Katyonlar Varlığında Karışık Mineralli Kilin Zeta Potansiyeli

Öz

Bu çalışmada, karışık mineralli kil (KMK) örneğinin Na⁺, Li⁺, Ca²⁺ tuz katyonları ve Zn²⁺, Cu²⁺, Al³⁺ metal katyonları varlığında zeta potansiyeli değerleri ölçülmüştür.  Genel sonuçlar incelendiğinde, zeta potansiyeli değerlerinin iki değerlikli ve üç değerlikli katyonların varlığında daha pozitif olduğu görülmektedir.  Metal iyonların varlığında KKM’nin zeta potansiyeli davranışının benzer olduğu görülmektedir. Metal iyonların konsantrasyonundaki artış, pH 7 civarına kadar zeta potansiyelini pozitif değerlere doğru olarak arttırmakta, ve pH 7 civarında zeta potansiyeli pozitif değerler almaktadır. Metal iyonları genellikle iki adet sıfır yüklü nokta (syn) meydana getirmiştir. KKM’nin zeta potansiyel değerleri saf montmorillonit ve saf kaolin ile karşılaştırılmıştır.

Anahtar Kelimeler

• Elektrokinetik dekontaminasyon,karışık mineralli kil,sıfır yük noktası,zeta potansiyeli

The Zeta Potential of a Mixed Mineral Clay in the Presence of Cations

Abstract

In the present study, zeta potential of a mixed mineral clay (MMC) was measured in the presence of salt cations; Na⁺, Li⁺ and Ca²⁺ and metal cations; Zn²⁺, Cu²⁺, and Al³⁺.  Results reveal that the zeta potential of the MMC, in general, becomes more positive in the presence of divalent and trivalent cations.  In presence of metal ions the zeta potential of the MMC has similar trends, i.e., increase in the concentration of these ions causes an increase in the zeta potential to the positive values up to around pH 7, and then it becomes positive; and produces generally two apparent pzcs (point of zero charges).  The zeta potential values of the MMC were compared with those of pure montmorillonite and pure kaolinite.

Keywords

• Electrokinetic decontamination,mixed mineral clay,zero point of charge potential,zeta potential

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