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Microwave Irradiated and Thermally Heated Olive Stone Activated Carbon for Nickel Adsorption from Synthetic Wastewater: A Comparative Study

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Abstract:
In attempt to compare the removal efficiency and yield of the activated carbon prepared using the conventional and microwave-assisted heating is the focus of this work. Toward this olive stone (a biomass precursor) is activated using the popular activating agent potassium hydroxide. The process optimization exercise is carried out by using the standard full factorial statistical design of experiments (response surface methodology). The activated carbons prepared under the optimized conditions are compared based on the adsorption capacity and yield. The adsorption capacity was found higher using microwave heating as compared with conventional heating. The microwave heating requires significantly lesser holding time as compared to conventional heating method to produce activated carbon of comparable quality, with higher yield. The BET surface area of carbon using microwave heating is significantly higher than the conventional heating. Although the mesopore surface area of carbon is not vary significantly, the activation time, power, and nitrogen gas consumption are significantly lower than the conventional heating rendering that the activation process via microwave is more economical than that via conventional heating. The adsorption isotherm data fitted the Langmuir isotherm well and the monolayer adsorption capacity was found to be 12.0 and 8.42 mg/g for microwave and thermally heated activated carbon, respectively. Regeneration studies showed that microwave-irradiated and thermally heated olive stone could be used several times by desorption with an HCl reagent. Both carbons can be used for the efficient removal of Ni21 (>99%) from contaminated wastewater.

Keywords: activated carbon, nickel adsorption, microwave and thermal heating, olive stone, response surface
methodology

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Ketersediaan

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Informasi Detail

Judul Seri

REACTION ENGINEERING, KINETICS, AND CATALYSIS

No. Panggil

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Penerbit

New York : American Institute of Chemical Engineers., 2014

Deskripsi Fisik

AIChE Journal January 2014 Vol. 60, No. 1

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 MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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