ABSTRACT
Using zirconium tetrabutoxide, diaminedecane, and diamineoctane as precursors, a templated hexagonal zirconia matrix is synthesized and characterized by X-ray diffractometry and scanning electron microscopy. The adsorption capacity of such a matrix toward Co(II), Ni(II), Cu(II), and Zn(II) from aqueous solutions is studied. The adsorption affinity of the synthesized hexagonal templated zirconia toward the cations is Cu(II)>Zn(II) >>Ni(II)>Co(II). It is also verified that the adsorption of the cations follows a Langmuir and not a Freundlich isotherm. All obtained isotherms are of type I, according to the IUPAC classification. The observed adsorption affinity sequence can be explained by taking into account the velocity constant for the substitution of water molecules into the cation coordination spheres, as well as the Irving-Williams series.
Subject(s)
Cobalt/chemistry , Copper/chemistry , Nanostructures , Nickel/chemistry , Zinc/chemistry , Zirconium/chemistry , Adsorption , Cobalt/pharmacokinetics , Copper/pharmacokinetics , Gels/chemistry , Nickel/pharmacokinetics , Phase Transition , Surface Properties , Zinc/pharmacokinetics , Zirconium/pharmacokineticsABSTRACT
Em nosso meio, predominam as formas leves de desnutricao energetico-proteica na faixa etaria das criancas menores de cinco anos. Desta forma, o atendimento as criancas desnutridas acaba sendo feito principalmente em ambulatorio, principalmente nas unidades basicas de saude, onde devem ser desenvolvidas estrategias para uma adequada recuperacao nutricional. O objetivo e descrever uma experiencia de atendimento multiprofissional no combate a desnutricao energetico-proteica em criancas menores de cinco anos de idade, numa unidade basica de saude. Discute-se a importancia do atendimento em equipe de saude, do conhecimento das condicoes reais de vida da familia, por visitas domiciliares, assim como, do fortalecimento do vinculo mae-filho e da participacao ativa da familia em todas as atividades programadas