Ordered Mesoporous Carbon Research Articles

Enhanced adsorption of perfluorooctanoate (PFOA) onto low oxygen content ordered mesoporous carbon (OMC): Adsorption behaviors and mechanisms

The pollution of perfluorooctanoic acid (PFOA) in water bodies has been a serious threat to environment and human health. Ordered mesoporous carbons (OMCs) with different oxygen contents were prepared and first used for adsorbing PFOA from aqueous solutions. The OMC-900 with a lower oxygen content has a higher PFOA adsorption capacity than the oxygen-rich OMC-700. OMCs require a much shorter time to reach the adsorption equilibrium comparing with other adsorbents reported in literature. The mesopores play an important role in this rapid adsorption kinetics. The pseudo-second-order model better fitted the kinetic data. The multilayers adsorption was proposed for the adsorption of PFOA onto OMCs since the Freundlich isotherm model fits the experimental data well. The micelle or hemi-micelle structures may be formed during the adsorption. Various background salts showed a positive effect on PFOA adsorption due to the salting-out and divalent bridge effects. The humic acid can lead to a discernible reduction in PFOA adsorption by competing for adsorption sites on OMCs. The hydrophobic interaction and electrostatic interaction adsorption mechanisms were proposed and verified by the adsorption data. The high adsorption capacity and fast adsorption kinetics of the OMC make it a potential adsorbent for PFOA removal in engineering applications.

Ultra-small NiFe-layered double hydroxide nanoparticles confined in ordered mesoporous carbon as efficient electrocatalyst for oxygen evolution reaction

Nickel–iron layered double hydroxide (NiFe-LDH) is regarded as a promising oxygen evolution reaction (OER) catalyst due to high abundance, low cost and flexible electronic structure. Nevertheless, the limited edge active sites and intrinsic low conductivity seriously hinder its catalytic activity. Herein, we fabricated a highly active catalyst by entrapping NiFe-LDH nanoparticles in ordered mesoporous carbon (OMC) for OER. The mesopores of OMC as nanoreactors can spatially restrict the growth of NiFe-LDH, enabling the formation of ultra-small (~5 nm) nanoparticles. Compared with two-dimensional nanosheets, the NiFe-LDH nanoparticles with less shape anisotropy expose more edge atoms as catalytic active sites. In addition, the NiFe-LDH particles in-situ grown in the pores form intimate contact with the carbon, which triggers the transfer of electrons from NiFe-LDH to OMC and promotes the adsorption of OH−, further accelerating OER kinetics. The catalyst exhibited outstanding catalytic performance towards the OER, delivering 10 and 100 mA cm−2 current density at 223 and 296 mV overpotential, respectively, as well as low Tafel slope 56.6 mV dec−1. Moreover, its mass activity is more than eight times higher that of NiFe-LDH nanosheets (at 300 mV overpotential).

Testing PtCu Nanoparticles Supported on Highly Ordered Mesoporous Carbons CMK3 and CMK8 as Catalysts for Low-Temperature Fuel Cells

Pt(Cu) nanoparticles supported on CMK3 and CMK8 ordered mesoporous carbons (OMCs) have been synthesized by electroless deposition of Cu followed by galvanic exchange with Pt. The structural characterization by high-resolution transmission electron microscopy and X-ray diffraction showed the formation of Pt(Cu) nanoparticles of 4–5 nm, in which PtCu alloys with contracted fcc Pt lattice and 70–80 at.% Pt was identified. The X-ray photoelectron spectroscopy analyses indicated that the Pt(Cu) nanoparticles were mainly composed of a PtCu alloy core covered by a Pt-rich shell, in agreement with the steady cyclic voltammograms, which did not show any Cu oxidation peaks. Electroactive surface areas up to about 70 m2 gPt−1 were obtained. The onset potentials for CO oxidation and the oxygen reduction reaction were more negative and positive, respectively, as compared to Pt/C, thus indicating higher activity of these Pt(Cu) catalysts with respect to the latter. Based on the corresponding binding energies, these better activities were attributed to the favorable geometric and ligand effects of Cu on Pt, which were able to reduce the adsorption energy of the intermediates on Pt. Pt(Cu)/CMK3 showed competitive mass and specific activities, as well as better stability than Pt/C.

