Application of Response Surface Methodology for Optimization of Copper Removal from Aqueous Solution Using Magnesium Aluminium Hydrogenphosphate Layered Double Hydroxides

Abstract

Magnesium-aluminium hydrogenphosphate layered double hydroxide that synthesized by used of co-precipitation and followed by hydrothermal (MAHP4) method was used as an adsorbent to remove copper ions from aqueous solutions. The effects of various optimization parameters such as contact time, adsorbent dosage and lead ion concentrations were investigated by used of Response surface methodology (RSM). The Response surface methodology (RSM) based on a four-level-three variables Central Composite Rotatable Design (CCRD) was employed to evaluate the interactive effects of the various optimization parameters. The parameters were contact time (2-6 h), adsorbent dosage (0.01 0.05 g) and copper ion concentrations (50 100 mg/l). Simultaneously by increasing contact time and amount of dosage of MAHP4 used, the percentage of lead ion removal from aqueous solution was increased. However, the percentage removal decreases with an increase in concentrations of copper ion. The experimental percentage removal recorded under optimum conditions was compared well with the maximum predicted value from the RSM which suggest that fractional factorial design of RSM can be used to study the removal of copper from aqueous solution by used of magnesium-aluminium hydrogenphosphate layered double hydroxide as an adsorbent.