. 2014, 45(02): 12-0.
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Bentonite/sodium lignosulfonate graft acrylamide and maleic anhydride adsorbent composites (BLAMA) was prepared by solution polymerization using sodium lignosulfonate (LS-Na), acrylamide (AM) and maleic anhydride (MAH) as raw materials, bentonite as inorganic filler, potassium peroxydisulfate (KPS) as initiator, N, N-methylene-bis-acrylamide (NMBA) as crosslinker.Based on the assessment of the adsorption capacity of Pb2+ and the selectivity of Pb2+ to Cu2+ in the Pb2+/Cu2+ binary metal ion solution, the preferable formula was obtained as follow: m(LS-Na): m(Mtotal)=1:7, m(AM): m(MAH)=1:1, m(KPS)= 0.7﹪, m(NMBA)= 0.3﹪(the mass of KPS and NMBA was both based on total mass of monomer, Mtotal), pH=4. And in this condition, BLAMA had a higher adsorption capacity and its maximum value of Pb2+ was 0.471mmol/g, and the adsorption selectivity of Pb2+ to Cu2+ was 3.6:1(mole ratio) in the Pb2+/Cu2+ binary metal ion solution.