Selective Oxidation of Benzyl Alcohol with Oxygen Catalyzed by Vanadia Supported on Nitrogen-Containing Ordered Mesoporous Carbon Materials

Selective Oxidation of Benzyl Alcohol with Oxygen Catalyzed by Vanadia Supported on Nitrogen-Containing Ordered Mesoporous Carbon Materials

Modification of ordered mesoporous carbon for removal of environmental contaminants from aqueous phase: A review

Contamination of water bodies by potentially toxic elements and organic pollutants has aroused extensive concerns worldwide. Thus it is significant to develop effective adsorbents for removing these contaminants. As a new member of carbonaceous material families (activated carbon, biochar, and graphene), ordered mesoporous carbon (OMC) with larger specific surface area, ordered pore structure, and higher pore volume are being evaluated for their use in contaminant removal. In this paper, modification techniques of OMC were systematically reviewed for the first time. These include nonmetallic doping modification (nitrogen, sulfur, and boron) and the impregnation of nano-metals and metal oxides (iron, copper, cobalt, nickel, magnesium, and rare earth element). Reaction conditions (solution pH, reaction temperature, sorbent dosage, and contact time) are of critical importance for the removal performance of contaminants onto OMC. In addition, the pristine and modified OMC have been investigated for the removal of a range of contaminants, including cationic/anionic toxic elements and organic contaminants (synthetic dye, phenol, and others), and involving different and specific mechanisms of interaction with contaminants. The future research directions of the application of pristine and modified OMC were proposed. Overall, this review can provide sights into the modification techniques of OMC for removal of environmental contaminants.

An ultrasensitive disposable sandwich-configuration electrochemical immunosensor based on OMC@AuNPs composites and AuPt-MB for alpha-fetoprotein detection

Early finding and diagnosis are critical for prevention and treatment of hepatocellular carcinoma (HCC). Alpha-fetoprotein (AFP) is a typical biomarker of HCC. Since AFP level can reflect the severity of HCC, it is essential to ensure the accurate detection of AFP. In this study, through a combination of the advantages exhibited by ordered mesoporous carbon (OMC)@gold nanoparticles (AuNPs) composites and AuPt-methylene blue (AuPt-MB), a disposable ultrasensitive sandwich-configuration electrochemical immunosensor for determination of AFP was designed. Characterized by excellent conductivity, highly ordered pore distribution and great surface area, OMC can be effective in promoting electron transfer and loading a large number of AuNPs. In the meantime, AuNPs can also immobilize AFP-Ab1 through Au-N bonds. As a new redox-active species, rod-like AuPt-MB demonstrates high conductivity, uniform morphology and excellent biocompatibility, which makes it capable not only to fix AFP-Ab2, but also to release electrochemical signals. A wide linearity of 10 fg mL−1-100 ng mL−1 and a low detection limit of 3.33 fg mL−1 (S/N = 3) were obtained. Moreover, the proposed immunosensor exhibited acceptable selectivity, high stability and reproducibility. The excellent performance in detecting serum samples endows the proposed immunosensor with broad prospects of extensive application in the detection of disease biomarkers.

Effect of sample preparation on analysis of human milk endogenous peptides using liquid chromatography-tandem mass spectrometry

