The Study of Vietnamese Bonechar Synthesis and its Applications in Removal Organic Color

Abstract

Biochar was synthesized from two material sources such as animal waste or plant waste. In this work, biochar was synthesized going from bovine bone waste at Vietnam country, called as Vietnamese bone char (VNBC). Many steps of process to VNBC synthesis, and its surface characteristics were investigated, respectively. The applications of VNBC being as adsorbents were examined then. The results of synthesis process were obtained the VNBC product sample with optimal condition to be at temperature of 650 oC, corresponding to 120 minutes. The analysis on surface properties of VNBC indicated that the specific surface area were 120.315 m2/g, with pore diameter as 87.48 Å measured by BJH (Barrett, Joyner and Halenda) method. The surface morphology with the particle size measured by SEM (Scanning Electronic Spectroscopy) method was 70 nm. The composition compounds of VNBC contained calcium carbonate-hydroxyl apatite with the formula was Ca10(PO4)5.65(CO3)0.64(OH)3.45 measured by FT-IR (Fourier Transform Infrared Spectroscopy) and XRD (X-Ray Diffraction Spectroscopy) methods, respectively. In application, VNBC uses at optimal condition as an adsorbent to remove the organic color solutions for instance KMnO4 and methylene blue (MB) were considered. The results of VNBC adsorbent to remove the colored solutions measured by UV/VIS (Ultraviolet Visible spectroscopy) method are obtained with adsorption capacity of KMnO4 as from 33.51 to 46.22 mg color/g BC, and MB from 12.1 to 15.04 mg color/g BC, respectively. These results shown that VNBC were able to use making a potential adsorbent in the treatment of wastewater contained organic color in industry.