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Microwave assisted one-step preparation of macadamia nuts shell based activated carbon for efficient adsorption of Reactive Blue

Abstract

In this work, macadamia nut shell-based activated carbon (MNSAC) was prepared using macadamia nut shells (MNS) through KOH activation under microwave radiation. The optimum conditions for preparing MNSAC through response surface method were as follows: microwave power 600 W, activation time 10 min, and mass ratio 2:1 (KOH: MNS). The Brunauer–Emmet–Teller surface area of MNSAC was 876.77 m2/g, and the total volume was 0.533 cm3/g. SEM and FTIR analyses indicated pores and functional groups on the material surface significantly changed after activation. Experimental results revealed the suitability of macadamia nut shells to be used as a precursor for activated carbon. The maximum adsorption capacity of RB-19 onto MNSAC reached 376.81 mg/g at 293 K. The sorption behavior fitted to the pseudo-second-order kinetic model and the Langmuir isotherm. Thermodynamic parameters, namely, ΔG0, ΔH0, and ΔS0, showed that the sorption process of RB-19 was spontaneous, endothermic, and prone to increase in entropy. Microwave radiation is an efficient and rapid method for preparing a newly developed MNSAC alternative to commercial carbon which may be used as a cleaner and ecologically compatible adsorbent for effective removal of dye pollutants.

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Publication details

The article was received on 25 Aug 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03208K
Citation: New J. Chem., 2017, Accepted Manuscript
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    Microwave assisted one-step preparation of macadamia nuts shell based activated carbon for efficient adsorption of Reactive Blue

    C. Du, Y. Xue, Z. Wu and Z. Wu, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03208K

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