人乳内源肽是乳蛋白在乳腺中被降解形成的具有生理功能的肽,是人乳的重要组成部分,研究人乳内源肽对于婴儿健康具有重要的意义。高效液相色谱-串联质谱(LC-MS/MS)联用技术的应用,促使人乳内源肽的研究取得了突破性的进展。人乳中内源肽含量低、干扰组分多,样品制备方法是影响分析结果的关键步骤。为了研究样品制备方法对分析结果的影响,分别采用不变性超滤法(UF 1)、热变性超滤法(UF 2)、化学变性超滤法(UF 3)、三氯乙酸沉淀法(PCPN 1)、乙醇沉淀法(PCPN 2)、强疏水性碳介孔材料(highly ordered mesoporous carbon, OMC)富集法等6种方法从人乳中提取内源肽,利用LC-MS/MS研究样品制备方法对人乳内源肽分析结果的影响。结果表明,UF 1和UF 2法制备的样品中可鉴定到的肽段数目分别为1161±8条和1017±91条,两种方法制备的样品中肽序列的重合率大于70%, UF 1在所有方法中鉴定到的肽的数目最多。UF 3法制备的样品所能鉴定到的肽段数目最少,仅为366±18条。PCPN 1和PCPN 2两种沉淀法制备样品中的内源肽分别为779±69和876±55条,但内源肽差异较大,仅有约50%肽段序列重合。OMC法制备样品中肽的数目为549±151条,与其他方法相比,虽然鉴定的肽数量上没有优势,但该方法制备的样品中肽在等电点(pI)和亲水性平均系数(GRAVY)等性质上没有偏倚,说明该法可用于制备特定人乳内源肽。6种方法制备的样品中鉴定到来源于β-酪蛋白、免疫球蛋白受体、骨桥蛋白、αS1-酪蛋白、κ-酪蛋白和胆盐激活脂肪酶的肽,并且源于以上蛋白质的肽段总数在该样品中均超过88%,说明6种方法制备的样品都可以满足鉴定一般人乳内源肽的需求。UF 2、UF 3和OMC法制备的样品中鉴定到源于乳铁蛋白的内源肽的数目分别为21、38和19条,内源肽在乳铁蛋白上的覆盖率分别为14%、16%和19%,而文献常用的PCPN 1法制备的样品则会丢失此类内源肽。综上,UF 2法制备的样品不仅肽段数量多、母体蛋白质种类丰富,还可鉴定到源于乳铁蛋白的肽,可作为人乳内源肽组学研究中的首选方法。

Efficient batch and Fixed-Bed sequestration of a basic dye using a novel variant of ordered mesoporous carbon as adsorbent

Herein, an ordered mesoporous carbon (OMC) material was prepared using a metal and halogen free method, and its adsorptive potential for the cationic dye, ‘Methylene Blue’ (MB), was investigated. Batch studies were carried out to determine the influence of pH, dye concentration, adsorbent quantity, and contact time on adsorption behaviour. Adsorption models based on Langmuir, Freundlich, Temkin and Dubinin-Radunkevich isotherms were validated and the thermodynamic variables governing the nature and feasibility of reaction were evaluated. Values of the adsorption uptake at equilibrium (qe) decreased as the temperature was increased, suggesting thereby that the adsorption process involved was exothermic. Kinetic studies indicated that adsorption obeyed pseudo-second order behaviour and operated via a ‘film-diffusion’ mechanism. When attempts were made to carry out bulk removal of MB using a fixed bed adsorption column, 99.5% saturation could be achieved. Desorption of MB from the used column was performed and dye recovery was almost 100% in the first cycle and on 5th cycle 99% of dye was obtained. This pattern clearly indicates that for the cationic dye MB, OMC acts as a highly efficient and robust adsorbent.

An easy-fabricated ordered mesoporous carbon-based electrochemical sensor for the analysis of trans-resveratrol in red wines

As one of the evaluation indicators of red wines, trans-resveratrol (TRA) is demonstrated to be beneficial to human health to some extent. Here, amperometry is firstly adopted for the sensitive and selective quantification of TRA in red wines by using ordered mesoporous carbon (OMC) modified screen-printed electrochemical sensor. The addition of high surface area, electrically conductive OMC enhances the electron transfer between TRA and electrode surface. Under the optimized experimental conditions, the current response is found to increase linearly with TRA concentration from 5 μM to 50 μM, with the limit of detection of 0.473 μM (S/N = 3). Moreover, the recoveries of TRA in commercially available red wines are obtained from 87.98% to 102.87% with relative standard deviations below 2.0%. Results suggest that the sensor has excellent performance for routine TRA analysis in real samples, where the accuracy has been verified by high-performance liquid chromatography (HPLC).

Identification of the Physicochemical Factors Involved in the Dye Separation via Methionine‐Functionalized Mesoporous Carbons

AbstractSynthetic dyes in the wastewater from different industries have adverse effects on human and animal health and cause disturbance of the environmental equilibrium. Functional porous materials have provided significant progress in the removal of dyes from wastewater using adsorption methods. Yet, the correlation and deeper understanding of the physicochemical properties of the porous materials and the dye remains a great challenge. Although ordered mesoporous carbons (OMCs) have unique beneficial features for dye separation, such as high surface area, uniform pore size, good mechanical and thermal stability, so far no report explores OMCs for selective dye adsorption from mixtures. Herein, OMCs of different morphologies and structures are synthesized via nanocasting and modification with methionine amino acid as new adsorbents for rhodamine B and sunset yellow FCF dyes. The results confirm that the obtained carbon materials have a significantly better affinity to rhodamine B than to sunset yellow FCF, which is related to the presence of a high number of acidic functional groups on their surface. In addition, the morphology of materials plays also an important role in the adsorption process. Carbon spheres with wrinkled walls are more efficient in the removal of both dyes than carbon particles with worm‐like shapes.

