This research is a first-time investigation into the use of poly (amidoamine)(PAMAM)
dendrimers (Generation 4: G 4) as well-designed, highly-branched macromolecules with
abundant active amine groups for the adsorptive removal of nickel (Ni 2+) and lead (Pb 2+)
from aqueous phases. The adsorption capacity and efficiency were studied under various
operating conditions including a pH range of 2–7, contact time (t) of 2–12 min, initial heavy
metal (Ni 2+ or Pb 2+) concentration (C 0) of 50–200 mg/L, and adsorbent dose (m) of 0.04 …