Resumo

GARCIA VILLEGAS, Víctor R. et al. Lead (II) biosorption equilibrium and characterization through FT-IR AND SEM-EDAX crosslinked pectin from orange peels. Rev. Soc. Quím. Perú [online]. 2013, vol.79, n.3, pp.256-264. ISSN 1810-634X.

Pectic material extracted from orange peels was previously cross-linked to diminish hydration and swelling capacity when pectin is found in aqueous solution medium. Degree of metoxilation (DM), galacturonic acid anhydrous (%AGA) and pKa determination allowed characterizing biosorbent. Maximum sorption capacity was obtained at pH between 4.5 and 5.5. For data processing and statistical treatment informatics Orign 6.0 version program was used. Data from biosorption equilibrium had a better fit on Langmuir sorption equation model, obtaining q_max = 186 mg/g as a maximum adsorption capacity. Fourier transform infrared spectroscopy analysis (FT-IR) allowed recognizing characteristic functional groups presents as well as biomass modifications. Biosorbent surface morphologic was studied by scanning electron microscope (SEM) and elemental composition biomass before biosorpton process was obtained through Energy-dispersive X-ray spectroscopy (EDAX).

Palavras-chave : biosorptión; pectin; lead; isotherm; Langmuir.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )