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Optimization of preparation of activated carbon from cotton stalk by microwave assisted phosphoric acid-chemical activation

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Abstract:
The preparation of activated carbon (AC) from cotton stalk was investigated in this paper. Orthogonal
array experimental design method was used to optimize the preparation of AC using microwave assisted
phosphoric acid. Optimized parameters were radiation power of 400 W, radiation time of 8 min, concentration
of phosphoric acid of 50% by volume and impregnation time of 20 h, respectively. The surface
characteristics of the AC prepared under optimized condition were examined by pore structure analysis,
scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Pore structure
analysis shows that mecropores constitute more of the porosity of the prepared AC. Compared to cotton
stalk, different functionalities and morphology on the carbon surfaces were formed in the prepared
process. The adsorption capacity of the AC was also investigated by removing methylene blue (MB) in
aqueous solution. The equilibrium data of the adsorption was well fitted to the Langmuir isotherm. The
maximum adsorption capacity of MB on the prepared AC is 245.70 mg/g. The adsorption process follows
the pseudo-second-order kinetic model.

Keywords: Cotton stalk, Orthogonal array experimental design, Microwave radiation, Isotherm, Kinetic

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2010

Deskripsi Fisik

Journal of Hazardous Materials 182 (2010) 217–224

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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