The adsorption of Cu (II) has been investigated for treated biomasses of orange shells, lemon shells and nopal, which contain pectin in its composition. The dry and crushed biomass was treated with NaOH, which produces the desmetoxilation of the pectin, later was treated with a solution 0,2 M of CaCl2, which allows improving the mechanical stability of the biomasses. The good pH in the process of bioadsorción of the Cu (II) was in the range of 4 - 4,5. The capacity biosorption these biomasses is evaluated in batch. The biosorption isotherms are described by the models of Langmuir and Freundlich. According to the pattern of Langmuir, the maximum capacities of adsorption (qmáx) of the treated biomasses were: shell of orange 36,23 mg/g, lemon 46,95 mg/g and nopal 44,25 mg/g.

Se ha investigado la adsorción de Cu (II) por biomasas tratadas de cáscaras de naranja, limón y nopal, las cuales contienen pectina en su composición. La biomasa seca y triturada fue tratada con NaOH, para producir la desmetoxilación de la pectina, posteriormente se trató con una solución 0,2 M de CaCl2, lo cual permite mejorar la estabilidad mecánica de las biomasas. El pH óptimo en el proceso de bioadsorción del Cu (II) se encontró en el rango de 4 - 4,5. La capacidad biosorción de estas biomasas se evalúa en ensayos de batch. Las isotermas de biosorción se describen por los modelos de Langmuir y Freundlich. De acuerdo al modelo de Langmuir, las capacidades máximas de adsorción (qmáx) de las biomasas tratadas fueron: cáscara de naranja 36,23 mg/g, limón 46,95 mg/g y nopal 44,25 mg/g.

The adsorbent capacity of biomasses pre-treated has been evaluated, containing pectin and alginate. The orange shells and lemon and the nopal palmets were dried and crushed, before being treated with NaOH to produce the demetoxilation of the pectin. For the reticulation of the polysaccharides they become agitated the biopolymers with a solution 0,2 M of CaCl2, improving their mechanical stability. The good pH in the process of biosorption of the Cu (II) it was in the range from 4 to 4.5. The capacity of biosorption of these biomasses was evaluated in assays type batch. The biosorption isotherms are described by the models of Langmuir, being obtained a maximum capacity of adsorption of 68,97 mg/g and equilibrium constant of 0,093.

The adsorbent capacity of biomasses pre-treated has been evaluated, containing pectin and alginate. The orange shells and lemon and the nopal palmets were dried and crushed, before being treated with NaOH to produce the demetoxilation of the pectin. For the reticulation of the polysaccharides they become agitated the biopolymers with a solution 0,2 M of CaCl2, improving their mechanical stability. The good pH in the process of biosorption of the Cu (II) it was in the range from 4 to 4.5. The capacity of biosorption of these biomasses was evaluated in assays type batch. The biosorption isotherms are described by the models of Langmuir, being obtained a maximum capacity of adsorption of 68,97 mg/g and equilibrium constant of 0,093.

It has been obtained bead of calcium alginate with micro-particles of algae Macrosystis Pyrifera. The optimum pH for adsorption of Cu(II) lie between 4,5 and 5. From the study of the kinetics of adsorption was determined that the equilibrium was reached after 400 min. The adsorption data fitted well with the Langmuir model and showed the maximum adsorption capacity qmax= 14,04 mg/g.

It has been obtained bead of calcium alginate with micro-particles of algae Macrosystis Pyrifera. The optimum pH for adsorption of Cu(II) lie between 4,5 and 5. From the study of the kinetics of adsorption was determined that the equilibrium was reached after 400 min. The adsorption data fitted well with the Langmuir model and showed the maximum adsorption capacity qmax= 14,04 mg/g.