A 50-mL volume of metallic solution was placed in a
propylene tube containing 0.5 g of treated macroalga
The mixtures were stirred in an orbital shaker at
100 rpm for 24 h. The algal biomass was then filtered
through a 400-μm pore size nylon mesh filter. The
filtrates were analyzed for concentrations of cadmium
and copper ions with an atomic absorption spectrophotometer
(Avanta, GBC Scientific Equipment, Melbourne,
Australia). All experiments were performed in
triplicate