lt has been studied the influence of the concentration and the pH of solution of sodium alginate in the kinetic of coagulation of colloidal system of Fe(OH)3 with positive colloidal particles. From the experimental date we deduce that coagulation is better for 0.1% of concentration and pH=4.

lt has been studied the influence of the concentration and the pH of solution of sodium alginate in the kinetic of coagulation of colloidal system of Fe(OH)3 with positive colloidal particles. From the experimental date we deduce that coagulation is better for 0.1% of concentration and pH=4.

Were obtained dried calcium alginate beads of 1 mm diameter. The optimum pH for the biosorption of Cu (II) is between 4.5 and 5. The study of the kinetics of biosorption was determined that the thermodynamic equilibrium is reached after 24 h. The data fit very well with the Langmuir model, and shows that the maximum biosorption is Qmax = 80.6 mg / g.

Were obtained dried calcium alginate beads of 1 mm diameter. The optimum pH for the biosorption of Cu (II) is between 4.5 and 5. The study of the kinetics of biosorption was determined that the thermodynamic equilibrium is reached after 24 h. The data fit very well with the Langmuir model, and shows that the maximum biosorption is Qmax = 80.6 mg / g.

Copper (11) adsorption properties of pre-treated biomass of marina algae Grateloupia doryophora (Rhodophyta) were investigated. The native biomass was treated with 0.2 M CaCl2, solution for 24 h under slow stirring. The solution pH was kept constant at pH = 5.0 using 0.1 M NaOH. The treated biomass was dried in an oven at 40ºC for 24 h. The adsorption capacity of the biomass strongly depends on equilibrium solution pH. At solution pH between 4 and 4,5 were observed the maximum adsorptive capacity of the pre-treated biomass.

Copper (11) adsorption properties of pre-treated biomass of marina algae Grateloupia doryophora (Rhodophyta) were investigated. The native biomass was treated with 0.2 M CaCl2, solution for 24 h under slow stirring. The solution pH was kept constant at pH = 5.0 using 0.1 M NaOH. The treated biomass was dried in an oven at 40ºC for 24 h. The adsorption capacity of the biomass strongly depends on equilibrium solution pH. At solution pH between 4 and 4,5 were observed the maximum adsorptive capacity of the pre-treated biomass.