Adsorption of KLPAAM super-absorbents composites

作者：He Xinjian; Xie Jianjun^*; Zhang Huiying; Han Xinqiang; Wu Yiqiang

来源：Huagong Xuebao/CIESC Journal, 2011, 62(4): 1162-1169.

• Acrylamides
• Acrylic acid
• Acrylic acids
• Adsorption capacities
• Adsorption kinetics
• Adsorption mechanism
• Adsorption properties
• Adsorption rates
• Adsorption time
• Equilibrium value
• FTIR
• Initial concentration
• Langmuir equation
• Lignosulfonates
• pH value
• Pseudo second order
• Salt solution
• SEM
• Superabsorbent composites

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&middotg-1 and 169 mg &middot 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 < pH < 5.5 but decreased at pH>5.5. 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.

• 出版日期2011
• 单位中南大学