Preparation and Characterization of Activated Carbon from Pyrolusite-Added Herb Residues

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Abstract:

The preparation of activated carbon from wastes could increase economic return and reduce pollution. It was found that the herb residues of ophiopogon japonicus can be used as a raw material for the production of activated carbon. In this study, a modified activated carbon was prepared from the pyrolusite-added herb residues by chemical activation with zinc chloride (ZnCl2). The objectives of this study were to prepare and characterize activated carbon. The effects of several preparation conditions on the iodine adsorption value were studied. The experimental results showed that the optimum preparation condition was as follows: pyrolusite addition of 5%, solid to liquid ratio of 1:2, activator concentration of 3 mol/L, activation temperature of 500 °C and activation time of 1 h. The activated carbon made by the above condition attained the specific surface area of 998.984 m2/g and the iodine adsorption value of 1178.21 mg/g. And the modified activated carbon with rougher surface and higher adsorption property was substantiated by scanning electron microscope (SEM) analysis.

Keywords: ACTIVATED CARBON; HERB RESIDUES; PYROLUSITE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/asl.2011.1942

Publication date: November 1, 2011

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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