NaOH-activated carbon of high surface area produced from guava seeds as a high-efficiency adsorbent for amoxicillin removal: Kinetic, isotherm and thermodynamic studies

Pezoti, Osvaldo; Cazetta, André L.; Bedin, Karen C.; Souza, Lucas S.; Martins, Alessandro F.; Silva, Taís L.; Júnior, Oscar O. Santos; Visentainer, Jesuí V.; Almeida, Vitor C.

doi:10.1016/j.cej.2015.12.042

Cited by 400 publications

(122 citation statements)

References 50 publications

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“…and T = temperature (K); Source: Modified from Pezoti et al [28], Foo and Hameed [29] and Chen [31].…”

Section: Lactic Acid Adsorption Isothermsmentioning

confidence: 99%

“…In this study, we chose three commonly used isotherm models (i.e., Langmuir (Equation (I)), Freundlich (Equation (II)) and Temkin (Equation (III))) to describe the lactic acid adsorption process [25,28]. The linear and non-linear forms of the isotherm model equations are presented in Table 1 [28,29].…”

Section: Lactic Acid Adsorption Isothermsmentioning

confidence: 99%

“…The samples were periodically collected from the serum bottles and analyzed for residual lactic acid concentrations. The kinetic models of pseudo-first order (Equation (A)), pseudo-second order (Equation (B)) and Elovich (Equation (C)) were investigated in order to describe the adsorption dynamics of lactic acid onto the GAC, RLX425 and AMB400 [28]. The differential and linear forms of the adsorption kinetic model equations are shown in Table 2 [32,33].…”

Section: Lactic Acid Adsorption Kineticsmentioning

confidence: 99%

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Adsorption Behaviour of Lactic Acid on Granular Activated Carbon and Anionic Resins: Thermodynamics, Isotherms and Kinetic Studies

et al. 2017

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Solid-liquid extraction (adsorption or ion exchange) is a promising approach for the in situ separation of organic acids from fermentation broths. In this study, a diluted concentration of lactic acid (<10 g/L) separation from a model fermentation broth by granular activated carbon (GAC) as well as weak (Reillex ® 425 or RLX425) and strong (Amberlite ® IRA-400 or AMB400) base anion exchange resins under various operating conditions was experimentally investigated. Thermodynamic analysis showed that the best lactic acid adsorption performances were obtained at a pH below the pK a value of lactic acid (i.e., 3.86) for GAC and RLX425 by physical adsorption mechanism and above the pK a value for the AMB400 resin by an ion exchange mechanism, respectively. The adsorption capacity for GAC (38.2 mg/g) was the highest, followed by AMB400 (31.2 mg/g) and RLX425 (17.2 mg/g). As per the thermodynamic analysis, the lactic acid adsorbed onto GAC and RLX425 through a physical adsorption mechanism, whereas the lactic acid adsorbed onto AMB400 with an ion exchange mechanism. The Langmuir adsorption isotherm model (R 2 > 0.96) and the pseudo-second order kinetic model (R 2~1 ) fitted better to the experimental data than the other models tested. Postulating the conditions for the real fermentation broth (pH: 5.0-6.5 and temperature: 30-80 • C), the resin AMB400 represents an ideal candidate for the extraction of lactic acid during fermentation.

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“…and T = temperature (K); Source: Modified from Pezoti et al [28], Foo and Hameed [29] and Chen [31].…”

Section: Lactic Acid Adsorption Isothermsmentioning

confidence: 99%

Section: Lactic Acid Adsorption Isothermsmentioning

confidence: 99%

Section: Lactic Acid Adsorption Kineticsmentioning

confidence: 99%

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Adsorption Behaviour of Lactic Acid on Granular Activated Carbon and Anionic Resins: Thermodynamics, Isotherms and Kinetic Studies

et al. 2017

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“…Macro (>50 nm), meso (2-50 nm) and micro (<2 nm) pores are all present in the highly branched internal structure of AC [46]. The main effect of this high porosity structure is to impart a high surface area to AC, up to 2500 m 2 /g [47]. Consequently, this results in a large number of binding sites for adsorbate species to interact with.…”

Section: Properties Of Activated Carbon Relevant To Water Purificationmentioning

confidence: 99%

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Sweetman

May²,

Mebberson³

et al. 2017

170

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Abstract:To ensure the availability of clean water for humans into the future, efficient and cost-effective water purification technology will be required. The rapidly decreasing quality of water and the growing global demand for this scarce resource has driven the pursuit of high-performance purification materials, particularly for application as point-of-use devices. This review will introduce the main types of natural and artificial contaminants that are present in water and the challenges associated with their effective removal. The efficiency and performance of recently developed materials for water purification, with a focus on activated carbon, carbon nanotubes and graphene will be discussed. The recent advances in water purification using these materials is reviewed and their applicability as point-of-use water purification systems discussed.

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“…In the literature, other bioresources such as macadamia nut shell, guava seed, and Euphorbia rigida have been reported to make AC materials by using NaOH activation (Martins et al 2015;Pezoti et al 2016;Kılıç et al 2012). The mesopore ratio, surface area and pore volume of ACs range from 15.0 to 21.8 %, 396 to 2574 m 2 /g, and 0.202 to 1.260 cm 3 /g, respectively.…”

Section: Analysis Of Pore Structurementioning

confidence: 99%

An Effective Method to Enhance Adsorption Capacity and Mesoporosity of Activated Carbon by Pre-Pyrolysis and Chemical Activation Procedures

Liou¹,

Wang²,

Liou³

2016

BioResources

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Activated carbons with large adsorption capacity and high mesopore fraction were obtained from rice straw by a combination of pre-pyrolysis and NaOH activation procedures. The experiments varied the prepyrolysis procedure, impregnation ratio of activating agent, and activation temperature. Samples were examined by inductively coupled plasmamass spectrometry (ICP-MS), X-ray diffractometry (XRD), field-emission scanning-electronic microscopy (FE-SEM), thermogravimetric analysis (TGA), and N2-adsorption analysis. The surface area and pore characteristics of the activated carbons were investigated by the Brunauer, Emmett, Teller (BET) method, Dubinin-Raduch (DR) model, and the t-plot method. The surface area, pore volume, and iodine adsorption capacity of the samples increased with increasing activation temperature and the impregnation ratio of the activating agent. A maximum surface area of 2093 m 2 /g was obtained at the activation temperature of 900 °C. The pore structure in the one-stage activation procedure was mainly microporous. Two-stage activation procedure efficiently enhanced mesopore volume, and therefore further increased the adsorption capacity of activated carbons. NaOH acted as both the activating agent in the reaction and as the cleaner to remove the ash. The results of this experiment will be useful in developing resource recovery systems from agricultural biomass.

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NaOH-activated carbon of high surface area produced from guava seeds as a high-efficiency adsorbent for amoxicillin removal: Kinetic, isotherm and thermodynamic studies

Cited by 400 publications

References 50 publications

Adsorption Behaviour of Lactic Acid on Granular Activated Carbon and Anionic Resins: Thermodynamics, Isotherms and Kinetic Studies

Adsorption Behaviour of Lactic Acid on Granular Activated Carbon and Anionic Resins: Thermodynamics, Isotherms and Kinetic Studies

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

An Effective Method to Enhance Adsorption Capacity and Mesoporosity of Activated Carbon by Pre-Pyrolysis and Chemical Activation Procedures

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