Biosorption of Cu(II), Zn(II), Cd(II) and Pb(II) by dead biomasses of green alga Ulva lactuca and the development of a sustainable matrix for adsorption implementation

Areco, María M.Hanela, Sergio.Durán, Jorge.Afonso, María.2023-11-302023-11-302012https://repositorio.ina.gob.ar/handle/123456789/522Fil: Areco, María Mar. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Buenos Aires. Instituto de Química Física de los Materiales, Medio Ambiente y Energía; Argentina.Fil: Hanela, Sergio. Instituto Nacional del Agua. Centro de Tecnologías del Uso del Agua. Programa de Tecnologías de Tratamiento; Argentina.Fil; Durán, Jorge. Instituto Nacional del Agua. Centro de Tecnologías del Uso del Agua. Programa de Tecnologías de Tratamiento; Argentina.Fil: Afonso, María. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Buenos Aires. Instituto de Química Física de los Materiales, Medio Ambiente y Energía; Argentina.Many industries have high heavy metals concentrations in their effluents that should be treated before disposal in drains or natural watercourses. When adsorption process is evaluated to generate and implement an efficient, economical and sustainable method suitable for heavy metals removal from contaminated effluents, it is necessary to develop an experimental setup that contains the adsorbent. Ulva lactuca, a marine green alga, was studied as a natural biosorbent for heavy metals at acid pH conditions. Adsorption experiments were carried out in glass columns and in batch where the alga was suspended or fixed in an agar matrix. Langmuir and Freundlich models were applied to the experimental results. Langmuir model best describes the adsorption isotherms in all analyzed cases. The adsorption capacity increases with pH. Kinetic studies demonstrate that, in most studied cases, the adsorption follows a pseudo second order kinetics model. Removal efficiencies of the biomaterial supported in agar or fixed in columns were: fixed in columns > suspended in batch mode > fixed in agar. Finally, the effect of the presence of two sorbates, Cd and Pb, in the solution was measured and results demonstrate that adsorption of both metals are diminished by co/adsorption.enhttp://creativecommons.org/licenses/by/4.0/ar/Biosorption of Cu(II), Zn(II), Cd(II) and Pb(II) by dead biomasses of green alga Ulva lactuca and the development of a sustainable matrix for adsorption implementationInforme Técnico