Synthesized analcime zeolite: an effective adsorbent for removal of Pb(II) ions from aqueous solution

Abstract

In this study, analcime zeolite was synthesized via a simple and low-cost hydrothermal approach, and its absorption performance for the removal of Pb(II) ions from an aqueous solution was investigated. The effects of various parameters such as pH, adsorbent dosage, initial lead concentration, time, and temperature on adsorption were studied. The optimum values of pH, adsorbent dosage, and contact time were obtained, 6, 4 mg, and 30 min, respectively. The removal efficiency reached 95% under optimum conditions. It was demonstrated that the adsorption of Pb(II) ions could be properly described by the pseudo-second-order equation, suggesting that the adsorption process is presumably chemisorption. Besides, the equilibrium data fitted well with the Langmuir model, and the maximum adsorption capacity (q m) was obtained 54.64 mg g−1. Moreover, the results of the temperature effect studies confirmed that the removal of Pb(II) ions was endothermic.