CobaltMaghrebV1, Main, Exploration, bibRecord, 000252

Adsorption of methylene blue onto activated carbon produced from tea (Camellia sinensis L.) seed shells: kinetics, equilibrium, and thermodynamics studies*

Identifieur interne : 000252 ( Main/Exploration ); précédent : 000251; suivant : 000253

Adsorption of methylene blue onto activated carbon produced from tea (Camellia sinensis L.) seed shells: kinetics, equilibrium, and thermodynamics studies*

Auteurs : Jun-Jie Gao [République populaire de Chine] ; Ye-Bo Qin [République populaire de Chine] ; Tao Zhou [République populaire de Chine] ; Dong-Dong Cao [République populaire de Chine] ; Ping Xu [République populaire de Chine] ; Danielle Hochstetter [République populaire de Chine] ; Yue-Fei Wang [République populaire de Chine]

Source :

Journal of Zhejiang University. Science. B [ 1673-1581 ] ; 2013.

RBID : PMC:3709070

Abstract

Tea (Camellia sinensis L.) seed shells, the main byproduct of the manufacture of tea seed oil, were used as precursors for the preparation of tea activated carbon (TAC) in the present study. A high yield (44.1%) of TAC was obtained from tea seed shells via a one-step chemical method using ZnCl₂ as an agent. The Brunauer-Emmett-Teller (BET) surface area and the total pore volumes of the obtained TAC were found to be 1 530.67 mg²/g and 0.782 6 cm³/g, respectively. The equilibrium adsorption results were complied with Langmuir isotherm model and its maximum monolayer adsorption capacity was 324.7 mg/g for methylene blue. Adsorption kinetics studies indicated that the pseudo-second-order model yielded the best fit for the kinetic data. An intraparticle diffusion model suggested that the intraparticle diffusion was not the only rate-controlling step. Thermodynamics studies revealed the spontaneous and exothermic nature of the sorption process. These results indicate that tea seed shells could be utilized as a renewable resource to develop activated carbon which is a potential adsorbent for methylene blue.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3709070

DOI: 10.1631/jzus.B12a0225
PubMed: 23825151
PubMed Central: 3709070

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>Tea (<italic>Camellia sinensis</italic>
 L.) seed shells, the main byproduct of the manufacture of tea seed oil, were used as precursors for the preparation of tea activated carbon (TAC) in the present study. A high yield (44.1%) of TAC was obtained from tea seed shells via a one-step chemical method using ZnCl<sub>2</sub>
 as an agent. The Brunauer-Emmett-Teller (BET) surface area and the total pore volumes of the obtained TAC were found to be 1 530.67 mg<sup>2</sup>
/g and 0.782 6 cm<sup>3</sup>
/g, respectively. The equilibrium adsorption results were complied with Langmuir isotherm model and its maximum monolayer adsorption capacity was 324.7 mg/g for methylene blue. Adsorption kinetics studies indicated that the pseudo-second-order model yielded the best fit for the kinetic data. An intraparticle diffusion model suggested that the intraparticle diffusion was not the only rate-controlling step. Thermodynamics studies revealed the spontaneous and exothermic nature of the sorption process. These results indicate that tea seed shells could be utilized as a renewable resource to develop activated carbon which is a potential adsorbent for methylene blue.</p>
</div>
</front>
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<name sortKey="Wang, Yue Fei" sort="Wang, Yue Fei" uniqKey="Wang Y" first="Yue-Fei" last="Wang">Yue-Fei Wang</name>
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Adsorption of methylene blue onto activated carbon produced from tea (Camellia sinensis L.) seed shells: kinetics, equilibrium, and thermodynamics studies*

Adsorption of methylene blue onto activated carbon produced from tea (Camellia sinensis L.) seed shells: kinetics, equilibrium, and thermodynamics studies*

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Abstract

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