REMOVAL OF Pb(II) AND Ni(II) IONS FROM AQUEOUS SOLUTION BY PEAT

摘要

The purpose of this study is to investigate the tendency of peat to adsorb Pb(II) and Ni(II) ions from an aqueous solution. The experiments conducted aimed at studying the effect of initial metal ion concentration, adsorbent dosage, aqueous solution pH and aqueous solution temperature in the single-component aqueous solutions. In addition, a binary-component aqueous solution was used to investigate the effects of contact time and desorption. According to the results of the experiments carried out under these conditions, it has been established that the optimum peat dosage is 2 g peat/L, the optimum pH 6, the optimum initial metal ion concentration 5 mg/L Pb(II) and 5 mg/L Ni(II), the aqueous solution temperature 20 ℃, and contact time 60 min. According to the results of all experimental conditions, the adsorption capacity was found to be Pb(II) > Ni(II). It has been established that the adsorption isotherm is well-suited to the Langmuir isotherm.