The Removal of Heavy Metals Effluent from Wastewater by Nanoparticle Based on Polyoxometalates

In this study, a lacunar Polyoxometalate (POM) of Dawson type (α2P2W17O61)10− was prepared and tested in the complexation of (Ni2+) in aqueous solution. The stability of the formed complex (α2P2W17O61Ni)8− according to the reactional medium pH and the time were studied. The stoichiometry and the constant of stability of this formed complex were also studied. From where it was noted that this compound has rather high constant of stability, it was calculated to be β = 1.57 × 106. Thus this compound has interesting proprieties for fixing heavy metals such us nickel existing in industrial waste water.