Kinetic and equilibrium study on uptake of iodide ion by calcined layered double hydroxides

摘要: Abstract Iodide contamination removed using calcined MgAl-CO3 layered double hydroxides (denoted as CLDH) was conducted in batch conditions. The equilibrium isotherms of uptake iodide by CLDH were well fitted the Langmuir equation, and thermodynamic parameters including ΔG 0, ΔH 0 ΔS calculated from constants. negative value confirms exothermic nature adsorption. values at 30, 40, 50 60°C indicate spontaneous suggests decreased randomness solid/solution interface for on CLDH. influences initial ion concentration, dosage CLDH, temperature removal have been tested kinetic, respectively. Three kinetic models used to fit experimental data, it found that pseudo-second order kinetics model could be describe process appropriately. E a 100.3 kJ mol−1, which s...