregnation method for CAP removal. The introduction of NaHCO3 on the CHAC surfaces results in the formation of OH– and H2O functional groups. The presence of a hydroxyl group appears mainly due to the water molecules found in the middle layer of the adsorbent and might be due to the water molecules that are physically adsorbed. This suggests that OH– groups found on the outer layer of the NaHCO3-impregnated CHAC are the main contributors to the removal of CAP through chemical interaction and electrostatic attraction. Based on the response surface methodology approach, the best preparation conditions for activation temperature, activation time, and IR were identified to be 500 ℃, 1 h, and 0.5, respectively. The optimized CHAC was found to be homogeneous and had a mesoporous type of pores with a BET surface area of 438.2 m2/g. In the batch adsorption study, the uptake of CAP onto CHAC increased as both the initial concentration of CAP and contact time increased. In terms of the effect of solution pH, CAP removal was highest at pH 2 and lowest at pH 13. The Langmuir isotherm and pseudo-first-order (PFO) kinetic were the best-fitted models for CAP adsorption. Besides, the adsorption process was mainly governed by the film diffusion mechanism. Based on the thermodynamic study, CAP adsorption onto CHAC was found to be exothermic in nature and spontaneous.
... The optimum synthesis parameters showed that N-HPC-850-2, which was prepared at 850 0 C calcination temperature and 2:1 mass ratio, exhibited the best porous carbon to eliminate CAP from water with a q max of 742.4 mg g À1 . Zhang et al. [79] found that the adsorption of CAP by CMCHPCs was endothermic as the adsorption capacity increased from 769. 95 [104] atmosphere at 700 ℃ for 4 h [82]. The adsorption capacity of CAP by MPC700 (40.6 mg g À1 ) was approximately 4 times higher than the adsorption capacity of Fe 3 O (BDC) 3 (9.6 mg g À1 ). ...
... For CAP, the magnetic resin MA-50 had the q max (193.88 mg g À1 ) among the produced resins. Tran et al. indicated that the treatment of raw (M 3 ) steel shavings by plasma in nitrogen (N 2 ) environment (M 3 -plN 2 ) slightly improved the adsorption capacity of CAP from 2.77 to 2.92 mg g À1 [82]. Xing et al. used cornstalk biomass fiber (CF) and Fe 3 O 4 embedded chitosan (CS) to synthesis a bio-composite (CFS) for effective elimination of CAP from water [104]. ...
... The thermodynamic condition ( Table 3) for a process to be spontaneous is that DG must be negative under constant temperature and pressure, i.e., there is a decrease in Gibbs energy. DG can be negative if DH has a sufficiently large negative value as À DTS is positive, based on the equation G = H -TS. As a result, in a spontaneous adsorption process, the combination of these two elements causes DG to be negative [82]. As the adsorption process a progress, DH becomes less and less negative until it equals DTS and DG is zero. ...
Despite the carcinogenic and other adverse health effects ofchloramphenicol (CAP), it is frequently detected in different water sources (e.g., groundwater, surface water, wastewater effluents, etc.) due to ongoing, illegal, and abusive application of CAP in veterinary medicine. Although extensive research has been carried out to develop effective treatment technologies to remove the persistent CAP from aqueous mediums, yet there is no critical review of these studies to the best of our reach This review will be the first in the literature to comprehensively summarize the state-of-the-art treatment techniques for CAP removal from water. We report the removal of CAP by adsorption, biodegradation, nanoscale zerovalent iron technology (nZVI), and advanced oxidation processes (AOPs). The result shows that carbon-based adsorbents have more qmax equal 892.86 mg/g for Porous carbon material from Enteromorpha prolifera. The Langmuir- Freundlich isotherm and pseudo-second order kinetics model were reported to best describe the isotherm and kinetic model respectively. Removing the CAP via biodegradation would achieve the advantages of low operating costs, and environmental friendliness. The process of AOPs among the various treatment options can be a promising method for CAP degradation in water. This review comprehensively summarizes the state-of-the-art treatment techniques for CAP removal from water. Particularly, serving as an inclusive reference for future researchers to easily define the research gabs in the literature and plan for their future work in developing novel treatment methods to decontaminate CAP-contaminated waters.
... The energy of MD adsorption on PbO@MgZnO has been analyzed using models suggested by Ho and McKay [44][45][46][47]. The kinetics study affirmed that the adsorption of dye on PbO@MgZnO demonstrates the pseudo-second-order ( Figure 3 and Table 1) (Equations are given in Supplement File). ...
