KINETIC STUDY OF LEAD (II) BIOSORPTION ON Ascophyllum Nodosum SEAWEED

• Autores: Ale Borja, Neptalí, García Villegas, Víctor, Yipmantin Ojeda, Andrea, Guzmán Lezama, Enrique, Maldonado García, Holger
• Formato: artículo
• Fecha de Publicación: 2015
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/18
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/18
• Nivel de acceso: acceso abierto
• Materia: Biosorption; Ascophyllum nodosum; lead, kinetic; pseudo-first order; pseudosecond order; Biosorción; plomo; cinética; pseudo-primer orden; pseudo-segundo orden

Biosorption optimal pH and kinetics of lead (II) on Ascophyllum nodosum seaweed at 20°Cwere studied. In order to improve structural stability of alginate and avoid leaching, thebiomass was pre-treated with CaCl2. Biosorption kinetics experimental data showed gratercoefficients of correlation (R2) on pseudo second order mathematic model. Physical chemistryparameters: particle size influence (75 μm - 180 μm and 0 μm - 75 μm) and biosorbent andmetal concentrations in solution were evaluated in the biosorption kinetics. Pseudo secondorder constant, k2 = 1.0x10-4 g.mg-1min-1, of biosorbent with particle size 75-180 μm increasedin 20% as particle size decreased to 0-75 μm, meanwhile, q2e increased from 67,7 to 94,5mg/g at the same conditions. Lead (II) residual concentrations in solution were determinedby atomic absorption spectroscopy. For data processing and statistic treatment of non-linearregression, Origin 6.0 informatics program was used.