Activated carbon obtained from sapelli wood sawdust by microwave heating for o-cresol adsorption

Abstract

Activated carbon (AC) was prepared from sapelli wood sawdust using a microwave heating process. The biomass was mixed with inorganic components (lime ? ZnCl 2 and FeCl 3) to form a homogeneous paste. The AC samples are denoted as AC-1A (100 g sapelli wood sawdust ? 20 g lime ? 80 g ZnCl 2), AC-2A (150 g sapelli wood sawdust ? 20 g lime ? 80 g ZnCl 2), AC-1B (100 g sapelli wood sawdust ? 20 g lime ? 40 g ZnCl 2 ? 40 g FeCl 3), and AC-2B (150 g sapelli wood sawdust ? 20 g lime ? 40 g ZnCl 2 ? 40 g FeCl 3). The samples were placed in a microwave oven and pyrolyzed under nitrogen flow. To increase their porosity, the pyrolyzed samples were subjected to a leaching process (with 6 mol L-1 HCl) under reflux to eliminate inorganic components. Several analytical techniques such as Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and N 2 isotherm and vapor adsorption analyses were performed to characterize the AC materials. The samples presented high Brunauer-Electronic supplementary material The online version of this article (

Activated carbons from avocado seed: optimisation and application for removal of several emerging organic compounds

“…Adsorption technology using different adsorbents has been considered as one of the most efficient and economic method for treatment of effluents containing emerging organic pollutants such phenols and pharmaceuticals (Saucier et al 2015(Saucier et al , 2017Thue et al 2016Thue et al , 2017). Accordingly, a large variety of adsorbent materials have been proposed and studied for their ability to remove emerging organic pollutants (Takdastan et al 2016;Rossner et al 2009;Prola et al 2013b;Rovani et al 2016).…”

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“…However, for the preparation of activated carbons using pyrolysis of the biomass (Calvete et al 2010;Ribas et al 2014), there are some factors that might affect the final quality (porosity, surface chemistry and therefore the performance of adsorption) of the materials such as hold temperature and time (dos Reis et al 2016c;Thue et al 2017;Ribas et al 2014). Then, a multivariate technique extensively and usefully is needed for applying in optimisation of procedures through fast, economic and effective pathway and allows more than one variable to be optimized simultaneously (Bruns et al 2016;dos Reis et al 2016c;Ennaciri et al 2014).…”

Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions

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