Study on adsorption of Cu(II) in aqueous solution using zeolite 3A prepared from rice husk ash
Abstract
In the present work, 3A zeolite was formed via a process of exchanging sodium by potassium in 4A zeolite. The 3A zeolite was characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence (XRF). The chemical composition of the obtained product was 0,60K2O.0,39Na2O.Al2O3.2,02SiO2 with high crystalline. Its particles were completed with a uniform size in the range of 3 to 5 micrometer. Moreover, Cu(II) adsorption ability from aqueous solution onto 3A zeolite was investigated. With adsorbent’s dosage of 2,0 g.L-1 and at suitable pH of 4 to 5, more than 75 % of Cu(II) was removed from an aqueous solution that contained 40 mg Cu(II).L-1. Adsorption isotherm study confirmed that the Langmuir model well described the experimental data, and maximum adsorption capacity was about 33,1 mg.g-1.
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