Ordered mesoporous carbon with tubular framework supported SnO2 nanoparticles intertwined in MoS2 nanosheets as an anode for advanced lithium-ion batteries with outstanding performances

A new nanocomposite based on three-dimensional ordered mesoporous carbon (OMC) with tubular framework supported SnO2 nanoparticles entangled in MoS2 nanosheets is developed ingeniously by nanocasting and hydrothermal methods. The bimodal mesoporous interconnected architecture of CMK-9 and MoS2 nanosheets host SnO2 nanoparticles inside the mesopores and interlayer regions. Herein, for the first time, electrochemical performances of SnO2/MoS2 heterojunction are explored with an OMC. The present architecture improves the diffusion of ions and conduction of charges, which assist in achieving outstanding capacity, superior rate capability and stable cycle life when the nanocomposite is employed as the anode for lithium-ion batteries (LIBs). Among the nanocomposites, the SnO2/MoS2(1:3)@CMK-9 anode delivers a large initial discharge capacity of 2211 mA h g−1 and an outstanding discharge capacity of 1245 mA h g−1 after 300 cycles with a capacity retention of 96% as compared to the 3rd cycle (1291 mA h g−1) at a current density of 100 mA g−1. At a current density of 1000 mA g−1, the anode provides an exceptional discharge capacity of 823 mA h g−1 after 1000 cycles with capacity retention of 91% as compared to the 3rd cycle. The present architecture of SnO2/MoS2(1:3)@CMK-9 nanocomposite anode with excellent electrochemical performances signifies its potential use in next generation LIBs.

Facile fabrication of composited solid phase microextraction thin membranes for sensitive detections of trace hydroxylated polycyclic aromatic hydrocarbons in human urine

Solid phase microextraction (SPME) has potential to be used for the high-performance enrichments of hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs), which are important biomarkers of PAH exposure. By choosing suitable adsorbent, it is conducive to fabricate new-type of SPME device for improved extraction efficiencies towards OH-PAHs. In this study, a novel method of surface solvent evaporation has been proposed to fabricate SPME thin membrane, integrating the advantages of polydimethylsiloxane (PDMS) and different porous adsorbents. The powdery metal organic framework (Uio66-NH2), porous polymer (powdery polymer aerogel, PPA) and ordered mesoporous carbon (OMC) have been chosen as typical adsorbents and fabricated as thin membranes successfully, indicating the universality of the proposed method for membrane fabrication. Comparing the extraction efficiencies of three prepared membranes towards OH-PAHs, the OMC-PDMS membrane has demonstrated best enrichment efficiencies. The OMC-PDMS membrane was used for the enrichments of trace OH-PAHs in human urine of both smokers and nonsmokers, combining with liquid chromatographic tandem mass spectrometry (LC-MS/MS). The detection limits were in the range of 0.15–0.39 ng L−1, and satisfactory recoveries were found to be 82.1%–115%. It can be seen that the universal strategy to fabricate SPME membrane is helpful to achieve broad-spectrum or selective enrichments of target analytes from complex matrix by simple modulation of membrane components.

Ordered Mesoporous Carbons via Self-Assembly of Tailored Block Copolyethers for Pore Size-Dependent Applications

Using an organocatalytic polymerization method for the preparation of well-defined, amphiphilic block copolyethers of the type PPOn/2-PEOm-PPOn/2 (“Reverse Pluronics”, Mn up to 50 000 g/mol, ĐM = 1.01–1.08, >100 examples), it is demonstrated that the application of these polymers as structure-directing agents (SDAs) in a standard soft-templating process delivers ordered mesoporous carbons (OMCs), whereby the resulting pore diameters are monomodal and narrowly distributed. Moreover, by the judicious choice of the SDA properties (total molar mass, ratio of n and m, and PPO block length), pore diameters in the range of 6–18 nm can be selectively addressed, notably within the same arrangement pattern (2D hexagonal, p6mm). This provides a rational, operationally simple method to tailor pore properties of otherwise uniform carbons, also significantly reducing the effort necessary to obtain systematically altered materials. Ready access to such quick screenings is assumed to be immensely useful for pore size-dependent applications from numerous disciplines such as sensing, catalysis, or energy storage and conversion. Surprisingly, it is not only found that a minimum of Mn = 13 000 g/mol is required to deliver ordered (nondistorted) materials under these conditions but also that very high-molar-mass SDAs are best suited to achieve optimum results, potentially providing an explanation for why “Reverse Pluronics” are frequently, and wrongly, thought to be per se unsuitable for the preparation of well-ordered mesoporous carbons.

