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+
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 2.5