Surface area of activated charcoal by Langmuir adsorption isotherm

Dunicz, Boleslaw Ludwik

doi:10.1021/ed038p357

Cited by 19 publications

(13 citation statements)

References 2 publications

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“…( 3 ) where the constants q m and K , are related to the adsorption capacity and the energy of adsorption, respectively. The graph of C e / Q e vs C e was plotted to determine the Langmuir isotherm constants [ 42 , 43 ]. …”

Section: Methodsmentioning

confidence: 99%

Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

Jayaweera

Siriwardane

Silva

et al. 2018

Chemistry Central Journal

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Clean water, which is free from pathogens and toxic chemicals, is vital to human health. The blue planet is encountering remarkable challenges in meeting the ever-increasing demands of clean water. The intention of this research study was to develop a water filter material that is capable of removing bacterial contaminants and heavy metals from fresh water using cost effective and easily fabricated biocompatible filter material. For this purpose, granular activated carbon (GAC) was coated with both hydroxyapatite (HAP) nanoflakes and turmeric extract (TE) (HAP/TE/GAC) which had been extracted from natural turmeric powder. In addition, GAC was coated only with HAP nanoflakes to synthesize HAP coated GAC (HAP/GAC) composite. Prepared HAP/GAC and HAP/TE/GAC were characterized using Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy and UV–visible spectrophotometry. Antibacterial effect of the prepared nanocomposites, HAP/GAC and HAP/TE/GAC was compared with neat GAC using Gram-negative bacteria Escherichia coli. Results showed that antibacterial studies of the synthesized nanocomposites exhibit effective antibacterial activity against E. coli compared with neat GAC alone. However, the composite HAP/TE/GAC revealed better activity than HAP/GAC. Heavy metal adsorption ability of the synthesized composites was carried out using Pb2+ ions at room temperature at different time intervals and different pH levels. The equilibrium adsorption data were assessed via Langmuir and Freundlich adsorption isotherm models for neat GAC, HAP/GAC and HAP/TE/GAC at pH 6. The equilibrium adsorption data for GAC, HAP/GAC and HAP/TE/GAC were well fitted with both Freundlich and Langmuir isotherm models in the given Pb2+ concentrations. The HAP/TE/GAC composite is capable of maintaining the natural function of GAC in addition to removal of bacterial contaminants and heavy metals, which can be used as a point-of-use water filter material.Electronic supplementary materialThe online version of this article (10.1186/s13065-018-0384-7) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

Jayaweera

Siriwardane

Silva

et al. 2018

Chemistry Central Journal

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“…The adsorption Langmuir equilibrium constants and estimated surface area based on AA and MB onto Jatropha fruit pericarp sodium chloride activated carbon (JPS) are presented in Table 3. The specific surface area of monolayer coverage was determined from the value of X m based on the published reports [20,21]. From Table 3 The observed surface area based on MB adsorption is within the range of 600-1000 m 2 /g obtained from activated carbons from similar and related raw materials based on MB adsorption [3,7].…”

Section: Adsorption Isothermmentioning

confidence: 99%

Comparison of sorption capacity and surface area of activated carbon prepared from <i>Jatropha curcas</i> fruit pericarp and seed coat

Okeola¹,

Odebunmi²,

Ameen³

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. Activated carbons were prepared from fruit pericarp and seed coat of Jatropha curcas using KOH and NaCl as activating agents leading to the production of four samples of activated carbons JPS, JPP, JCS and JCP. The adsorption capacity based on adsorption of methylene blue was determined for each sample. A further study of adsorptive properties of the most efficient activated carbon (JPS) was made by contacting it with standard solutions of methylene blue, acetic acid and potassium permanganate. The effects of mass of active carbon used, initial concentration of the solute and the pH of the solution on adsorption performance were investigated. Ash content and percentage fixed carbon were determined for two of the activated carbons (JPS and JCS) with the highest adsorptive capacity. Equilibrium study on adsorption was carried out and the adsorption data were analyzed using the Langmuir isotherm. The results obtained indicate that activated carbons from the fruit pericarp and the seed coat of J. curcas can be used as high performance adsorbents with the fruit pericarp activated carbon showing the higher adsorption capacity. The adsorption data fitted well to the Langmuir model and adsorptive area of 824-910 m 2 /g was obtained for the activated carbon.

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“…In addition, the Langmuir constant Q o obtained from the Langmuir isotherm represents the practical limiting adsorption capacity and is useful in comparing the performance of different adsorbents. It correlates well with specific surface area, and it relates directly with the amount of adsorbate bound from the solution. In the present study, higher adsorption capacity for MIP was observed likely due to large complementary cavities of the template and larger surface area created by the imprinting process.…”

Section: Discussionmentioning

confidence: 99%

Synthesis, Evaluation, and Characterization of an Ergotamine Imprinted Styrene-Based Polymer for Potential Use as an Ergot Alkaloid Selective Adsorbent

et al. 2021

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Alkaloid toxicities negatively impact livestock health and production. To assess alkaloid occurrences, adsorbent technologies may offer effective means to their extraction and isolation from a complex feed matrix. In this study, molecularly imprinted polymers (MIPs) were synthesized and evaluated for their specificity of binding to various ergot alkaloids. Co-polymers of styrene and hydroxyethyl methacrylate were synthesized in the absence or presence of an ergotamine (ETA) template, yielding non-imprinted polymer (NIP) and molecularly imprinted polymer (MIP), respectively. The influence of parameters such as pH, temperature, and initial concentration on the adsorption of ergot alkaloids was evaluated along with their application as solid phase extraction materials. Chemical and morphological properties were characterized. Adsorption was generally greater for MIP compared to NIP. Cross-reactivity with related alkaloids existed due to similarities in structure and functional groups and was dependent on the type and concentration of alkaloid and polymer type (alkaloid type × concentration × product; P < 0.05). The pH of the medium had no influence on the binding properties of polymers toward ETA within a pH range of 2–10. Binding was independent of temperature between 36 and 42 °C. When kinetics of adsorption were evaluated, the Langmuir isotherm had a better fit (R 2 > 0.95) to adsorption equilibrium data than the Freundlich equation. The maximum amounts adsorbed (Q o) from the Langmuir model were 8.68 and 7.55 μM/g for MIP and NIP, respectively. Fourier transform infrared, scanning and tandem electron microscopy, and Brunauer–Emmett–Teller analysis confirmed a highly porous MIP structure with a greater surface area compared to NIP. Binding characteristics evaluated with computational strategy using molecular docking experiments and in vitro in a complex media (rumen fluid) indicated a stronger ETA adsorption by the tested composition selected among other polymeric materials and affinity of MIP compared with NIP. This study suggested the possible utility of MIP as a solid phase extraction sorbent for applications in analytical chemistry or sensing devices tailored to track ergot alkaloid incidence and the fate of those alkaloids in complex ruminal digestive samples.

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Surface area of activated charcoal by Langmuir adsorption isotherm

Abstract: The purpose of this paper is to suggest an interpretation of the experimental data to make the determination of the surface area of activated charcoal by Langmuir adsorption isotherm more meaningful for the student.

Cited by 19 publications

References 2 publications

Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

Comparison of sorption capacity and surface area of activated carbon prepared from <i>Jatropha curcas</i> fruit pericarp and seed coat

Synthesis, Evaluation, and Characterization of an Ergotamine Imprinted Styrene-Based Polymer for Potential Use as an Ergot Alkaloid Selective Adsorbent

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