Boron-modified Ordered Mesoporous Carbons as a novel electrode film for simultaneously Voltammetric Detection of Cadmium(II), Lead(II),Copper(II) and Mercury(II) ions

Boron-modified Ordered Mesoporous Carbons as a novel electrode film for simultaneously Voltammetric Detection of Cadmium(II), Lead(II),Copper(II) and Mercury(II) ions

ZVI impregnation altered arsenic sorption by ordered mesoporous carbon in presence of Cr(Ⅵ): A mechanistic investigation

It is challenging to efficiently remove arsenate (As(Ⅴ)) and chromate (Cr(Ⅵ)) simultaneously. Herein, ordered mesoporous carbon (OMC) was fabricated with averaged pore diameter of 6.5 nm and surface area of 997 m2 g−1. Zerovalent iron (ZVI) impregnation reduced surface area of ZVI/OMC (432 m2 g−1) and increased ID/IG ratio by 13%. Maximal Cr(Ⅵ) and As(Ⅴ) sorption capacities at pH 3 were 0.66 and 0.019 mmol g−1 by OMC, and 0.71 and 0.39 mmol g−1 by ZVI/OMC, respectively. Reduction accounted for over 55% for Cr(Ⅵ) and As(Ⅴ) removal followed by complexation and precipitation. Better ZVI/OMC performance was ascribed to higher electron transfer rate and lower electrical resistance than OMC as per electrochemical analysis. Upon Cr(Ⅵ) introduction, As(Ⅴ) removal increased to 0.28 mmol g−1 by OMC, but decreased to 0.16 mmol g−1 by ZVI/OMC. OMC could preferably reduce CrO42− to Cr3+ by hydroxyl group, which enhanced its zeta potential facilitating As(Ⅴ) sorption. Regarding ZVI/OMC, Fe0 and Fe oxide in ZVI/OMC exhibited better affinity to As(Ⅴ), but the competition for the similar active sites resulted in compromised As(Ⅴ) and Cr(Ⅵ) removal. Thus, the novel OMC is advantageous for removal of binary As(Ⅴ) and Cr(Ⅵ), but ZVI/OMC is robust to detoxify single heavy metal.

Insight into the Solid Electrolyte Interphase Formation in Bis(fluorosulfonyl)Imide Based Ionic Liquid Electrolytes

AbstractThe formation of the solid electrolyte interphase (SEI) in an ionic liquid electrolyte of 0.5 m lithium bis(fluorosulfonyl)imide (LiFSI) in 1‐ethyl‐3‐methylimidazolium bis(fluorosulfonyl)imide at high cell voltages (1.7–1.9 V) is investigated in ordered mesoporous carbon (OMC) based Li metal cells using an operando small‐angle neutron scattering (SANS) technique coupled with electrochemical impedance spectroscopy and ex situ X‐ray photoelectron spectroscopy (XPS). It is demonstrated that discharging the OMC Li metal cells to ≈2 V and holding the cell voltage constant induces a rapid current increase with time, confirming extensive reduction and SEI formation. XPS analysis reveals that LiF is formed at open cell voltage (OCV), which is attributed to the carbenes generated at the lithium negative electrode because of its reaction with EMIm cation diffusing to and initiating the reaction with FSI− anions at the carbon positive electrode. It is confirmed that the chemical reaction at OCV and electrochemical reduction at high cell voltage of the FSI− anion plays a protective role against EMIm cation co‐intercalation into the carbon positive electrode during the initial discharge. Operando SANS studies also suggest that slight differences occur in the surface composition and reaction mechanism as a function of cell voltage.

High-Volumetric Supercapacitor Performance of Ordered Mesoporous Carbon Electrodes Enabled by the Faradaic-Active Nitrogen Doping and Decrease of Microporosity

Introducing electroactive nitrogen functionalities and decreasing microporosity are favorable for increasing the bulk density and thus beneficial for enhancing the volumetric performance of superca...

