Nickel Removal From Contaminated Water Using Synthetic Polymeric Nanoadsorbent

摘要

In this research, the preparation of polyaniline (PAn)/ nanoclay nanocomposite asadsorbent was discussed and the capability of adsorbing nickel ions was studied. Thepolyaniline nanocomposite was prepared in presence of KIO3 as an oxidant, coated onnanoclay via casting method. The morphology and chemical structure of absorbentevaluated by with scanning electron microscopy (SEM) and Fourier-transform infraredspectroscopy (FTIR), respectively. TEM image indicate that nanocomposite ofpolyaniline with nanoclay synthesized successfully with the approximately 50 nmdiameter. In this study we were used a novel adsorbent, of polyaniline / nanoclaynanocomposite, for removing Ni(II) from aqueous solution. The effect of pH, initialNi(II) concentration and contact time on the efficiency of Ni(II) removal wereinvestigated systematically by batch experiments. Optimum conditions for nickel ionsremoval were found to be pH 3, adsorbent dosage of 10 g/L and equilibrium time of 30minutes. The adsorption kinetics well fitted using a pseudo second-order kinetic model.The equilibrium adsorption isotherm was better described by Langmuir adsorptionisotherm model. The adsorption capacity (qmax) of PAn/Clay for nickel ions in termsof monolayer adsorption was 24.27 mg/g.