Adsorción de plomo de aguas contaminadas usando el cactus Opuntia larreyi


Adsorción de plomo de aguas contaminadas usando el cactus Opuntia larreyi
Published in:	Industry, Innovation, and Infrastructure for Sustainable Cities and Communities: Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education and Technology
Date of Conference:	July 24-26, 2019
Location of Conference:	Montego Bay, Jamaica
Authors:	Uriel Raul Fernandez Bernaola (Universidad Nacional de San Antonio Abad del Cusco, PE) Ma Elena Navarro Clemente (Instituto Politécnico Nacional, MX) Amanda Rosa Maldonado Farfan (Universidad Nacional de San Antonio Abad del Cusco, PE) (Universidad Nacional de San Antonio Abad del Cusco)
Full Paper:	#163

Abstract: The adsorption of lead from polluted aqueous solutions was investigated using a biosorbent, without chlorophyll, obtained from Opuntia larreyi cactus in batch mode. The biomaterial was characterized using Fourier Transformed Infrared spectroscopy (FTIR), before and after contact with lead; in addition, the interaction between oxygen atoms from functional groups of the biosorbent and lead ions was studied using X-ray Photoelectron spectroscopy (XPS). At pH 5.7 the major adsorption capacity was achieved, 8.26 mg/g with an efficiency of 90 %. The adsorption kinetics of lead was best described by the pseudo-second-order model and the adsorption capacity was adequately described by the Freundlich adsorption isotherm.