Preparation and Adsorption Properties of Corncob-Derived Activated Carbon with High Surface Area

Wang, Y. X.; Liu, B. S.; Zheng, Chenggong

doi:10.1021/je1002913

Cited by 39 publications

(25 citation statements)

References 34 publications

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“…The mixture was filtered in a funnel under gravity and once the oil dripping stopped from the filter paper the sample was weighed. The oil adsorption capacity (g/g) was estimated using the following equation :

O A C = \frac{w - w_{o}}{w_{o}}

where w is the weight of the sample before adsorbing oil and w o is the weight of the sample after adsorbing oil. All measurements were performed in triplicate and average values are reported.…”

Section: Methodsmentioning

confidence: 99%

The physical and adsorption properties of different modified corn starches

Sun

et al. 2015

Starch Stärke

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In order to improve the physical and adsorption properties of native corn starch, porous starch was prepared. Furthermore, dual‐modification of starches – enzyme hydrolyzed starch followed by cross‐linking as well as enzyme hydrolysis upon cross‐linking was explored. The results suggested that enzyme hydrolyzed starch followed by cross‐linking was significantly different from enzyme hydrolysis upon cross‐linking. The granular specific surface area of the dual‐modified starches was more than thousand orders of native corn starch. Crosslinked starch phosphates and enzyme hydrolyzed starch followed by cross‐linking had higher gelatinization temperature than porous starch and cross‐linked starch followed by enzyme hydrolysis. The ΔH of crosslinked starch phosphates and dual‐modification of starches were larger than that of native corn starch and porous starch, which indicates that the cross‐linking strengthens the starch granules and hence more energy is required for disruption. The absorption capacities of enzyme hydrolyzed starch followed by cross‐linking and enzyme hydrolysis upon cross‐linking were 5 times more than that of native corn starch, crosslinked starch phosphates and porous starch. Overall, it is concluded that the combination of cross‐linking and enzyme hydrolysis is a favorable approach to increase the mechanical strength and adsorptive capacity of porous starches.

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O A C = \frac{w - w_{o}}{w_{o}}

where w is the weight of the sample before adsorbing oil and w o is the weight of the sample after adsorbing oil. All measurements were performed in triplicate and average values are reported.…”

Section: Methodsmentioning

confidence: 99%

The physical and adsorption properties of different modified corn starches

Sun

et al. 2015

Starch Stärke

View full text Add to dashboard Cite

show abstract

“…Currently, a lot of kinetic models are proposed to describe the experimental data. For example, Langmuir model [24,25], Langmuir-Freundlichmodel [26,27], pseudo-first-order [28], pseudo-second-order [29], and Avrami's model [21,30,31]. Kinefuchi et al [30] found that Avrami's fractional-order kinetic model could describe the desorption process well.…”

Section: Desorption Kineticsmentioning

confidence: 99%

Desorption Kinetics and Mechanisms of CO2 on Amine-Based Mesoporous Silica Materials

Teng

Liu

et al. 2017

Energies

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Tetraethylenepentamine (TEPA)-based mesoporous MCM-41 is used as the adsorbent to determine the CO 2 desorption kinetics of amine-modified materials after adsorption. The experimental data of CO 2 desorption as a function of time are derived by zero-length column at different temperatures (35, 50, and 70 • C) and analyzed by Avrami's fractional-order kinetic model. A new method is used to distinguish the physical desorption and chemical desorption performance of surface-modified mesoporous MCM-41. The activation energy E a of CO 2 physical desorption and chemical desorption calculated from Arrhenius equation are 15.86 kJ/mol and 57.15 kJ/mol, respectively. Furthermore, intraparticle diffusion and Boyd's film models are selected to investigate the mechanism of CO 2 desorption from MCM-41 and surface-modified MCM-41. For MCM-41, there are three rate-limiting steps during the desorption process. Film diffusion is more prominent for the CO 2 desorption rates at low temperatures, and pore diffusion mainly governs the rate-limiting process under higher temperatures. Besides the surface reaction, the desorption process contains four rate-limiting steps on surface-modified MCM-41.

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“…The correlation coefficients for the Freundlich plot is higher than that for the Langmuir plot, which indicates that the adsorption of wool carpet dyes can better be described by the Freundlich adsorption isotherms. High surface area activated carbons have been used as efficient adsorbents for the removal of organic dyes from water [44][45][46][47][48][49][50]. Inspired by the observed high surface area (2129 m 2 ·g −1 ) and large pore volume (2.69 cm 3 ·g −1 ), we investigated the adsorption properties of wool carpet dyes (LO and LG) on NCM_1_600.…”

Section: Introductionmentioning

confidence: 99%

Wool Carpet Dye Adsorption on Nanoporous Carbon Materials Derived from Agro-Product

Pradhananga

Adhikari

Shrestha

et al. 2017

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Abstract:In this paper, wool carpet dye adsorption properties of nanoporous activated carbon materials (NCMs) prepared from bamboo agro-product is reported. Bamboo cane powder was chemically activated with phosphoric acid at different temperatures (400, 500, and 600 • C) at an impregnation ratio of 1:1. We found that the specific surface area and the total pore volume of NCM increases with temperature giving the highest surface area and pore volume ca. 2130 m 2 ·g −1 and 2.69 cc·g −1 at 600 • C. Owing to superior surface textural properties, bamboo-derived NCM showed excellent adsorption capacity for wool carpet dyes Lanasyn orange (LO) and Lanasyn gray (LG). The adsorption phenomena could be described by Langmuir/Freundlich adsorption isotherm models. The maximum adsorption capacity was ca. 2.60 × 10 3 and 3.04 × 10 3 mg·g −1 for LO and LG, respectively. The adsorption followed pseudo second order kinetics with the second order rate constant of 1.24 × 10 −3 g·mg −1 ·min −1 (LO) and 7.69 × 10 −4 g·mg −1 ·min −1 (LG), respectively. This study demonstrated that the high surface area NCMs prepared from agro-product can be used as efficient and cost-effective adsorbent materials for the removal of dyes from industrial effluent.

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Preparation and Adsorption Properties of Corncob-Derived Activated Carbon with High Surface Area

Cited by 39 publications

References 34 publications

The physical and adsorption properties of different modified corn starches

The physical and adsorption properties of different modified corn starches

Desorption Kinetics and Mechanisms of CO2 on Amine-Based Mesoporous Silica Materials

Wool Carpet Dye Adsorption on Nanoporous Carbon Materials Derived from Agro-Product

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