The objectives of this work are: (i) to evaluate two types of
brown seaweeds – L. nigrescens and D. antarctica – to be used as
bisorbents of cadmium, (ii) to determine the wastewater pH (in
the range between pH 3.2 and 5.7) where the metal retention is
optimal, (iii) to determine the maximum adsorption capacity of
these seaweeds, (iv) to determine the adsorption isotherms, using
mathematical models to adjust the results, and (v) to determine
the biosorption kinetics, using mathematical models.