In vitro
Equilibrium dialysis experiments were carried out in solutions
containing varying concentrations of either Cd (as Cd(OH)2) in
saline or Pb (as lead acetate) in water with or without the addition
of 1 g alginic acid/100 ml. Equilibration lasted for a minimum of
24 h at room temperature. The extent of the binding by alginate
increased as metal concentration increased. At concentrations of 10
and 50 µg Pb/L, 0.7 and 5 mg Pb, respectively, was bound per g
alginic acid. At concentrations of 0.01, 0.1, 5 and 10 µg Cd/L 0.09,
0.4, 2.1 and 7.5 mg Cd, respectively, were bound to 1 g alginic acid
(Rose & Quarterman, 1987).
Rats