Adsorption of strontium (II) ions from aqueous solution onto bottom ash of expired drug incineration

Bottom Ash of Expired Drug Incineration (BAEDI) is used in this study for the removal of Sr(II). In the kinetic study, the experimental results are tested. The results obtained show that the pseudo-second order and ninth order models fit the data. Thermodynamic study suggests that the process is: spontaneous, endothermic and with a raised affinity for Sr2+. The results obtained (Delta H degrees = 37.58 kJ mol(-1), E-a = 21.35 kJ mol(-1)) show that the adsorption of Sr2+ is a physical nature. Statistical analysis and the parameters obtained, revealed that the models used are suitable for the data. The maximum adsorption capacity (q(m)), calculated by using Langmuir model, is 38 mgg(-1).

Automated summary

The study used Bottom Ash of Expired Drug Incineration (BAEDI) for the removal of Sr(II), finding that the pseudo-second order and ninth order models fit the data, and the thermodynamic study indicated a spontaneous, endothermic process with increased affinity for Sr2+. The adsorption of Sr2+ was found to be of a physical nature, and the Langmuir model calculated a maximum adsorption capacity of 38 mgg(-1).