ADSORPTION OF HEAVY METALS USING ACTIVATED CARBONS PREPARED FROM AGUAJE STONES

• Autores: Sun-Kou, María del Rosario, Obregón-Valencia, Daniel, Pinedo-Flores, Ángela, Ana Lucía Paredes-Doig, Aylas-Orejón, Javier
• Formato: artículo
• Fecha de Publicación: 2014
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/159
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/159
• Nivel de acceso: acceso abierto
• Materia: activated carbon; aguaje stones; lead; cadmium; chromium; carbón activado; semillas de aguaje; plomo; cadmio; cromo

Aguaje seed (a typical Amazonian forest fruit) was used as a precursor material for the production of activated carbon using phosphoric acid as activating agent in two different concentrations: 0,75 and 1,0 gH3PO4/gPrecursor. The physicochemical properties were studied by N2 sorption measurements, Boehm titration, scanning electron microscopy and energydispersive X-ray spectroscopy. Activated carbons were used in the adsorption of three heavy metals: lead, cadmium and chromium. The maximum adsorption capacity was achieved using activated carbon AG0,75_600 in a solution with a pH greater than 4 and the values -1 -1 obtained were in the following order: lead (74,8 mg g ), cadmium (26,5 mg g ), chromium -1 (18,8 mg g ). The most important factors influencing the adsorption process were the pH of the solution, the porous structure and surface acidity of the activated carbon.