Magnezyum,kurşun ve manganez iyonlarının bentonit süspansiyonlarının jelleşme karakteristiği üzerindeki etkisi

Effects of MgO, MgCl ₂· ₆H ₂O, PbCl ₂ and MnCl ₂·2H ₂O as inorganic additives on gelling property of a bentonite were determined with gelling coefficient tests, sedimentation volume ratio tests and electrophoretic mobility measurements. These compounds when added into the bentonite suspension at concentrations of 1.5×10 ^-3 M were found to give maximum gelling coefficient and sedimentation volume ratio values corresponding to pH values (pH=8, 9 ve 10) of maximum MOH ⁺ type (PbOH ⁺, MnOH ⁺ and MgOH ⁺, respectively) complex formation. The gelling property was improved in the order Pb<Mn<Mg causing 11.5%, 20.1% and 30.1% increases in the gelling coefficient values of the sample. This increase was assigned to the formation of positively charged edge surfaces due to adsorption of MOH ⁺ type cations that form at specific pH values in the suspesion with respect to the type of cation.