Cáscara de cacao modificado químicamente para la recuperación selectiva de cadmio en soluciones acuosas.

Abstract

Currently, one of the biggest problems worldwide is the contamination of water resources due to the presence of heavy metals generated by industrial activities that cause health problems for those who are supplied with this resource. Thus, the use of organic waste as raw material to mitigate this situation has currently increased. Cadmium is a metal that is released into the environment in natural ways from volcanic activities to forest fires, causing a negative impact on health due to its toxicity.In the present research, we seek to obtain an adsorbent material from cocoa shells that, through chemical modification, selectively recovers cadmium in aqueous solutions.In the experimental part, two adsorbent materials were prepared: cocoa shell powder oxidized with sulfuric acid (CCA) and cocoa shell powder oxidized with 96% TEMPO (CCT). In order to determine the adsorption capacity of these materials, five studies were carried out.