Response Surface Methodology Approach for Analysis of Phytoremediation Process of Pb(II) from Aqueous Solution Using Echinodorus palaefolius

Abstract

The purpose of this study was to observe the phytoremediation process for removal of Pb(II) from aqueous solution using Echinodorus palaefolius (Jasmine water). The process was determined by the root, stem and leaves ability to reduce the Pb(II). The experiment was done in three factors, as a function of weight of plant (2-10 g/100 mL), initial concentration of Pb(II) (10-30 mg/l) and contact time (30-120 minutes) into the final concentration of Pb(II) removal as the response. The effect of three factors in Pb(II) phytoremediation was explained using response surface methodology (RSM). The results revealed that the phytoremediation process can successfully remediate Pb(II) from aqueous solution with the Pb(II) adsorbed ranging between 0.231 mg/L - 2.431 mg/L. The highest phytoadsorption of Pb(II) using Echinodorus palaeofolius occurred in roots. Optimizing the condition using 2FI model predicts weight of plant 2 gr, initial concentration of Pb(II) 30 mg/L and contact time 120 minutes. The initial concentration and contact time are significant factors influencing the phytoremediation process.