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International Academy of Wood Science 2018 Annual Meeting

Papers Proceedings »

Biochar functionalized by HSO3 of Agave tequilana Weber leaves

In the process of hydrothermal carbonization (HTC) carbons are obtained, which are known as hydrochars. These carbons have a low surface area, to compensate this, the functionalization stage is carried out in a chemical stage subsequent to the HTC process, in which the area can be increased and results in a functionalized carbon. This work studied the obtaining of a functionalized carbon in a single stage using green leaves of Agave tequilana Weber var blue, which was made by chemical activation with sulfurous acid. The variables studied were the treatment time (8, 16, 24 h) and the sulfonic acid concentration (0, 1.5, 3.0, 4.5%). The functionalized carbon obtained was morphologically characterized by the techniques SEM, TEM, DRX and BET and chemically by the techniques FTIR, NMR of solids, XPS and elemental analysis, to determine the level of functionalization that has been achieved by this single activation stage. With chemical activation, a potential application of functionalized carbon is the adsorption of heavy metals in residual solutions; the research focused on the adsorption of hexavalent chromium (Cr+6) where the influence of the pH of the solution and the concentration of Cr+6 was analyzed. With these studies, the functionalized carbon adsorption kinetics was made with 8 h of treatment and 4.5% of sulfurous acid. This carbon had an uptake of 19.50 mg Cr+6 / g CF-8H-4.5, a quite promising result

José Anzaldo Hernández
Universidad de Guadalajara
Mexico

Rodrigo Pérez Pimentel
Universidad de Guadalajara
Mexico

Rubén Sanjuán Dueñas
Universidad de Guadalajara
Mexico

Jorge Ramón Robledo Ortiz
Universidad de Guadalajara
Mexico

Lourdes Graciela Cabrera Chavarría
Universidad de Guadalajara
Mexico

Alejandra Sofia Juárez Villa
Universidad de Guadalajara
Mexico

 


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