This article reports the synthesis of PbO doped MgZnO (PbO@MgZnO) by a co-precipitation method, followed by an ultrasonication process. PbO@MgZnO demonstrates a significant adsorption capability toward Magenta Dye (MD). The greatest adsorption capability was optimized by varying parameters such as pH, MD concentration, and adsorbent dose. The kinetics study illustrates that the adsorption of MD on PbO@MgZnO follows the pseudo-second-order. The isotherm study revealed that Langmuir is best fitted for the adsorption, but with little difference in the R2 value of Langmuir and Freundlich, the adsorption process cloud be single or multi-layer. The maximum adsorption capacity was found to be 333.33 mg/g. The negative ΔG refers to the spontaneity of MD adsorption on PbO@MgZnO. The steric parameters from statistical physics models also favor the multi-layer adsorption mechanism. As a function of solution temperature, the parameter n pattern has values of n = 0.395, 0.290, and 0.280 for 298, 308, and 318 K, respectively (i.e., all values were below 1). Therefore, horizontal molecule positioning and multiple locking mechanisms were implicated during interactions between MD and PbO@MgZnO active sites.
... A considerable number of works adopt linear isotherms regardless of possible inaccuracy of estimation. Conversely, some researchers solved the nonlinear isotherms and assessed their validation using function errors (Tran et al. 2019b;Yang et al. 2020a, b). This will increase the accuracy and reliability of estimations. ...
Chloramphenicol is a broad-spectrum bacterial antibiotic used against conjunctivitis, meningitis, plague, cholera, and typhoid fever. As a consequence, chloramphenicol ends up polluting the aquatic environment, wastewater treatment plants, and hospital wastewaters, thus disrupting ecosystems and inducing microbial resistance. Here, we review the occurrence, toxicity, and removal of chloramphenicol with emphasis on adsorption techniques. We present the adsorption performance of adsorbents such as biochar, activated carbon, porous carbon, metal-organic framework, composites, zeolites, minerals, molecularly imprinted polymers, and multi-walled carbon nanotubes. The effect of dose, pH, temperature, initial concentration, and contact time is discussed. Adsorption is controlled by π-π interactions, donor-acceptor interactions, hydrogen bonding, and electrostatic interactions. We also discuss isotherms, kinetics, thermodynamic data, selection of eluents, desorption efficiency, and regeneration of adsorbents. Porous carbon-based adsorbents exhibit excellent adsorption capacities of 500-1240 mg g-1. Most adsorbents can be reused over at least four cycles.
... Meanwhile, metal-organic frameworks (MOFs), constructed by Fe metal clusters and organic linkers (Tran et al. 2017), can become interesting templates for synthesizing nanocomposite. In a previous study, magnetically mesoporous carbon nanocomposite (Fe@C) stemmed from Fe-based MOF [Fe 3 O(BDC) 3 or Fe-MIL-88B] has been produced and this kind of material was adopted to remove an emergent chloramphenicol (CAP) antibiotic with high maximum adsorption capacity (96.3 mg/g) (Tran et al. 2019b). Hence, the potential for Fe@C nanocomposite is of great interest in adsorption applications. ...
... In detail, Fe-MOF profile in Fig. S1 gives an emergent range of peaks at 9.6°, 18.7°, and 28.0°. These findings are highly agreeable with some previous publications, suggesting that mentioned materials have been prepared successfully (Doan et al. 2016(Doan et al. , 2017Tran et al. 2019b). On the other hand, its pyrolysis product Fe@C in Fig. 2a appeared only two sharp peaks at around 45°(110) and 65.5° (200) corresponding to the diffraction pattern of zero-valent Fe . ...
The emergent occurrence of sulfonamide species involving sulfadiazine (SDZ) and sulfamethazine (SMZ) in aquatic systems can cause a wide range of potential risks; hence, remediation strategies need to be necessary. Here, we develop the novel metal-organic framework-derived nanocomposite, and apply for the adsorption of SDZ and SMZ antibiotics. To assess the best-fitting kinetic (pseudo first-order, pseudo second-order) and isotherm (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Redlich-Peterson, Sips, Toth, and Khan) models, a series of numerous statistical analysis was performed. Numerous error functions including squares of the errors (SSE), hybrid fractional error function (HYBRID), Marquardt’s percent standard deviation (MPSD), and mean relative error (MRE) were also analyzed to assess the linear and nonlinear models. The results indicated that both linear and nonlinear kinetic models were mostly fitted well with pseudo second-order models (Radj)2 > 0.97. Although linear kinetics gave better (Radj)2, error functions (MRE, SSE, HYBRID, and MPSD) were mostly higher than those of nonlinear kinetics. For adsorption isotherm, nonlinear Redlich-Peterson was the most compatible model with extremely high adjusted coefficients of determination (Radj)2 ~ 1.0000. While nonlinear Langmuir model gave relatively high (Radj)2 (0.9898–0.9960) and acceptable error functions, we found the considerable difference of error functions and parameters among four types of linear Langmuir (Types I, II, III, IV). The findings indicate potential errors as selecting one of linearized Langmuir types in equilibrium study. It is suggested that nonlinear models should be applied for better fitness.
... In recent years, MOF-derived nanocomposites have been widely explored for various oxidation reactions, such as oxidation of alcohols, oxidation coupling of amines and aerobic epoxidation of styrene, and so on [34,35,[78][79][80][81]. A series of Fe, Co, and Ni-involved porous carbon catalysts have been synthesized from transition metal-based MOFs and utilized for the oxidation reaction catalysis. ...
