Adsorption of Heavy Metals Cations onto Zeolite Material from Aqueous Solution

Abstract

expensive and with average efficiency.The most common and widely used methods for advanced heavy metal removal are: chemical precipitation, flotation, flocculation, sedimentation, solvent extraction, oxidation/reduction and dialysis/electro-dialysis, reverse osmosis, ultra filtration, electrochemical deposition, ion exchange and adsorption e.g.Choosing one or more complex solutions is subject of efficiency and cost analysis reported at large quantity of wastewater.Among these, adsorption technologies have several advantages: easy operation and well known technology, inexpensive equipment, less sludge, adsorbents' reuse after desorption.In water the heavy metals cations are hydrated with different bipolar water molecules.Heavy metals (cadmium, copper, zinc, nickel) removal by adsorption was reported on, sugar beet pulp [7], bituminous coal, peat [8], clay and diatomite [9] natural zeolite [10] or on zeolite obtained by conversion of fly ash [11].This paper presents the synthesis, characterization and results of adsorption of zeolite ZCR40 obtained from fly ash by hydrothermal method, which were used as adsorbents in removal of Cd 2+ , Cu 2+ and Ni 2+ from mono-, di-, and three-component systems. Materials and MethodsRaw Fly Ash was collected from the electrostatic filters in the