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以木质素磺酸钠(LS)、丙烯酰胺(AM)、马来酸酐(MAH)为原料,膨润土(Ben)为无机添加剂,过硫酸钾(KPS)为引发剂,N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,通过溶液自由基接枝共聚法制备了膨润土/木质素磺酸钠接枝丙烯酰胺-马来酸酐(Ben/LS-g-AM-co-MAH)选择性吸附树脂。采用元素分析(EA)、比表面积和孔径分析(BET)、FTIR、核磁共振碳谱(13 C NMR)、XRD、SEM-EDS及XPS对所得吸附树脂的组成与结构进行了表征。结果表明:Ben/LS-g-AM-co-MAH的结构中含有大量的酰胺基和羧基基团,其在二元Pb2+/Cu2+溶液中对Pb2+具有较高的吸附量以及良好的吸附选择性。
Using sodium lignosulphonate (LS), acrylamide (AM) and maleic anhydride (MAH) as raw materials, bentonite (Ben) as inorganic additive, potassium persulfate (KPS) as initiator and N, (Ben / LS-g-AM-co-MAH) was prepared by solution radical graft copolymerization using NMBA as crosslinking agent. Selective adsorption resin. The composition and structure of the obtained adsorbent resin were characterized by elemental analysis (EA), BET surface area and pore size distribution (BET), FTIR, 13 C NMR, XRD, SEM-EDS and XPS. The results show that the structure of Ben / LS-g-AM-co-MAH contains a large amount of amide groups and carboxyl groups, which have higher adsorption capacity and good adsorption selectivity for Pb2 + in binary Pb2 + / Cu2 + .