With the consumption of fossil fuels and environmental pollution, it is crucial to search and develop clean renewable energy for sustainable development in modern society. MOF-derived porous materials possess high porosity, large specific surface, high stability, and adjustable component/morphology and have shown great potential in catalysis applications. In this chapter, the synthesis strategies of various MOF-derived porous carbon materials are introduced systematically. The diverse catalysis applications, including heterogeneous catalysis, photocatalysis, and electrocatalysis, will be comprehensively introduced. In the end, particular challenges and opportunities of MOF-derived porous materials for the future development are critically discussed.
... Fourier transform infrared (FT-IR) spectra analysis was carried out on a Nicolet 6700 instrument. The pH drift method was used to evaluate the point of zero charge (pHpzc) for Cu-BDC [24] . 10 mg of Cu-BDC is added to 50 mL of 0.01 mol/L NaCl solution with different initial pH (pH Initial = 2-12 range) using 0.1 mol/L NaOH and HCl. ...
The flexible topology, high surface area, porous structure, and unsaturated metal sites of metal-organic frameworks (MOFs) renders them promising candidates for the remediation of organic pollutants. An environmentally benign, safe, and energy-efficient synthesis process of copper and benzene dicarboxylic acid-based MOF (Cu-BDC) in choline chloride/urea deep eutectic solvent (DES), a promising green solvent, is described. The present protocol for Cu-BDC synthesis conserved 97% of the energy input as compared to the traditional process. The MOF prepared was characterized following different spectrometric techniques such as Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), BET surface area, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. The characterization is in good agreement with those of reported Cu-BDC MOF. The subsequent heterogeneous Fenton-like catalytic application of the Cu-BDC MOF in C.I. Acid orange 7 (AO-II) dye removal from water showed promising efficiency under mild reaction conditions. The effect of initial pH, catalyst loading, H2O2 concentration, and temperature on the catalyst performance was investigated. The best catalytic efficiency (99% dye degradation and 74% COD removal) was achieved for 20 mL of 30 mg/L of AO-II dye concentration for the condition of 5 mM H2O2, 0.05 g/L of Cu-BDC, pH = 6.8, and room temperature. Under optimum reaction conditions, the pseudo-first-order kinetics model was well fitted with the experimental data. The HRLC-MS analysis was performed to identify degradation products and a plausible degradation pathway. The Cu-BDC exhibits recyclability without much loss in its catalytic activity.
... 949.3, and 956.4 eV. Herein, the existence of zero-valent Cu was not detected on XPS profile, but observed on XRD diffraction spectrum of Cu/Cu 2 O/CuO@C partly because hollow carbon matrix may decorate Cu/Cu 2 O/CuO particles, and Cu (I, II) layers may encapsulate zero-valent Cu, hampering the XPS signals to metal atoms [30]. In another interpretation, Zhao et al. claimed that binding energies between Cu (I) and Cu (0) may be overlapped, making Cu signals difficult to distinguish Cu 2 O signals [22]. ...
... The herein outcomes asserted the dominance of pseudo second-order in adsorption kinetic and seemed strongly suitable with other works [38,39]. In our previous publications, above results were very expectable for adsorption models for CIP and TTC [30,40]. ...
... J/mol.K) imply high affinity of Cu/Cu 2 O/CuO@C towards these compounds because of the migration between solvent and adsorbate molecules in heterogeneous phases [53]. Finally, the negative values of Gibbs free energy confirm the spontaneous nature of CIP and TTC adsorption over Cu/ Cu 2 O/CuO@C [30]. ...
... 10) [20], pseudo second-order (Eq. 11) [41], Elovich (Eq. 12) [42], and Bangham (Eq. ...
Herein, an efficient and rapid fabrication procedure for ZIF-8 crystals through microwave-assisted strategy (450 W, 140 °C, and 15 min) was reported. Additionally, the crystallinity, morphology, chemical bonding, and porosity of ZIF-8 was fully characterized by X–ray powder diffraction (XRD), scanning electron microscopes (SEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), and N2 adsorption/desorption isotherm measurement. Response surface methodology approach was established to optimize a series of adsorption conditions: initial concentration (8–92 mg/L), dose (0.6–1.4 g/L), and time (20–220 min) for CR and RhB removals. Many statistical error functions (R², MRE, χ², HYBRID, and MPSD) were analyzed to compare the compatibility of nonlinearised kinetic and isotherm models. Particularly, plausible adsorption mechanisms (electrostatic interactions and π–π stacking) were elucidated and isotherm models were rigorously studied by two-parameter equations (Langmuir, Freundlich, Temkin) and three-parameter equations (Redlich-Peterson, Sips, Khan). Through advantageous effectiveness involving good reusability (4 recycles), high removal efficiency (87–99%), maximum adsorption capacities (95.5–167.0 mg/g), it is recommendable to utilize ZIF-8 as an adequate adsorbent for the dyes remediation.
