Abstract:

Self-made kaolin/sodium lignosulfonate graft acrylic acid and acrylamide superabsorbent composites (KLPAAM）were used to measure the adsorption properties in CuCl₂ and ZnCl₂ salt solutions, and their adsorption mechanism was discussed by using FTIR, TG, SEM and adsorption kinetic simulation.The adsorption capacities of KLPAAM for Cu²⁺ increased with increasing initial concentrations of Cu²⁺ and then decreased, while the adsorption capacities of KLPAAM for Zn²⁺ increased with increasing initial concentrations of Zn²⁺ and then tended to reach an equilibrium value, and the relation fitted the Langmuir equation.The maximum adsorption capacities for Cu²⁺ and Zn²⁺ were 180 mg·g^-1 and 169 mg·g^-1 respectively.The pH values obviously affected the adsorption of KLPAAM for heavy metal ions.The adsorption capacities increased with increasing solutions pH values at 2.55.5.The adsorption kinetic equation of the relation between the adsorption capacities of KLPAAM for Cu²⁺ and Zn²⁺ and the adsorption time satisfied the pseudo-second order adsorption rate equation.

Key words: 复合高吸水树脂, 木质素, 丙烯酸, 丙烯酰胺, 接枝共聚, 吸附机理

摘要：

采用自制高岭土/木质素磺酸钠接枝丙烯酸-丙烯酰胺复合高吸水树脂(KLPAAM)，测定了其在CuCl²、ZnCl²溶液中的吸附性能；通过FTIR、TG、SEM及吸附动力学方程模拟，对其吸附机理进行了探讨。KLPAAM对Cu²⁺的吸附量随Cu²⁺复合高吸水树脂, 木质素, 丙烯酸, 丙烯酰胺, 接枝共聚, 吸附机理