Insight into the performance and stability of N-doped Ordered Mesoporous Carbon Hollow Spheres for the ORR: Influence of the nitrogen species on their catalytic activity after ADT

Novel N-doped Ordered Mesoporous Carbon Hollow Spheres (N-OMCHS) were successfully synthetized using two different nitrogen sources: i) 2-pyridinecarboxaldehyde (labeled as N1-OMCHS), and ii) pyrrole (labeled as N2-OMCHS). The catalytic activity of the synthesized N-OMCHS was evaluated towards the Oxygen Reduction Reaction (ORR) in alkaline media. Likewise, the effect of Accelerated Degradation Test (ADT) on the stability of the N-OMCHS was discussed. N2-OMCHS showed the best performance for the ORR (Eonset = 0.88 V, E½ = 0.82 V, H2O2 yield = 3.8% and n = 3.92, all potentials vs. RHE). Surprisingly, after evaluating the stability of each electrocatalyst by ADT, it was observed that the performance of N1-OCMHS improved with respect to that evaluated before ADT. N1-OCMHS had a better stability compared to N2-OMCHS. X-ray photoelectron spectroscopy (XPS) results before and after ADT demonstrated the chemical modification of nitrogen species on the surface of the electrocatalysts, which influenced a better performance towards the ORR. Therefore, N-OMCHS were considered as potential non-platinum electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC) cathode applications.

Multi-dimensional ordered mesoporous carbon/silica@Ni composite with hierarchical nanostructure for strong and broadband microwave absorption

Ordered mesoporous carbon (OMC) has been regarded as a promising carbonaceous material for microwave absorption (MA) owing to its high specific surface area, sufficient ordered mesoporous nanostructures and easy decoration. However, its development in MA performance is seriously hampered by its shortcomings of lacking magnetic loss and poor impedance matching. Herein, a series of multi-dimensional ternary OMC/SiO2@Ni composites with hierarchical nanostructure (zero-dimensional (0D) Ni nanoparticles and three-dimensional (3D) OMC/SiO2 framework) is successfully prepared via a self-assembly method, an in situ synthesis, and followed by a calcination treatment. By adjusting the calcination temperature and Ni nanoparticle content, OMC/SiO2@Ni composites with different graphitization degree, Ni nanoparticle size and magnetic properties can be easily obtained. Remarkably, OMC/SiO2@Ni0.5-700 composite exhibits an exceedingly strong reflection loss (RL) value of −62.2 dB and a broad effective absorption bandwidth (RL ≤ −10 dB) of 8 GHz (almost covers X and Ku bands) with a layer thickness of only 2.5 mm. Such fabulous MA performance comes from a synergy between the well-designed hierarchical ternary nanostructure and improved impedance matching. This work provides an insight for rational structure design and multi-component loss mechanism of lightweight MA material, which shows great potential in practical applications.

Desorption of chloramphenicol from ordered mesoporous carbon-alginate beads: Effects of operating parameters, and isotherm, kinetics, and regeneration studies

This study has investigated the desorption of an emerging contaminant, known as chloramphenicol (CPC), from ordered mesoporous carbon (OMC)-alginate beads. The effects of initial concentration, operating temperature, and a selection of eluents (water, ethanol, and sodium chloride (NaCl)) on the whole desorption process were analysed. The desorption efficiency was found to decrease with increasing temperature, an indication for a favourable desorption process at a lower temperature range. NaCl was the most effective eluent for the CPC desorption process, followed by ethanol and water. The use of 1 M NaCl has resulted in the highest desorption efficiency of 84.7%. Redlich-Peterson and Freundlich isotherm models fitted well to the CPC desorption experimental data. The desorption kinetic data for ethanol and NaCl as eluents fitted well to the pseudo-second order kinetic model. Meanwhile, distilled water as an eluent was best fitted to the pseudo-first order kinetic model. The CPC adsorption efficiency began to notably decrease from 78.9% to 48.5% after five consecutive adsorption/desorption cycles. Similarly, the desorption efficiency began to decrease from 76.0% in the first cycle down to 35.2% in the fifth cycle. These findings demonstrated that the OMC-alginate beads are a very promising adsorbent with excellent desorption and reusability characteristics towards the targeted antibiotic, CPC.